./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-horseshoe.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-horseshoe.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 ceb2af5016fd0ad74653237fbc44a2b3541e4ff971325e3807dab6f19c05af6d --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-17 03:37:44,710 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-17 03:37:44,806 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-17 03:37:44,810 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-17 03:37:44,812 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-17 03:37:44,842 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-17 03:37:44,843 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-17 03:37:44,843 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-17 03:37:44,844 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-17 03:37:44,847 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-17 03:37:44,847 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-17 03:37:44,847 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-17 03:37:44,848 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-17 03:37:44,848 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-17 03:37:44,848 INFO L153 SettingsManager]: * Use SBE=true [2024-11-17 03:37:44,849 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-17 03:37:44,849 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-17 03:37:44,849 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-17 03:37:44,849 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-17 03:37:44,850 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-17 03:37:44,850 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-17 03:37:44,854 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-17 03:37:44,854 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-17 03:37:44,854 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-17 03:37:44,855 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-17 03:37:44,855 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-17 03:37:44,855 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-17 03:37:44,855 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-17 03:37:44,855 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-17 03:37:44,856 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-17 03:37:44,856 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-17 03:37:44,856 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-17 03:37:44,856 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-17 03:37:44,856 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 03:37:44,857 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-17 03:37:44,857 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-17 03:37:44,857 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-17 03:37:44,858 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-17 03:37:44,859 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-17 03:37:44,859 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-17 03:37:44,859 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-17 03:37:44,860 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-17 03:37:44,861 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ceb2af5016fd0ad74653237fbc44a2b3541e4ff971325e3807dab6f19c05af6d [2024-11-17 03:37:45,129 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-17 03:37:45,158 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-17 03:37:45,160 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-17 03:37:45,161 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-17 03:37:45,162 INFO L274 PluginConnector]: CDTParser initialized [2024-11-17 03:37:45,163 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-horseshoe.wvr.c [2024-11-17 03:37:46,619 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-17 03:37:46,865 INFO L384 CDTParser]: Found 1 translation units. [2024-11-17 03:37:46,867 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-horseshoe.wvr.c [2024-11-17 03:37:46,878 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a8de3a69/34feb321c66246108b4e61a91e0c2f29/FLAG149663f07 [2024-11-17 03:37:46,890 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a8de3a69/34feb321c66246108b4e61a91e0c2f29 [2024-11-17 03:37:46,893 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-17 03:37:46,894 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-17 03:37:46,895 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-17 03:37:46,895 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-17 03:37:46,901 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-17 03:37:46,902 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:37:46" (1/1) ... [2024-11-17 03:37:46,903 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@362fb84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:46, skipping insertion in model container [2024-11-17 03:37:46,903 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:37:46" (1/1) ... [2024-11-17 03:37:46,931 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-17 03:37:47,131 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 03:37:47,133 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 03:37:47,142 INFO L200 MainTranslator]: Completed pre-run [2024-11-17 03:37:47,166 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 03:37:47,184 INFO L204 MainTranslator]: Completed translation [2024-11-17 03:37:47,185 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:47 WrapperNode [2024-11-17 03:37:47,185 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-17 03:37:47,186 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-17 03:37:47,186 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-17 03:37:47,186 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-17 03:37:47,194 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:47" (1/1) ... [2024-11-17 03:37:47,202 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:47" (1/1) ... [2024-11-17 03:37:47,228 INFO L138 Inliner]: procedures = 24, calls = 41, calls flagged for inlining = 17, calls inlined = 19, statements flattened = 236 [2024-11-17 03:37:47,228 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-17 03:37:47,229 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-17 03:37:47,229 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-17 03:37:47,229 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-17 03:37:47,238 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:47" (1/1) ... [2024-11-17 03:37:47,239 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:47" (1/1) ... [2024-11-17 03:37:47,242 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:47" (1/1) ... [2024-11-17 03:37:47,265 INFO L175 MemorySlicer]: Split 9 memory accesses to 2 slices as follows [2, 7]. 78 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-11-17 03:37:47,266 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:47" (1/1) ... [2024-11-17 03:37:47,266 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:47" (1/1) ... [2024-11-17 03:37:47,274 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:47" (1/1) ... [2024-11-17 03:37:47,275 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:47" (1/1) ... [2024-11-17 03:37:47,281 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:47" (1/1) ... [2024-11-17 03:37:47,282 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:47" (1/1) ... [2024-11-17 03:37:47,285 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-17 03:37:47,286 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-17 03:37:47,287 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-17 03:37:47,287 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-17 03:37:47,288 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:47" (1/1) ... [2024-11-17 03:37:47,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 03:37:47,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:37:47,330 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 03:37:47,333 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 03:37:47,385 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-17 03:37:47,385 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-17 03:37:47,386 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-17 03:37:47,387 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-17 03:37:47,387 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-17 03:37:47,387 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-17 03:37:47,387 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-17 03:37:47,387 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-17 03:37:47,388 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-17 03:37:47,388 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-17 03:37:47,388 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-17 03:37:47,388 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-17 03:37:47,388 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-17 03:37:47,388 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-17 03:37:47,388 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-17 03:37:47,388 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-17 03:37:47,389 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-17 03:37:47,389 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-17 03:37:47,393 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 03:37:47,544 INFO L256 CfgBuilder]: Building ICFG [2024-11-17 03:37:47,547 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-17 03:37:48,031 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-17 03:37:48,032 INFO L307 CfgBuilder]: Performing block encoding [2024-11-17 03:37:48,308 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-17 03:37:48,308 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-17 03:37:48,309 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 03:37:48 BoogieIcfgContainer [2024-11-17 03:37:48,309 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-17 03:37:48,312 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-17 03:37:48,313 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-17 03:37:48,316 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-17 03:37:48,316 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:37:46" (1/3) ... [2024-11-17 03:37:48,317 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4798cc74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:37:48, skipping insertion in model container [2024-11-17 03:37:48,318 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:47" (2/3) ... [2024-11-17 03:37:48,319 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4798cc74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:37:48, skipping insertion in model container [2024-11-17 03:37:48,319 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 03:37:48" (3/3) ... [2024-11-17 03:37:48,320 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-horseshoe.wvr.c [2024-11-17 03:37:48,338 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-17 03:37:48,338 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2024-11-17 03:37:48,338 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-17 03:37:48,405 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-17 03:37:48,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 73 places, 75 transitions, 171 flow [2024-11-17 03:37:48,489 INFO L124 PetriNetUnfolderBase]: 12/72 cut-off events. [2024-11-17 03:37:48,490 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-17 03:37:48,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85 conditions, 72 events. 12/72 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 183 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 54. Up to 3 conditions per place. [2024-11-17 03:37:48,495 INFO L82 GeneralOperation]: Start removeDead. Operand has 73 places, 75 transitions, 171 flow [2024-11-17 03:37:48,499 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 69 places, 71 transitions, 160 flow [2024-11-17 03:37:48,537 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-17 03:37:48,545 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;@6256ba75, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-17 03:37:48,545 INFO L334 AbstractCegarLoop]: Starting to check reachability of 29 error locations. [2024-11-17 03:37:48,554 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-17 03:37:48,557 INFO L124 PetriNetUnfolderBase]: 2/7 cut-off events. [2024-11-17 03:37:48,557 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-17 03:37:48,557 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:37:48,558 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:37:48,559 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-11-17 03:37:48,571 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:37:48,571 INFO L85 PathProgramCache]: Analyzing trace with hash 20809399, now seen corresponding path program 1 times [2024-11-17 03:37:48,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:37:48,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958150970] [2024-11-17 03:37:48,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:37:48,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:37:48,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:37:48,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:37:48,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:37:48,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958150970] [2024-11-17 03:37:48,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958150970] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:37:48,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:37:48,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-17 03:37:48,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335540618] [2024-11-17 03:37:48,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:37:48,920 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:37:48,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:37:48,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:37:48,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:37:48,975 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 75 [2024-11-17 03:37:48,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 71 transitions, 160 flow. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:37:48,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:37:48,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 75 [2024-11-17 03:37:48,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:37:49,716 INFO L124 PetriNetUnfolderBase]: 2791/4609 cut-off events. [2024-11-17 03:37:49,716 INFO L125 PetriNetUnfolderBase]: For 151/151 co-relation queries the response was YES. [2024-11-17 03:37:49,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8661 conditions, 4609 events. 2791/4609 cut-off events. For 151/151 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 33321 event pairs, 2455 based on Foata normal form. 721/3571 useless extension candidates. Maximal degree in co-relation 8250. Up to 3799 conditions per place. [2024-11-17 03:37:49,757 INFO L140 encePairwiseOnDemand]: 63/75 looper letters, 37 selfloop transitions, 2 changer transitions 0/60 dead transitions. [2024-11-17 03:37:49,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 60 transitions, 216 flow [2024-11-17 03:37:49,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:37:49,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:37:49,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 124 transitions. [2024-11-17 03:37:49,771 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5511111111111111 [2024-11-17 03:37:49,773 INFO L175 Difference]: Start difference. First operand has 69 places, 71 transitions, 160 flow. Second operand 3 states and 124 transitions. [2024-11-17 03:37:49,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 60 transitions, 216 flow [2024-11-17 03:37:49,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 60 transitions, 204 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-17 03:37:49,785 INFO L231 Difference]: Finished difference. Result has 61 places, 60 transitions, 130 flow [2024-11-17 03:37:49,787 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=61, PETRI_TRANSITIONS=60} [2024-11-17 03:37:49,792 INFO L277 CegarLoopForPetriNet]: 69 programPoint places, -8 predicate places. [2024-11-17 03:37:49,793 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 60 transitions, 130 flow [2024-11-17 03:37:49,793 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:37:49,794 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:37:49,794 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:37:49,794 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-17 03:37:49,794 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-11-17 03:37:49,795 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:37:49,796 INFO L85 PathProgramCache]: Analyzing trace with hash 20809400, now seen corresponding path program 1 times [2024-11-17 03:37:49,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:37:49,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767427611] [2024-11-17 03:37:49,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:37:49,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:37:49,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:37:50,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:37:50,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:37:50,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767427611] [2024-11-17 03:37:50,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767427611] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:37:50,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:37:50,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:37:50,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968903523] [2024-11-17 03:37:50,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:37:50,175 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:37:50,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:37:50,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:37:50,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:37:50,211 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 75 [2024-11-17 03:37:50,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 60 transitions, 130 flow. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:37:50,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:37:50,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 75 [2024-11-17 03:37:50,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:37:50,773 INFO L124 PetriNetUnfolderBase]: 2793/4619 cut-off events. [2024-11-17 03:37:50,773 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2024-11-17 03:37:50,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8528 conditions, 4619 events. 2793/4619 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 33450 event pairs, 2455 based on Foata normal form. 0/2858 useless extension candidates. Maximal degree in co-relation 8484. Up to 3808 conditions per place. [2024-11-17 03:37:50,806 INFO L140 encePairwiseOnDemand]: 66/75 looper letters, 40 selfloop transitions, 7 changer transitions 0/66 dead transitions. [2024-11-17 03:37:50,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 66 transitions, 238 flow [2024-11-17 03:37:50,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:37:50,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:37:50,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 149 transitions. [2024-11-17 03:37:50,810 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49666666666666665 [2024-11-17 03:37:50,810 INFO L175 Difference]: Start difference. First operand has 61 places, 60 transitions, 130 flow. Second operand 4 states and 149 transitions. [2024-11-17 03:37:50,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 66 transitions, 238 flow [2024-11-17 03:37:50,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 66 transitions, 232 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:37:50,815 INFO L231 Difference]: Finished difference. Result has 65 places, 66 transitions, 182 flow [2024-11-17 03:37:50,816 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=182, PETRI_PLACES=65, PETRI_TRANSITIONS=66} [2024-11-17 03:37:50,817 INFO L277 CegarLoopForPetriNet]: 69 programPoint places, -4 predicate places. [2024-11-17 03:37:50,817 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 66 transitions, 182 flow [2024-11-17 03:37:50,817 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:37:50,817 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:37:50,818 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2024-11-17 03:37:50,818 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-17 03:37:50,819 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-11-17 03:37:50,819 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:37:50,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1458215460, now seen corresponding path program 1 times [2024-11-17 03:37:50,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:37:50,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624778429] [2024-11-17 03:37:50,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:37:50,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:37:50,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:37:51,098 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:37:51,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:37:51,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624778429] [2024-11-17 03:37:51,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624778429] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:37:51,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404181405] [2024-11-17 03:37:51,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:37:51,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:37:51,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:37:51,102 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:37:51,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-17 03:37:51,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:37:51,180 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-17 03:37:51,184 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:37:51,264 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-17 03:37:51,439 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:37:51,440 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:37:51,608 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:37:51,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404181405] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:37:51,609 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:37:51,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-17 03:37:51,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71196141] [2024-11-17 03:37:51,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:37:51,610 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-17 03:37:51,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:37:51,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-17 03:37:51,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-11-17 03:37:51,674 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 75 [2024-11-17 03:37:51,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 66 transitions, 182 flow. Second operand has 11 states, 11 states have (on average 24.363636363636363) internal successors, (268), 11 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:37:51,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:37:51,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 75 [2024-11-17 03:37:51,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:37:52,566 INFO L124 PetriNetUnfolderBase]: 2795/4627 cut-off events. [2024-11-17 03:37:52,567 INFO L125 PetriNetUnfolderBase]: For 37/37 co-relation queries the response was YES. [2024-11-17 03:37:52,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8572 conditions, 4627 events. 2795/4627 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 33402 event pairs, 2455 based on Foata normal form. 0/2868 useless extension candidates. Maximal degree in co-relation 8501. Up to 3801 conditions per place. [2024-11-17 03:37:52,608 INFO L140 encePairwiseOnDemand]: 66/75 looper letters, 39 selfloop transitions, 18 changer transitions 0/74 dead transitions. [2024-11-17 03:37:52,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 74 transitions, 322 flow [2024-11-17 03:37:52,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-17 03:37:52,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-17 03:37:52,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 245 transitions. [2024-11-17 03:37:52,611 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4083333333333333 [2024-11-17 03:37:52,611 INFO L175 Difference]: Start difference. First operand has 65 places, 66 transitions, 182 flow. Second operand 8 states and 245 transitions. [2024-11-17 03:37:52,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 74 transitions, 322 flow [2024-11-17 03:37:52,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 74 transitions, 322 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-17 03:37:52,614 INFO L231 Difference]: Finished difference. Result has 70 places, 70 transitions, 236 flow [2024-11-17 03:37:52,614 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=236, PETRI_PLACES=70, PETRI_TRANSITIONS=70} [2024-11-17 03:37:52,615 INFO L277 CegarLoopForPetriNet]: 69 programPoint places, 1 predicate places. [2024-11-17 03:37:52,615 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 70 transitions, 236 flow [2024-11-17 03:37:52,615 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 24.363636363636363) internal successors, (268), 11 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:37:52,616 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:37:52,616 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:37:52,636 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 03:37:52,816 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:37:52,818 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-11-17 03:37:52,819 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:37:52,819 INFO L85 PathProgramCache]: Analyzing trace with hash 528551945, now seen corresponding path program 1 times [2024-11-17 03:37:52,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:37:52,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431835265] [2024-11-17 03:37:52,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:37:52,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:37:52,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:37:52,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:37:52,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:37:52,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431835265] [2024-11-17 03:37:52,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431835265] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:37:52,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:37:52,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:37:52,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631035920] [2024-11-17 03:37:52,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:37:52,935 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:37:52,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:37:52,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:37:52,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:37:52,947 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 75 [2024-11-17 03:37:52,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 70 transitions, 236 flow. Second operand has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:37:52,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:37:52,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 75 [2024-11-17 03:37:52,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:37:53,428 INFO L124 PetriNetUnfolderBase]: 2880/4825 cut-off events. [2024-11-17 03:37:53,428 INFO L125 PetriNetUnfolderBase]: For 76/76 co-relation queries the response was YES. [2024-11-17 03:37:53,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8964 conditions, 4825 events. 2880/4825 cut-off events. For 76/76 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 34607 event pairs, 2530 based on Foata normal form. 78/3142 useless extension candidates. Maximal degree in co-relation 8504. Up to 3819 conditions per place. [2024-11-17 03:37:53,455 INFO L140 encePairwiseOnDemand]: 62/75 looper letters, 72 selfloop transitions, 4 changer transitions 1/94 dead transitions. [2024-11-17 03:37:53,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 94 transitions, 483 flow [2024-11-17 03:37:53,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:37:53,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:37:53,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 196 transitions. [2024-11-17 03:37:53,458 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5226666666666666 [2024-11-17 03:37:53,459 INFO L175 Difference]: Start difference. First operand has 70 places, 70 transitions, 236 flow. Second operand 5 states and 196 transitions. [2024-11-17 03:37:53,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 94 transitions, 483 flow [2024-11-17 03:37:53,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 94 transitions, 408 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-11-17 03:37:53,463 INFO L231 Difference]: Finished difference. Result has 70 places, 71 transitions, 220 flow [2024-11-17 03:37:53,463 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=220, PETRI_PLACES=70, PETRI_TRANSITIONS=71} [2024-11-17 03:37:53,465 INFO L277 CegarLoopForPetriNet]: 69 programPoint places, 1 predicate places. [2024-11-17 03:37:53,466 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 71 transitions, 220 flow [2024-11-17 03:37:53,467 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:37:53,467 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:37:53,467 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:37:53,467 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-17 03:37:53,467 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-11-17 03:37:53,467 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:37:53,468 INFO L85 PathProgramCache]: Analyzing trace with hash 424277877, now seen corresponding path program 1 times [2024-11-17 03:37:53,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:37:53,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11170212] [2024-11-17 03:37:53,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:37:53,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:37:53,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:37:53,581 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:37:53,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:37:53,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11170212] [2024-11-17 03:37:53,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11170212] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:37:53,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:37:53,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-17 03:37:53,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419177270] [2024-11-17 03:37:53,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:37:53,583 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:37:53,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:37:53,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:37:53,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:37:53,599 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 75 [2024-11-17 03:37:53,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 71 transitions, 220 flow. Second operand has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:37:53,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:37:53,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 75 [2024-11-17 03:37:53,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:37:53,906 INFO L124 PetriNetUnfolderBase]: 2033/3430 cut-off events. [2024-11-17 03:37:53,906 INFO L125 PetriNetUnfolderBase]: For 377/377 co-relation queries the response was YES. [2024-11-17 03:37:53,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7016 conditions, 3430 events. 2033/3430 cut-off events. For 377/377 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 22610 event pairs, 1757 based on Foata normal form. 0/2352 useless extension candidates. Maximal degree in co-relation 6635. Up to 2791 conditions per place. [2024-11-17 03:37:53,926 INFO L140 encePairwiseOnDemand]: 69/75 looper letters, 41 selfloop transitions, 7 changer transitions 0/68 dead transitions. [2024-11-17 03:37:53,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 68 transitions, 304 flow [2024-11-17 03:37:53,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:37:53,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:37:53,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 164 transitions. [2024-11-17 03:37:53,929 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43733333333333335 [2024-11-17 03:37:53,929 INFO L175 Difference]: Start difference. First operand has 70 places, 71 transitions, 220 flow. Second operand 5 states and 164 transitions. [2024-11-17 03:37:53,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 68 transitions, 304 flow [2024-11-17 03:37:53,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 68 transitions, 300 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-17 03:37:53,934 INFO L231 Difference]: Finished difference. Result has 70 places, 68 transitions, 218 flow [2024-11-17 03:37:53,934 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=218, PETRI_PLACES=70, PETRI_TRANSITIONS=68} [2024-11-17 03:37:53,934 INFO L277 CegarLoopForPetriNet]: 69 programPoint places, 1 predicate places. [2024-11-17 03:37:53,935 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 68 transitions, 218 flow [2024-11-17 03:37:53,935 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:37:53,935 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:37:53,935 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:37:53,935 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-17 03:37:53,935 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-11-17 03:37:53,935 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:37:53,936 INFO L85 PathProgramCache]: Analyzing trace with hash 424277878, now seen corresponding path program 1 times [2024-11-17 03:37:53,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:37:53,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006561255] [2024-11-17 03:37:53,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:37:53,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:37:53,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:37:54,201 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:37:54,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:37:54,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006561255] [2024-11-17 03:37:54,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006561255] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:37:54,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:37:54,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-17 03:37:54,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031294938] [2024-11-17 03:37:54,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:37:54,204 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-17 03:37:54,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:37:54,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-17 03:37:54,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-17 03:37:54,240 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 75 [2024-11-17 03:37:54,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 68 transitions, 218 flow. Second operand has 6 states, 6 states have (on average 24.666666666666668) internal successors, (148), 6 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:37:54,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:37:54,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 75 [2024-11-17 03:37:54,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:37:54,535 INFO L124 PetriNetUnfolderBase]: 1322/2259 cut-off events. [2024-11-17 03:37:54,535 INFO L125 PetriNetUnfolderBase]: For 324/324 co-relation queries the response was YES. [2024-11-17 03:37:54,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4488 conditions, 2259 events. 1322/2259 cut-off events. For 324/324 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 13124 event pairs, 1112 based on Foata normal form. 0/1740 useless extension candidates. Maximal degree in co-relation 4075. Up to 1849 conditions per place. [2024-11-17 03:37:54,548 INFO L140 encePairwiseOnDemand]: 70/75 looper letters, 44 selfloop transitions, 4 changer transitions 0/65 dead transitions. [2024-11-17 03:37:54,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 65 transitions, 302 flow [2024-11-17 03:37:54,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:37:54,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:37:54,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 130 transitions. [2024-11-17 03:37:54,550 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-11-17 03:37:54,551 INFO L175 Difference]: Start difference. First operand has 70 places, 68 transitions, 218 flow. Second operand 4 states and 130 transitions. [2024-11-17 03:37:54,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 65 transitions, 302 flow [2024-11-17 03:37:54,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 65 transitions, 285 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-17 03:37:54,556 INFO L231 Difference]: Finished difference. Result has 66 places, 65 transitions, 197 flow [2024-11-17 03:37:54,556 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=197, PETRI_PLACES=66, PETRI_TRANSITIONS=65} [2024-11-17 03:37:54,557 INFO L277 CegarLoopForPetriNet]: 69 programPoint places, -3 predicate places. [2024-11-17 03:37:54,558 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 65 transitions, 197 flow [2024-11-17 03:37:54,558 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.666666666666668) internal successors, (148), 6 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:37:54,558 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:37:54,559 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:37:54,559 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-17 03:37:54,561 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-11-17 03:37:54,561 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:37:54,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1275955706, now seen corresponding path program 1 times [2024-11-17 03:37:54,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:37:54,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087292449] [2024-11-17 03:37:54,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:37:54,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:37:54,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:37:54,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:37:54,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:37:54,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087292449] [2024-11-17 03:37:54,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087292449] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:37:54,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:37:54,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-17 03:37:54,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073069992] [2024-11-17 03:37:54,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:37:54,628 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:37:54,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:37:54,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:37:54,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:37:54,629 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 75 [2024-11-17 03:37:54,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 65 transitions, 197 flow. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:37:54,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:37:54,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 75 [2024-11-17 03:37:54,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:37:54,919 INFO L124 PetriNetUnfolderBase]: 1254/2189 cut-off events. [2024-11-17 03:37:54,920 INFO L125 PetriNetUnfolderBase]: For 360/360 co-relation queries the response was YES. [2024-11-17 03:37:54,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4434 conditions, 2189 events. 1254/2189 cut-off events. For 360/360 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 12367 event pairs, 469 based on Foata normal form. 41/1763 useless extension candidates. Maximal degree in co-relation 4213. Up to 1281 conditions per place. [2024-11-17 03:37:54,936 INFO L140 encePairwiseOnDemand]: 70/75 looper letters, 56 selfloop transitions, 2 changer transitions 2/79 dead transitions. [2024-11-17 03:37:54,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 79 transitions, 351 flow [2024-11-17 03:37:54,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:37:54,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:37:54,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 131 transitions. [2024-11-17 03:37:54,938 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5822222222222222 [2024-11-17 03:37:54,938 INFO L175 Difference]: Start difference. First operand has 66 places, 65 transitions, 197 flow. Second operand 3 states and 131 transitions. [2024-11-17 03:37:54,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 79 transitions, 351 flow [2024-11-17 03:37:54,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 79 transitions, 346 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:37:54,941 INFO L231 Difference]: Finished difference. Result has 67 places, 64 transitions, 197 flow [2024-11-17 03:37:54,941 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=197, PETRI_PLACES=67, PETRI_TRANSITIONS=64} [2024-11-17 03:37:54,943 INFO L277 CegarLoopForPetriNet]: 69 programPoint places, -2 predicate places. [2024-11-17 03:37:54,944 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 64 transitions, 197 flow [2024-11-17 03:37:54,944 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:37:54,944 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:37:54,945 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:37:54,945 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-17 03:37:54,945 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-11-17 03:37:54,945 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:37:54,946 INFO L85 PathProgramCache]: Analyzing trace with hash -125888670, now seen corresponding path program 1 times [2024-11-17 03:37:54,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:37:54,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069798148] [2024-11-17 03:37:54,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:37:54,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:37:54,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:37:55,005 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 03:37:55,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:37:55,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069798148] [2024-11-17 03:37:55,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069798148] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:37:55,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:37:55,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:37:55,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320555997] [2024-11-17 03:37:55,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:37:55,007 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:37:55,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:37:55,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:37:55,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:37:55,008 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 75 [2024-11-17 03:37:55,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 64 transitions, 197 flow. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:37:55,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:37:55,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 75 [2024-11-17 03:37:55,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:37:55,208 INFO L124 PetriNetUnfolderBase]: 1068/1871 cut-off events. [2024-11-17 03:37:55,208 INFO L125 PetriNetUnfolderBase]: For 402/402 co-relation queries the response was YES. [2024-11-17 03:37:55,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4045 conditions, 1871 events. 1068/1871 cut-off events. For 402/402 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 9398 event pairs, 387 based on Foata normal form. 8/1573 useless extension candidates. Maximal degree in co-relation 4004. Up to 1448 conditions per place. [2024-11-17 03:37:55,218 INFO L140 encePairwiseOnDemand]: 71/75 looper letters, 51 selfloop transitions, 3 changer transitions 0/73 dead transitions. [2024-11-17 03:37:55,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 73 transitions, 329 flow [2024-11-17 03:37:55,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:37:55,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:37:55,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 124 transitions. [2024-11-17 03:37:55,220 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5511111111111111 [2024-11-17 03:37:55,220 INFO L175 Difference]: Start difference. First operand has 67 places, 64 transitions, 197 flow. Second operand 3 states and 124 transitions. [2024-11-17 03:37:55,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 73 transitions, 329 flow [2024-11-17 03:37:55,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 73 transitions, 327 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-17 03:37:55,222 INFO L231 Difference]: Finished difference. Result has 67 places, 66 transitions, 218 flow [2024-11-17 03:37:55,222 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=218, PETRI_PLACES=67, PETRI_TRANSITIONS=66} [2024-11-17 03:37:55,223 INFO L277 CegarLoopForPetriNet]: 69 programPoint places, -2 predicate places. [2024-11-17 03:37:55,223 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 66 transitions, 218 flow [2024-11-17 03:37:55,223 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:37:55,223 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:37:55,223 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] [2024-11-17 03:37:55,224 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-17 03:37:55,224 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-11-17 03:37:55,224 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:37:55,224 INFO L85 PathProgramCache]: Analyzing trace with hash 2040334541, now seen corresponding path program 1 times [2024-11-17 03:37:55,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:37:55,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869523038] [2024-11-17 03:37:55,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:37:55,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:37:55,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:37:55,287 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 03:37:55,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:37:55,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869523038] [2024-11-17 03:37:55,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869523038] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:37:55,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:37:55,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-17 03:37:55,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416342583] [2024-11-17 03:37:55,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:37:55,289 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:37:55,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:37:55,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:37:55,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:37:55,299 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 75 [2024-11-17 03:37:55,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 66 transitions, 218 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 03:37:55,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:37:55,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 75 [2024-11-17 03:37:55,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:37:55,462 INFO L124 PetriNetUnfolderBase]: 780/1464 cut-off events. [2024-11-17 03:37:55,462 INFO L125 PetriNetUnfolderBase]: For 837/867 co-relation queries the response was YES. [2024-11-17 03:37:55,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3347 conditions, 1464 events. 780/1464 cut-off events. For 837/867 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 7459 event pairs, 538 based on Foata normal form. 0/1287 useless extension candidates. Maximal degree in co-relation 3304. Up to 1101 conditions per place. [2024-11-17 03:37:55,469 INFO L140 encePairwiseOnDemand]: 71/75 looper letters, 41 selfloop transitions, 4 changer transitions 0/64 dead transitions. [2024-11-17 03:37:55,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 64 transitions, 302 flow [2024-11-17 03:37:55,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:37:55,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:37:55,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 133 transitions. [2024-11-17 03:37:55,471 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44333333333333336 [2024-11-17 03:37:55,471 INFO L175 Difference]: Start difference. First operand has 67 places, 66 transitions, 218 flow. Second operand 4 states and 133 transitions. [2024-11-17 03:37:55,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 64 transitions, 302 flow [2024-11-17 03:37:55,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 64 transitions, 289 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-11-17 03:37:55,474 INFO L231 Difference]: Finished difference. Result has 66 places, 64 transitions, 207 flow [2024-11-17 03:37:55,474 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=207, PETRI_PLACES=66, PETRI_TRANSITIONS=64} [2024-11-17 03:37:55,474 INFO L277 CegarLoopForPetriNet]: 69 programPoint places, -3 predicate places. [2024-11-17 03:37:55,475 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 64 transitions, 207 flow [2024-11-17 03:37:55,475 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 03:37:55,475 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:37:55,475 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] [2024-11-17 03:37:55,475 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-17 03:37:55,476 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-11-17 03:37:55,476 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:37:55,476 INFO L85 PathProgramCache]: Analyzing trace with hash -384864322, now seen corresponding path program 1 times [2024-11-17 03:37:55,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:37:55,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369146648] [2024-11-17 03:37:55,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:37:55,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:37:55,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:37:55,552 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 03:37:55,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:37:55,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369146648] [2024-11-17 03:37:55,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369146648] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:37:55,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:37:55,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-17 03:37:55,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785698815] [2024-11-17 03:37:55,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:37:55,556 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:37:55,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:37:55,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:37:55,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:37:55,564 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 75 [2024-11-17 03:37:55,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 64 transitions, 207 flow. Second operand has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:37:55,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:37:55,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 75 [2024-11-17 03:37:55,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:37:55,782 INFO L124 PetriNetUnfolderBase]: 969/1876 cut-off events. [2024-11-17 03:37:55,782 INFO L125 PetriNetUnfolderBase]: For 467/481 co-relation queries the response was YES. [2024-11-17 03:37:55,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3905 conditions, 1876 events. 969/1876 cut-off events. For 467/481 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 10408 event pairs, 688 based on Foata normal form. 52/1719 useless extension candidates. Maximal degree in co-relation 3860. Up to 1108 conditions per place. [2024-11-17 03:37:55,792 INFO L140 encePairwiseOnDemand]: 67/75 looper letters, 41 selfloop transitions, 5 changer transitions 19/82 dead transitions. [2024-11-17 03:37:55,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 82 transitions, 387 flow [2024-11-17 03:37:55,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:37:55,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:37:55,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 181 transitions. [2024-11-17 03:37:55,793 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4826666666666667 [2024-11-17 03:37:55,794 INFO L175 Difference]: Start difference. First operand has 66 places, 64 transitions, 207 flow. Second operand 5 states and 181 transitions. [2024-11-17 03:37:55,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 82 transitions, 387 flow [2024-11-17 03:37:55,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 82 transitions, 382 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:37:55,796 INFO L231 Difference]: Finished difference. Result has 70 places, 63 transitions, 219 flow [2024-11-17 03:37:55,796 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=219, PETRI_PLACES=70, PETRI_TRANSITIONS=63} [2024-11-17 03:37:55,796 INFO L277 CegarLoopForPetriNet]: 69 programPoint places, 1 predicate places. [2024-11-17 03:37:55,797 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 63 transitions, 219 flow [2024-11-17 03:37:55,797 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:37:55,797 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:37:55,797 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] [2024-11-17 03:37:55,797 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-17 03:37:55,797 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-11-17 03:37:55,797 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:37:55,798 INFO L85 PathProgramCache]: Analyzing trace with hash -924557735, now seen corresponding path program 1 times [2024-11-17 03:37:55,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:37:55,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436923841] [2024-11-17 03:37:55,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:37:55,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:37:55,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:37:56,082 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 03:37:56,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:37:56,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436923841] [2024-11-17 03:37:56,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436923841] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:37:56,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522508823] [2024-11-17 03:37:56,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:37:56,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:37:56,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:37:56,085 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:37:56,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-17 03:37:56,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:37:56,184 INFO L255 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-17 03:37:56,186 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:37:56,328 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 03:37:56,328 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-17 03:37:56,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522508823] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:37:56,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-17 03:37:56,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2024-11-17 03:37:56,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256044184] [2024-11-17 03:37:56,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:37:56,329 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-17 03:37:56,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:37:56,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-17 03:37:56,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-17 03:37:56,361 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 75 [2024-11-17 03:37:56,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 63 transitions, 219 flow. Second operand has 6 states, 6 states have (on average 27.833333333333332) internal successors, (167), 6 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:37:56,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:37:56,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 75 [2024-11-17 03:37:56,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:37:56,546 INFO L124 PetriNetUnfolderBase]: 535/1093 cut-off events. [2024-11-17 03:37:56,546 INFO L125 PetriNetUnfolderBase]: For 376/394 co-relation queries the response was YES. [2024-11-17 03:37:56,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2272 conditions, 1093 events. 535/1093 cut-off events. For 376/394 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 5655 event pairs, 360 based on Foata normal form. 70/1048 useless extension candidates. Maximal degree in co-relation 2222. Up to 758 conditions per place. [2024-11-17 03:37:56,554 INFO L140 encePairwiseOnDemand]: 71/75 looper letters, 41 selfloop transitions, 3 changer transitions 0/61 dead transitions. [2024-11-17 03:37:56,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 61 transitions, 299 flow [2024-11-17 03:37:56,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:37:56,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:37:56,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 133 transitions. [2024-11-17 03:37:56,556 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44333333333333336 [2024-11-17 03:37:56,556 INFO L175 Difference]: Start difference. First operand has 70 places, 63 transitions, 219 flow. Second operand 4 states and 133 transitions. [2024-11-17 03:37:56,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 61 transitions, 299 flow [2024-11-17 03:37:56,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 61 transitions, 287 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-11-17 03:37:56,558 INFO L231 Difference]: Finished difference. Result has 67 places, 61 transitions, 205 flow [2024-11-17 03:37:56,559 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=205, PETRI_PLACES=67, PETRI_TRANSITIONS=61} [2024-11-17 03:37:56,560 INFO L277 CegarLoopForPetriNet]: 69 programPoint places, -2 predicate places. [2024-11-17 03:37:56,560 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 61 transitions, 205 flow [2024-11-17 03:37:56,560 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.833333333333332) internal successors, (167), 6 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:37:56,560 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:37:56,560 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:37:56,580 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 03:37:56,764 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,SelfDestructingSolverStorable10 [2024-11-17 03:37:56,765 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-11-17 03:37:56,766 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:37:56,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1337442516, now seen corresponding path program 1 times [2024-11-17 03:37:56,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:37:56,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934259864] [2024-11-17 03:37:56,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:37:56,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:37:56,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:37:58,180 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:37:58,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:37:58,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934259864] [2024-11-17 03:37:58,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934259864] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:37:58,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627791197] [2024-11-17 03:37:58,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:37:58,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:37:58,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:37:58,184 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:37:58,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-17 03:37:58,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:37:58,296 INFO L255 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-11-17 03:37:58,300 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:37:58,315 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-17 03:37:58,417 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 23 treesize of output 1 [2024-11-17 03:37:58,566 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-17 03:37:58,567 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-17 03:37:58,678 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-17 03:37:59,775 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:37:59,776 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:38:06,219 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-17 03:38:06,220 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 328 treesize of output 304 [2024-11-17 03:38:06,748 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:38:06,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627791197] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:38:06,749 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:38:06,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 42 [2024-11-17 03:38:06,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622046850] [2024-11-17 03:38:06,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:38:06,752 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-17 03:38:06,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:38:06,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-17 03:38:06,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1643, Unknown=1, NotChecked=0, Total=1806 [2024-11-17 03:38:10,965 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-17 03:38:15,285 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-17 03:38:20,002 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-17 03:38:24,533 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-17 03:38:24,534 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 75 [2024-11-17 03:38:24,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 61 transitions, 205 flow. Second operand has 43 states, 43 states have (on average 16.186046511627907) internal successors, (696), 43 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:38:24,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:38:24,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 75 [2024-11-17 03:38:24,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:39:03,644 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-17 03:39:07,161 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-17 03:39:07,448 INFO L124 PetriNetUnfolderBase]: 4958/8509 cut-off events. [2024-11-17 03:39:07,448 INFO L125 PetriNetUnfolderBase]: For 1820/1830 co-relation queries the response was YES. [2024-11-17 03:39:07,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18036 conditions, 8509 events. 4958/8509 cut-off events. For 1820/1830 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 53941 event pairs, 277 based on Foata normal form. 2/7925 useless extension candidates. Maximal degree in co-relation 14330. Up to 1838 conditions per place. [2024-11-17 03:39:07,496 INFO L140 encePairwiseOnDemand]: 56/75 looper letters, 437 selfloop transitions, 168 changer transitions 2/618 dead transitions. [2024-11-17 03:39:07,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 618 transitions, 2936 flow [2024-11-17 03:39:07,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2024-11-17 03:39:07,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2024-11-17 03:39:07,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 1594 transitions. [2024-11-17 03:39:07,505 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.29934272300469483 [2024-11-17 03:39:07,505 INFO L175 Difference]: Start difference. First operand has 67 places, 61 transitions, 205 flow. Second operand 71 states and 1594 transitions. [2024-11-17 03:39:07,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 618 transitions, 2936 flow [2024-11-17 03:39:07,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 618 transitions, 2929 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:39:07,522 INFO L231 Difference]: Finished difference. Result has 156 places, 229 transitions, 1374 flow [2024-11-17 03:39:07,523 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=71, PETRI_FLOW=1374, PETRI_PLACES=156, PETRI_TRANSITIONS=229} [2024-11-17 03:39:07,525 INFO L277 CegarLoopForPetriNet]: 69 programPoint places, 87 predicate places. [2024-11-17 03:39:07,525 INFO L471 AbstractCegarLoop]: Abstraction has has 156 places, 229 transitions, 1374 flow [2024-11-17 03:39:07,526 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 16.186046511627907) internal successors, (696), 43 states have internal predecessors, (696), 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 03:39:07,526 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:39:07,526 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:39:07,544 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 03:39:07,730 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:39:07,731 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-11-17 03:39:07,732 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:39:07,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1330015658, now seen corresponding path program 2 times [2024-11-17 03:39:07,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:39:07,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925295808] [2024-11-17 03:39:07,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:39:07,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:39:07,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:39:09,919 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:39:09,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:39:09,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925295808] [2024-11-17 03:39:09,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925295808] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:39:09,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703695922] [2024-11-17 03:39:09,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-17 03:39:09,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:39:09,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:39:09,923 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 03:39:09,925 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 03:39:10,008 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-17 03:39:10,008 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:39:10,009 INFO L255 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-17 03:39:10,011 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:39:10,705 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:39:10,705 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-17 03:39:10,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703695922] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:39:10,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-17 03:39:10,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [15] total 21 [2024-11-17 03:39:10,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865118573] [2024-11-17 03:39:10,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:39:10,707 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-17 03:39:10,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:39:10,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-17 03:39:10,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2024-11-17 03:39:10,755 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 75 [2024-11-17 03:39:10,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 229 transitions, 1374 flow. Second operand has 9 states, 9 states have (on average 26.333333333333332) internal successors, (237), 9 states have internal predecessors, (237), 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 03:39:10,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:39:10,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 75 [2024-11-17 03:39:10,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:39:11,862 INFO L124 PetriNetUnfolderBase]: 4363/7962 cut-off events. [2024-11-17 03:39:11,862 INFO L125 PetriNetUnfolderBase]: For 28542/28676 co-relation queries the response was YES. [2024-11-17 03:39:11,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24132 conditions, 7962 events. 4363/7962 cut-off events. For 28542/28676 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 54845 event pairs, 1032 based on Foata normal form. 95/7900 useless extension candidates. Maximal degree in co-relation 22896. Up to 5034 conditions per place. [2024-11-17 03:39:11,926 INFO L140 encePairwiseOnDemand]: 66/75 looper letters, 219 selfloop transitions, 31 changer transitions 2/274 dead transitions. [2024-11-17 03:39:11,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 274 transitions, 2003 flow [2024-11-17 03:39:11,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-17 03:39:11,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-17 03:39:11,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 275 transitions. [2024-11-17 03:39:11,928 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-11-17 03:39:11,928 INFO L175 Difference]: Start difference. First operand has 156 places, 229 transitions, 1374 flow. Second operand 8 states and 275 transitions. [2024-11-17 03:39:11,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 274 transitions, 2003 flow [2024-11-17 03:39:12,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 274 transitions, 1860 flow, removed 67 selfloop flow, removed 2 redundant places. [2024-11-17 03:39:12,065 INFO L231 Difference]: Finished difference. Result has 160 places, 221 transitions, 1350 flow [2024-11-17 03:39:12,066 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=1111, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1350, PETRI_PLACES=160, PETRI_TRANSITIONS=221} [2024-11-17 03:39:12,067 INFO L277 CegarLoopForPetriNet]: 69 programPoint places, 91 predicate places. [2024-11-17 03:39:12,067 INFO L471 AbstractCegarLoop]: Abstraction has has 160 places, 221 transitions, 1350 flow [2024-11-17 03:39:12,068 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 26.333333333333332) internal successors, (237), 9 states have internal predecessors, (237), 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 03:39:12,068 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:39:12,068 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:39:12,085 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 03:39:12,268 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:39:12,269 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-11-17 03:39:12,269 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:39:12,269 INFO L85 PathProgramCache]: Analyzing trace with hash 727548279, now seen corresponding path program 1 times [2024-11-17 03:39:12,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:39:12,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491901829] [2024-11-17 03:39:12,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:39:12,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:39:12,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:39:12,531 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:39:12,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:39:12,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491901829] [2024-11-17 03:39:12,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491901829] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:39:12,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510825629] [2024-11-17 03:39:12,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:39:12,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:39:12,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:39:12,534 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 03:39:12,535 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 03:39:12,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:39:12,635 INFO L255 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-17 03:39:12,637 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:39:12,925 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:39:12,925 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:39:13,257 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:39:13,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510825629] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:39:13,257 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:39:13,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 13 [2024-11-17 03:39:13,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773206113] [2024-11-17 03:39:13,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:39:13,258 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-17 03:39:13,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:39:13,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-17 03:39:13,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-11-17 03:39:13,395 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 75 [2024-11-17 03:39:13,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 221 transitions, 1350 flow. Second operand has 14 states, 14 states have (on average 29.5) internal successors, (413), 14 states have internal predecessors, (413), 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 03:39:13,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:39:13,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 75 [2024-11-17 03:39:13,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand