./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version fca748b1 Calling Ultimate with: /root/.sdkman/candidates/java/current/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 /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-three-array-max.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 670814d0a16da58b0f26835e20c05a244e2f373856f13b9d4ff2a931783edf81 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dd.update-z3-fca748b-m [2024-11-20 17:49:45,866 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-20 17:49:45,922 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-20 17:49:45,927 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-20 17:49:45,930 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-20 17:49:45,977 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-20 17:49:45,977 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-20 17:49:45,978 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-20 17:49:45,978 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-20 17:49:45,982 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-20 17:49:45,982 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-20 17:49:45,982 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-20 17:49:45,983 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-20 17:49:45,983 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-20 17:49:45,983 INFO L153 SettingsManager]: * Use SBE=true [2024-11-20 17:49:45,984 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-20 17:49:45,984 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-20 17:49:45,984 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-20 17:49:45,984 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-20 17:49:45,984 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-20 17:49:45,985 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-20 17:49:45,988 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-20 17:49:45,988 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-20 17:49:45,988 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-20 17:49:45,988 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-20 17:49:45,988 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-20 17:49:45,989 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-20 17:49:45,989 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-20 17:49:45,989 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-20 17:49:45,989 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-20 17:49:45,990 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-20 17:49:45,990 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-20 17:49:45,990 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-20 17:49:45,990 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 17:49:45,991 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-20 17:49:45,991 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-20 17:49:45,991 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-20 17:49:45,991 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-20 17:49:45,992 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-20 17:49:45,993 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-20 17:49:45,993 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-20 17:49:45,993 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-20 17:49:45,994 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 670814d0a16da58b0f26835e20c05a244e2f373856f13b9d4ff2a931783edf81 [2024-11-20 17:49:46,259 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-20 17:49:46,285 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-20 17:49:46,288 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-20 17:49:46,290 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-20 17:49:46,290 INFO L274 PluginConnector]: CDTParser initialized [2024-11-20 17:49:46,291 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c [2024-11-20 17:49:47,736 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-20 17:49:47,939 INFO L384 CDTParser]: Found 1 translation units. [2024-11-20 17:49:47,940 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c [2024-11-20 17:49:47,953 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0f667fef/08987029af3d47aeb60d9eef18c61301/FLAG39c5dc127 [2024-11-20 17:49:47,970 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0f667fef/08987029af3d47aeb60d9eef18c61301 [2024-11-20 17:49:47,973 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-20 17:49:47,976 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-20 17:49:47,978 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-20 17:49:47,979 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-20 17:49:47,985 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-20 17:49:47,986 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:49:47" (1/1) ... [2024-11-20 17:49:47,986 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2fd9a49b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:49:47, skipping insertion in model container [2024-11-20 17:49:47,987 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:49:47" (1/1) ... [2024-11-20 17:49:48,010 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-20 17:49:48,248 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-20 17:49:48,254 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 17:49:48,265 INFO L200 MainTranslator]: Completed pre-run [2024-11-20 17:49:48,302 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 17:49:48,325 INFO L204 MainTranslator]: Completed translation [2024-11-20 17:49:48,326 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:49:48 WrapperNode [2024-11-20 17:49:48,326 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-20 17:49:48,327 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-20 17:49:48,328 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-20 17:49:48,328 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-20 17:49:48,334 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:49:48" (1/1) ... [2024-11-20 17:49:48,345 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:49:48" (1/1) ... [2024-11-20 17:49:48,383 INFO L138 Inliner]: procedures = 25, calls = 43, calls flagged for inlining = 15, calls inlined = 23, statements flattened = 224 [2024-11-20 17:49:48,387 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-20 17:49:48,388 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-20 17:49:48,388 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-20 17:49:48,388 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-20 17:49:48,399 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:49:48" (1/1) ... [2024-11-20 17:49:48,399 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:49:48" (1/1) ... [2024-11-20 17:49:48,407 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:49:48" (1/1) ... [2024-11-20 17:49:48,432 INFO L175 MemorySlicer]: Split 18 memory accesses to 2 slices as follows [2, 16]. 89 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 4 writes are split as follows [0, 4]. [2024-11-20 17:49:48,432 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:49:48" (1/1) ... [2024-11-20 17:49:48,433 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:49:48" (1/1) ... [2024-11-20 17:49:48,445 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:49:48" (1/1) ... [2024-11-20 17:49:48,450 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:49:48" (1/1) ... [2024-11-20 17:49:48,452 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:49:48" (1/1) ... [2024-11-20 17:49:48,454 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:49:48" (1/1) ... [2024-11-20 17:49:48,457 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-20 17:49:48,459 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-20 17:49:48,459 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-20 17:49:48,459 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-20 17:49:48,460 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:49:48" (1/1) ... [2024-11-20 17:49:48,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 17:49:48,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:49:48,499 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) [2024-11-20 17:49:48,501 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 [2024-11-20 17:49:48,545 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-20 17:49:48,546 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-20 17:49:48,546 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-20 17:49:48,546 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-20 17:49:48,546 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-20 17:49:48,547 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-20 17:49:48,547 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-20 17:49:48,547 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-20 17:49:48,547 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-20 17:49:48,547 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-20 17:49:48,547 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-20 17:49:48,548 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-20 17:49:48,548 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-20 17:49:48,548 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-20 17:49:48,548 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-20 17:49:48,548 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-20 17:49:48,549 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-20 17:49:48,549 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-20 17:49:48,551 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-20 17:49:48,661 INFO L238 CfgBuilder]: Building ICFG [2024-11-20 17:49:48,664 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-20 17:49:49,208 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-20 17:49:49,208 INFO L287 CfgBuilder]: Performing block encoding [2024-11-20 17:49:49,599 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-20 17:49:49,600 INFO L316 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-20 17:49:49,600 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:49:49 BoogieIcfgContainer [2024-11-20 17:49:49,601 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-20 17:49:49,603 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-20 17:49:49,603 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-20 17:49:49,607 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-20 17:49:49,607 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 05:49:47" (1/3) ... [2024-11-20 17:49:49,607 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ddb1bdf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:49:49, skipping insertion in model container [2024-11-20 17:49:49,608 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:49:48" (2/3) ... [2024-11-20 17:49:49,608 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ddb1bdf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:49:49, skipping insertion in model container [2024-11-20 17:49:49,608 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:49:49" (3/3) ... [2024-11-20 17:49:49,609 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-three-array-max.wvr.c [2024-11-20 17:49:49,629 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-20 17:49:49,629 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2024-11-20 17:49:49,629 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-20 17:49:49,713 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-20 17:49:49,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 90 places, 89 transitions, 199 flow [2024-11-20 17:49:49,797 INFO L124 PetriNetUnfolderBase]: 9/86 cut-off events. [2024-11-20 17:49:49,797 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-20 17:49:49,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 86 events. 9/86 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 235 event pairs, 0 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 67. Up to 2 conditions per place. [2024-11-20 17:49:49,802 INFO L82 GeneralOperation]: Start removeDead. Operand has 90 places, 89 transitions, 199 flow [2024-11-20 17:49:49,806 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 86 places, 85 transitions, 188 flow [2024-11-20 17:49:49,819 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-20 17:49:49,826 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;@618cbe66, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-20 17:49:49,827 INFO L334 AbstractCegarLoop]: Starting to check reachability of 55 error locations. [2024-11-20 17:49:49,829 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-20 17:49:49,830 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-20 17:49:49,830 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-20 17:49:49,830 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:49:49,831 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-20 17:49:49,831 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-20 17:49:49,836 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:49:49,837 INFO L85 PathProgramCache]: Analyzing trace with hash 904789, now seen corresponding path program 1 times [2024-11-20 17:49:49,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:49:49,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029228155] [2024-11-20 17:49:49,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:49:49,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:49:49,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:49:50,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:49:50,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:49:50,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029228155] [2024-11-20 17:49:50,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029228155] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:49:50,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:49:50,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-20 17:49:50,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363666038] [2024-11-20 17:49:50,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:49:50,197 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 17:49:50,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:49:50,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 17:49:50,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 17:49:50,284 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 89 [2024-11-20 17:49:50,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 85 transitions, 188 flow. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:49:50,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:49:50,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 89 [2024-11-20 17:49:50,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:49:50,930 INFO L124 PetriNetUnfolderBase]: 2958/4632 cut-off events. [2024-11-20 17:49:50,931 INFO L125 PetriNetUnfolderBase]: For 178/178 co-relation queries the response was YES. [2024-11-20 17:49:50,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8752 conditions, 4632 events. 2958/4632 cut-off events. For 178/178 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 29802 event pairs, 2134 based on Foata normal form. 1/3242 useless extension candidates. Maximal degree in co-relation 8216. Up to 3883 conditions per place. [2024-11-20 17:49:50,975 INFO L140 encePairwiseOnDemand]: 81/89 looper letters, 46 selfloop transitions, 2 changer transitions 0/78 dead transitions. [2024-11-20 17:49:50,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 78 transitions, 270 flow [2024-11-20 17:49:50,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 17:49:50,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 17:49:50,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 156 transitions. [2024-11-20 17:49:50,987 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5842696629213483 [2024-11-20 17:49:50,989 INFO L175 Difference]: Start difference. First operand has 86 places, 85 transitions, 188 flow. Second operand 3 states and 156 transitions. [2024-11-20 17:49:50,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 78 transitions, 270 flow [2024-11-20 17:49:50,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 78 transitions, 258 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-20 17:49:51,002 INFO L231 Difference]: Finished difference. Result has 75 places, 78 transitions, 166 flow [2024-11-20 17:49:51,004 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=75, PETRI_TRANSITIONS=78} [2024-11-20 17:49:51,009 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, -11 predicate places. [2024-11-20 17:49:51,010 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 78 transitions, 166 flow [2024-11-20 17:49:51,010 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:49:51,010 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:49:51,010 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-20 17:49:51,010 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-20 17:49:51,011 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-20 17:49:51,011 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:49:51,011 INFO L85 PathProgramCache]: Analyzing trace with hash 904790, now seen corresponding path program 1 times [2024-11-20 17:49:51,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:49:51,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899921287] [2024-11-20 17:49:51,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:49:51,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:49:51,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:49:51,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:49:51,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:49:51,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899921287] [2024-11-20 17:49:51,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899921287] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:49:51,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:49:51,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 17:49:51,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827386989] [2024-11-20 17:49:51,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:49:51,372 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 17:49:51,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:49:51,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 17:49:51,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-20 17:49:51,431 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 89 [2024-11-20 17:49:51,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 78 transitions, 166 flow. Second operand has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:49:51,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:49:51,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 89 [2024-11-20 17:49:51,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:49:51,847 INFO L124 PetriNetUnfolderBase]: 2958/4634 cut-off events. [2024-11-20 17:49:51,847 INFO L125 PetriNetUnfolderBase]: For 51/51 co-relation queries the response was YES. [2024-11-20 17:49:51,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8613 conditions, 4634 events. 2958/4634 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 29796 event pairs, 2134 based on Foata normal form. 0/3241 useless extension candidates. Maximal degree in co-relation 8578. Up to 3895 conditions per place. [2024-11-20 17:49:51,877 INFO L140 encePairwiseOnDemand]: 85/89 looper letters, 51 selfloop transitions, 2 changer transitions 0/80 dead transitions. [2024-11-20 17:49:51,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 80 transitions, 276 flow [2024-11-20 17:49:51,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 17:49:51,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 17:49:51,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 157 transitions. [2024-11-20 17:49:51,880 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5880149812734082 [2024-11-20 17:49:51,881 INFO L175 Difference]: Start difference. First operand has 75 places, 78 transitions, 166 flow. Second operand 3 states and 157 transitions. [2024-11-20 17:49:51,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 80 transitions, 276 flow [2024-11-20 17:49:51,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 80 transitions, 272 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 17:49:51,884 INFO L231 Difference]: Finished difference. Result has 76 places, 79 transitions, 176 flow [2024-11-20 17:49:51,884 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=76, PETRI_TRANSITIONS=79} [2024-11-20 17:49:51,885 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, -10 predicate places. [2024-11-20 17:49:51,885 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 79 transitions, 176 flow [2024-11-20 17:49:51,885 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:49:51,886 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:49:51,886 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-20 17:49:51,886 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-20 17:49:51,887 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-20 17:49:51,888 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:49:51,888 INFO L85 PathProgramCache]: Analyzing trace with hash 869532509, now seen corresponding path program 1 times [2024-11-20 17:49:51,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:49:51,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015351473] [2024-11-20 17:49:51,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:49:51,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:49:51,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:49:52,149 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:49:52,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:49:52,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015351473] [2024-11-20 17:49:52,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015351473] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:49:52,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405486134] [2024-11-20 17:49:52,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:49:52,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:49:52,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:49:52,154 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) [2024-11-20 17:49:52,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-20 17:49:52,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:49:52,230 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-20 17:49:52,235 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:49:52,316 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 [2024-11-20 17:49:52,486 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:49:52,486 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:49:52,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:49:52,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405486134] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:49:52,607 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:49:52,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-20 17:49:52,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779825779] [2024-11-20 17:49:52,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:49:52,608 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-20 17:49:52,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:49:52,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-20 17:49:52,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-11-20 17:49:52,892 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 89 [2024-11-20 17:49:52,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 79 transitions, 176 flow. Second operand has 11 states, 11 states have (on average 35.36363636363637) internal successors, (389), 11 states have internal predecessors, (389), 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) [2024-11-20 17:49:52,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:49:52,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 89 [2024-11-20 17:49:52,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:49:53,492 INFO L124 PetriNetUnfolderBase]: 2958/4633 cut-off events. [2024-11-20 17:49:53,493 INFO L125 PetriNetUnfolderBase]: For 51/51 co-relation queries the response was YES. [2024-11-20 17:49:53,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8615 conditions, 4633 events. 2958/4633 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 29832 event pairs, 2134 based on Foata normal form. 0/3241 useless extension candidates. Maximal degree in co-relation 8602. Up to 3891 conditions per place. [2024-11-20 17:49:53,522 INFO L140 encePairwiseOnDemand]: 84/89 looper letters, 47 selfloop transitions, 5 changer transitions 0/79 dead transitions. [2024-11-20 17:49:53,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 79 transitions, 278 flow [2024-11-20 17:49:53,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 17:49:53,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 17:49:53,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 223 transitions. [2024-11-20 17:49:53,525 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.501123595505618 [2024-11-20 17:49:53,525 INFO L175 Difference]: Start difference. First operand has 76 places, 79 transitions, 176 flow. Second operand 5 states and 223 transitions. [2024-11-20 17:49:53,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 79 transitions, 278 flow [2024-11-20 17:49:53,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 79 transitions, 276 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-20 17:49:53,527 INFO L231 Difference]: Finished difference. Result has 79 places, 79 transitions, 188 flow [2024-11-20 17:49:53,527 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=188, PETRI_PLACES=79, PETRI_TRANSITIONS=79} [2024-11-20 17:49:53,528 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, -7 predicate places. [2024-11-20 17:49:53,528 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 79 transitions, 188 flow [2024-11-20 17:49:53,529 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 35.36363636363637) internal successors, (389), 11 states have internal predecessors, (389), 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) [2024-11-20 17:49:53,529 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:49:53,529 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-20 17:49:53,538 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-20 17:49:53,733 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 [2024-11-20 17:49:53,734 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-20 17:49:53,734 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:49:53,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1185706500, now seen corresponding path program 1 times [2024-11-20 17:49:53,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:49:53,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735508771] [2024-11-20 17:49:53,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:49:53,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:49:53,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:49:53,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:49:53,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:49:53,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735508771] [2024-11-20 17:49:53,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735508771] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:49:53,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185025002] [2024-11-20 17:49:53,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:49:53,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:49:53,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:49:53,935 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) [2024-11-20 17:49:53,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-20 17:49:54,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:49:54,008 INFO L255 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-20 17:49:54,009 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:49:54,023 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 [2024-11-20 17:49:54,126 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-20 17:49:54,126 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 27 [2024-11-20 17:49:54,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:49:54,150 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:49:54,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:49:54,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185025002] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-20 17:49:54,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-20 17:49:54,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 3] total 9 [2024-11-20 17:49:54,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012957330] [2024-11-20 17:49:54,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:49:54,221 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 17:49:54,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:49:54,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 17:49:54,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-20 17:49:54,319 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 89 [2024-11-20 17:49:54,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 79 transitions, 188 flow. Second operand has 5 states, 5 states have (on average 35.2) internal successors, (176), 5 states have internal predecessors, (176), 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) [2024-11-20 17:49:54,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:49:54,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 89 [2024-11-20 17:49:54,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:49:54,747 INFO L124 PetriNetUnfolderBase]: 2960/4639 cut-off events. [2024-11-20 17:49:54,747 INFO L125 PetriNetUnfolderBase]: For 52/52 co-relation queries the response was YES. [2024-11-20 17:49:54,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8635 conditions, 4639 events. 2960/4639 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 29792 event pairs, 2134 based on Foata normal form. 0/3245 useless extension candidates. Maximal degree in co-relation 8606. Up to 3894 conditions per place. [2024-11-20 17:49:54,768 INFO L140 encePairwiseOnDemand]: 80/89 looper letters, 51 selfloop transitions, 7 changer transitions 0/85 dead transitions. [2024-11-20 17:49:54,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 85 transitions, 316 flow [2024-11-20 17:49:54,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 17:49:54,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 17:49:54,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 196 transitions. [2024-11-20 17:49:54,770 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.550561797752809 [2024-11-20 17:49:54,770 INFO L175 Difference]: Start difference. First operand has 79 places, 79 transitions, 188 flow. Second operand 4 states and 196 transitions. [2024-11-20 17:49:54,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 85 transitions, 316 flow [2024-11-20 17:49:54,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 85 transitions, 306 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-20 17:49:54,773 INFO L231 Difference]: Finished difference. Result has 81 places, 83 transitions, 225 flow [2024-11-20 17:49:54,773 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=225, PETRI_PLACES=81, PETRI_TRANSITIONS=83} [2024-11-20 17:49:54,774 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, -5 predicate places. [2024-11-20 17:49:54,775 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 83 transitions, 225 flow [2024-11-20 17:49:54,775 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 35.2) internal successors, (176), 5 states have internal predecessors, (176), 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) [2024-11-20 17:49:54,775 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:49:54,775 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:49:54,788 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-20 17:49:54,976 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,SelfDestructingSolverStorable3 [2024-11-20 17:49:54,976 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-20 17:49:54,977 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:49:54,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1897801947, now seen corresponding path program 1 times [2024-11-20 17:49:54,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:49:54,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221767723] [2024-11-20 17:49:54,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:49:54,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:49:54,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:49:55,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:49:55,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:49:55,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221767723] [2024-11-20 17:49:55,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221767723] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:49:55,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:49:55,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 17:49:55,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272983416] [2024-11-20 17:49:55,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:49:55,034 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 17:49:55,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:49:55,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 17:49:55,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 17:49:55,053 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 89 [2024-11-20 17:49:55,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 83 transitions, 225 flow. Second operand has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 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) [2024-11-20 17:49:55,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:49:55,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 89 [2024-11-20 17:49:55,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:49:55,420 INFO L124 PetriNetUnfolderBase]: 2958/4637 cut-off events. [2024-11-20 17:49:55,420 INFO L125 PetriNetUnfolderBase]: For 56/56 co-relation queries the response was YES. [2024-11-20 17:49:55,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8641 conditions, 4637 events. 2958/4637 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 29835 event pairs, 2134 based on Foata normal form. 2/3251 useless extension candidates. Maximal degree in co-relation 8611. Up to 3891 conditions per place. [2024-11-20 17:49:55,445 INFO L140 encePairwiseOnDemand]: 82/89 looper letters, 48 selfloop transitions, 6 changer transitions 0/83 dead transitions. [2024-11-20 17:49:55,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 83 transitions, 327 flow [2024-11-20 17:49:55,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 17:49:55,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 17:49:55,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 204 transitions. [2024-11-20 17:49:55,447 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5730337078651685 [2024-11-20 17:49:55,447 INFO L175 Difference]: Start difference. First operand has 81 places, 83 transitions, 225 flow. Second operand 4 states and 204 transitions. [2024-11-20 17:49:55,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 83 transitions, 327 flow [2024-11-20 17:49:55,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 83 transitions, 321 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 17:49:55,449 INFO L231 Difference]: Finished difference. Result has 82 places, 81 transitions, 221 flow [2024-11-20 17:49:55,449 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=221, PETRI_PLACES=82, PETRI_TRANSITIONS=81} [2024-11-20 17:49:55,450 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, -4 predicate places. [2024-11-20 17:49:55,450 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 81 transitions, 221 flow [2024-11-20 17:49:55,451 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 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) [2024-11-20 17:49:55,451 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:49:55,451 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-11-20 17:49:55,451 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-20 17:49:55,451 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-20 17:49:55,451 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:49:55,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1297642248, now seen corresponding path program 1 times [2024-11-20 17:49:55,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:49:55,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404174069] [2024-11-20 17:49:55,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:49:55,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:49:55,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:49:55,545 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:49:55,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:49:55,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404174069] [2024-11-20 17:49:55,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404174069] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:49:55,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249539589] [2024-11-20 17:49:55,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:49:55,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:49:55,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:49:55,549 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) [2024-11-20 17:49:55,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-20 17:49:55,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:49:55,612 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-20 17:49:55,613 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:49:55,675 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:49:55,676 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:49:55,723 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:49:55,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249539589] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:49:55,723 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:49:55,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-20 17:49:55,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706591560] [2024-11-20 17:49:55,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:49:55,725 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-20 17:49:55,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:49:55,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-20 17:49:55,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2024-11-20 17:49:55,832 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 89 [2024-11-20 17:49:55,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 81 transitions, 221 flow. Second operand has 13 states, 13 states have (on average 38.53846153846154) internal successors, (501), 13 states have internal predecessors, (501), 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) [2024-11-20 17:49:55,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:49:55,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 89 [2024-11-20 17:49:55,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:49:56,808 INFO L124 PetriNetUnfolderBase]: 5915/9273 cut-off events. [2024-11-20 17:49:56,808 INFO L125 PetriNetUnfolderBase]: For 113/113 co-relation queries the response was YES. [2024-11-20 17:49:56,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17276 conditions, 9273 events. 5915/9273 cut-off events. For 113/113 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 63404 event pairs, 4268 based on Foata normal form. 2/6508 useless extension candidates. Maximal degree in co-relation 8634. Up to 3889 conditions per place. [2024-11-20 17:49:56,871 INFO L140 encePairwiseOnDemand]: 79/89 looper letters, 85 selfloop transitions, 22 changer transitions 0/136 dead transitions. [2024-11-20 17:49:56,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 136 transitions, 592 flow [2024-11-20 17:49:56,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-20 17:49:56,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-20 17:49:56,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 405 transitions. [2024-11-20 17:49:56,873 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5688202247191011 [2024-11-20 17:49:56,873 INFO L175 Difference]: Start difference. First operand has 82 places, 81 transitions, 221 flow. Second operand 8 states and 405 transitions. [2024-11-20 17:49:56,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 136 transitions, 592 flow [2024-11-20 17:49:56,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 136 transitions, 570 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-20 17:49:56,878 INFO L231 Difference]: Finished difference. Result has 88 places, 94 transitions, 338 flow [2024-11-20 17:49:56,878 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=338, PETRI_PLACES=88, PETRI_TRANSITIONS=94} [2024-11-20 17:49:56,880 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 2 predicate places. [2024-11-20 17:49:56,880 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 94 transitions, 338 flow [2024-11-20 17:49:56,881 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 38.53846153846154) internal successors, (501), 13 states have internal predecessors, (501), 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) [2024-11-20 17:49:56,881 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:49:56,881 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1] [2024-11-20 17:49:56,892 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-20 17:49:57,085 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:49:57,086 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-20 17:49:57,086 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:49:57,087 INFO L85 PathProgramCache]: Analyzing trace with hash 35474017, now seen corresponding path program 2 times [2024-11-20 17:49:57,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:49:57,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985882397] [2024-11-20 17:49:57,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:49:57,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:49:57,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:49:57,342 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:49:57,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:49:57,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985882397] [2024-11-20 17:49:57,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985882397] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:49:57,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488398192] [2024-11-20 17:49:57,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 17:49:57,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:49:57,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:49:57,344 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) [2024-11-20 17:49:57,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-20 17:49:57,408 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 17:49:57,408 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:49:57,409 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-20 17:49:57,411 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:49:57,422 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 [2024-11-20 17:49:57,548 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-20 17:49:57,549 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 27 [2024-11-20 17:49:57,619 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:49:57,619 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:49:57,771 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:49:57,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488398192] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:49:57,771 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:49:57,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 17 [2024-11-20 17:49:57,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517004126] [2024-11-20 17:49:57,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:49:57,772 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-20 17:49:57,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:49:57,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-20 17:49:57,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2024-11-20 17:49:58,829 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 89 [2024-11-20 17:49:58,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 94 transitions, 338 flow. Second operand has 19 states, 19 states have (on average 35.578947368421055) internal successors, (676), 19 states have internal predecessors, (676), 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) [2024-11-20 17:49:58,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:49:58,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 89 [2024-11-20 17:49:58,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:50:00,349 INFO L124 PetriNetUnfolderBase]: 5916/9288 cut-off events. [2024-11-20 17:50:00,350 INFO L125 PetriNetUnfolderBase]: For 122/122 co-relation queries the response was YES. [2024-11-20 17:50:00,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17381 conditions, 9288 events. 5916/9288 cut-off events. For 122/122 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 63466 event pairs, 4268 based on Foata normal form. 8/6529 useless extension candidates. Maximal degree in co-relation 8691. Up to 3894 conditions per place. [2024-11-20 17:50:00,407 INFO L140 encePairwiseOnDemand]: 79/89 looper letters, 101 selfloop transitions, 25 changer transitions 0/153 dead transitions. [2024-11-20 17:50:00,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 153 transitions, 807 flow [2024-11-20 17:50:00,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-20 17:50:00,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-20 17:50:00,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 542 transitions. [2024-11-20 17:50:00,410 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5074906367041199 [2024-11-20 17:50:00,410 INFO L175 Difference]: Start difference. First operand has 88 places, 94 transitions, 338 flow. Second operand 12 states and 542 transitions. [2024-11-20 17:50:00,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 153 transitions, 807 flow [2024-11-20 17:50:00,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 153 transitions, 779 flow, removed 7 selfloop flow, removed 1 redundant places. [2024-11-20 17:50:00,416 INFO L231 Difference]: Finished difference. Result has 101 places, 102 transitions, 456 flow [2024-11-20 17:50:00,417 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=307, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=456, PETRI_PLACES=101, PETRI_TRANSITIONS=102} [2024-11-20 17:50:00,417 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 15 predicate places. [2024-11-20 17:50:00,418 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 102 transitions, 456 flow [2024-11-20 17:50:00,418 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 35.578947368421055) internal successors, (676), 19 states have internal predecessors, (676), 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) [2024-11-20 17:50:00,418 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:50:00,418 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:50:00,428 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-20 17:50:00,619 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:50:00,619 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-20 17:50:00,620 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:50:00,620 INFO L85 PathProgramCache]: Analyzing trace with hash -938285925, now seen corresponding path program 1 times [2024-11-20 17:50:00,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:50:00,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523416822] [2024-11-20 17:50:00,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:50:00,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:50:00,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:50:00,801 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:50:00,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:50:00,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523416822] [2024-11-20 17:50:00,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523416822] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:50:00,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:50:00,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 17:50:00,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834163868] [2024-11-20 17:50:00,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:50:00,803 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 17:50:00,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:50:00,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 17:50:00,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-20 17:50:00,871 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 89 [2024-11-20 17:50:00,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 102 transitions, 456 flow. Second operand has 5 states, 5 states have (on average 30.2) internal successors, (151), 5 states have internal predecessors, (151), 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) [2024-11-20 17:50:00,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:50:00,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 89 [2024-11-20 17:50:00,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:50:01,639 INFO L124 PetriNetUnfolderBase]: 5982/9620 cut-off events. [2024-11-20 17:50:01,639 INFO L125 PetriNetUnfolderBase]: For 146/146 co-relation queries the response was YES. [2024-11-20 17:50:01,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17860 conditions, 9620 events. 5982/9620 cut-off events. For 146/146 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 65788 event pairs, 4376 based on Foata normal form. 0/6848 useless extension candidates. Maximal degree in co-relation 17804. Up to 7873 conditions per place. [2024-11-20 17:50:01,689 INFO L140 encePairwiseOnDemand]: 81/89 looper letters, 67 selfloop transitions, 7 changer transitions 0/97 dead transitions. [2024-11-20 17:50:01,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 97 transitions, 594 flow [2024-11-20 17:50:01,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 17:50:01,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 17:50:01,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 194 transitions. [2024-11-20 17:50:01,691 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43595505617977526 [2024-11-20 17:50:01,691 INFO L175 Difference]: Start difference. First operand has 101 places, 102 transitions, 456 flow. Second operand 5 states and 194 transitions. [2024-11-20 17:50:01,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 97 transitions, 594 flow [2024-11-20 17:50:01,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 97 transitions, 561 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-11-20 17:50:01,694 INFO L231 Difference]: Finished difference. Result has 95 places, 97 transitions, 427 flow [2024-11-20 17:50:01,694 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=413, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=427, PETRI_PLACES=95, PETRI_TRANSITIONS=97} [2024-11-20 17:50:01,695 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 9 predicate places. [2024-11-20 17:50:01,695 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 97 transitions, 427 flow [2024-11-20 17:50:01,696 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.2) internal successors, (151), 5 states have internal predecessors, (151), 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) [2024-11-20 17:50:01,696 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:50:01,696 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:50:01,696 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-20 17:50:01,696 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-20 17:50:01,697 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:50:01,697 INFO L85 PathProgramCache]: Analyzing trace with hash -938285924, now seen corresponding path program 1 times [2024-11-20 17:50:01,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:50:01,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091699609] [2024-11-20 17:50:01,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:50:01,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:50:01,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:50:02,039 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:50:02,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:50:02,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091699609] [2024-11-20 17:50:02,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091699609] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:50:02,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381267669] [2024-11-20 17:50:02,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:50:02,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:50:02,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:50:02,043 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) [2024-11-20 17:50:02,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-20 17:50:02,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:50:02,118 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-20 17:50:02,119 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:50:02,130 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 [2024-11-20 17:50:02,135 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 [2024-11-20 17:50:02,180 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-20 17:50:02,180 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 [2024-11-20 17:50:02,192 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-20 17:50:02,306 INFO L349 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2024-11-20 17:50:02,306 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2024-11-20 17:50:02,598 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:50:02,599 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:50:02,947 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:50:02,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381267669] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-20 17:50:02,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-20 17:50:02,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 12 [2024-11-20 17:50:02,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359394123] [2024-11-20 17:50:02,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:50:02,948 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-20 17:50:02,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:50:02,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-20 17:50:02,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2024-11-20 17:50:03,198 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 89 [2024-11-20 17:50:03,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 97 transitions, 427 flow. Second operand has 6 states, 6 states have (on average 35.833333333333336) internal successors, (215), 6 states have internal predecessors, (215), 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) [2024-11-20 17:50:03,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:50:03,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 89 [2024-11-20 17:50:03,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:50:11,411 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] [2024-11-20 17:50:15,415 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-20 17:50:19,434 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-20 17:50:23,438 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-20 17:50:27,441 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-20 17:50:31,448 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-20 17:50:35,504 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-20 17:50:39,507 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-20 17:50:43,513 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-20 17:50:47,517 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-20 17:50:51,535 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-20 17:50:55,561 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-20 17:50:59,583 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-20 17:51:03,797 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] [2024-11-20 17:51:04,144 INFO L124 PetriNetUnfolderBase]: 5330/8368 cut-off events. [2024-11-20 17:51:04,145 INFO L125 PetriNetUnfolderBase]: For 134/134 co-relation queries the response was YES. [2024-11-20 17:51:04,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15706 conditions, 8368 events. 5330/8368 cut-off events. For 134/134 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 56651 event pairs, 3824 based on Foata normal form. 0/5958 useless extension candidates. Maximal degree in co-relation 15652. Up to 7001 conditions per place. [2024-11-20 17:51:04,197 INFO L140 encePairwiseOnDemand]: 83/89 looper letters, 64 selfloop transitions, 10 changer transitions 0/96 dead transitions. [2024-11-20 17:51:04,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 96 transitions, 577 flow [2024-11-20 17:51:04,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-20 17:51:04,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-20 17:51:04,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 256 transitions. [2024-11-20 17:51:04,200 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4794007490636704 [2024-11-20 17:51:04,200 INFO L175 Difference]: Start difference. First operand has 95 places, 97 transitions, 427 flow. Second operand 6 states and 256 transitions. [2024-11-20 17:51:04,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 96 transitions, 577 flow [2024-11-20 17:51:04,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 96 transitions, 566 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-20 17:51:04,204 INFO L231 Difference]: Finished difference. Result has 95 places, 95 transitions, 432 flow [2024-11-20 17:51:04,204 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=412, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=432, PETRI_PLACES=95, PETRI_TRANSITIONS=95} [2024-11-20 17:51:04,205 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 9 predicate places. [2024-11-20 17:51:04,205 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 95 transitions, 432 flow [2024-11-20 17:51:04,205 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 35.833333333333336) internal successors, (215), 6 states have internal predecessors, (215), 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) [2024-11-20 17:51:04,205 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:51:04,205 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1] [2024-11-20 17:51:04,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-20 17:51:04,409 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:51:04,410 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-20 17:51:04,410 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:51:04,410 INFO L85 PathProgramCache]: Analyzing trace with hash -269178843, now seen corresponding path program 3 times [2024-11-20 17:51:04,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:51:04,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487538916] [2024-11-20 17:51:04,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:51:04,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:51:04,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:51:04,569 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:51:04,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:51:04,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487538916] [2024-11-20 17:51:04,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487538916] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:51:04,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655195775] [2024-11-20 17:51:04,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-20 17:51:04,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:51:04,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:51:04,573 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:51:04,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-20 17:51:04,653 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-20 17:51:04,653 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:51:04,654 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-20 17:51:04,656 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:51:04,665 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 [2024-11-20 17:51:04,757 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-20 17:51:04,758 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 24 [2024-11-20 17:51:04,850 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-20 17:51:04,850 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:51:05,025 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-20 17:51:05,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655195775] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:51:05,025 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:51:05,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 17 [2024-11-20 17:51:05,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489772787] [2024-11-20 17:51:05,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:51:05,026 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-20 17:51:05,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:51:05,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-20 17:51:05,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2024-11-20 17:51:05,729 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 89 [2024-11-20 17:51:05,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 95 transitions, 432 flow. Second operand has 18 states, 18 states have (on average 35.77777777777778) internal successors, (644), 18 states have internal predecessors, (644), 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) [2024-11-20 17:51:05,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:51:05,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 89 [2024-11-20 17:51:05,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:51:07,093 INFO L124 PetriNetUnfolderBase]: 5330/8366 cut-off events. [2024-11-20 17:51:07,093 INFO L125 PetriNetUnfolderBase]: For 139/139 co-relation queries the response was YES. [2024-11-20 17:51:07,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15706 conditions, 8366 events. 5330/8366 cut-off events. For 139/139 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 56669 event pairs, 3824 based on Foata normal form. 6/5962 useless extension candidates. Maximal degree in co-relation 15603. Up to 7000 conditions per place. [2024-11-20 17:51:07,138 INFO L140 encePairwiseOnDemand]: 77/89 looper letters, 38 selfloop transitions, 47 changer transitions 0/106 dead transitions. [2024-11-20 17:51:07,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 106 transitions, 670 flow [2024-11-20 17:51:07,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-20 17:51:07,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-20 17:51:07,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 737 transitions. [2024-11-20 17:51:07,142 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4358367829686576 [2024-11-20 17:51:07,142 INFO L175 Difference]: Start difference. First operand has 95 places, 95 transitions, 432 flow. Second operand 19 states and 737 transitions. [2024-11-20 17:51:07,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 106 transitions, 670 flow [2024-11-20 17:51:07,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 106 transitions, 627 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-11-20 17:51:07,145 INFO L231 Difference]: Finished difference. Result has 105 places, 106 transitions, 551 flow [2024-11-20 17:51:07,146 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=375, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=551, PETRI_PLACES=105, PETRI_TRANSITIONS=106} [2024-11-20 17:51:07,146 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 19 predicate places. [2024-11-20 17:51:07,146 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 106 transitions, 551 flow [2024-11-20 17:51:07,147 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 35.77777777777778) internal successors, (644), 18 states have internal predecessors, (644), 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) [2024-11-20 17:51:07,147 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:51:07,147 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:51:07,155 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-20 17:51:07,351 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:51:07,352 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-20 17:51:07,352 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:51:07,352 INFO L85 PathProgramCache]: Analyzing trace with hash 977908366, now seen corresponding path program 1 times [2024-11-20 17:51:07,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:51:07,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323263148] [2024-11-20 17:51:07,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:51:07,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:51:07,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:51:07,438 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:51:07,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:51:07,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323263148] [2024-11-20 17:51:07,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323263148] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:51:07,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:51:07,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 17:51:07,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572603202] [2024-11-20 17:51:07,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:51:07,439 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 17:51:07,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:51:07,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 17:51:07,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-20 17:51:07,508 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 89 [2024-11-20 17:51:07,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 106 transitions, 551 flow. Second operand has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 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) [2024-11-20 17:51:07,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:51:07,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 89 [2024-11-20 17:51:07,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:51:07,943 INFO L124 PetriNetUnfolderBase]: 5420/8478 cut-off events. [2024-11-20 17:51:07,943 INFO L125 PetriNetUnfolderBase]: For 106/106 co-relation queries the response was YES. [2024-11-20 17:51:07,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16017 conditions, 8478 events. 5420/8478 cut-off events. For 106/106 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 54928 event pairs, 3956 based on Foata normal form. 0/6200 useless extension candidates. Maximal degree in co-relation 7929. Up to 7170 conditions per place. [2024-11-20 17:51:07,985 INFO L140 encePairwiseOnDemand]: 81/89 looper letters, 76 selfloop transitions, 9 changer transitions 0/101 dead transitions. [2024-11-20 17:51:07,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 101 transitions, 711 flow [2024-11-20 17:51:07,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 17:51:07,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 17:51:07,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 197 transitions. [2024-11-20 17:51:07,986 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44269662921348313 [2024-11-20 17:51:07,986 INFO L175 Difference]: Start difference. First operand has 105 places, 106 transitions, 551 flow. Second operand 5 states and 197 transitions. [2024-11-20 17:51:07,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 101 transitions, 711 flow [2024-11-20 17:51:07,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 101 transitions, 533 flow, removed 27 selfloop flow, removed 13 redundant places. [2024-11-20 17:51:07,989 INFO L231 Difference]: Finished difference. Result has 91 places, 101 transitions, 381 flow [2024-11-20 17:51:07,989 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=363, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=381, PETRI_PLACES=91, PETRI_TRANSITIONS=101} [2024-11-20 17:51:07,990 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 5 predicate places. [2024-11-20 17:51:07,990 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 101 transitions, 381 flow [2024-11-20 17:51:07,990 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 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) [2024-11-20 17:51:07,990 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:51:07,990 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:51:07,990 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-20 17:51:07,991 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-20 17:51:07,991 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:51:07,991 INFO L85 PathProgramCache]: Analyzing trace with hash 977908367, now seen corresponding path program 1 times [2024-11-20 17:51:07,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:51:07,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303113275] [2024-11-20 17:51:07,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:51:07,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:51:08,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:51:08,178 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:51:08,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:51:08,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303113275] [2024-11-20 17:51:08,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303113275] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:51:08,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481904762] [2024-11-20 17:51:08,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:51:08,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:51:08,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:51:08,182 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:51:08,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-20 17:51:08,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:51:08,260 INFO L255 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-20 17:51:08,261 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:51:08,268 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 [2024-11-20 17:51:08,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 17:51:08,310 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-20 17:51:08,317 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-20 17:51:08,317 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 [2024-11-20 17:51:08,342 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:51:08,342 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:51:08,405 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2024-11-20 17:51:08,459 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:51:08,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481904762] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:51:08,460 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:51:08,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2024-11-20 17:51:08,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983705494] [2024-11-20 17:51:08,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:51:08,460 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-20 17:51:08,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:51:08,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-20 17:51:08,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-11-20 17:51:08,829 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 89 [2024-11-20 17:51:08,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 101 transitions, 381 flow. Second operand has 10 states, 10 states have (on average 34.5) internal successors, (345), 10 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:51:08,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:51:08,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 89 [2024-11-20 17:51:08,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:51:09,363 INFO L124 PetriNetUnfolderBase]: 4744/7446 cut-off events. [2024-11-20 17:51:09,363 INFO L125 PetriNetUnfolderBase]: For 84/84 co-relation queries the response was YES. [2024-11-20 17:51:09,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13947 conditions, 7446 events. 4744/7446 cut-off events. For 84/84 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 48817 event pairs, 3380 based on Foata normal form. 0/5397 useless extension candidates. Maximal degree in co-relation 6912. Up to 6234 conditions per place. [2024-11-20 17:51:09,388 INFO L140 encePairwiseOnDemand]: 80/89 looper letters, 65 selfloop transitions, 19 changer transitions 0/99 dead transitions. [2024-11-20 17:51:09,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 99 transitions, 545 flow [2024-11-20 17:51:09,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-20 17:51:09,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-20 17:51:09,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 310 transitions. [2024-11-20 17:51:09,389 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4353932584269663 [2024-11-20 17:51:09,390 INFO L175 Difference]: Start difference. First operand has 91 places, 101 transitions, 381 flow. Second operand 8 states and 310 transitions. [2024-11-20 17:51:09,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 99 transitions, 545 flow [2024-11-20 17:51:09,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 99 transitions, 531 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-20 17:51:09,392 INFO L231 Difference]: Finished difference. Result has 93 places, 99 transitions, 401 flow [2024-11-20 17:51:09,392 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=363, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=401, PETRI_PLACES=93, PETRI_TRANSITIONS=99} [2024-11-20 17:51:09,394 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 7 predicate places. [2024-11-20 17:51:09,394 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 99 transitions, 401 flow [2024-11-20 17:51:09,394 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 34.5) internal successors, (345), 10 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:51:09,394 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:51:09,394 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:51:09,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-20 17:51:09,594 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:51:09,595 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-20 17:51:09,595 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:51:09,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1136642886, now seen corresponding path program 1 times [2024-11-20 17:51:09,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:51:09,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293089656] [2024-11-20 17:51:09,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:51:09,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:51:09,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:51:09,694 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:51:09,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:51:09,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293089656] [2024-11-20 17:51:09,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293089656] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:51:09,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135503556] [2024-11-20 17:51:09,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:51:09,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:51:09,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:51:09,697 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:51:09,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-20 17:51:09,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:51:09,780 INFO L255 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-20 17:51:09,781 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:51:09,829 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:51:09,830 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:51:09,881 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:51:09,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135503556] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:51:09,881 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:51:09,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-11-20 17:51:09,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599069580] [2024-11-20 17:51:09,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:51:09,882 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-20 17:51:09,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:51:09,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-20 17:51:09,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2024-11-20 17:51:09,975 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 89 [2024-11-20 17:51:09,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 99 transitions, 401 flow. Second operand has 12 states, 12 states have (on average 38.333333333333336) internal successors, (460), 12 states have internal predecessors, (460), 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) [2024-11-20 17:51:09,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:51:09,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 89 [2024-11-20 17:51:09,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:51:10,393 INFO L124 PetriNetUnfolderBase]: 3556/5670 cut-off events. [2024-11-20 17:51:10,393 INFO L125 PetriNetUnfolderBase]: For 91/91 co-relation queries the response was YES. [2024-11-20 17:51:10,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10692 conditions, 5670 events. 3556/5670 cut-off events. For 91/91 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 35282 event pairs, 2404 based on Foata normal form. 0/4074 useless extension candidates. Maximal degree in co-relation 7786. Up to 3518 conditions per place. [2024-11-20 17:51:10,416 INFO L140 encePairwiseOnDemand]: 76/89 looper letters, 98 selfloop transitions, 35 changer transitions 0/147 dead transitions. [2024-11-20 17:51:10,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 147 transitions, 771 flow [2024-11-20 17:51:10,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-20 17:51:10,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-20 17:51:10,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 439 transitions. [2024-11-20 17:51:10,418 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5480649188514357 [2024-11-20 17:51:10,418 INFO L175 Difference]: Start difference. First operand has 93 places, 99 transitions, 401 flow. Second operand 9 states and 439 transitions. [2024-11-20 17:51:10,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 147 transitions, 771 flow [2024-11-20 17:51:10,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 147 transitions, 762 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-20 17:51:10,421 INFO L231 Difference]: Finished difference. Result has 100 places, 101 transitions, 477 flow [2024-11-20 17:51:10,421 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=392, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=477, PETRI_PLACES=100, PETRI_TRANSITIONS=101} [2024-11-20 17:51:10,422 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 14 predicate places. [2024-11-20 17:51:10,422 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 101 transitions, 477 flow [2024-11-20 17:51:10,422 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 38.333333333333336) internal successors, (460), 12 states have internal predecessors, (460), 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) [2024-11-20 17:51:10,422 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:51:10,422 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:51:10,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-20 17:51:10,626 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-20 17:51:10,627 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-20 17:51:10,627 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:51:10,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1465569679, now seen corresponding path program 1 times [2024-11-20 17:51:10,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:51:10,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619047334] [2024-11-20 17:51:10,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:51:10,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:51:10,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:51:10,735 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:51:10,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:51:10,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619047334] [2024-11-20 17:51:10,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619047334] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:51:10,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150865357] [2024-11-20 17:51:10,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:51:10,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:51:10,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:51:10,738 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:51:10,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-20 17:51:10,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:51:10,833 INFO L255 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-20 17:51:10,834 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:51:10,883 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:51:10,883 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:51:10,930 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:51:10,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150865357] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:51:10,930 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:51:10,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-11-20 17:51:10,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261527682] [2024-11-20 17:51:10,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:51:10,931 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-20 17:51:10,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:51:10,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-20 17:51:10,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2024-11-20 17:51:10,983 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 89 [2024-11-20 17:51:10,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 101 transitions, 477 flow. Second operand has 12 states, 12 states have (on average 38.583333333333336) internal successors, (463), 12 states have internal predecessors, (463), 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) [2024-11-20 17:51:10,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:51:10,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 89 [2024-11-20 17:51:10,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:51:11,357 INFO L124 PetriNetUnfolderBase]: 2958/4705 cut-off events. [2024-11-20 17:51:11,358 INFO L125 PetriNetUnfolderBase]: For 604/730 co-relation queries the response was YES. [2024-11-20 17:51:11,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9357 conditions, 4705 events. 2958/4705 cut-off events. For 604/730 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 27312 event pairs, 2062 based on Foata normal form. 0/3451 useless extension candidates. Maximal degree in co-relation 8014. Up to 3513 conditions per place. [2024-11-20 17:51:11,375 INFO L140 encePairwiseOnDemand]: 76/89 looper letters, 85 selfloop transitions, 35 changer transitions 0/134 dead transitions. [2024-11-20 17:51:11,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 134 transitions, 799 flow [2024-11-20 17:51:11,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-20 17:51:11,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-20 17:51:11,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 426 transitions. [2024-11-20 17:51:11,377 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5318352059925093 [2024-11-20 17:51:11,378 INFO L175 Difference]: Start difference. First operand has 100 places, 101 transitions, 477 flow. Second operand 9 states and 426 transitions. [2024-11-20 17:51:11,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 134 transitions, 799 flow [2024-11-20 17:51:11,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 134 transitions, 734 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-20 17:51:11,381 INFO L231 Difference]: Finished difference. Result has 104 places, 103 transitions, 497 flow [2024-11-20 17:51:11,381 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=412, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=497, PETRI_PLACES=104, PETRI_TRANSITIONS=103} [2024-11-20 17:51:11,382 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 18 predicate places. [2024-11-20 17:51:11,382 INFO L471 AbstractCegarLoop]: Abstraction has has 104 places, 103 transitions, 497 flow [2024-11-20 17:51:11,382 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 38.583333333333336) internal successors, (463), 12 states have internal predecessors, (463), 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) [2024-11-20 17:51:11,382 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:51:11,382 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:51:11,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-20 17:51:11,582 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-20 17:51:11,583 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-20 17:51:11,583 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:51:11,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1263889248, now seen corresponding path program 1 times [2024-11-20 17:51:11,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:51:11,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249767181] [2024-11-20 17:51:11,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:51:11,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:51:11,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:51:11,669 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:51:11,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:51:11,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249767181] [2024-11-20 17:51:11,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249767181] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:51:11,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:51:11,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 17:51:11,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096656672] [2024-11-20 17:51:11,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:51:11,672 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 17:51:11,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:51:11,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 17:51:11,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 17:51:11,715 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 89 [2024-11-20 17:51:11,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 103 transitions, 497 flow. Second operand has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 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) [2024-11-20 17:51:11,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:51:11,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 89 [2024-11-20 17:51:11,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:51:11,941 INFO L124 PetriNetUnfolderBase]: 2202/3409 cut-off events. [2024-11-20 17:51:11,941 INFO L125 PetriNetUnfolderBase]: For 816/902 co-relation queries the response was YES. [2024-11-20 17:51:11,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7476 conditions, 3409 events. 2202/3409 cut-off events. For 816/902 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 18688 event pairs, 1661 based on Foata normal form. 0/2664 useless extension candidates. Maximal degree in co-relation 6119. Up to 2983 conditions per place. [2024-11-20 17:51:11,956 INFO L140 encePairwiseOnDemand]: 85/89 looper letters, 81 selfloop transitions, 5 changer transitions 0/101 dead transitions. [2024-11-20 17:51:11,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 101 transitions, 665 flow [2024-11-20 17:51:11,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 17:51:11,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 17:51:11,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 182 transitions. [2024-11-20 17:51:11,957 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5112359550561798 [2024-11-20 17:51:11,957 INFO L175 Difference]: Start difference. First operand has 104 places, 103 transitions, 497 flow. Second operand 4 states and 182 transitions. [2024-11-20 17:51:11,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 101 transitions, 665 flow [2024-11-20 17:51:11,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 101 transitions, 600 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-20 17:51:11,965 INFO L231 Difference]: Finished difference. Result has 99 places, 101 transitions, 438 flow [2024-11-20 17:51:11,965 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=428, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=438, PETRI_PLACES=99, PETRI_TRANSITIONS=101} [2024-11-20 17:51:11,965 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 13 predicate places. [2024-11-20 17:51:11,965 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 101 transitions, 438 flow [2024-11-20 17:51:11,966 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 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) [2024-11-20 17:51:11,966 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:51:11,966 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:51:11,966 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-20 17:51:11,966 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-20 17:51:11,966 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:51:11,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1263889247, now seen corresponding path program 1 times [2024-11-20 17:51:11,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:51:11,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894299124] [2024-11-20 17:51:11,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:51:11,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:51:11,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:51:12,067 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:51:12,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:51:12,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894299124] [2024-11-20 17:51:12,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894299124] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:51:12,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270330130] [2024-11-20 17:51:12,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:51:12,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:51:12,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:51:12,071 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:51:12,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-20 17:51:12,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:51:12,166 INFO L255 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-20 17:51:12,167 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:51:12,215 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:51:12,216 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:51:12,266 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:51:12,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270330130] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:51:12,267 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:51:12,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-11-20 17:51:12,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707466186] [2024-11-20 17:51:12,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:51:12,268 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-20 17:51:12,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:51:12,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-20 17:51:12,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2024-11-20 17:51:12,345 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 89 [2024-11-20 17:51:12,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 101 transitions, 438 flow. Second operand has 12 states, 12 states have (on average 38.75) internal successors, (465), 12 states have internal predecessors, (465), 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) [2024-11-20 17:51:12,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:51:12,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 89 [2024-11-20 17:51:12,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:51:12,648 INFO L124 PetriNetUnfolderBase]: 2206/3416 cut-off events. [2024-11-20 17:51:12,648 INFO L125 PetriNetUnfolderBase]: For 737/926 co-relation queries the response was YES. [2024-11-20 17:51:12,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7231 conditions, 3416 events. 2206/3416 cut-off events. For 737/926 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 19040 event pairs, 1283 based on Foata normal form. 0/2572 useless extension candidates. Maximal degree in co-relation 6392. Up to 2351 conditions per place. [2024-11-20 17:51:12,660 INFO L140 encePairwiseOnDemand]: 76/89 looper letters, 93 selfloop transitions, 35 changer transitions 0/142 dead transitions. [2024-11-20 17:51:12,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 142 transitions, 810 flow [2024-11-20 17:51:12,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-20 17:51:12,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-20 17:51:12,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 470 transitions. [2024-11-20 17:51:12,661 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5280898876404494 [2024-11-20 17:51:12,661 INFO L175 Difference]: Start difference. First operand has 99 places, 101 transitions, 438 flow. Second operand 10 states and 470 transitions. [2024-11-20 17:51:12,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 142 transitions, 810 flow [2024-11-20 17:51:12,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 142 transitions, 804 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 17:51:12,666 INFO L231 Difference]: Finished difference. Result has 109 places, 103 transitions, 539 flow [2024-11-20 17:51:12,666 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=432, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=539, PETRI_PLACES=109, PETRI_TRANSITIONS=103} [2024-11-20 17:51:12,666 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 23 predicate places. [2024-11-20 17:51:12,666 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 103 transitions, 539 flow [2024-11-20 17:51:12,667 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 38.75) internal successors, (465), 12 states have internal predecessors, (465), 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) [2024-11-20 17:51:12,667 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:51:12,667 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:51:12,675 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-20 17:51:12,870 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-20 17:51:12,871 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-20 17:51:12,871 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:51:12,871 INFO L85 PathProgramCache]: Analyzing trace with hash -2069704291, now seen corresponding path program 2 times [2024-11-20 17:51:12,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:51:12,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111735170] [2024-11-20 17:51:12,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:51:12,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:51:12,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:51:13,401 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-20 17:51:13,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:51:13,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111735170] [2024-11-20 17:51:13,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111735170] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:51:13,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773435643] [2024-11-20 17:51:13,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 17:51:13,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:51:13,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:51:13,404 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:51:13,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-20 17:51:13,491 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-20 17:51:13,491 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:51:13,493 INFO L255 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-11-20 17:51:13,496 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:51:13,507 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-20 17:51:13,587 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-20 17:51:13,587 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 22 [2024-11-20 17:51:13,596 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 [2024-11-20 17:51:13,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 17:51:13,749 INFO L349 Elim1Store]: treesize reduction 27, result has 15.6 percent of original size [2024-11-20 17:51:13,749 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 34 [2024-11-20 17:51:13,766 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-20 17:51:13,766 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 [2024-11-20 17:51:14,243 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-20 17:51:14,244 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-20 17:51:14,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773435643] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:51:14,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-20 17:51:14,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 15 [2024-11-20 17:51:14,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210791296] [2024-11-20 17:51:14,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:51:14,245 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-20 17:51:14,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:51:14,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-20 17:51:14,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2024-11-20 17:51:14,679 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 89 [2024-11-20 17:51:14,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 103 transitions, 539 flow. Second operand has 8 states, 8 states have (on average 28.25) internal successors, (226), 8 states have internal predecessors, (226), 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) [2024-11-20 17:51:14,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:51:14,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 89 [2024-11-20 17:51:14,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:51:15,542 INFO L124 PetriNetUnfolderBase]: 4627/6973 cut-off events. [2024-11-20 17:51:15,542 INFO L125 PetriNetUnfolderBase]: For 1499/1761 co-relation queries the response was YES. [2024-11-20 17:51:15,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15631 conditions, 6973 events. 4627/6973 cut-off events. For 1499/1761 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 39880 event pairs, 1614 based on Foata normal form. 0/5401 useless extension candidates. Maximal degree in co-relation 14685. Up to 3800 conditions per place. [2024-11-20 17:51:15,636 INFO L140 encePairwiseOnDemand]: 77/89 looper letters, 119 selfloop transitions, 21 changer transitions 0/149 dead transitions. [2024-11-20 17:51:15,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 149 transitions, 951 flow [2024-11-20 17:51:15,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-20 17:51:15,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-20 17:51:15,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 333 transitions. [2024-11-20 17:51:15,638 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4157303370786517 [2024-11-20 17:51:15,638 INFO L175 Difference]: Start difference. First operand has 109 places, 103 transitions, 539 flow. Second operand 9 states and 333 transitions. [2024-11-20 17:51:15,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 149 transitions, 951 flow [2024-11-20 17:51:15,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 149 transitions, 909 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-20 17:51:15,643 INFO L231 Difference]: Finished difference. Result has 113 places, 105 transitions, 564 flow [2024-11-20 17:51:15,644 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=495, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=564, PETRI_PLACES=113, PETRI_TRANSITIONS=105} [2024-11-20 17:51:15,644 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 27 predicate places. [2024-11-20 17:51:15,644 INFO L471 AbstractCegarLoop]: Abstraction has has 113 places, 105 transitions, 564 flow [2024-11-20 17:51:15,644 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 28.25) internal successors, (226), 8 states have internal predecessors, (226), 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) [2024-11-20 17:51:15,644 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:51:15,644 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:51:15,653 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-20 17:51:15,845 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-20 17:51:15,845 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-20 17:51:15,846 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:51:15,846 INFO L85 PathProgramCache]: Analyzing trace with hash -489415018, now seen corresponding path program 1 times [2024-11-20 17:51:15,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:51:15,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975695276] [2024-11-20 17:51:15,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:51:15,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:51:15,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:51:16,095 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-20 17:51:16,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:51:16,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975695276] [2024-11-20 17:51:16,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975695276] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:51:16,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944625944] [2024-11-20 17:51:16,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:51:16,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:51:16,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:51:16,099 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:51:16,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-20 17:51:16,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:51:16,195 INFO L255 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-20 17:51:16,197 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:51:16,212 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 [2024-11-20 17:51:16,306 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-20 17:51:16,306 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 27 [2024-11-20 17:51:16,380 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-20 17:51:16,380 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:51:16,539 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-20 17:51:16,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944625944] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-20 17:51:16,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-20 17:51:16,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6, 8] total 17 [2024-11-20 17:51:16,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748675983] [2024-11-20 17:51:16,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:51:16,540 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-20 17:51:16,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:51:16,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-20 17:51:16,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2024-11-20 17:51:16,718 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 89 [2024-11-20 17:51:16,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 105 transitions, 564 flow. Second operand has 8 states, 8 states have (on average 39.5) internal successors, (316), 8 states have internal predecessors, (316), 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) [2024-11-20 17:51:16,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:51:16,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 89 [2024-11-20 17:51:16,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:51:17,258 INFO L124 PetriNetUnfolderBase]: 4134/6485 cut-off events. [2024-11-20 17:51:17,258 INFO L125 PetriNetUnfolderBase]: For 2791/3378 co-relation queries the response was YES. [2024-11-20 17:51:17,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15172 conditions, 6485 events. 4134/6485 cut-off events. For 2791/3378 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 39501 event pairs, 1643 based on Foata normal form. 102/5256 useless extension candidates. Maximal degree in co-relation 14152. Up to 3101 conditions per place. [2024-11-20 17:51:17,289 INFO L140 encePairwiseOnDemand]: 77/89 looper letters, 108 selfloop transitions, 17 changer transitions 0/141 dead transitions. [2024-11-20 17:51:17,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 141 transitions, 920 flow [2024-11-20 17:51:17,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-20 17:51:17,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-20 17:51:17,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 391 transitions. [2024-11-20 17:51:17,291 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5491573033707865 [2024-11-20 17:51:17,291 INFO L175 Difference]: Start difference. First operand has 113 places, 105 transitions, 564 flow. Second operand 8 states and 391 transitions. [2024-11-20 17:51:17,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 141 transitions, 920 flow [2024-11-20 17:51:17,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 141 transitions, 876 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-11-20 17:51:17,302 INFO L231 Difference]: Finished difference. Result has 116 places, 107 transitions, 582 flow [2024-11-20 17:51:17,302 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=525, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=582, PETRI_PLACES=116, PETRI_TRANSITIONS=107} [2024-11-20 17:51:17,303 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 30 predicate places. [2024-11-20 17:51:17,303 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 107 transitions, 582 flow [2024-11-20 17:51:17,303 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 39.5) internal successors, (316), 8 states have internal predecessors, (316), 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) [2024-11-20 17:51:17,303 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:51:17,303 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:51:17,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-20 17:51:17,503 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-20 17:51:17,504 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-20 17:51:17,504 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:51:17,504 INFO L85 PathProgramCache]: Analyzing trace with hash -415937407, now seen corresponding path program 1 times [2024-11-20 17:51:17,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:51:17,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162430387] [2024-11-20 17:51:17,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:51:17,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:51:17,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:51:17,731 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-20 17:51:17,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:51:17,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162430387] [2024-11-20 17:51:17,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162430387] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:51:17,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768011224] [2024-11-20 17:51:17,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:51:17,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:51:17,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:51:17,734 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:51:17,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-20 17:51:17,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:51:17,836 INFO L255 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-20 17:51:17,839 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:51:17,855 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-20 17:51:17,921 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2024-11-20 17:51:17,921 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18