./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 023d838f Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 20832c4ec3f8ccecbcf7cfcec0aecbbc925bfb9e6d8397db46b5825bb40681b3 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-023d838-m [2024-11-10 18:17:41,175 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-10 18:17:41,222 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-10 18:17:41,225 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-10 18:17:41,226 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-10 18:17:41,242 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-10 18:17:41,242 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-10 18:17:41,243 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-10 18:17:41,243 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-10 18:17:41,243 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-10 18:17:41,244 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-10 18:17:41,244 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-10 18:17:41,244 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-10 18:17:41,244 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-10 18:17:41,245 INFO L153 SettingsManager]: * Use SBE=true [2024-11-10 18:17:41,245 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-10 18:17:41,245 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-10 18:17:41,246 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-10 18:17:41,246 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-10 18:17:41,246 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-10 18:17:41,247 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-10 18:17:41,250 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-10 18:17:41,250 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-10 18:17:41,251 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-10 18:17:41,251 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-10 18:17:41,251 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-10 18:17:41,251 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-10 18:17:41,251 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-10 18:17:41,251 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-10 18:17:41,252 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-10 18:17:41,252 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-10 18:17:41,252 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-10 18:17:41,252 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-10 18:17:41,252 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 18:17:41,253 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-10 18:17:41,253 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-10 18:17:41,253 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-10 18:17:41,253 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-10 18:17:41,253 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-10 18:17:41,253 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-10 18:17:41,254 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-10 18:17:41,257 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-10 18:17:41,257 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 20832c4ec3f8ccecbcf7cfcec0aecbbc925bfb9e6d8397db46b5825bb40681b3 [2024-11-10 18:17:41,466 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-10 18:17:41,488 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-10 18:17:41,491 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-10 18:17:41,492 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-10 18:17:41,492 INFO L274 PluginConnector]: CDTParser initialized [2024-11-10 18:17:41,493 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c [2024-11-10 18:17:42,829 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-10 18:17:42,981 INFO L384 CDTParser]: Found 1 translation units. [2024-11-10 18:17:42,982 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c [2024-11-10 18:17:42,989 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/394c85e49/9ac2a201d25248d5874b9c8a2066f94b/FLAG0eb4560c2 [2024-11-10 18:17:43,001 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/394c85e49/9ac2a201d25248d5874b9c8a2066f94b [2024-11-10 18:17:43,003 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-10 18:17:43,004 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-10 18:17:43,005 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-10 18:17:43,005 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-10 18:17:43,009 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-10 18:17:43,010 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 06:17:43" (1/1) ... [2024-11-10 18:17:43,011 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ad575f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:17:43, skipping insertion in model container [2024-11-10 18:17:43,011 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 06:17:43" (1/1) ... [2024-11-10 18:17:43,031 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-10 18:17:43,275 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-10 18:17:43,281 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 18:17:43,292 INFO L200 MainTranslator]: Completed pre-run [2024-11-10 18:17:43,320 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 18:17:43,336 INFO L204 MainTranslator]: Completed translation [2024-11-10 18:17:43,337 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:17:43 WrapperNode [2024-11-10 18:17:43,337 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-10 18:17:43,338 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-10 18:17:43,338 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-10 18:17:43,338 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-10 18:17:43,344 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:17:43" (1/1) ... [2024-11-10 18:17:43,350 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:17:43" (1/1) ... [2024-11-10 18:17:43,373 INFO L138 Inliner]: procedures = 25, calls = 31, calls flagged for inlining = 16, calls inlined = 28, statements flattened = 261 [2024-11-10 18:17:43,374 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-10 18:17:43,374 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-10 18:17:43,375 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-10 18:17:43,375 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-10 18:17:43,383 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:17:43" (1/1) ... [2024-11-10 18:17:43,384 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:17:43" (1/1) ... [2024-11-10 18:17:43,387 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:17:43" (1/1) ... [2024-11-10 18:17:43,409 INFO L175 MemorySlicer]: Split 11 memory accesses to 2 slices as follows [2, 9]. 82 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 4 writes are split as follows [0, 4]. [2024-11-10 18:17:43,409 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:17:43" (1/1) ... [2024-11-10 18:17:43,409 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:17:43" (1/1) ... [2024-11-10 18:17:43,416 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:17:43" (1/1) ... [2024-11-10 18:17:43,417 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:17:43" (1/1) ... [2024-11-10 18:17:43,418 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:17:43" (1/1) ... [2024-11-10 18:17:43,419 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:17:43" (1/1) ... [2024-11-10 18:17:43,421 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-10 18:17:43,422 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-10 18:17:43,422 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-10 18:17:43,422 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-10 18:17:43,423 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:17:43" (1/1) ... [2024-11-10 18:17:43,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 18:17:43,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:17:43,453 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-10 18:17:43,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-10 18:17:43,489 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-10 18:17:43,490 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-10 18:17:43,490 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-10 18:17:43,490 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-10 18:17:43,491 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-10 18:17:43,491 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-10 18:17:43,491 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-10 18:17:43,491 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-10 18:17:43,491 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-10 18:17:43,492 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-10 18:17:43,492 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-10 18:17:43,492 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-10 18:17:43,492 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-10 18:17:43,492 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-10 18:17:43,493 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-10 18:17:43,493 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-10 18:17:43,494 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-10 18:17:43,588 INFO L256 CfgBuilder]: Building ICFG [2024-11-10 18:17:43,590 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-10 18:17:43,954 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-10 18:17:43,955 INFO L307 CfgBuilder]: Performing block encoding [2024-11-10 18:17:44,279 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-10 18:17:44,279 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-10 18:17:44,280 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 06:17:44 BoogieIcfgContainer [2024-11-10 18:17:44,280 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-10 18:17:44,282 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-10 18:17:44,283 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-10 18:17:44,286 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-10 18:17:44,286 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 06:17:43" (1/3) ... [2024-11-10 18:17:44,286 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50fef157 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 06:17:44, skipping insertion in model container [2024-11-10 18:17:44,287 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:17:43" (2/3) ... [2024-11-10 18:17:44,288 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50fef157 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 06:17:44, skipping insertion in model container [2024-11-10 18:17:44,288 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 06:17:44" (3/3) ... [2024-11-10 18:17:44,289 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-three-array-sum-alt.wvr.c [2024-11-10 18:17:44,304 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-10 18:17:44,304 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2024-11-10 18:17:44,304 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-10 18:17:44,361 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-10 18:17:44,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 76 places, 78 transitions, 177 flow [2024-11-10 18:17:44,429 INFO L124 PetriNetUnfolderBase]: 12/75 cut-off events. [2024-11-10 18:17:44,430 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-10 18:17:44,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88 conditions, 75 events. 12/75 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 152 event pairs, 0 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 51. Up to 2 conditions per place. [2024-11-10 18:17:44,436 INFO L82 GeneralOperation]: Start removeDead. Operand has 76 places, 78 transitions, 177 flow [2024-11-10 18:17:44,440 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 72 places, 74 transitions, 166 flow [2024-11-10 18:17:44,448 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-10 18:17:44,457 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;@5c8d30c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-10 18:17:44,458 INFO L334 AbstractCegarLoop]: Starting to check reachability of 35 error locations. [2024-11-10 18:17:44,461 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-10 18:17:44,461 INFO L124 PetriNetUnfolderBase]: 2/7 cut-off events. [2024-11-10 18:17:44,461 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-10 18:17:44,461 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:17:44,462 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-10 18:17:44,462 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-10 18:17:44,468 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:17:44,468 INFO L85 PathProgramCache]: Analyzing trace with hash 24770158, now seen corresponding path program 1 times [2024-11-10 18:17:44,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:17:44,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666234650] [2024-11-10 18:17:44,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:17:44,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:17:44,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:17:44,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:17:44,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:17:44,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666234650] [2024-11-10 18:17:44,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666234650] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:17:44,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:17:44,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-10 18:17:44,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889997817] [2024-11-10 18:17:44,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:17:44,689 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 18:17:44,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:17:44,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 18:17:44,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 18:17:44,759 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 78 [2024-11-10 18:17:44,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 74 transitions, 166 flow. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:17:44,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:17:44,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 78 [2024-11-10 18:17:44,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:17:45,003 INFO L124 PetriNetUnfolderBase]: 306/626 cut-off events. [2024-11-10 18:17:45,004 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2024-11-10 18:17:45,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1127 conditions, 626 events. 306/626 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3138 event pairs, 202 based on Foata normal form. 105/604 useless extension candidates. Maximal degree in co-relation 947. Up to 441 conditions per place. [2024-11-10 18:17:45,013 INFO L140 encePairwiseOnDemand]: 66/78 looper letters, 29 selfloop transitions, 2 changer transitions 0/63 dead transitions. [2024-11-10 18:17:45,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 63 transitions, 206 flow [2024-11-10 18:17:45,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:17:45,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:17:45,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 149 transitions. [2024-11-10 18:17:45,028 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6367521367521367 [2024-11-10 18:17:45,031 INFO L175 Difference]: Start difference. First operand has 72 places, 74 transitions, 166 flow. Second operand 3 states and 149 transitions. [2024-11-10 18:17:45,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 63 transitions, 206 flow [2024-11-10 18:17:45,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 63 transitions, 194 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-10 18:17:45,042 INFO L231 Difference]: Finished difference. Result has 63 places, 63 transitions, 136 flow [2024-11-10 18:17:45,044 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=63, PETRI_TRANSITIONS=63} [2024-11-10 18:17:45,049 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, -9 predicate places. [2024-11-10 18:17:45,050 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 63 transitions, 136 flow [2024-11-10 18:17:45,050 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:17:45,050 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:17:45,050 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-10 18:17:45,051 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-10 18:17:45,051 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-10 18:17:45,052 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:17:45,052 INFO L85 PathProgramCache]: Analyzing trace with hash 24770159, now seen corresponding path program 1 times [2024-11-10 18:17:45,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:17:45,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866916725] [2024-11-10 18:17:45,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:17:45,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:17:45,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:17:45,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:17:45,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:17:45,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866916725] [2024-11-10 18:17:45,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866916725] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:17:45,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:17:45,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 18:17:45,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057715698] [2024-11-10 18:17:45,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:17:45,300 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 18:17:45,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:17:45,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 18:17:45,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 18:17:45,352 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 78 [2024-11-10 18:17:45,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 63 transitions, 136 flow. Second operand has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:17:45,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:17:45,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 78 [2024-11-10 18:17:45,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:17:45,524 INFO L124 PetriNetUnfolderBase]: 307/631 cut-off events. [2024-11-10 18:17:45,524 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-11-10 18:17:45,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1104 conditions, 631 events. 307/631 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3151 event pairs, 202 based on Foata normal form. 0/501 useless extension candidates. Maximal degree in co-relation 1059. Up to 454 conditions per place. [2024-11-10 18:17:45,533 INFO L140 encePairwiseOnDemand]: 73/78 looper letters, 33 selfloop transitions, 4 changer transitions 0/66 dead transitions. [2024-11-10 18:17:45,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 66 transitions, 216 flow [2024-11-10 18:17:45,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 18:17:45,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 18:17:45,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 182 transitions. [2024-11-10 18:17:45,537 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-11-10 18:17:45,537 INFO L175 Difference]: Start difference. First operand has 63 places, 63 transitions, 136 flow. Second operand 4 states and 182 transitions. [2024-11-10 18:17:45,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 66 transitions, 216 flow [2024-11-10 18:17:45,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 66 transitions, 212 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 18:17:45,540 INFO L231 Difference]: Finished difference. Result has 66 places, 66 transitions, 159 flow [2024-11-10 18:17:45,540 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=159, PETRI_PLACES=66, PETRI_TRANSITIONS=66} [2024-11-10 18:17:45,541 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, -6 predicate places. [2024-11-10 18:17:45,542 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 66 transitions, 159 flow [2024-11-10 18:17:45,542 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:17:45,542 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:17:45,542 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2024-11-10 18:17:45,542 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-10 18:17:45,543 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-10 18:17:45,544 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:17:45,544 INFO L85 PathProgramCache]: Analyzing trace with hash -805749948, now seen corresponding path program 1 times [2024-11-10 18:17:45,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:17:45,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853191169] [2024-11-10 18:17:45,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:17:45,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:17:45,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:17:45,847 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:17:45,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:17:45,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853191169] [2024-11-10 18:17:45,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853191169] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:17:45,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607783519] [2024-11-10 18:17:45,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:17:45,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:17:45,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:17:45,854 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:17:45,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-10 18:17:45,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:17:45,922 INFO L255 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-10 18:17:45,927 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:17:45,984 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-10 18:17:46,192 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:17:46,192 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:17:46,328 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:17:46,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607783519] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:17:46,330 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:17:46,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-10 18:17:46,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446143042] [2024-11-10 18:17:46,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:17:46,331 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-10 18:17:46,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:17:46,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-10 18:17:46,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-11-10 18:17:46,621 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 78 [2024-11-10 18:17:46,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 66 transitions, 159 flow. Second operand has 11 states, 11 states have (on average 34.36363636363637) internal successors, (378), 11 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:17:46,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:17:46,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 78 [2024-11-10 18:17:46,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:17:46,905 INFO L124 PetriNetUnfolderBase]: 307/630 cut-off events. [2024-11-10 18:17:46,905 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-11-10 18:17:46,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1116 conditions, 630 events. 307/630 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3128 event pairs, 202 based on Foata normal form. 0/499 useless extension candidates. Maximal degree in co-relation 1091. Up to 450 conditions per place. [2024-11-10 18:17:46,909 INFO L140 encePairwiseOnDemand]: 69/78 looper letters, 29 selfloop transitions, 11 changer transitions 0/66 dead transitions. [2024-11-10 18:17:46,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 66 transitions, 237 flow [2024-11-10 18:17:46,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-10 18:17:46,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-10 18:17:46,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 272 transitions. [2024-11-10 18:17:46,912 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4981684981684982 [2024-11-10 18:17:46,912 INFO L175 Difference]: Start difference. First operand has 66 places, 66 transitions, 159 flow. Second operand 7 states and 272 transitions. [2024-11-10 18:17:46,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 66 transitions, 237 flow [2024-11-10 18:17:46,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 66 transitions, 234 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 18:17:46,914 INFO L231 Difference]: Finished difference. Result has 70 places, 65 transitions, 174 flow [2024-11-10 18:17:46,914 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=174, PETRI_PLACES=70, PETRI_TRANSITIONS=65} [2024-11-10 18:17:46,915 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, -2 predicate places. [2024-11-10 18:17:46,915 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 65 transitions, 174 flow [2024-11-10 18:17:46,915 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 34.36363636363637) internal successors, (378), 11 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:17:46,915 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:17:46,915 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:17:46,931 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-10 18:17:47,116 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:17:47,117 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-10 18:17:47,117 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:17:47,118 INFO L85 PathProgramCache]: Analyzing trace with hash -807819736, now seen corresponding path program 1 times [2024-11-10 18:17:47,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:17:47,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632737111] [2024-11-10 18:17:47,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:17:47,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:17:47,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:17:47,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:17:47,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:17:47,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632737111] [2024-11-10 18:17:47,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632737111] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:17:47,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:17:47,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-10 18:17:47,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819368946] [2024-11-10 18:17:47,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:17:47,187 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 18:17:47,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:17:47,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 18:17:47,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-10 18:17:47,229 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 78 [2024-11-10 18:17:47,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 65 transitions, 174 flow. Second operand has 5 states, 5 states have (on average 36.8) internal successors, (184), 5 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:17:47,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:17:47,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 78 [2024-11-10 18:17:47,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:17:47,441 INFO L124 PetriNetUnfolderBase]: 611/1253 cut-off events. [2024-11-10 18:17:47,441 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2024-11-10 18:17:47,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2214 conditions, 1253 events. 611/1253 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 6937 event pairs, 404 based on Foata normal form. 2/1019 useless extension candidates. Maximal degree in co-relation 1112. Up to 453 conditions per place. [2024-11-10 18:17:47,449 INFO L140 encePairwiseOnDemand]: 66/78 looper letters, 59 selfloop transitions, 10 changer transitions 0/97 dead transitions. [2024-11-10 18:17:47,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 97 transitions, 394 flow [2024-11-10 18:17:47,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 18:17:47,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 18:17:47,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 251 transitions. [2024-11-10 18:17:47,454 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6435897435897436 [2024-11-10 18:17:47,454 INFO L175 Difference]: Start difference. First operand has 70 places, 65 transitions, 174 flow. Second operand 5 states and 251 transitions. [2024-11-10 18:17:47,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 97 transitions, 394 flow [2024-11-10 18:17:47,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 97 transitions, 351 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-11-10 18:17:47,458 INFO L231 Difference]: Finished difference. Result has 70 places, 72 transitions, 214 flow [2024-11-10 18:17:47,458 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=214, PETRI_PLACES=70, PETRI_TRANSITIONS=72} [2024-11-10 18:17:47,459 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, -2 predicate places. [2024-11-10 18:17:47,459 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 72 transitions, 214 flow [2024-11-10 18:17:47,459 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.8) internal successors, (184), 5 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:17:47,459 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:17:47,460 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:17:47,460 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-10 18:17:47,460 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-10 18:17:47,460 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:17:47,460 INFO L85 PathProgramCache]: Analyzing trace with hash 474264883, now seen corresponding path program 1 times [2024-11-10 18:17:47,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:17:47,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604527870] [2024-11-10 18:17:47,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:17:47,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:17:47,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:17:47,670 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:17:47,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:17:47,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604527870] [2024-11-10 18:17:47,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604527870] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:17:47,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031865270] [2024-11-10 18:17:47,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:17:47,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:17:47,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:17:47,673 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:17:47,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-10 18:17:47,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:17:47,735 INFO L255 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-10 18:17:47,736 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:17:47,744 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-10 18:17:47,857 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-10 18:17:47,857 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 27 [2024-11-10 18:17:47,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:17:47,887 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:17:47,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:17:47,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031865270] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-10 18:17:47,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-10 18:17:47,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6, 3] total 11 [2024-11-10 18:17:47,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830746854] [2024-11-10 18:17:47,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:17:47,961 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 18:17:47,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:17:47,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 18:17:47,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-11-10 18:17:48,033 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 78 [2024-11-10 18:17:48,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 72 transitions, 214 flow. Second operand has 5 states, 5 states have (on average 37.2) internal successors, (186), 5 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:17:48,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:17:48,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 78 [2024-11-10 18:17:48,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:17:48,313 INFO L124 PetriNetUnfolderBase]: 913/1862 cut-off events. [2024-11-10 18:17:48,314 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-11-10 18:17:48,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3286 conditions, 1862 events. 913/1862 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 11685 event pairs, 606 based on Foata normal form. 2/1519 useless extension candidates. Maximal degree in co-relation 1073. Up to 891 conditions per place. [2024-11-10 18:17:48,324 INFO L140 encePairwiseOnDemand]: 69/78 looper letters, 57 selfloop transitions, 8 changer transitions 0/97 dead transitions. [2024-11-10 18:17:48,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 97 transitions, 409 flow [2024-11-10 18:17:48,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 18:17:48,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 18:17:48,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 247 transitions. [2024-11-10 18:17:48,326 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2024-11-10 18:17:48,326 INFO L175 Difference]: Start difference. First operand has 70 places, 72 transitions, 214 flow. Second operand 5 states and 247 transitions. [2024-11-10 18:17:48,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 97 transitions, 409 flow [2024-11-10 18:17:48,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 97 transitions, 409 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-10 18:17:48,330 INFO L231 Difference]: Finished difference. Result has 75 places, 73 transitions, 244 flow [2024-11-10 18:17:48,330 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=244, PETRI_PLACES=75, PETRI_TRANSITIONS=73} [2024-11-10 18:17:48,332 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 3 predicate places. [2024-11-10 18:17:48,332 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 73 transitions, 244 flow [2024-11-10 18:17:48,332 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 37.2) internal successors, (186), 5 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:17:48,332 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:17:48,333 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:17:48,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-10 18:17:48,537 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:17:48,538 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-10 18:17:48,538 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:17:48,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1616470401, now seen corresponding path program 1 times [2024-11-10 18:17:48,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:17:48,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352994168] [2024-11-10 18:17:48,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:17:48,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:17:48,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:17:48,630 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:17:48,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:17:48,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352994168] [2024-11-10 18:17:48,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352994168] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:17:48,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327506966] [2024-11-10 18:17:48,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:17:48,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:17:48,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:17:48,634 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:17:48,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-10 18:17:48,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:17:48,696 INFO L255 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-10 18:17:48,697 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:17:48,763 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:17:48,763 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:17:48,828 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:17:48,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327506966] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:17:48,828 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:17:48,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-10 18:17:48,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549481050] [2024-11-10 18:17:48,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:17:48,829 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-10 18:17:48,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:17:48,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-10 18:17:48,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2024-11-10 18:17:48,952 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 78 [2024-11-10 18:17:48,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 73 transitions, 244 flow. Second operand has 14 states, 14 states have (on average 37.642857142857146) internal successors, (527), 14 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:17:48,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:17:48,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 78 [2024-11-10 18:17:48,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:17:49,397 INFO L124 PetriNetUnfolderBase]: 1220/2500 cut-off events. [2024-11-10 18:17:49,398 INFO L125 PetriNetUnfolderBase]: For 93/93 co-relation queries the response was YES. [2024-11-10 18:17:49,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4457 conditions, 2500 events. 1220/2500 cut-off events. For 93/93 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 15649 event pairs, 808 based on Foata normal form. 2/2012 useless extension candidates. Maximal degree in co-relation 1114. Up to 1321 conditions per place. [2024-11-10 18:17:49,414 INFO L140 encePairwiseOnDemand]: 65/78 looper letters, 56 selfloop transitions, 36 changer transitions 0/120 dead transitions. [2024-11-10 18:17:49,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 120 transitions, 608 flow [2024-11-10 18:17:49,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-10 18:17:49,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-10 18:17:49,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 489 transitions. [2024-11-10 18:17:49,416 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5699300699300699 [2024-11-10 18:17:49,416 INFO L175 Difference]: Start difference. First operand has 75 places, 73 transitions, 244 flow. Second operand 11 states and 489 transitions. [2024-11-10 18:17:49,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 120 transitions, 608 flow [2024-11-10 18:17:49,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 120 transitions, 606 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 18:17:49,421 INFO L231 Difference]: Finished difference. Result has 87 places, 93 transitions, 467 flow [2024-11-10 18:17:49,421 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=467, PETRI_PLACES=87, PETRI_TRANSITIONS=93} [2024-11-10 18:17:49,422 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 15 predicate places. [2024-11-10 18:17:49,423 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 93 transitions, 467 flow [2024-11-10 18:17:49,423 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 37.642857142857146) internal successors, (527), 14 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:17:49,423 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:17:49,424 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:17:49,442 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-10 18:17:49,624 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 [2024-11-10 18:17:49,625 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-10 18:17:49,625 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:17:49,625 INFO L85 PathProgramCache]: Analyzing trace with hash 2009523045, now seen corresponding path program 1 times [2024-11-10 18:17:49,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:17:49,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626695232] [2024-11-10 18:17:49,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:17:49,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:17:49,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:17:49,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:17:49,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:17:49,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626695232] [2024-11-10 18:17:49,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626695232] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:17:49,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:17:49,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-10 18:17:49,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945848383] [2024-11-10 18:17:49,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:17:49,692 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 18:17:49,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:17:49,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 18:17:49,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-10 18:17:49,721 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 78 [2024-11-10 18:17:49,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 93 transitions, 467 flow. Second operand has 5 states, 5 states have (on average 37.0) internal successors, (185), 5 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:17:49,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:17:49,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 78 [2024-11-10 18:17:49,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:17:50,028 INFO L124 PetriNetUnfolderBase]: 1322/2750 cut-off events. [2024-11-10 18:17:50,028 INFO L125 PetriNetUnfolderBase]: For 218/218 co-relation queries the response was YES. [2024-11-10 18:17:50,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4968 conditions, 2750 events. 1322/2750 cut-off events. For 218/218 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 17748 event pairs, 734 based on Foata normal form. 76/2352 useless extension candidates. Maximal degree in co-relation 2049. Up to 1161 conditions per place. [2024-11-10 18:17:50,047 INFO L140 encePairwiseOnDemand]: 65/78 looper letters, 83 selfloop transitions, 20 changer transitions 0/130 dead transitions. [2024-11-10 18:17:50,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 130 transitions, 779 flow [2024-11-10 18:17:50,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-10 18:17:50,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-10 18:17:50,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 293 transitions. [2024-11-10 18:17:50,049 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6260683760683761 [2024-11-10 18:17:50,049 INFO L175 Difference]: Start difference. First operand has 87 places, 93 transitions, 467 flow. Second operand 6 states and 293 transitions. [2024-11-10 18:17:50,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 130 transitions, 779 flow [2024-11-10 18:17:50,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 130 transitions, 704 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-11-10 18:17:50,052 INFO L231 Difference]: Finished difference. Result has 90 places, 95 transitions, 448 flow [2024-11-10 18:17:50,053 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=392, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=448, PETRI_PLACES=90, PETRI_TRANSITIONS=95} [2024-11-10 18:17:50,053 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 18 predicate places. [2024-11-10 18:17:50,053 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 95 transitions, 448 flow [2024-11-10 18:17:50,054 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 37.0) internal successors, (185), 5 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:17:50,054 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:17:50,054 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2024-11-10 18:17:50,054 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-10 18:17:50,054 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-10 18:17:50,054 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:17:50,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1932458314, now seen corresponding path program 2 times [2024-11-10 18:17:50,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:17:50,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356388761] [2024-11-10 18:17:50,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:17:50,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:17:50,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:17:50,290 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:17:50,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:17:50,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356388761] [2024-11-10 18:17:50,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356388761] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:17:50,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808690762] [2024-11-10 18:17:50,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 18:17:50,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:17:50,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:17:50,293 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:17:50,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-10 18:17:50,357 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 18:17:50,357 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 18:17:50,358 INFO L255 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-10 18:17:50,360 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:17:50,376 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-10 18:17:50,526 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-10 18:17:50,527 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 20 [2024-11-10 18:17:50,640 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:17:50,640 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:17:50,900 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:17:50,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808690762] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:17:50,901 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:17:50,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 22 [2024-11-10 18:17:50,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595855241] [2024-11-10 18:17:50,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:17:50,902 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-10 18:17:50,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:17:50,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-10 18:17:50,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2024-11-10 18:17:51,858 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 78 [2024-11-10 18:17:51,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 95 transitions, 448 flow. Second operand has 24 states, 24 states have (on average 34.375) internal successors, (825), 24 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:17:51,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:17:51,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 78 [2024-11-10 18:17:51,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:17:53,060 INFO L124 PetriNetUnfolderBase]: 1187/2642 cut-off events. [2024-11-10 18:17:53,061 INFO L125 PetriNetUnfolderBase]: For 729/765 co-relation queries the response was YES. [2024-11-10 18:17:53,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5152 conditions, 2642 events. 1187/2642 cut-off events. For 729/765 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 16610 event pairs, 808 based on Foata normal form. 14/2191 useless extension candidates. Maximal degree in co-relation 2431. Up to 1284 conditions per place. [2024-11-10 18:17:53,081 INFO L140 encePairwiseOnDemand]: 63/78 looper letters, 67 selfloop transitions, 53 changer transitions 0/146 dead transitions. [2024-11-10 18:17:53,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 146 transitions, 948 flow [2024-11-10 18:17:53,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-10 18:17:53,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-10 18:17:53,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 682 transitions. [2024-11-10 18:17:53,083 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5143288084464555 [2024-11-10 18:17:53,084 INFO L175 Difference]: Start difference. First operand has 90 places, 95 transitions, 448 flow. Second operand 17 states and 682 transitions. [2024-11-10 18:17:53,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 146 transitions, 948 flow [2024-11-10 18:17:53,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 146 transitions, 889 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-10 18:17:53,091 INFO L231 Difference]: Finished difference. Result has 105 places, 119 transitions, 725 flow [2024-11-10 18:17:53,092 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=396, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=725, PETRI_PLACES=105, PETRI_TRANSITIONS=119} [2024-11-10 18:17:53,094 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 33 predicate places. [2024-11-10 18:17:53,094 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 119 transitions, 725 flow [2024-11-10 18:17:53,095 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 34.375) internal successors, (825), 24 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:17:53,096 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:17:53,096 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:17:53,110 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-10 18:17:53,298 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:17:53,299 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-10 18:17:53,299 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:17:53,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1575147505, now seen corresponding path program 1 times [2024-11-10 18:17:53,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:17:53,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565881174] [2024-11-10 18:17:53,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:17:53,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:17:53,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:17:53,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:17:53,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:17:53,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565881174] [2024-11-10 18:17:53,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565881174] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:17:53,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:17:53,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-10 18:17:53,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540578435] [2024-11-10 18:17:53,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:17:53,360 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 18:17:53,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:17:53,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 18:17:53,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-10 18:17:53,390 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 78 [2024-11-10 18:17:53,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 119 transitions, 725 flow. Second operand has 5 states, 5 states have (on average 37.4) internal successors, (187), 5 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:17:53,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:17:53,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 78 [2024-11-10 18:17:53,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:17:53,699 INFO L124 PetriNetUnfolderBase]: 1437/2967 cut-off events. [2024-11-10 18:17:53,700 INFO L125 PetriNetUnfolderBase]: For 899/1043 co-relation queries the response was YES. [2024-11-10 18:17:53,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5942 conditions, 2967 events. 1437/2967 cut-off events. For 899/1043 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 18412 event pairs, 941 based on Foata normal form. 41/2541 useless extension candidates. Maximal degree in co-relation 4340. Up to 1783 conditions per place. [2024-11-10 18:17:53,720 INFO L140 encePairwiseOnDemand]: 65/78 looper letters, 101 selfloop transitions, 25 changer transitions 0/151 dead transitions. [2024-11-10 18:17:53,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 151 transitions, 1089 flow [2024-11-10 18:17:53,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-10 18:17:53,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-10 18:17:53,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 290 transitions. [2024-11-10 18:17:53,722 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6196581196581197 [2024-11-10 18:17:53,722 INFO L175 Difference]: Start difference. First operand has 105 places, 119 transitions, 725 flow. Second operand 6 states and 290 transitions. [2024-11-10 18:17:53,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 151 transitions, 1089 flow [2024-11-10 18:17:53,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 151 transitions, 1064 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-11-10 18:17:53,727 INFO L231 Difference]: Finished difference. Result has 110 places, 121 transitions, 766 flow [2024-11-10 18:17:53,727 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=700, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=766, PETRI_PLACES=110, PETRI_TRANSITIONS=121} [2024-11-10 18:17:53,727 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 38 predicate places. [2024-11-10 18:17:53,728 INFO L471 AbstractCegarLoop]: Abstraction has has 110 places, 121 transitions, 766 flow [2024-11-10 18:17:53,728 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 37.4) internal successors, (187), 5 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:17:53,728 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:17:53,728 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:17:53,728 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-10 18:17:53,728 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread3Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-10 18:17:53,728 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:17:53,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1946967774, now seen corresponding path program 1 times [2024-11-10 18:17:53,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:17:53,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271481191] [2024-11-10 18:17:53,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:17:53,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:17:53,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:17:53,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:17:53,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:17:53,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271481191] [2024-11-10 18:17:53,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271481191] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:17:53,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:17:53,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-10 18:17:53,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083353512] [2024-11-10 18:17:53,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:17:53,790 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 18:17:53,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:17:53,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 18:17:53,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-10 18:17:53,833 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 78 [2024-11-10 18:17:53,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 121 transitions, 766 flow. Second operand has 5 states, 5 states have (on average 37.8) internal successors, (189), 5 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:17:53,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:17:53,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 78 [2024-11-10 18:17:53,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:17:54,100 INFO L124 PetriNetUnfolderBase]: 1202/2396 cut-off events. [2024-11-10 18:17:54,100 INFO L125 PetriNetUnfolderBase]: For 1300/1543 co-relation queries the response was YES. [2024-11-10 18:17:54,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5367 conditions, 2396 events. 1202/2396 cut-off events. For 1300/1543 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 13711 event pairs, 808 based on Foata normal form. 22/2138 useless extension candidates. Maximal degree in co-relation 3849. Up to 1591 conditions per place. [2024-11-10 18:17:54,117 INFO L140 encePairwiseOnDemand]: 65/78 looper letters, 94 selfloop transitions, 25 changer transitions 0/144 dead transitions. [2024-11-10 18:17:54,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 144 transitions, 1106 flow [2024-11-10 18:17:54,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-10 18:17:54,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-10 18:17:54,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 283 transitions. [2024-11-10 18:17:54,121 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6047008547008547 [2024-11-10 18:17:54,121 INFO L175 Difference]: Start difference. First operand has 110 places, 121 transitions, 766 flow. Second operand 6 states and 283 transitions. [2024-11-10 18:17:54,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 144 transitions, 1106 flow [2024-11-10 18:17:54,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 144 transitions, 1046 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-11-10 18:17:54,128 INFO L231 Difference]: Finished difference. Result has 114 places, 123 transitions, 780 flow [2024-11-10 18:17:54,128 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=714, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=780, PETRI_PLACES=114, PETRI_TRANSITIONS=123} [2024-11-10 18:17:54,129 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 42 predicate places. [2024-11-10 18:17:54,129 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 123 transitions, 780 flow [2024-11-10 18:17:54,129 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 37.8) internal successors, (189), 5 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:17:54,129 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:17:54,129 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:17:54,129 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-10 18:17:54,130 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-10 18:17:54,130 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:17:54,130 INFO L85 PathProgramCache]: Analyzing trace with hash 2006985941, now seen corresponding path program 1 times [2024-11-10 18:17:54,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:17:54,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212050951] [2024-11-10 18:17:54,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:17:54,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:17:54,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:17:54,467 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:17:54,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:17:54,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212050951] [2024-11-10 18:17:54,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212050951] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:17:54,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59568155] [2024-11-10 18:17:54,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:17:54,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:17:54,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:17:54,470 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:17:54,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-10 18:17:54,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:17:54,539 INFO L255 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-10 18:17:54,545 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:17:54,553 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-10 18:17:54,556 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-10 18:17:54,611 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-10 18:17:54,611 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-10 18:17:54,617 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-10 18:17:54,748 INFO L349 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2024-11-10 18:17:54,749 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 28 treesize of output 32 [2024-11-10 18:17:55,175 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 18:17:55,175 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:17:55,610 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 18:17:55,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59568155] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-10 18:17:55,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-10 18:17:55,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 15 [2024-11-10 18:17:55,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830640154] [2024-11-10 18:17:55,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:17:55,611 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-10 18:17:55,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:17:55,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-10 18:17:55,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2024-11-10 18:17:57,039 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-10 18:17:57,304 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 78 [2024-11-10 18:17:57,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 123 transitions, 780 flow. Second operand has 7 states, 7 states have (on average 39.857142857142854) internal successors, (279), 7 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:17:57,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:17:57,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 78 [2024-11-10 18:17:57,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:17:59,091 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-10 18:17:59,332 INFO L124 PetriNetUnfolderBase]: 1817/4466 cut-off events. [2024-11-10 18:17:59,332 INFO L125 PetriNetUnfolderBase]: For 2252/2456 co-relation queries the response was YES. [2024-11-10 18:17:59,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9325 conditions, 4466 events. 1817/4466 cut-off events. For 2252/2456 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 33807 event pairs, 1022 based on Foata normal form. 0/3811 useless extension candidates. Maximal degree in co-relation 6784. Up to 1963 conditions per place. [2024-11-10 18:17:59,362 INFO L140 encePairwiseOnDemand]: 69/78 looper letters, 97 selfloop transitions, 22 changer transitions 0/160 dead transitions. [2024-11-10 18:17:59,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 160 transitions, 1171 flow [2024-11-10 18:17:59,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-10 18:17:59,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-10 18:17:59,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 334 transitions. [2024-11-10 18:17:59,364 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6117216117216118 [2024-11-10 18:17:59,364 INFO L175 Difference]: Start difference. First operand has 114 places, 123 transitions, 780 flow. Second operand 7 states and 334 transitions. [2024-11-10 18:17:59,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 160 transitions, 1171 flow [2024-11-10 18:17:59,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 160 transitions, 1126 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-10 18:17:59,374 INFO L231 Difference]: Finished difference. Result has 119 places, 128 transitions, 840 flow [2024-11-10 18:17:59,375 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=736, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=840, PETRI_PLACES=119, PETRI_TRANSITIONS=128} [2024-11-10 18:17:59,375 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 47 predicate places. [2024-11-10 18:17:59,375 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 128 transitions, 840 flow [2024-11-10 18:17:59,375 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 39.857142857142854) internal successors, (279), 7 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:17:59,376 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:17:59,376 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:17:59,394 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-10 18:17:59,579 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-10 18:17:59,580 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-10 18:17:59,580 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:17:59,580 INFO L85 PathProgramCache]: Analyzing trace with hash 2006985940, now seen corresponding path program 1 times [2024-11-10 18:17:59,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:17:59,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328616405] [2024-11-10 18:17:59,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:17:59,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:17:59,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:17:59,685 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 18:17:59,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:17:59,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328616405] [2024-11-10 18:17:59,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328616405] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:17:59,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:17:59,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 18:17:59,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797432769] [2024-11-10 18:17:59,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:17:59,687 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 18:17:59,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:17:59,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 18:17:59,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-10 18:17:59,742 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 78 [2024-11-10 18:17:59,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 128 transitions, 840 flow. Second operand has 5 states, 5 states have (on average 35.6) internal successors, (178), 5 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:17:59,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:17:59,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 78 [2024-11-10 18:17:59,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:18:00,070 INFO L124 PetriNetUnfolderBase]: 1769/3955 cut-off events. [2024-11-10 18:18:00,070 INFO L125 PetriNetUnfolderBase]: For 5001/5481 co-relation queries the response was YES. [2024-11-10 18:18:00,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9875 conditions, 3955 events. 1769/3955 cut-off events. For 5001/5481 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 27536 event pairs, 1223 based on Foata normal form. 228/3713 useless extension candidates. Maximal degree in co-relation 7198. Up to 2555 conditions per place. [2024-11-10 18:18:00,104 INFO L140 encePairwiseOnDemand]: 73/78 looper letters, 74 selfloop transitions, 13 changer transitions 0/126 dead transitions. [2024-11-10 18:18:00,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 126 transitions, 1010 flow [2024-11-10 18:18:00,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 18:18:00,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 18:18:00,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 199 transitions. [2024-11-10 18:18:00,105 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5102564102564102 [2024-11-10 18:18:00,106 INFO L175 Difference]: Start difference. First operand has 119 places, 128 transitions, 840 flow. Second operand 5 states and 199 transitions. [2024-11-10 18:18:00,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 126 transitions, 1010 flow [2024-11-10 18:18:00,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 126 transitions, 989 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-11-10 18:18:00,115 INFO L231 Difference]: Finished difference. Result has 119 places, 126 transitions, 841 flow [2024-11-10 18:18:00,116 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=815, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=841, PETRI_PLACES=119, PETRI_TRANSITIONS=126} [2024-11-10 18:18:00,116 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 47 predicate places. [2024-11-10 18:18:00,116 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 126 transitions, 841 flow [2024-11-10 18:18:00,116 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 35.6) internal successors, (178), 5 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:18:00,117 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:18:00,117 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:18:00,117 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-10 18:18:00,117 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-10 18:18:00,117 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:18:00,117 INFO L85 PathProgramCache]: Analyzing trace with hash 281662847, now seen corresponding path program 1 times [2024-11-10 18:18:00,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:18:00,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354494196] [2024-11-10 18:18:00,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:18:00,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:18:00,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:18:00,310 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 18:18:00,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:18:00,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354494196] [2024-11-10 18:18:00,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354494196] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:18:00,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33590703] [2024-11-10 18:18:00,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:18:00,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:18:00,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:18:00,315 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:18:00,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-10 18:18:00,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:18:00,392 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-10 18:18:00,394 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:18:00,400 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-10 18:18:00,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-10 18:18:00,447 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-10 18:18:00,454 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-10 18:18:00,454 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-10 18:18:00,511 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 18:18:00,511 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:18:00,625 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2024-11-10 18:18:00,690 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 18:18:00,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33590703] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:18:00,690 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:18:00,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 13 [2024-11-10 18:18:00,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33617632] [2024-11-10 18:18:00,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:18:00,690 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-10 18:18:00,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:18:00,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-10 18:18:00,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2024-11-10 18:18:04,701 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-10 18:18:08,710 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-10 18:18:12,741 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-10 18:18:16,790 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-10 18:18:20,793 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-10 18:18:24,841 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-10 18:18:28,881 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-10 18:18:32,908 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-10 18:18:37,001 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-10 18:18:41,033 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] [2024-11-10 18:18:41,080 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 78 [2024-11-10 18:18:41,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 126 transitions, 841 flow. Second operand has 14 states, 14 states have (on average 30.642857142857142) internal successors, (429), 14 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:18:41,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:18:41,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 78 [2024-11-10 18:18:41,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:18:41,981 INFO L124 PetriNetUnfolderBase]: 4433/8089 cut-off events. [2024-11-10 18:18:41,981 INFO L125 PetriNetUnfolderBase]: For 9781/11248 co-relation queries the response was YES. [2024-11-10 18:18:42,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20630 conditions, 8089 events. 4433/8089 cut-off events. For 9781/11248 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 56532 event pairs, 1887 based on Foata normal form. 0/6669 useless extension candidates. Maximal degree in co-relation 14368. Up to 4320 conditions per place. [2024-11-10 18:18:42,036 INFO L140 encePairwiseOnDemand]: 67/78 looper letters, 111 selfloop transitions, 29 changer transitions 0/166 dead transitions. [2024-11-10 18:18:42,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 166 transitions, 1295 flow [2024-11-10 18:18:42,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-10 18:18:42,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-10 18:18:42,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 307 transitions. [2024-11-10 18:18:42,038 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49198717948717946 [2024-11-10 18:18:42,038 INFO L175 Difference]: Start difference. First operand has 119 places, 126 transitions, 841 flow. Second operand 8 states and 307 transitions. [2024-11-10 18:18:42,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 166 transitions, 1295 flow [2024-11-10 18:18:42,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 166 transitions, 1277 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-10 18:18:42,050 INFO L231 Difference]: Finished difference. Result has 125 places, 130 transitions, 925 flow [2024-11-10 18:18:42,050 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=823, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=925, PETRI_PLACES=125, PETRI_TRANSITIONS=130} [2024-11-10 18:18:42,051 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 53 predicate places. [2024-11-10 18:18:42,051 INFO L471 AbstractCegarLoop]: Abstraction has has 125 places, 130 transitions, 925 flow [2024-11-10 18:18:42,051 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 30.642857142857142) internal successors, (429), 14 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:18:42,052 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:18:42,052 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:18:42,066 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-10 18:18:42,252 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:18:42,253 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-10 18:18:42,253 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:18:42,253 INFO L85 PathProgramCache]: Analyzing trace with hash 281662846, now seen corresponding path program 1 times [2024-11-10 18:18:42,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:18:42,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988190386] [2024-11-10 18:18:42,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:18:42,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:18:42,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:18:42,397 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 18:18:42,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:18:42,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988190386] [2024-11-10 18:18:42,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988190386] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:18:42,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:18:42,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-10 18:18:42,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513901536] [2024-11-10 18:18:42,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:18:42,399 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 18:18:42,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:18:42,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 18:18:42,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-10 18:18:42,429 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 78 [2024-11-10 18:18:42,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 130 transitions, 925 flow. Second operand has 5 states, 5 states have (on average 37.0) internal successors, (185), 5 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:18:42,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:18:42,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 78 [2024-11-10 18:18:42,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:18:42,910 INFO L124 PetriNetUnfolderBase]: 2123/4758 cut-off events. [2024-11-10 18:18:42,910 INFO L125 PetriNetUnfolderBase]: For 9283/10132 co-relation queries the response was YES. [2024-11-10 18:18:42,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13060 conditions, 4758 events. 2123/4758 cut-off events. For 9283/10132 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 34662 event pairs, 1382 based on Foata normal form. 264/4470 useless extension candidates. Maximal degree in co-relation 9377. Up to 2984 conditions per place. [2024-11-10 18:18:42,940 INFO L140 encePairwiseOnDemand]: 73/78 looper letters, 75 selfloop transitions, 15 changer transitions 0/128 dead transitions. [2024-11-10 18:18:42,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 128 transitions, 1101 flow [2024-11-10 18:18:42,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 18:18:42,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 18:18:42,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 203 transitions. [2024-11-10 18:18:42,941 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5205128205128206 [2024-11-10 18:18:42,941 INFO L175 Difference]: Start difference. First operand has 125 places, 130 transitions, 925 flow. Second operand 5 states and 203 transitions. [2024-11-10 18:18:42,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 128 transitions, 1101 flow [2024-11-10 18:18:42,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 128 transitions, 1089 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 18:18:42,950 INFO L231 Difference]: Finished difference. Result has 125 places, 128 transitions, 939 flow [2024-11-10 18:18:42,950 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=909, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=939, PETRI_PLACES=125, PETRI_TRANSITIONS=128} [2024-11-10 18:18:42,950 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 53 predicate places. [2024-11-10 18:18:42,951 INFO L471 AbstractCegarLoop]: Abstraction has has 125 places, 128 transitions, 939 flow [2024-11-10 18:18:42,951 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 37.0) internal successors, (185), 5 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:18:42,951 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:18:42,951 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:18:42,951 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-10 18:18:42,951 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-10 18:18:42,951 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:18:42,952 INFO L85 PathProgramCache]: Analyzing trace with hash -120736981, now seen corresponding path program 1 times [2024-11-10 18:18:42,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:18:42,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532469240] [2024-11-10 18:18:42,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:18:42,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:18:42,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:18:43,044 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 18:18:43,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:18:43,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532469240] [2024-11-10 18:18:43,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532469240] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:18:43,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558658849] [2024-11-10 18:18:43,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:18:43,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:18:43,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:18:43,049 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:18:43,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-10 18:18:43,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:18:43,126 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-10 18:18:43,127 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:18:43,210 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 18:18:43,210 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:18:43,269 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 18:18:43,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558658849] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:18:43,270 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:18:43,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-10 18:18:43,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702047981] [2024-11-10 18:18:43,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:18:43,270 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-10 18:18:43,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:18:43,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-10 18:18:43,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-11-10 18:18:43,368 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 78 [2024-11-10 18:18:43,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 128 transitions, 939 flow. Second operand has 14 states, 14 states have (on average 36.357142857142854) internal successors, (509), 14 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:18:43,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:18:43,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 78 [2024-11-10 18:18:43,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:18:44,233 INFO L124 PetriNetUnfolderBase]: 3593/6768 cut-off events. [2024-11-10 18:18:44,233 INFO L125 PetriNetUnfolderBase]: For 12422/13619 co-relation queries the response was YES. [2024-11-10 18:18:44,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19121 conditions, 6768 events. 3593/6768 cut-off events. For 12422/13619 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 46764 event pairs, 1467 based on Foata normal form. 50/6333 useless extension candidates. Maximal degree in co-relation 13260. Up to 2441 conditions per place. [2024-11-10 18:18:44,268 INFO L140 encePairwiseOnDemand]: 60/78 looper letters, 153 selfloop transitions, 60 changer transitions 0/233 dead transitions. [2024-11-10 18:18:44,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 233 transitions, 1851 flow [2024-11-10 18:18:44,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-10 18:18:44,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-10 18:18:44,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 554 transitions. [2024-11-10 18:18:44,270 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5918803418803419 [2024-11-10 18:18:44,270 INFO L175 Difference]: Start difference. First operand has 125 places, 128 transitions, 939 flow. Second operand 12 states and 554 transitions. [2024-11-10 18:18:44,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 233 transitions, 1851 flow [2024-11-10 18:18:44,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 233 transitions, 1829 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-10 18:18:44,283 INFO L231 Difference]: Finished difference. Result has 136 places, 134 transitions, 1096 flow [2024-11-10 18:18:44,283 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=917, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1096, PETRI_PLACES=136, PETRI_TRANSITIONS=134} [2024-11-10 18:18:44,284 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 64 predicate places. [2024-11-10 18:18:44,284 INFO L471 AbstractCegarLoop]: Abstraction has has 136 places, 134 transitions, 1096 flow [2024-11-10 18:18:44,285 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 36.357142857142854) internal successors, (509), 14 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:18:44,285 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:18:44,285 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:18:44,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-10 18:18:44,485 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:18:44,486 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread3Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-10 18:18:44,486 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:18:44,486 INFO L85 PathProgramCache]: Analyzing trace with hash -364679089, now seen corresponding path program 1 times [2024-11-10 18:18:44,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:18:44,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565839301] [2024-11-10 18:18:44,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:18:44,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:18:44,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:18:44,767 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:18:44,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:18:44,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565839301] [2024-11-10 18:18:44,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565839301] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:18:44,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940756835] [2024-11-10 18:18:44,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:18:44,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:18:44,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:18:44,770 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:18:44,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-10 18:18:44,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:18:44,854 INFO L255 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-10 18:18:44,856 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:18:44,863 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-10 18:18:44,867 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-10 18:18:44,917 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-10 18:18:44,918 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-10 18:18:44,926 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-10 18:18:45,037 INFO L349 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2024-11-10 18:18:45,038 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 [2024-11-10 18:18:45,787 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 18:18:45,787 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:18:46,153 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 18:18:46,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940756835] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-10 18:18:46,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-10 18:18:46,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 15 [2024-11-10 18:18:46,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342834864] [2024-11-10 18:18:46,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:18:46,154 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-10 18:18:46,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:18:46,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-10 18:18:46,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2024-11-10 18:18:46,417 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 78 [2024-11-10 18:18:46,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 134 transitions, 1096 flow. Second operand has 7 states, 7 states have (on average 39.42857142857143) internal successors, (276), 7 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:18:46,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:18:46,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 78 [2024-11-10 18:18:46,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:18:48,113 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-10 18:18:49,416 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-10 18:18:50,726 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-10 18:18:52,079 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-10 18:18:52,574 INFO L124 PetriNetUnfolderBase]: 3114/6311 cut-off events. [2024-11-10 18:18:52,574 INFO L125 PetriNetUnfolderBase]: For 18665/20128 co-relation queries the response was YES. [2024-11-10 18:18:52,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19507 conditions, 6311 events. 3114/6311 cut-off events. For 18665/20128 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 45499 event pairs, 1127 based on Foata normal form. 67/5932 useless extension candidates. Maximal degree in co-relation 13616. Up to 2234 conditions per place. [2024-11-10 18:18:52,624 INFO L140 encePairwiseOnDemand]: 68/78 looper letters, 109 selfloop transitions, 23 changer transitions 0/170 dead transitions. [2024-11-10 18:18:52,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 170 transitions, 1582 flow [2024-11-10 18:18:52,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-10 18:18:52,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-10 18:18:52,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 324 transitions. [2024-11-10 18:18:52,625 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5934065934065934 [2024-11-10 18:18:52,626 INFO L175 Difference]: Start difference. First operand has 136 places, 134 transitions, 1096 flow. Second operand 7 states and 324 transitions. [2024-11-10 18:18:52,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 170 transitions, 1582 flow [2024-11-10 18:18:52,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 170 transitions, 1498 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-11-10 18:18:52,653 INFO L231 Difference]: Finished difference. Result has 139 places, 138 transitions, 1114 flow [2024-11-10 18:18:52,654 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=1022, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1114, PETRI_PLACES=139, PETRI_TRANSITIONS=138} [2024-11-10 18:18:52,654 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 67 predicate places. [2024-11-10 18:18:52,654 INFO L471 AbstractCegarLoop]: Abstraction has has 139 places, 138 transitions, 1114 flow [2024-11-10 18:18:52,654 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 39.42857142857143) internal successors, (276), 7 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:18:52,654 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:18:52,655 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:18:52,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-10 18:18:52,855 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-10 18:18:52,856 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-10 18:18:52,856 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:18:52,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1347390166, now seen corresponding path program 1 times [2024-11-10 18:18:52,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:18:52,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686617507] [2024-11-10 18:18:52,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:18:52,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:18:52,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:18:52,969 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 18:18:52,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:18:52,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686617507] [2024-11-10 18:18:52,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686617507] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:18:52,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586826268] [2024-11-10 18:18:52,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:18:52,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:18:52,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:18:52,972 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:18:52,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-10 18:18:53,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:18:53,052 INFO L255 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-10 18:18:53,053 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:18:53,120 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 18:18:53,120 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:18:53,171 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 18:18:53,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586826268] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:18:53,171 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:18:53,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-10 18:18:53,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102994675] [2024-11-10 18:18:53,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:18:53,172 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-10 18:18:53,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:18:53,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-10 18:18:53,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-11-10 18:18:53,248 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 78 [2024-11-10 18:18:53,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 138 transitions, 1114 flow. Second operand has 14 states, 14 states have (on average 36.5) internal successors, (511), 14 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:18:53,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:18:53,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 78 [2024-11-10 18:18:53,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:18:54,186 INFO L124 PetriNetUnfolderBase]: 4359/8074 cut-off events. [2024-11-10 18:18:54,187 INFO L125 PetriNetUnfolderBase]: For 21603/22642 co-relation queries the response was YES. [2024-11-10 18:18:54,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25621 conditions, 8074 events. 4359/8074 cut-off events. For 21603/22642 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 56478 event pairs, 1734 based on Foata normal form. 150/7845 useless extension candidates. Maximal degree in co-relation 18506. Up to 2981 conditions per place. [2024-11-10 18:18:54,238 INFO L140 encePairwiseOnDemand]: 60/78 looper letters, 157 selfloop transitions, 60 changer transitions 0/240 dead transitions. [2024-11-10 18:18:54,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 240 transitions, 2183 flow [2024-11-10 18:18:54,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-10 18:18:54,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-10 18:18:54,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 550 transitions. [2024-11-10 18:18:54,240 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5876068376068376 [2024-11-10 18:18:54,240 INFO L175 Difference]: Start difference. First operand has 139 places, 138 transitions, 1114 flow. Second operand 12 states and 550 transitions. [2024-11-10 18:18:54,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 240 transitions, 2183 flow [2024-11-10 18:18:54,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 240 transitions, 2155 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-10 18:18:54,259 INFO L231 Difference]: Finished difference. Result has 149 places, 144 transitions, 1265 flow [2024-11-10 18:18:54,259 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=1086, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1265, PETRI_PLACES=149, PETRI_TRANSITIONS=144} [2024-11-10 18:18:54,260 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 77 predicate places. [2024-11-10 18:18:54,260 INFO L471 AbstractCegarLoop]: Abstraction has has 149 places, 144 transitions, 1265 flow [2024-11-10 18:18:54,260 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 36.5) internal successors, (511), 14 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:18:54,260 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:18:54,260 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:18:54,274 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-10 18:18:54,464 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-10 18:18:54,465 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread3Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-10 18:18:54,465 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:18:54,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1579850892, now seen corresponding path program 1 times [2024-11-10 18:18:54,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:18:54,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535843246] [2024-11-10 18:18:54,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:18:54,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:18:54,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:18:54,616 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 18:18:54,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:18:54,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535843246] [2024-11-10 18:18:54,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535843246] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:18:54,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507461210] [2024-11-10 18:18:54,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:18:54,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:18:54,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:18:54,619 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:18:54,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-10 18:18:54,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:18:54,701 INFO L255 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-10 18:18:54,703 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:18:54,707 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-10 18:18:54,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-10 18:18:54,745 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-10 18:18:54,750 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-10 18:18:54,750 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-10 18:18:54,798 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 18:18:54,798 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:18:54,890 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2024-11-10 18:18:55,004 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 18:18:55,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507461210] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:18:55,004 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:18:55,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-10 18:18:55,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204950526] [2024-11-10 18:18:55,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:18:55,005 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-10 18:18:55,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:18:55,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-10 18:18:55,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-11-10 18:18:55,464 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 78 [2024-11-10 18:18:55,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 144 transitions, 1265 flow. Second operand has 13 states, 13 states have (on average 37.84615384615385) internal successors, (492), 13 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:18:55,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:18:55,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 78 [2024-11-10 18:18:55,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:18:56,467 INFO L124 PetriNetUnfolderBase]: 3335/7231 cut-off events. [2024-11-10 18:18:56,468 INFO L125 PetriNetUnfolderBase]: For 26451/27886 co-relation queries the response was YES. [2024-11-10 18:18:56,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23780 conditions, 7231 events. 3335/7231 cut-off events. For 26451/27886 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 56068 event pairs, 1127 based on Foata normal form. 197/6724 useless extension candidates. Maximal degree in co-relation 17385. Up to 2301 conditions per place. [2024-11-10 18:18:56,519 INFO L140 encePairwiseOnDemand]: 66/78 looper letters, 132 selfloop transitions, 31 changer transitions 0/205 dead transitions. [2024-11-10 18:18:56,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 205 transitions, 2025 flow [2024-11-10 18:18:56,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-10 18:18:56,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-10 18:18:56,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 396 transitions. [2024-11-10 18:18:56,522 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5641025641025641 [2024-11-10 18:18:56,522 INFO L175 Difference]: Start difference. First operand has 149 places, 144 transitions, 1265 flow. Second operand 9 states and 396 transitions. [2024-11-10 18:18:56,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 205 transitions, 2025 flow [2024-11-10 18:18:56,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 205 transitions, 1931 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-11-10 18:18:56,550 INFO L231 Difference]: Finished difference. Result has 154 places, 146 transitions, 1283 flow [2024-11-10 18:18:56,550 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=1191, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1283, PETRI_PLACES=154, PETRI_TRANSITIONS=146} [2024-11-10 18:18:56,551 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 82 predicate places. [2024-11-10 18:18:56,551 INFO L471 AbstractCegarLoop]: Abstraction has has 154 places, 146 transitions, 1283 flow [2024-11-10 18:18:56,551 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 37.84615384615385) internal successors, (492), 13 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:18:56,551 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:18:56,551 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:18:56,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-10 18:18:56,752 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-10 18:18:56,752 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-10 18:18:56,752 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:18:56,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1730738255, now seen corresponding path program 1 times [2024-11-10 18:18:56,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:18:56,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752761601] [2024-11-10 18:18:56,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:18:56,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:18:56,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:18:56,872 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 18:18:56,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:18:56,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752761601] [2024-11-10 18:18:56,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752761601] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:18:56,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369749488] [2024-11-10 18:18:56,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:18:56,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:18:56,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:18:56,874 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:18:56,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-10 18:18:56,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:18:56,956 INFO L255 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-10 18:18:56,957 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:18:56,966 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-10 18:18:57,042 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-10 18:18:57,043 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 27 [2024-11-10 18:18:57,093 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 18:18:57,094 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:18:57,196 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 18:18:57,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369749488] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-10 18:18:57,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-10 18:18:57,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 6] total 12 [2024-11-10 18:18:57,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021455015] [2024-11-10 18:18:57,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:18:57,197 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-10 18:18:57,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:18:57,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-10 18:18:57,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-11-10 18:18:57,380 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 78 [2024-11-10 18:18:57,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 146 transitions, 1283 flow. Second operand has 7 states, 7 states have (on average 39.57142857142857) internal successors, (277), 7 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:18:57,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:18:57,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 78 [2024-11-10 18:18:57,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:18:58,366 INFO L124 PetriNetUnfolderBase]: 3458/7081 cut-off events. [2024-11-10 18:18:58,366 INFO L125 PetriNetUnfolderBase]: For 28427/29405 co-relation queries the response was YES. [2024-11-10 18:18:58,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25051 conditions, 7081 events. 3458/7081 cut-off events. For 28427/29405 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 51764 event pairs, 1428 based on Foata normal form. 356/7089 useless extension candidates. Maximal degree in co-relation 18657. Up to 2869 conditions per place. [2024-11-10 18:18:58,437 INFO L140 encePairwiseOnDemand]: 68/78 looper letters, 129 selfloop transitions, 22 changer transitions 0/192 dead transitions. [2024-11-10 18:18:58,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 192 transitions, 1931 flow [2024-11-10 18:18:58,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-10 18:18:58,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-10 18:18:58,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 326 transitions. [2024-11-10 18:18:58,439 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5970695970695971 [2024-11-10 18:18:58,439 INFO L175 Difference]: Start difference. First operand has 154 places, 146 transitions, 1283 flow. Second operand 7 states and 326 transitions. [2024-11-10 18:18:58,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 192 transitions, 1931 flow [2024-11-10 18:18:58,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 192 transitions, 1882 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-10 18:18:58,466 INFO L231 Difference]: Finished difference. Result has 155 places, 148 transitions, 1327 flow [2024-11-10 18:18:58,466 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=1232, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1327, PETRI_PLACES=155, PETRI_TRANSITIONS=148} [2024-11-10 18:18:58,466 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 83 predicate places. [2024-11-10 18:18:58,467 INFO L471 AbstractCegarLoop]: Abstraction has has 155 places, 148 transitions, 1327 flow [2024-11-10 18:18:58,467 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 39.57142857142857) internal successors, (277), 7 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:18:58,467 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:18:58,467 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:18:58,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-10 18:18:58,667 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:18:58,668 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread3Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-10 18:18:58,668 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:18:58,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1730738254, now seen corresponding path program 1 times [2024-11-10 18:18:58,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:18:58,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173522711] [2024-11-10 18:18:58,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:18:58,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:18:58,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:18:58,762 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 18:18:58,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:18:58,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173522711] [2024-11-10 18:18:58,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173522711] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:18:58,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:18:58,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 18:18:58,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038318450] [2024-11-10 18:18:58,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:18:58,763 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 18:18:58,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:18:58,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 18:18:58,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 18:18:58,792 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 78 [2024-11-10 18:18:58,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 148 transitions, 1327 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) [2024-11-10 18:18:58,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:18:58,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 78 [2024-11-10 18:18:58,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:18:59,627 INFO L124 PetriNetUnfolderBase]: 3157/6534 cut-off events. [2024-11-10 18:18:59,627 INFO L125 PetriNetUnfolderBase]: For 30991/31969 co-relation queries the response was YES. [2024-11-10 18:18:59,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25054 conditions, 6534 events. 3157/6534 cut-off events. For 30991/31969 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 47540 event pairs, 2154 based on Foata normal form. 560/6770 useless extension candidates. Maximal degree in co-relation 18848. Up to 4444 conditions per place. [2024-11-10 18:18:59,685 INFO L140 encePairwiseOnDemand]: 74/78 looper letters, 97 selfloop transitions, 9 changer transitions 0/146 dead transitions. [2024-11-10 18:18:59,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 146 transitions, 1535 flow [2024-11-10 18:18:59,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 18:18:59,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 18:18:59,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 169 transitions. [2024-11-10 18:18:59,687 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-11-10 18:18:59,687 INFO L175 Difference]: Start difference. First operand has 155 places, 148 transitions, 1327 flow. Second operand 4 states and 169 transitions. [2024-11-10 18:18:59,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 146 transitions, 1535 flow [2024-11-10 18:18:59,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 146 transitions, 1516 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-10 18:18:59,713 INFO L231 Difference]: Finished difference. Result has 152 places, 146 transitions, 1322 flow [2024-11-10 18:18:59,714 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=1304, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1322, PETRI_PLACES=152, PETRI_TRANSITIONS=146} [2024-11-10 18:18:59,714 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 80 predicate places. [2024-11-10 18:18:59,714 INFO L471 AbstractCegarLoop]: Abstraction has has 152 places, 146 transitions, 1322 flow [2024-11-10 18:18:59,714 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) [2024-11-10 18:18:59,715 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:18:59,715 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:18:59,715 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-10 18:18:59,715 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-10 18:18:59,715 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:18:59,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1876245067, now seen corresponding path program 1 times [2024-11-10 18:18:59,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:18:59,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321705862] [2024-11-10 18:18:59,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:18:59,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:18:59,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:18:59,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:18:59,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:18:59,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321705862] [2024-11-10 18:18:59,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321705862] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:18:59,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:18:59,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 18:18:59,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235137089] [2024-11-10 18:18:59,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:18:59,790 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 18:18:59,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:18:59,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 18:18:59,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 18:18:59,791 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 78 [2024-11-10 18:18:59,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 146 transitions, 1322 flow. Second operand has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:18:59,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:18:59,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 78 [2024-11-10 18:18:59,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:19:00,806 INFO L124 PetriNetUnfolderBase]: 3613/7747 cut-off events. [2024-11-10 18:19:00,806 INFO L125 PetriNetUnfolderBase]: For 38159/39123 co-relation queries the response was YES. [2024-11-10 18:19:00,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29439 conditions, 7747 events. 3613/7747 cut-off events. For 38159/39123 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 59938 event pairs, 1056 based on Foata normal form. 165/7720 useless extension candidates. Maximal degree in co-relation 20796. Up to 3507 conditions per place. [2024-11-10 18:19:00,968 INFO L140 encePairwiseOnDemand]: 73/78 looper letters, 105 selfloop transitions, 6 changer transitions 25/171 dead transitions. [2024-11-10 18:19:00,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 171 transitions, 1770 flow [2024-11-10 18:19:00,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:19:00,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:19:00,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 168 transitions. [2024-11-10 18:19:00,970 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.717948717948718 [2024-11-10 18:19:00,970 INFO L175 Difference]: Start difference. First operand has 152 places, 146 transitions, 1322 flow. Second operand 3 states and 168 transitions. [2024-11-10 18:19:00,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 171 transitions, 1770 flow [2024-11-10 18:19:00,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 171 transitions, 1760 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 18:19:01,002 INFO L231 Difference]: Finished difference. Result has 153 places, 127 transitions, 1084 flow [2024-11-10 18:19:01,002 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=1312, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1084, PETRI_PLACES=153, PETRI_TRANSITIONS=127} [2024-11-10 18:19:01,002 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 81 predicate places. [2024-11-10 18:19:01,003 INFO L471 AbstractCegarLoop]: Abstraction has has 153 places, 127 transitions, 1084 flow [2024-11-10 18:19:01,003 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:19:01,003 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:19:01,003 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:19:01,003 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-11-10 18:19:01,003 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread3Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-10 18:19:01,003 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:19:01,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1071309476, now seen corresponding path program 1 times [2024-11-10 18:19:01,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:19:01,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360634833] [2024-11-10 18:19:01,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:19:01,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:19:01,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:19:01,100 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 18:19:01,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:19:01,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360634833] [2024-11-10 18:19:01,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360634833] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:19:01,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109766189] [2024-11-10 18:19:01,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:19:01,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:19:01,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:19:01,103 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:19:01,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-10 18:19:01,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:19:01,195 INFO L255 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-10 18:19:01,196 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:19:01,277 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 18:19:01,277 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:19:01,332 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 18:19:01,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109766189] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:19:01,332 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:19:01,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-10 18:19:01,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74803877] [2024-11-10 18:19:01,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:19:01,333 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-10 18:19:01,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:19:01,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-10 18:19:01,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-11-10 18:19:01,472 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 78 [2024-11-10 18:19:01,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 127 transitions, 1084 flow. Second operand has 14 states, 14 states have (on average 37.07142857142857) internal successors, (519), 14 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:19:01,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:19:01,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 78 [2024-11-10 18:19:01,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:19:02,421 INFO L124 PetriNetUnfolderBase]: 4283/6926 cut-off events. [2024-11-10 18:19:02,422 INFO L125 PetriNetUnfolderBase]: For 36396/37910 co-relation queries the response was YES. [2024-11-10 18:19:02,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28973 conditions, 6926 events. 4283/6926 cut-off events. For 36396/37910 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 42403 event pairs, 1910 based on Foata normal form. 227/7075 useless extension candidates. Maximal degree in co-relation 22029. Up to 3787 conditions per place. [2024-11-10 18:19:02,487 INFO L140 encePairwiseOnDemand]: 60/78 looper letters, 130 selfloop transitions, 51 changer transitions 0/203 dead transitions. [2024-11-10 18:19:02,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 203 transitions, 2015 flow [2024-11-10 18:19:02,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-10 18:19:02,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-10 18:19:02,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 530 transitions. [2024-11-10 18:19:02,489 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5662393162393162 [2024-11-10 18:19:02,489 INFO L175 Difference]: Start difference. First operand has 153 places, 127 transitions, 1084 flow. Second operand 12 states and 530 transitions. [2024-11-10 18:19:02,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 203 transitions, 2015 flow [2024-11-10 18:19:02,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 203 transitions, 1759 flow, removed 34 selfloop flow, removed 20 redundant places. [2024-11-10 18:19:02,529 INFO L231 Difference]: Finished difference. Result has 139 places, 134 transitions, 1123 flow [2024-11-10 18:19:02,529 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=939, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1123, PETRI_PLACES=139, PETRI_TRANSITIONS=134} [2024-11-10 18:19:02,529 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 67 predicate places. [2024-11-10 18:19:02,530 INFO L471 AbstractCegarLoop]: Abstraction has has 139 places, 134 transitions, 1123 flow [2024-11-10 18:19:02,530 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 37.07142857142857) internal successors, (519), 14 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:19:02,530 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:19:02,530 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:19:02,544 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-10 18:19:02,730 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,SelfDestructingSolverStorable21 [2024-11-10 18:19:02,731 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-10 18:19:02,731 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:19:02,731 INFO L85 PathProgramCache]: Analyzing trace with hash -350722277, now seen corresponding path program 2 times [2024-11-10 18:19:02,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:19:02,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905672900] [2024-11-10 18:19:02,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:19:02,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:19:02,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:19:03,196 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-10 18:19:03,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:19:03,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905672900] [2024-11-10 18:19:03,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905672900] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:19:03,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200642085] [2024-11-10 18:19:03,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 18:19:03,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:19:03,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:19:03,199 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) [2024-11-10 18:19:03,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-10 18:19:03,312 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 18:19:03,312 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 18:19:03,313 INFO L255 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-10 18:19:03,316 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:19:03,323 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-10 18:19:03,334 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-10 18:19:03,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-10 18:19:03,464 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-10 18:19:03,483 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-10 18:19:03,483 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-10 18:19:03,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-10 18:19:03,611 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-10 18:19:03,617 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-10 18:19:03,618 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-10 18:19:03,869 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-10 18:19:03,869 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:19:04,544 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-10 18:19:04,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200642085] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:19:04,545 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:19:04,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 6] total 22 [2024-11-10 18:19:04,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037053273] [2024-11-10 18:19:04,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:19:04,545 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-10 18:19:04,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:19:04,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-10 18:19:04,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2024-11-10 18:19:06,253 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 78 [2024-11-10 18:19:06,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 134 transitions, 1123 flow. Second operand has 24 states, 24 states have (on average 32.208333333333336) internal successors, (773), 24 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:19:06,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:19:06,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 78 [2024-11-10 18:19:06,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:19:09,686 INFO L124 PetriNetUnfolderBase]: 9258/15408 cut-off events. [2024-11-10 18:19:09,686 INFO L125 PetriNetUnfolderBase]: For 53280/54574 co-relation queries the response was YES. [2024-11-10 18:19:09,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56722 conditions, 15408 events. 9258/15408 cut-off events. For 53280/54574 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 111727 event pairs, 1732 based on Foata normal form. 274/15490 useless extension candidates. Maximal degree in co-relation 34767. Up to 2873 conditions per place. [2024-11-10 18:19:09,861 INFO L140 encePairwiseOnDemand]: 65/78 looper letters, 301 selfloop transitions, 49 changer transitions 0/380 dead transitions. [2024-11-10 18:19:09,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 380 transitions, 3676 flow [2024-11-10 18:19:09,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-10 18:19:09,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-10 18:19:09,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 805 transitions. [2024-11-10 18:19:09,863 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5160256410256411 [2024-11-10 18:19:09,863 INFO L175 Difference]: Start difference. First operand has 139 places, 134 transitions, 1123 flow. Second operand 20 states and 805 transitions. [2024-11-10 18:19:09,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 380 transitions, 3676 flow [2024-11-10 18:19:09,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 380 transitions, 3600 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-11-10 18:19:09,921 INFO L231 Difference]: Finished difference. Result has 155 places, 145 transitions, 1279 flow [2024-11-10 18:19:09,922 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=1062, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1279, PETRI_PLACES=155, PETRI_TRANSITIONS=145} [2024-11-10 18:19:09,922 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 83 predicate places. [2024-11-10 18:19:09,922 INFO L471 AbstractCegarLoop]: Abstraction has has 155 places, 145 transitions, 1279 flow [2024-11-10 18:19:09,923 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 32.208333333333336) internal successors, (773), 24 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:19:09,923 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:19:09,923 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:19:09,937 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-10 18:19:10,125 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-10 18:19:10,126 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-10 18:19:10,126 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:19:10,126 INFO L85 PathProgramCache]: Analyzing trace with hash 975039770, now seen corresponding path program 2 times [2024-11-10 18:19:10,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:19:10,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488560913] [2024-11-10 18:19:10,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:19:10,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:19:10,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:19:10,432 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-10 18:19:10,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:19:10,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488560913] [2024-11-10 18:19:10,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488560913] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:19:10,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878796575] [2024-11-10 18:19:10,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 18:19:10,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:19:10,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:19:10,434 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:19:10,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-10 18:19:10,520 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 18:19:10,521 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 18:19:10,522 INFO L255 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-10 18:19:10,524 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:19:10,531 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-10 18:19:10,536 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-10 18:19:10,602 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-10 18:19:10,603 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-10 18:19:10,617 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 24 [2024-11-10 18:19:10,979 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-10 18:19:10,979 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:19:11,313 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-10 18:19:11,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878796575] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:19:11,314 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:19:11,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 24 [2024-11-10 18:19:11,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249616308] [2024-11-10 18:19:11,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:19:11,314 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-10 18:19:11,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:19:11,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-10 18:19:11,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2024-11-10 18:19:12,825 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 78 [2024-11-10 18:19:12,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 145 transitions, 1279 flow. Second operand has 25 states, 25 states have (on average 30.68) internal successors, (767), 25 states have internal predecessors, (767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:19:12,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:19:12,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 78 [2024-11-10 18:19:12,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand