./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/array-eq-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 3061b6dc 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/array-eq-symm.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 6897befed0dbbae24492a1e82d50fcd0be6b3857b241d882a904d02a513d7a6d --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-19 09:42:45,385 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-19 09:42:45,444 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-19 09:42:45,449 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-19 09:42:45,449 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-19 09:42:45,464 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-19 09:42:45,464 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-19 09:42:45,464 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-19 09:42:45,465 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-19 09:42:45,467 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-19 09:42:45,467 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-19 09:42:45,467 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-19 09:42:45,468 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-19 09:42:45,468 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-19 09:42:45,471 INFO L153 SettingsManager]: * Use SBE=true [2024-11-19 09:42:45,471 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-19 09:42:45,471 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-19 09:42:45,472 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-19 09:42:45,472 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-19 09:42:45,472 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-19 09:42:45,472 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-19 09:42:45,473 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-19 09:42:45,473 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-19 09:42:45,473 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-19 09:42:45,473 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-19 09:42:45,473 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-19 09:42:45,473 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-19 09:42:45,474 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-19 09:42:45,474 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-19 09:42:45,474 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-19 09:42:45,474 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-19 09:42:45,474 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-19 09:42:45,474 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-19 09:42:45,475 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 09:42:45,475 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-19 09:42:45,475 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-19 09:42:45,475 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-19 09:42:45,475 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-19 09:42:45,475 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-19 09:42:45,476 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-19 09:42:45,476 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-19 09:42:45,476 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-19 09:42:45,476 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6897befed0dbbae24492a1e82d50fcd0be6b3857b241d882a904d02a513d7a6d [2024-11-19 09:42:45,670 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-19 09:42:45,686 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-19 09:42:45,688 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-19 09:42:45,689 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-19 09:42:45,690 INFO L274 PluginConnector]: CDTParser initialized [2024-11-19 09:42:45,691 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/array-eq-symm.wvr.c [2024-11-19 09:42:47,018 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-19 09:42:47,197 INFO L384 CDTParser]: Found 1 translation units. [2024-11-19 09:42:47,197 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/array-eq-symm.wvr.c [2024-11-19 09:42:47,204 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/802dabbce/1f9a4d00e2734852b01c01373b661576/FLAG1baa9bffb [2024-11-19 09:42:47,215 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/802dabbce/1f9a4d00e2734852b01c01373b661576 [2024-11-19 09:42:47,218 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-19 09:42:47,220 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-19 09:42:47,221 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-19 09:42:47,222 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-19 09:42:47,226 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-19 09:42:47,227 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:42:47" (1/1) ... [2024-11-19 09:42:47,227 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55384a8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:42:47, skipping insertion in model container [2024-11-19 09:42:47,228 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:42:47" (1/1) ... [2024-11-19 09:42:47,249 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-19 09:42:47,448 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-19 09:42:47,450 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 09:42:47,469 INFO L200 MainTranslator]: Completed pre-run [2024-11-19 09:42:47,498 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 09:42:47,513 INFO L204 MainTranslator]: Completed translation [2024-11-19 09:42:47,514 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:42:47 WrapperNode [2024-11-19 09:42:47,514 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-19 09:42:47,515 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-19 09:42:47,515 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-19 09:42:47,515 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-19 09:42:47,521 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:42:47" (1/1) ... [2024-11-19 09:42:47,532 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:42:47" (1/1) ... [2024-11-19 09:42:47,556 INFO L138 Inliner]: procedures = 22, calls = 20, calls flagged for inlining = 8, calls inlined = 10, statements flattened = 107 [2024-11-19 09:42:47,557 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-19 09:42:47,557 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-19 09:42:47,558 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-19 09:42:47,558 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-19 09:42:47,572 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:42:47" (1/1) ... [2024-11-19 09:42:47,572 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:42:47" (1/1) ... [2024-11-19 09:42:47,574 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:42:47" (1/1) ... [2024-11-19 09:42:47,589 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-11-19 09:42:47,589 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:42:47" (1/1) ... [2024-11-19 09:42:47,589 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:42:47" (1/1) ... [2024-11-19 09:42:47,599 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:42:47" (1/1) ... [2024-11-19 09:42:47,606 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:42:47" (1/1) ... [2024-11-19 09:42:47,607 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:42:47" (1/1) ... [2024-11-19 09:42:47,610 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:42:47" (1/1) ... [2024-11-19 09:42:47,612 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-19 09:42:47,613 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-19 09:42:47,613 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-19 09:42:47,613 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-19 09:42:47,614 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:42:47" (1/1) ... [2024-11-19 09:42:47,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 09:42:47,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:42:47,646 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) [2024-11-19 09:42:47,650 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 [2024-11-19 09:42:47,691 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-19 09:42:47,691 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-19 09:42:47,691 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-19 09:42:47,691 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-19 09:42:47,691 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-19 09:42:47,691 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-19 09:42:47,691 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-19 09:42:47,691 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-19 09:42:47,691 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-19 09:42:47,691 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-19 09:42:47,692 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-19 09:42:47,692 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-19 09:42:47,692 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-19 09:42:47,692 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-19 09:42:47,693 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-19 09:42:47,777 INFO L238 CfgBuilder]: Building ICFG [2024-11-19 09:42:47,779 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-19 09:42:47,993 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-19 09:42:47,993 INFO L287 CfgBuilder]: Performing block encoding [2024-11-19 09:42:48,131 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-19 09:42:48,132 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-19 09:42:48,132 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:42:48 BoogieIcfgContainer [2024-11-19 09:42:48,132 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-19 09:42:48,136 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-19 09:42:48,136 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-19 09:42:48,139 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-19 09:42:48,140 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 09:42:47" (1/3) ... [2024-11-19 09:42:48,141 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bfc9522 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:42:48, skipping insertion in model container [2024-11-19 09:42:48,141 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:42:47" (2/3) ... [2024-11-19 09:42:48,141 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bfc9522 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:42:48, skipping insertion in model container [2024-11-19 09:42:48,142 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:42:48" (3/3) ... [2024-11-19 09:42:48,144 INFO L112 eAbstractionObserver]: Analyzing ICFG array-eq-symm.wvr.c [2024-11-19 09:42:48,158 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-19 09:42:48,158 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2024-11-19 09:42:48,158 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-19 09:42:48,212 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-19 09:42:48,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 49 places, 48 transitions, 110 flow [2024-11-19 09:42:48,268 INFO L124 PetriNetUnfolderBase]: 6/46 cut-off events. [2024-11-19 09:42:48,269 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-19 09:42:48,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55 conditions, 46 events. 6/46 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 107 event pairs, 0 based on Foata normal form. 0/26 useless extension candidates. Maximal degree in co-relation 29. Up to 2 conditions per place. [2024-11-19 09:42:48,272 INFO L82 GeneralOperation]: Start removeDead. Operand has 49 places, 48 transitions, 110 flow [2024-11-19 09:42:48,275 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 46 places, 45 transitions, 102 flow [2024-11-19 09:42:48,282 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 09:42:48,288 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;@5c1cdcca, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 09:42:48,288 INFO L334 AbstractCegarLoop]: Starting to check reachability of 24 error locations. [2024-11-19 09:42:48,295 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-19 09:42:48,295 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-19 09:42:48,295 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-19 09:42:48,295 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:42:48,296 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-19 09:42:48,296 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-19 09:42:48,302 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:42:48,302 INFO L85 PathProgramCache]: Analyzing trace with hash 467441, now seen corresponding path program 1 times [2024-11-19 09:42:48,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:42:48,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935874013] [2024-11-19 09:42:48,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:42:48,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:42:48,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:42:48,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:42:48,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:42:48,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935874013] [2024-11-19 09:42:48,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935874013] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:42:48,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:42:48,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-19 09:42:48,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373596779] [2024-11-19 09:42:48,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:42:48,515 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:42:48,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:42:48,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:42:48,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:42:48,580 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2024-11-19 09:42:48,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 45 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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) [2024-11-19 09:42:48,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:42:48,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2024-11-19 09:42:48,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:42:48,672 INFO L124 PetriNetUnfolderBase]: 101/218 cut-off events. [2024-11-19 09:42:48,673 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2024-11-19 09:42:48,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 385 conditions, 218 events. 101/218 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 809 event pairs, 35 based on Foata normal form. 1/132 useless extension candidates. Maximal degree in co-relation 329. Up to 143 conditions per place. [2024-11-19 09:42:48,676 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 20 selfloop transitions, 2 changer transitions 0/41 dead transitions. [2024-11-19 09:42:48,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 41 transitions, 138 flow [2024-11-19 09:42:48,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:42:48,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:42:48,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 91 transitions. [2024-11-19 09:42:48,686 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6319444444444444 [2024-11-19 09:42:48,687 INFO L175 Difference]: Start difference. First operand has 46 places, 45 transitions, 102 flow. Second operand 3 states and 91 transitions. [2024-11-19 09:42:48,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 41 transitions, 138 flow [2024-11-19 09:42:48,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 41 transitions, 130 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-19 09:42:48,695 INFO L231 Difference]: Finished difference. Result has 40 places, 41 transitions, 90 flow [2024-11-19 09:42:48,697 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=40, PETRI_TRANSITIONS=41} [2024-11-19 09:42:48,704 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, -6 predicate places. [2024-11-19 09:42:48,704 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 41 transitions, 90 flow [2024-11-19 09:42:48,704 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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) [2024-11-19 09:42:48,704 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:42:48,704 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-19 09:42:48,705 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-19 09:42:48,705 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-19 09:42:48,705 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:42:48,705 INFO L85 PathProgramCache]: Analyzing trace with hash 467442, now seen corresponding path program 1 times [2024-11-19 09:42:48,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:42:48,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046355055] [2024-11-19 09:42:48,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:42:48,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:42:48,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:42:48,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:42:48,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:42:48,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046355055] [2024-11-19 09:42:48,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046355055] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:42:48,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:42:48,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:42:48,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357313599] [2024-11-19 09:42:48,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:42:48,982 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:42:48,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:42:48,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:42:48,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:42:49,027 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2024-11-19 09:42:49,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 41 transitions, 90 flow. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:42:49,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:42:49,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2024-11-19 09:42:49,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:42:49,126 INFO L124 PetriNetUnfolderBase]: 102/221 cut-off events. [2024-11-19 09:42:49,128 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-19 09:42:49,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 384 conditions, 221 events. 102/221 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 809 event pairs, 35 based on Foata normal form. 0/132 useless extension candidates. Maximal degree in co-relation 355. Up to 152 conditions per place. [2024-11-19 09:42:49,130 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 23 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2024-11-19 09:42:49,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 44 transitions, 150 flow [2024-11-19 09:42:49,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:42:49,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:42:49,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 116 transitions. [2024-11-19 09:42:49,131 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2024-11-19 09:42:49,131 INFO L175 Difference]: Start difference. First operand has 40 places, 41 transitions, 90 flow. Second operand 4 states and 116 transitions. [2024-11-19 09:42:49,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 44 transitions, 150 flow [2024-11-19 09:42:49,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 44 transitions, 146 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:42:49,134 INFO L231 Difference]: Finished difference. Result has 43 places, 44 transitions, 113 flow [2024-11-19 09:42:49,134 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=113, PETRI_PLACES=43, PETRI_TRANSITIONS=44} [2024-11-19 09:42:49,134 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, -3 predicate places. [2024-11-19 09:42:49,135 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 44 transitions, 113 flow [2024-11-19 09:42:49,135 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:42:49,135 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:42:49,135 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-19 09:42:49,135 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-19 09:42:49,139 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-19 09:42:49,140 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:42:49,140 INFO L85 PathProgramCache]: Analyzing trace with hash 14491672, now seen corresponding path program 1 times [2024-11-19 09:42:49,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:42:49,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100232032] [2024-11-19 09:42:49,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:42:49,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:42:49,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:42:49,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:42:49,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:42:49,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100232032] [2024-11-19 09:42:49,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100232032] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:42:49,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:42:49,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:42:49,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655258413] [2024-11-19 09:42:49,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:42:49,335 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:42:49,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:42:49,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:42:49,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:42:49,467 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2024-11-19 09:42:49,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 44 transitions, 113 flow. Second operand has 5 states, 5 states have (on average 22.8) internal successors, (114), 5 states have internal predecessors, (114), 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) [2024-11-19 09:42:49,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:42:49,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2024-11-19 09:42:49,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:42:49,670 INFO L124 PetriNetUnfolderBase]: 103/224 cut-off events. [2024-11-19 09:42:49,671 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-19 09:42:49,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 401 conditions, 224 events. 103/224 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 806 event pairs, 35 based on Foata normal form. 0/134 useless extension candidates. Maximal degree in co-relation 376. Up to 151 conditions per place. [2024-11-19 09:42:49,673 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 23 selfloop transitions, 7 changer transitions 0/47 dead transitions. [2024-11-19 09:42:49,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 47 transitions, 179 flow [2024-11-19 09:42:49,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:42:49,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:42:49,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 141 transitions. [2024-11-19 09:42:49,676 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-11-19 09:42:49,677 INFO L175 Difference]: Start difference. First operand has 43 places, 44 transitions, 113 flow. Second operand 5 states and 141 transitions. [2024-11-19 09:42:49,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 47 transitions, 179 flow [2024-11-19 09:42:49,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 47 transitions, 176 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 09:42:49,679 INFO L231 Difference]: Finished difference. Result has 48 places, 47 transitions, 147 flow [2024-11-19 09:42:49,680 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=147, PETRI_PLACES=48, PETRI_TRANSITIONS=47} [2024-11-19 09:42:49,680 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 2 predicate places. [2024-11-19 09:42:49,680 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 47 transitions, 147 flow [2024-11-19 09:42:49,681 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.8) internal successors, (114), 5 states have internal predecessors, (114), 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) [2024-11-19 09:42:49,681 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:42:49,681 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-19 09:42:49,681 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-19 09:42:49,681 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-19 09:42:49,681 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:42:49,682 INFO L85 PathProgramCache]: Analyzing trace with hash 449225612, now seen corresponding path program 1 times [2024-11-19 09:42:49,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:42:49,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651658296] [2024-11-19 09:42:49,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:42:49,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:42:49,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:42:49,830 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:42:49,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:42:49,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651658296] [2024-11-19 09:42:49,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651658296] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:42:49,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495602359] [2024-11-19 09:42:49,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:42:49,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:42:49,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:42:49,833 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) [2024-11-19 09:42:49,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-19 09:42:49,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:42:49,883 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-19 09:42:49,892 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:42:49,948 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 [2024-11-19 09:42:50,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:42:50,131 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:42:50,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:42:50,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495602359] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:42:50,268 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:42:50,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-19 09:42:50,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564859730] [2024-11-19 09:42:50,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:42:50,269 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-19 09:42:50,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:42:50,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-19 09:42:50,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-11-19 09:42:50,501 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2024-11-19 09:42:50,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 47 transitions, 147 flow. Second operand has 11 states, 11 states have (on average 23.363636363636363) internal successors, (257), 11 states have internal predecessors, (257), 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) [2024-11-19 09:42:50,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:42:50,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2024-11-19 09:42:50,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:42:50,661 INFO L124 PetriNetUnfolderBase]: 103/223 cut-off events. [2024-11-19 09:42:50,661 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-19 09:42:50,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 414 conditions, 223 events. 103/223 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 809 event pairs, 35 based on Foata normal form. 0/136 useless extension candidates. Maximal degree in co-relation 386. Up to 151 conditions per place. [2024-11-19 09:42:50,663 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 22 selfloop transitions, 7 changer transitions 0/46 dead transitions. [2024-11-19 09:42:50,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 46 transitions, 201 flow [2024-11-19 09:42:50,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 09:42:50,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-19 09:42:50,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-11-19 09:42:50,665 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5520833333333334 [2024-11-19 09:42:50,665 INFO L175 Difference]: Start difference. First operand has 48 places, 47 transitions, 147 flow. Second operand 6 states and 159 transitions. [2024-11-19 09:42:50,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 46 transitions, 201 flow [2024-11-19 09:42:50,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 46 transitions, 200 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 09:42:50,668 INFO L231 Difference]: Finished difference. Result has 51 places, 46 transitions, 156 flow [2024-11-19 09:42:50,668 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=156, PETRI_PLACES=51, PETRI_TRANSITIONS=46} [2024-11-19 09:42:50,669 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 5 predicate places. [2024-11-19 09:42:50,669 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 46 transitions, 156 flow [2024-11-19 09:42:50,669 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 23.363636363636363) internal successors, (257), 11 states have internal predecessors, (257), 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) [2024-11-19 09:42:50,669 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:42:50,670 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-11-19 09:42:50,685 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-19 09:42:50,870 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:42:50,870 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-19 09:42:50,871 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:42:50,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1041609111, now seen corresponding path program 1 times [2024-11-19 09:42:50,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:42:50,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116633427] [2024-11-19 09:42:50,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:42:50,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:42:50,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:42:51,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:42:51,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:42:51,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116633427] [2024-11-19 09:42:51,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116633427] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:42:51,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744125854] [2024-11-19 09:42:51,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:42:51,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:42:51,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:42:51,076 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) [2024-11-19 09:42:51,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-19 09:42:51,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:42:51,135 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-19 09:42:51,136 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:42:51,154 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 [2024-11-19 09:42:51,231 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:42:51,231 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:42:51,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:42:51,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744125854] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:42:51,321 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:42:51,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-19 09:42:51,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434473962] [2024-11-19 09:42:51,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:42:51,322 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-19 09:42:51,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:42:51,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-19 09:42:51,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2024-11-19 09:42:51,673 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2024-11-19 09:42:51,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 46 transitions, 156 flow. Second operand has 13 states, 13 states have (on average 23.307692307692307) internal successors, (303), 13 states have internal predecessors, (303), 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) [2024-11-19 09:42:51,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:42:51,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2024-11-19 09:42:51,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:42:51,930 INFO L124 PetriNetUnfolderBase]: 105/228 cut-off events. [2024-11-19 09:42:51,931 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-11-19 09:42:51,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 440 conditions, 228 events. 105/228 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 839 event pairs, 35 based on Foata normal form. 0/141 useless extension candidates. Maximal degree in co-relation 394. Up to 144 conditions per place. [2024-11-19 09:42:51,932 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 16 selfloop transitions, 18 changer transitions 0/51 dead transitions. [2024-11-19 09:42:51,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 51 transitions, 253 flow [2024-11-19 09:42:51,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-19 09:42:51,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-19 09:42:51,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 234 transitions. [2024-11-19 09:42:51,934 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-11-19 09:42:51,934 INFO L175 Difference]: Start difference. First operand has 51 places, 46 transitions, 156 flow. Second operand 9 states and 234 transitions. [2024-11-19 09:42:51,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 51 transitions, 253 flow [2024-11-19 09:42:51,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 51 transitions, 206 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-11-19 09:42:51,936 INFO L231 Difference]: Finished difference. Result has 50 places, 51 transitions, 174 flow [2024-11-19 09:42:51,936 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=174, PETRI_PLACES=50, PETRI_TRANSITIONS=51} [2024-11-19 09:42:51,937 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 4 predicate places. [2024-11-19 09:42:51,937 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 51 transitions, 174 flow [2024-11-19 09:42:51,937 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 23.307692307692307) internal successors, (303), 13 states have internal predecessors, (303), 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) [2024-11-19 09:42:51,937 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:42:51,937 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:42:51,952 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-19 09:42:52,141 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 [2024-11-19 09:42:52,142 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-19 09:42:52,143 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:42:52,143 INFO L85 PathProgramCache]: Analyzing trace with hash -2067205011, now seen corresponding path program 1 times [2024-11-19 09:42:52,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:42:52,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224364704] [2024-11-19 09:42:52,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:42:52,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:42:52,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:42:52,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:42:52,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:42:52,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224364704] [2024-11-19 09:42:52,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224364704] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:42:52,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:42:52,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:42:52,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89606607] [2024-11-19 09:42:52,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:42:52,178 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:42:52,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:42:52,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:42:52,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:42:52,195 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 48 [2024-11-19 09:42:52,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 51 transitions, 174 flow. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:42:52,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:42:52,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 48 [2024-11-19 09:42:52,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:42:52,280 INFO L124 PetriNetUnfolderBase]: 165/384 cut-off events. [2024-11-19 09:42:52,280 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-19 09:42:52,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 722 conditions, 384 events. 165/384 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1806 event pairs, 71 based on Foata normal form. 0/243 useless extension candidates. Maximal degree in co-relation 421. Up to 175 conditions per place. [2024-11-19 09:42:52,283 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 52 selfloop transitions, 5 changer transitions 0/73 dead transitions. [2024-11-19 09:42:52,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 73 transitions, 374 flow [2024-11-19 09:42:52,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:42:52,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:42:52,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 161 transitions. [2024-11-19 09:42:52,286 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6708333333333333 [2024-11-19 09:42:52,286 INFO L175 Difference]: Start difference. First operand has 50 places, 51 transitions, 174 flow. Second operand 5 states and 161 transitions. [2024-11-19 09:42:52,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 73 transitions, 374 flow [2024-11-19 09:42:52,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 73 transitions, 321 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-11-19 09:42:52,289 INFO L231 Difference]: Finished difference. Result has 51 places, 53 transitions, 170 flow [2024-11-19 09:42:52,289 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=170, PETRI_PLACES=51, PETRI_TRANSITIONS=53} [2024-11-19 09:42:52,292 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 5 predicate places. [2024-11-19 09:42:52,293 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 53 transitions, 170 flow [2024-11-19 09:42:52,294 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:42:52,294 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:42:52,294 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:42:52,294 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-19 09:42:52,294 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-19 09:42:52,295 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:42:52,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1247418631, now seen corresponding path program 1 times [2024-11-19 09:42:52,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:42:52,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801525997] [2024-11-19 09:42:52,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:42:52,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:42:52,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:42:52,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:42:52,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:42:52,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801525997] [2024-11-19 09:42:52,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801525997] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:42:52,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:42:52,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 09:42:52,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566752308] [2024-11-19 09:42:52,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:42:52,366 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:42:52,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:42:52,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:42:52,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:42:52,395 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 48 [2024-11-19 09:42:52,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 53 transitions, 170 flow. Second operand has 5 states, 5 states have (on average 24.4) internal successors, (122), 5 states have internal predecessors, (122), 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) [2024-11-19 09:42:52,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:42:52,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 48 [2024-11-19 09:42:52,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:42:52,500 INFO L124 PetriNetUnfolderBase]: 263/630 cut-off events. [2024-11-19 09:42:52,501 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2024-11-19 09:42:52,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1144 conditions, 630 events. 263/630 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 3542 event pairs, 123 based on Foata normal form. 9/432 useless extension candidates. Maximal degree in co-relation 672. Up to 263 conditions per place. [2024-11-19 09:42:52,504 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 42 selfloop transitions, 8 changer transitions 0/66 dead transitions. [2024-11-19 09:42:52,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 66 transitions, 300 flow [2024-11-19 09:42:52,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:42:52,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:42:52,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 155 transitions. [2024-11-19 09:42:52,505 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6458333333333334 [2024-11-19 09:42:52,505 INFO L175 Difference]: Start difference. First operand has 51 places, 53 transitions, 170 flow. Second operand 5 states and 155 transitions. [2024-11-19 09:42:52,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 66 transitions, 300 flow [2024-11-19 09:42:52,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 66 transitions, 295 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:42:52,507 INFO L231 Difference]: Finished difference. Result has 54 places, 53 transitions, 185 flow [2024-11-19 09:42:52,507 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=185, PETRI_PLACES=54, PETRI_TRANSITIONS=53} [2024-11-19 09:42:52,508 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 8 predicate places. [2024-11-19 09:42:52,508 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 53 transitions, 185 flow [2024-11-19 09:42:52,508 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.4) internal successors, (122), 5 states have internal predecessors, (122), 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) [2024-11-19 09:42:52,508 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:42:52,512 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:42:52,512 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-19 09:42:52,512 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-19 09:42:52,513 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:42:52,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1979191576, now seen corresponding path program 1 times [2024-11-19 09:42:52,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:42:52,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351670399] [2024-11-19 09:42:52,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:42:52,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:42:52,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:42:52,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:42:52,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:42:52,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351670399] [2024-11-19 09:42:52,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351670399] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:42:52,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:42:52,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:42:52,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121959849] [2024-11-19 09:42:52,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:42:52,571 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:42:52,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:42:52,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:42:52,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:42:52,600 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 48 [2024-11-19 09:42:52,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 53 transitions, 185 flow. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 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) [2024-11-19 09:42:52,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:42:52,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 48 [2024-11-19 09:42:52,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:42:52,685 INFO L124 PetriNetUnfolderBase]: 289/658 cut-off events. [2024-11-19 09:42:52,685 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2024-11-19 09:42:52,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1243 conditions, 658 events. 289/658 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3683 event pairs, 162 based on Foata normal form. 0/524 useless extension candidates. Maximal degree in co-relation 519. Up to 475 conditions per place. [2024-11-19 09:42:52,688 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 33 selfloop transitions, 5 changer transitions 0/51 dead transitions. [2024-11-19 09:42:52,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 51 transitions, 257 flow [2024-11-19 09:42:52,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:42:52,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:42:52,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 98 transitions. [2024-11-19 09:42:52,689 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5104166666666666 [2024-11-19 09:42:52,689 INFO L175 Difference]: Start difference. First operand has 54 places, 53 transitions, 185 flow. Second operand 4 states and 98 transitions. [2024-11-19 09:42:52,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 51 transitions, 257 flow [2024-11-19 09:42:52,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 51 transitions, 250 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:42:52,691 INFO L231 Difference]: Finished difference. Result has 53 places, 51 transitions, 184 flow [2024-11-19 09:42:52,691 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=184, PETRI_PLACES=53, PETRI_TRANSITIONS=51} [2024-11-19 09:42:52,692 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 7 predicate places. [2024-11-19 09:42:52,692 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 51 transitions, 184 flow [2024-11-19 09:42:52,692 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 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) [2024-11-19 09:42:52,692 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:42:52,692 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:42:52,692 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-19 09:42:52,693 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-19 09:42:52,693 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:42:52,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1979191577, now seen corresponding path program 1 times [2024-11-19 09:42:52,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:42:52,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278464499] [2024-11-19 09:42:52,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:42:52,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:42:52,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:42:52,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:42:52,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:42:52,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278464499] [2024-11-19 09:42:52,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278464499] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:42:52,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:42:52,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:42:52,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663633656] [2024-11-19 09:42:52,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:42:52,732 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:42:52,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:42:52,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:42:52,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:42:52,745 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 48 [2024-11-19 09:42:52,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 51 transitions, 184 flow. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 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) [2024-11-19 09:42:52,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:42:52,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 48 [2024-11-19 09:42:52,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:42:52,819 INFO L124 PetriNetUnfolderBase]: 215/441 cut-off events. [2024-11-19 09:42:52,819 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-11-19 09:42:52,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 901 conditions, 441 events. 215/441 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2141 event pairs, 124 based on Foata normal form. 0/332 useless extension candidates. Maximal degree in co-relation 482. Up to 274 conditions per place. [2024-11-19 09:42:52,822 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 50 selfloop transitions, 5 changer transitions 0/69 dead transitions. [2024-11-19 09:42:52,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 69 transitions, 352 flow [2024-11-19 09:42:52,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:42:52,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:42:52,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 159 transitions. [2024-11-19 09:42:52,823 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6625 [2024-11-19 09:42:52,823 INFO L175 Difference]: Start difference. First operand has 53 places, 51 transitions, 184 flow. Second operand 5 states and 159 transitions. [2024-11-19 09:42:52,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 69 transitions, 352 flow [2024-11-19 09:42:52,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 69 transitions, 344 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:42:52,825 INFO L231 Difference]: Finished difference. Result has 56 places, 51 transitions, 192 flow [2024-11-19 09:42:52,828 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=192, PETRI_PLACES=56, PETRI_TRANSITIONS=51} [2024-11-19 09:42:52,829 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 10 predicate places. [2024-11-19 09:42:52,829 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 51 transitions, 192 flow [2024-11-19 09:42:52,829 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 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) [2024-11-19 09:42:52,829 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:42:52,829 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:42:52,829 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-19 09:42:52,829 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-19 09:42:52,830 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:42:52,830 INFO L85 PathProgramCache]: Analyzing trace with hash -2071010136, now seen corresponding path program 1 times [2024-11-19 09:42:52,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:42:52,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915826029] [2024-11-19 09:42:52,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:42:52,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:42:52,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:42:52,899 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:42:52,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:42:52,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915826029] [2024-11-19 09:42:52,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915826029] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:42:52,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:42:52,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:42:52,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681148211] [2024-11-19 09:42:52,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:42:52,900 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:42:52,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:42:52,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:42:52,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:42:52,929 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 48 [2024-11-19 09:42:52,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 51 transitions, 192 flow. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 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) [2024-11-19 09:42:52,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:42:52,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 48 [2024-11-19 09:42:52,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:42:52,985 INFO L124 PetriNetUnfolderBase]: 227/522 cut-off events. [2024-11-19 09:42:52,985 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-11-19 09:42:52,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1046 conditions, 522 events. 227/522 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2690 event pairs, 138 based on Foata normal form. 0/440 useless extension candidates. Maximal degree in co-relation 766. Up to 389 conditions per place. [2024-11-19 09:42:52,987 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 30 selfloop transitions, 8 changer transitions 0/49 dead transitions. [2024-11-19 09:42:52,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 49 transitions, 264 flow [2024-11-19 09:42:52,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:42:52,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:42:52,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 116 transitions. [2024-11-19 09:42:52,988 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48333333333333334 [2024-11-19 09:42:52,988 INFO L175 Difference]: Start difference. First operand has 56 places, 51 transitions, 192 flow. Second operand 5 states and 116 transitions. [2024-11-19 09:42:52,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 49 transitions, 264 flow [2024-11-19 09:42:52,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 49 transitions, 256 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-19 09:42:52,989 INFO L231 Difference]: Finished difference. Result has 55 places, 49 transitions, 196 flow [2024-11-19 09:42:52,990 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=196, PETRI_PLACES=55, PETRI_TRANSITIONS=49} [2024-11-19 09:42:52,990 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 9 predicate places. [2024-11-19 09:42:52,990 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 49 transitions, 196 flow [2024-11-19 09:42:52,990 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 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) [2024-11-19 09:42:52,990 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:42:52,990 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:42:52,990 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-19 09:42:52,991 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-19 09:42:52,991 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:42:52,991 INFO L85 PathProgramCache]: Analyzing trace with hash -2071010135, now seen corresponding path program 1 times [2024-11-19 09:42:52,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:42:52,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283591402] [2024-11-19 09:42:52,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:42:52,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:42:53,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:42:53,128 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:42:53,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:42:53,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283591402] [2024-11-19 09:42:53,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283591402] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:42:53,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728849337] [2024-11-19 09:42:53,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:42:53,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:42:53,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:42:53,131 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) [2024-11-19 09:42:53,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-19 09:42:53,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:42:53,181 INFO L255 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-19 09:42:53,182 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:42:53,194 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 [2024-11-19 09:42:53,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 09:42:53,232 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 [2024-11-19 09:42:53,244 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-19 09:42:53,244 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 [2024-11-19 09:42:53,281 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:42:53,282 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:42:53,388 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 61 treesize of output 57 [2024-11-19 09:42:53,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:42:53,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728849337] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:42:53,461 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:42:53,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-19 09:42:53,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090802794] [2024-11-19 09:42:53,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:42:53,462 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-19 09:42:53,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:42:53,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-19 09:42:53,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-11-19 09:42:53,852 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-19 09:42:53,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 49 transitions, 196 flow. Second operand has 11 states, 11 states have (on average 22.454545454545453) internal successors, (247), 11 states have internal predecessors, (247), 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) [2024-11-19 09:42:53,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:42:53,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-19 09:42:53,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:42:54,150 INFO L124 PetriNetUnfolderBase]: 325/708 cut-off events. [2024-11-19 09:42:54,151 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2024-11-19 09:42:54,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1382 conditions, 708 events. 325/708 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3671 event pairs, 147 based on Foata normal form. 0/534 useless extension candidates. Maximal degree in co-relation 858. Up to 233 conditions per place. [2024-11-19 09:42:54,154 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 57 selfloop transitions, 15 changer transitions 0/83 dead transitions. [2024-11-19 09:42:54,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 83 transitions, 435 flow [2024-11-19 09:42:54,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-19 09:42:54,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-19 09:42:54,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 224 transitions. [2024-11-19 09:42:54,155 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-11-19 09:42:54,155 INFO L175 Difference]: Start difference. First operand has 55 places, 49 transitions, 196 flow. Second operand 8 states and 224 transitions. [2024-11-19 09:42:54,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 83 transitions, 435 flow [2024-11-19 09:42:54,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 83 transitions, 421 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-19 09:42:54,157 INFO L231 Difference]: Finished difference. Result has 61 places, 53 transitions, 245 flow [2024-11-19 09:42:54,157 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=245, PETRI_PLACES=61, PETRI_TRANSITIONS=53} [2024-11-19 09:42:54,158 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 15 predicate places. [2024-11-19 09:42:54,158 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 53 transitions, 245 flow [2024-11-19 09:42:54,158 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 22.454545454545453) internal successors, (247), 11 states have internal predecessors, (247), 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) [2024-11-19 09:42:54,158 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:42:54,159 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:42:54,172 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-19 09:42:54,362 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:42:54,363 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-19 09:42:54,363 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:42:54,363 INFO L85 PathProgramCache]: Analyzing trace with hash 466777907, now seen corresponding path program 1 times [2024-11-19 09:42:54,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:42:54,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162375177] [2024-11-19 09:42:54,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:42:54,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:42:54,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:42:54,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:42:54,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:42:54,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162375177] [2024-11-19 09:42:54,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162375177] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:42:54,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:42:54,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 09:42:54,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165590446] [2024-11-19 09:42:54,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:42:54,443 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:42:54,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:42:54,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:42:54,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:42:54,470 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 48 [2024-11-19 09:42:54,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 53 transitions, 245 flow. Second operand has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 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) [2024-11-19 09:42:54,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:42:54,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 48 [2024-11-19 09:42:54,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:42:54,558 INFO L124 PetriNetUnfolderBase]: 361/779 cut-off events. [2024-11-19 09:42:54,559 INFO L125 PetriNetUnfolderBase]: For 201/215 co-relation queries the response was YES. [2024-11-19 09:42:54,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1624 conditions, 779 events. 361/779 cut-off events. For 201/215 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 4063 event pairs, 162 based on Foata normal form. 5/667 useless extension candidates. Maximal degree in co-relation 1188. Up to 305 conditions per place. [2024-11-19 09:42:54,562 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 56 selfloop transitions, 9 changer transitions 0/78 dead transitions. [2024-11-19 09:42:54,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 78 transitions, 440 flow [2024-11-19 09:42:54,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:42:54,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:42:54,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 166 transitions. [2024-11-19 09:42:54,563 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6916666666666667 [2024-11-19 09:42:54,563 INFO L175 Difference]: Start difference. First operand has 61 places, 53 transitions, 245 flow. Second operand 5 states and 166 transitions. [2024-11-19 09:42:54,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 78 transitions, 440 flow [2024-11-19 09:42:54,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 78 transitions, 422 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-19 09:42:54,565 INFO L231 Difference]: Finished difference. Result has 64 places, 54 transitions, 260 flow [2024-11-19 09:42:54,565 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=260, PETRI_PLACES=64, PETRI_TRANSITIONS=54} [2024-11-19 09:42:54,566 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 18 predicate places. [2024-11-19 09:42:54,566 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 54 transitions, 260 flow [2024-11-19 09:42:54,566 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 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) [2024-11-19 09:42:54,566 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:42:54,566 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:42:54,566 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-19 09:42:54,566 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-19 09:42:54,567 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:42:54,567 INFO L85 PathProgramCache]: Analyzing trace with hash 223195645, now seen corresponding path program 1 times [2024-11-19 09:42:54,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:42:54,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563837859] [2024-11-19 09:42:54,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:42:54,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:42:54,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:42:54,659 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:42:54,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:42:54,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563837859] [2024-11-19 09:42:54,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563837859] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:42:54,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244473224] [2024-11-19 09:42:54,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:42:54,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:42:54,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:42:54,661 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) [2024-11-19 09:42:54,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-19 09:42:54,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:42:54,722 INFO L255 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-19 09:42:54,723 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:42:54,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:42:54,783 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:42:54,822 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 29 treesize of output 25 [2024-11-19 09:42:54,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:42:54,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244473224] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:42:54,849 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:42:54,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2024-11-19 09:42:54,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188613071] [2024-11-19 09:42:54,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:42:54,850 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-19 09:42:54,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:42:54,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-19 09:42:54,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-11-19 09:42:55,043 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2024-11-19 09:42:55,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 54 transitions, 260 flow. Second operand has 12 states, 12 states have (on average 23.75) internal successors, (285), 12 states have internal predecessors, (285), 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) [2024-11-19 09:42:55,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:42:55,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2024-11-19 09:42:55,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:42:55,256 INFO L124 PetriNetUnfolderBase]: 375/764 cut-off events. [2024-11-19 09:42:55,256 INFO L125 PetriNetUnfolderBase]: For 165/165 co-relation queries the response was YES. [2024-11-19 09:42:55,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1737 conditions, 764 events. 375/764 cut-off events. For 165/165 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 3734 event pairs, 130 based on Foata normal form. 0/692 useless extension candidates. Maximal degree in co-relation 1272. Up to 226 conditions per place. [2024-11-19 09:42:55,259 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 65 selfloop transitions, 15 changer transitions 0/92 dead transitions. [2024-11-19 09:42:55,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 92 transitions, 516 flow [2024-11-19 09:42:55,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 09:42:55,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-19 09:42:55,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 222 transitions. [2024-11-19 09:42:55,261 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6607142857142857 [2024-11-19 09:42:55,261 INFO L175 Difference]: Start difference. First operand has 64 places, 54 transitions, 260 flow. Second operand 7 states and 222 transitions. [2024-11-19 09:42:55,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 92 transitions, 516 flow [2024-11-19 09:42:55,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 92 transitions, 505 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:42:55,263 INFO L231 Difference]: Finished difference. Result has 70 places, 55 transitions, 296 flow [2024-11-19 09:42:55,263 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=296, PETRI_PLACES=70, PETRI_TRANSITIONS=55} [2024-11-19 09:42:55,263 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 24 predicate places. [2024-11-19 09:42:55,263 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 55 transitions, 296 flow [2024-11-19 09:42:55,264 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 23.75) internal successors, (285), 12 states have internal predecessors, (285), 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) [2024-11-19 09:42:55,264 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:42:55,264 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:42:55,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-19 09:42:55,467 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:42:55,468 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-19 09:42:55,468 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:42:55,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1677533548, now seen corresponding path program 1 times [2024-11-19 09:42:55,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:42:55,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025472668] [2024-11-19 09:42:55,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:42:55,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:42:55,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:42:55,613 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:42:55,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:42:55,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025472668] [2024-11-19 09:42:55,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025472668] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:42:55,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945776703] [2024-11-19 09:42:55,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:42:55,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:42:55,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:42:55,615 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) [2024-11-19 09:42:55,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-19 09:42:55,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:42:55,673 INFO L255 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-19 09:42:55,674 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:42:55,734 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:42:55,734 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:42:55,771 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 29 treesize of output 25 [2024-11-19 09:42:55,794 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:42:55,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945776703] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:42:55,794 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:42:55,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2024-11-19 09:42:55,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185484903] [2024-11-19 09:42:55,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:42:55,795 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-19 09:42:55,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:42:55,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-19 09:42:55,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2024-11-19 09:42:55,994 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2024-11-19 09:42:55,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 55 transitions, 296 flow. Second operand has 12 states, 12 states have (on average 24.25) internal successors, (291), 12 states have internal predecessors, (291), 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) [2024-11-19 09:42:55,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:42:55,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2024-11-19 09:42:55,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:42:56,202 INFO L124 PetriNetUnfolderBase]: 429/888 cut-off events. [2024-11-19 09:42:56,202 INFO L125 PetriNetUnfolderBase]: For 881/941 co-relation queries the response was YES. [2024-11-19 09:42:56,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2022 conditions, 888 events. 429/888 cut-off events. For 881/941 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 4591 event pairs, 162 based on Foata normal form. 0/803 useless extension candidates. Maximal degree in co-relation 1546. Up to 288 conditions per place. [2024-11-19 09:42:56,206 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 61 selfloop transitions, 15 changer transitions 0/89 dead transitions. [2024-11-19 09:42:56,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 89 transitions, 552 flow [2024-11-19 09:42:56,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 09:42:56,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-19 09:42:56,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 218 transitions. [2024-11-19 09:42:56,207 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6488095238095238 [2024-11-19 09:42:56,207 INFO L175 Difference]: Start difference. First operand has 70 places, 55 transitions, 296 flow. Second operand 7 states and 218 transitions. [2024-11-19 09:42:56,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 89 transitions, 552 flow [2024-11-19 09:42:56,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 89 transitions, 531 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-19 09:42:56,209 INFO L231 Difference]: Finished difference. Result has 75 places, 56 transitions, 322 flow [2024-11-19 09:42:56,209 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=277, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=322, PETRI_PLACES=75, PETRI_TRANSITIONS=56} [2024-11-19 09:42:56,209 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 29 predicate places. [2024-11-19 09:42:56,209 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 56 transitions, 322 flow [2024-11-19 09:42:56,210 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 24.25) internal successors, (291), 12 states have internal predecessors, (291), 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) [2024-11-19 09:42:56,210 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:42:56,210 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:42:56,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-19 09:42:56,413 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,SelfDestructingSolverStorable13 [2024-11-19 09:42:56,414 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-19 09:42:56,414 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:42:56,414 INFO L85 PathProgramCache]: Analyzing trace with hash -463932034, now seen corresponding path program 1 times [2024-11-19 09:42:56,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:42:56,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999855976] [2024-11-19 09:42:56,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:42:56,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:42:56,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:42:56,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:42:56,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:42:56,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999855976] [2024-11-19 09:42:56,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999855976] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:42:56,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052436136] [2024-11-19 09:42:56,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:42:56,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:42:56,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:42:56,541 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) [2024-11-19 09:42:56,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-19 09:42:56,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:42:56,598 INFO L255 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-19 09:42:56,599 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:42:56,606 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 [2024-11-19 09:42:56,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 09:42:56,645 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 [2024-11-19 09:42:56,650 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-19 09:42:56,650 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 [2024-11-19 09:42:56,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:42:56,697 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:42:56,774 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 61 treesize of output 57 [2024-11-19 09:42:56,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:42:56,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052436136] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:42:56,816 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:42:56,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-19 09:42:56,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926925217] [2024-11-19 09:42:56,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:42:56,817 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-19 09:42:56,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:42:56,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-19 09:42:56,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-11-19 09:43:00,881 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] [2024-11-19 09:43:04,957 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-19 09:43:08,997 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-19 09:43:13,127 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] [2024-11-19 09:43:13,127 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 48 [2024-11-19 09:43:13,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 56 transitions, 322 flow. Second operand has 11 states, 11 states have (on average 19.0) internal successors, (209), 11 states have internal predecessors, (209), 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) [2024-11-19 09:43:13,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:43:13,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 48 [2024-11-19 09:43:13,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:43:13,364 INFO L124 PetriNetUnfolderBase]: 429/835 cut-off events. [2024-11-19 09:43:13,364 INFO L125 PetriNetUnfolderBase]: For 901/961 co-relation queries the response was YES. [2024-11-19 09:43:13,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2016 conditions, 835 events. 429/835 cut-off events. For 901/961 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 4122 event pairs, 230 based on Foata normal form. 0/778 useless extension candidates. Maximal degree in co-relation 1531. Up to 323 conditions per place. [2024-11-19 09:43:13,368 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 58 selfloop transitions, 15 changer transitions 0/87 dead transitions. [2024-11-19 09:43:13,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 87 transitions, 572 flow [2024-11-19 09:43:13,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-19 09:43:13,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-19 09:43:13,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-11-19 09:43:13,369 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4947916666666667 [2024-11-19 09:43:13,369 INFO L175 Difference]: Start difference. First operand has 75 places, 56 transitions, 322 flow. Second operand 8 states and 190 transitions. [2024-11-19 09:43:13,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 87 transitions, 572 flow [2024-11-19 09:43:13,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 87 transitions, 539 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-11-19 09:43:13,372 INFO L231 Difference]: Finished difference. Result has 80 places, 57 transitions, 336 flow [2024-11-19 09:43:13,372 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=336, PETRI_PLACES=80, PETRI_TRANSITIONS=57} [2024-11-19 09:43:13,372 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 34 predicate places. [2024-11-19 09:43:13,372 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 57 transitions, 336 flow [2024-11-19 09:43:13,373 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 19.0) internal successors, (209), 11 states have internal predecessors, (209), 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) [2024-11-19 09:43:13,373 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:43:13,373 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:43:13,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-19 09:43:13,574 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-19 09:43:13,574 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-19 09:43:13,575 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:43:13,575 INFO L85 PathProgramCache]: Analyzing trace with hash 612475950, now seen corresponding path program 1 times [2024-11-19 09:43:13,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:43:13,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539984289] [2024-11-19 09:43:13,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:43:13,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:43:13,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:43:13,670 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:43:13,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:43:13,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539984289] [2024-11-19 09:43:13,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539984289] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:43:13,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125817164] [2024-11-19 09:43:13,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:43:13,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:43:13,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:43:13,672 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) [2024-11-19 09:43:13,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-19 09:43:13,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:43:13,727 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-19 09:43:13,728 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:43:13,793 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:43:13,794 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:43:13,849 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:43:13,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125817164] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:43:13,850 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:43:13,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 14 [2024-11-19 09:43:13,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121701659] [2024-11-19 09:43:13,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:43:13,851 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-19 09:43:13,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:43:13,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-19 09:43:13,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2024-11-19 09:43:13,969 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 48 [2024-11-19 09:43:13,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 57 transitions, 336 flow. Second operand has 15 states, 15 states have (on average 25.0) internal successors, (375), 15 states have internal predecessors, (375), 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) [2024-11-19 09:43:13,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:43:13,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 48 [2024-11-19 09:43:13,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:43:14,506 INFO L124 PetriNetUnfolderBase]: 1085/2176 cut-off events. [2024-11-19 09:43:14,506 INFO L125 PetriNetUnfolderBase]: For 3132/3345 co-relation queries the response was YES. [2024-11-19 09:43:14,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5474 conditions, 2176 events. 1085/2176 cut-off events. For 3132/3345 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 13912 event pairs, 674 based on Foata normal form. 54/2067 useless extension candidates. Maximal degree in co-relation 2910. Up to 553 conditions per place. [2024-11-19 09:43:14,518 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 158 selfloop transitions, 32 changer transitions 0/206 dead transitions. [2024-11-19 09:43:14,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 206 transitions, 1242 flow [2024-11-19 09:43:14,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-19 09:43:14,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-11-19 09:43:14,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 806 transitions. [2024-11-19 09:43:14,522 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6219135802469136 [2024-11-19 09:43:14,522 INFO L175 Difference]: Start difference. First operand has 80 places, 57 transitions, 336 flow. Second operand 27 states and 806 transitions. [2024-11-19 09:43:14,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 206 transitions, 1242 flow [2024-11-19 09:43:14,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 206 transitions, 1212 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-19 09:43:14,528 INFO L231 Difference]: Finished difference. Result has 105 places, 70 transitions, 496 flow [2024-11-19 09:43:14,529 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=317, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=496, PETRI_PLACES=105, PETRI_TRANSITIONS=70} [2024-11-19 09:43:14,529 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 59 predicate places. [2024-11-19 09:43:14,529 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 70 transitions, 496 flow [2024-11-19 09:43:14,530 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 25.0) internal successors, (375), 15 states have internal predecessors, (375), 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) [2024-11-19 09:43:14,530 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:43:14,530 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:43:14,544 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-19 09:43:14,734 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:43:14,735 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-19 09:43:14,735 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:43:14,735 INFO L85 PathProgramCache]: Analyzing trace with hash 205935513, now seen corresponding path program 1 times [2024-11-19 09:43:14,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:43:14,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098921992] [2024-11-19 09:43:14,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:43:14,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:43:14,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:43:14,842 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:43:14,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:43:14,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098921992] [2024-11-19 09:43:14,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098921992] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:43:14,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108036409] [2024-11-19 09:43:14,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:43:14,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:43:14,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:43:14,844 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) [2024-11-19 09:43:14,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-19 09:43:14,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:43:14,909 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-19 09:43:14,910 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:43:14,985 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:43:14,986 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:43:15,052 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:43:15,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108036409] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:43:15,052 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:43:15,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 14 [2024-11-19 09:43:15,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175839754] [2024-11-19 09:43:15,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:43:15,053 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-19 09:43:15,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:43:15,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-19 09:43:15,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-11-19 09:43:15,224 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 48 [2024-11-19 09:43:15,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 70 transitions, 496 flow. Second operand has 15 states, 15 states have (on average 25.6) internal successors, (384), 15 states have internal predecessors, (384), 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) [2024-11-19 09:43:15,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:43:15,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 48 [2024-11-19 09:43:15,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:43:15,704 INFO L124 PetriNetUnfolderBase]: 901/1846 cut-off events. [2024-11-19 09:43:15,705 INFO L125 PetriNetUnfolderBase]: For 3446/3672 co-relation queries the response was YES. [2024-11-19 09:43:15,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4720 conditions, 1846 events. 901/1846 cut-off events. For 3446/3672 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 11490 event pairs, 413 based on Foata normal form. 42/1797 useless extension candidates. Maximal degree in co-relation 2552. Up to 320 conditions per place. [2024-11-19 09:43:15,715 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 172 selfloop transitions, 29 changer transitions 0/217 dead transitions. [2024-11-19 09:43:15,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 217 transitions, 1341 flow [2024-11-19 09:43:15,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-19 09:43:15,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-11-19 09:43:15,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 800 transitions. [2024-11-19 09:43:15,716 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6410256410256411 [2024-11-19 09:43:15,717 INFO L175 Difference]: Start difference. First operand has 105 places, 70 transitions, 496 flow. Second operand 26 states and 800 transitions. [2024-11-19 09:43:15,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 217 transitions, 1341 flow [2024-11-19 09:43:15,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 217 transitions, 1318 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-19 09:43:15,721 INFO L231 Difference]: Finished difference. Result has 128 places, 76 transitions, 591 flow [2024-11-19 09:43:15,721 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=473, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=591, PETRI_PLACES=128, PETRI_TRANSITIONS=76} [2024-11-19 09:43:15,722 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 82 predicate places. [2024-11-19 09:43:15,722 INFO L471 AbstractCegarLoop]: Abstraction has has 128 places, 76 transitions, 591 flow [2024-11-19 09:43:15,722 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 25.6) internal successors, (384), 15 states have internal predecessors, (384), 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) [2024-11-19 09:43:15,722 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:43:15,722 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:43:15,734 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-19 09:43:15,923 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,SelfDestructingSolverStorable16 [2024-11-19 09:43:15,923 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-19 09:43:15,924 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:43:15,924 INFO L85 PathProgramCache]: Analyzing trace with hash 251945921, now seen corresponding path program 1 times [2024-11-19 09:43:15,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:43:15,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183217132] [2024-11-19 09:43:15,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:43:15,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:43:15,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:43:16,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:43:16,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:43:16,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183217132] [2024-11-19 09:43:16,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183217132] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:43:16,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:43:16,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:43:16,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599686914] [2024-11-19 09:43:16,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:43:16,013 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:43:16,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:43:16,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:43:16,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:43:16,038 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 48 [2024-11-19 09:43:16,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 76 transitions, 591 flow. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 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) [2024-11-19 09:43:16,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:43:16,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 48 [2024-11-19 09:43:16,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:43:16,197 INFO L124 PetriNetUnfolderBase]: 783/1640 cut-off events. [2024-11-19 09:43:16,197 INFO L125 PetriNetUnfolderBase]: For 4055/4310 co-relation queries the response was YES. [2024-11-19 09:43:16,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4311 conditions, 1640 events. 783/1640 cut-off events. For 4055/4310 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 10035 event pairs, 293 based on Foata normal form. 9/1542 useless extension candidates. Maximal degree in co-relation 2223. Up to 904 conditions per place. [2024-11-19 09:43:16,204 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 56 selfloop transitions, 9 changer transitions 13/95 dead transitions. [2024-11-19 09:43:16,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 95 transitions, 874 flow [2024-11-19 09:43:16,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:43:16,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:43:16,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 108 transitions. [2024-11-19 09:43:16,205 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.75 [2024-11-19 09:43:16,205 INFO L175 Difference]: Start difference. First operand has 128 places, 76 transitions, 591 flow. Second operand 3 states and 108 transitions. [2024-11-19 09:43:16,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 95 transitions, 874 flow [2024-11-19 09:43:16,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 95 transitions, 841 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-11-19 09:43:16,209 INFO L231 Difference]: Finished difference. Result has 121 places, 72 transitions, 563 flow [2024-11-19 09:43:16,209 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=559, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=563, PETRI_PLACES=121, PETRI_TRANSITIONS=72} [2024-11-19 09:43:16,210 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 75 predicate places. [2024-11-19 09:43:16,210 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 72 transitions, 563 flow [2024-11-19 09:43:16,210 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 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) [2024-11-19 09:43:16,210 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:43:16,210 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:43:16,211 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-19 09:43:16,211 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-19 09:43:16,212 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:43:16,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1015357225, now seen corresponding path program 2 times [2024-11-19 09:43:16,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:43:16,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220990130] [2024-11-19 09:43:16,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:43:16,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:43:16,227 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:43:16,227 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:43:16,413 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-19 09:43:16,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:43:16,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220990130] [2024-11-19 09:43:16,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220990130] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:43:16,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125735716] [2024-11-19 09:43:16,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:43:16,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:43:16,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:43:16,416 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) [2024-11-19 09:43:16,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-19 09:43:16,477 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:43:16,477 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:43:16,478 INFO L255 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-19 09:43:16,480 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:43:16,488 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 [2024-11-19 09:43:16,597 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-19 09:43:16,597 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2024-11-19 09:43:16,616 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-19 09:43:16,616 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 [2024-11-19 09:43:16,735 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 09:43:16,735 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:43:16,913 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 61 treesize of output 57 [2024-11-19 09:43:17,030 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 09:43:17,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125735716] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:43:17,030 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:43:17,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 16 [2024-11-19 09:43:17,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676000315] [2024-11-19 09:43:17,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:43:17,031 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-19 09:43:17,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:43:17,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-19 09:43:17,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2024-11-19 09:43:21,115 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] [2024-11-19 09:43:25,556 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-19 09:43:29,613 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-19 09:43:29,877 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 48 [2024-11-19 09:43:29,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 72 transitions, 563 flow. Second operand has 18 states, 18 states have (on average 19.5) internal successors, (351), 18 states have internal predecessors, (351), 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) [2024-11-19 09:43:29,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:43:29,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 48 [2024-11-19 09:43:29,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:43:30,626 INFO L124 PetriNetUnfolderBase]: 1182/2287 cut-off events. [2024-11-19 09:43:30,626 INFO L125 PetriNetUnfolderBase]: For 6905/7118 co-relation queries the response was YES. [2024-11-19 09:43:30,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6601 conditions, 2287 events. 1182/2287 cut-off events. For 6905/7118 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 14020 event pairs, 332 based on Foata normal form. 40/2225 useless extension candidates. Maximal degree in co-relation 4242. Up to 486 conditions per place. [2024-11-19 09:43:30,643 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 104 selfloop transitions, 25 changer transitions 0/142 dead transitions. [2024-11-19 09:43:30,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 142 transitions, 1102 flow [2024-11-19 09:43:30,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-19 09:43:30,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-19 09:43:30,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 404 transitions. [2024-11-19 09:43:30,646 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4950980392156863 [2024-11-19 09:43:30,646 INFO L175 Difference]: Start difference. First operand has 121 places, 72 transitions, 563 flow. Second operand 17 states and 404 transitions. [2024-11-19 09:43:30,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 142 transitions, 1102 flow [2024-11-19 09:43:30,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 142 transitions, 995 flow, removed 10 selfloop flow, removed 15 redundant places. [2024-11-19 09:43:30,651 INFO L231 Difference]: Finished difference. Result has 105 places, 75 transitions, 572 flow [2024-11-19 09:43:30,652 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=473, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=572, PETRI_PLACES=105, PETRI_TRANSITIONS=75} [2024-11-19 09:43:30,652 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 59 predicate places. [2024-11-19 09:43:30,653 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 75 transitions, 572 flow [2024-11-19 09:43:30,653 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 19.5) internal successors, (351), 18 states have internal predecessors, (351), 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) [2024-11-19 09:43:30,653 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:43:30,653 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:43:30,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-19 09:43:30,853 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:43:30,854 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-19 09:43:30,854 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:43:30,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1411303293, now seen corresponding path program 1 times [2024-11-19 09:43:30,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:43:30,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268473380] [2024-11-19 09:43:30,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:43:30,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:43:30,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:43:31,035 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 09:43:31,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:43:31,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268473380] [2024-11-19 09:43:31,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268473380] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:43:31,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728604514] [2024-11-19 09:43:31,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:43:31,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:43:31,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:43:31,038 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) [2024-11-19 09:43:31,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-19 09:43:31,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:43:31,098 INFO L255 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-19 09:43:31,099 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:43:31,208 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 09:43:31,209 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:43:31,276 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 30 treesize of output 26 [2024-11-19 09:43:31,340 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 09:43:31,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728604514] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:43:31,341 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:43:31,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2024-11-19 09:43:31,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673110432] [2024-11-19 09:43:31,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:43:31,341 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-19 09:43:31,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:43:31,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-19 09:43:31,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2024-11-19 09:43:31,747 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2024-11-19 09:43:31,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 75 transitions, 572 flow. Second operand has 19 states, 19 states have (on average 23.894736842105264) internal successors, (454), 19 states have internal predecessors, (454), 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) [2024-11-19 09:43:31,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:43:31,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2024-11-19 09:43:31,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:43:32,128 INFO L124 PetriNetUnfolderBase]: 1098/2140 cut-off events. [2024-11-19 09:43:32,128 INFO L125 PetriNetUnfolderBase]: For 4621/4823 co-relation queries the response was YES. [2024-11-19 09:43:32,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5859 conditions, 2140 events. 1098/2140 cut-off events. For 4621/4823 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 13282 event pairs, 339 based on Foata normal form. 22/2056 useless extension candidates. Maximal degree in co-relation 2866. Up to 462 conditions per place. [2024-11-19 09:43:32,138 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 101 selfloop transitions, 25 changer transitions 0/141 dead transitions. [2024-11-19 09:43:32,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 141 transitions, 1046 flow [2024-11-19 09:43:32,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-19 09:43:32,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-19 09:43:32,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 323 transitions. [2024-11-19 09:43:32,139 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6729166666666667 [2024-11-19 09:43:32,139 INFO L175 Difference]: Start difference. First operand has 105 places, 75 transitions, 572 flow. Second operand 10 states and 323 transitions. [2024-11-19 09:43:32,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 141 transitions, 1046 flow [2024-11-19 09:43:32,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 141 transitions, 1004 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-11-19 09:43:32,145 INFO L231 Difference]: Finished difference. Result has 108 places, 77 transitions, 611 flow [2024-11-19 09:43:32,145 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=530, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=611, PETRI_PLACES=108, PETRI_TRANSITIONS=77} [2024-11-19 09:43:32,145 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 62 predicate places. [2024-11-19 09:43:32,145 INFO L471 AbstractCegarLoop]: Abstraction has has 108 places, 77 transitions, 611 flow [2024-11-19 09:43:32,145 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 23.894736842105264) internal successors, (454), 19 states have internal predecessors, (454), 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) [2024-11-19 09:43:32,146 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:43:32,146 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:43:32,158 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-19 09:43:32,349 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:43:32,350 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-19 09:43:32,350 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:43:32,350 INFO L85 PathProgramCache]: Analyzing trace with hash 827784148, now seen corresponding path program 2 times [2024-11-19 09:43:32,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:43:32,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243173193] [2024-11-19 09:43:32,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:43:32,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:43:32,375 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:43:32,375 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:43:32,577 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-19 09:43:32,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:43:32,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243173193] [2024-11-19 09:43:32,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243173193] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:43:32,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170525402] [2024-11-19 09:43:32,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:43:32,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:43:32,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:43:32,579 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) [2024-11-19 09:43:32,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-19 09:43:32,648 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:43:32,649 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:43:32,652 INFO L255 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-19 09:43:32,653 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:43:32,781 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 09:43:32,782 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:43:32,847 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 30 treesize of output 26 [2024-11-19 09:43:32,914 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 09:43:32,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170525402] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:43:32,914 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:43:32,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 17 [2024-11-19 09:43:32,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814203761] [2024-11-19 09:43:32,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:43:32,915 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-19 09:43:32,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:43:32,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-19 09:43:32,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2024-11-19 09:43:33,459 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 48 [2024-11-19 09:43:33,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 77 transitions, 611 flow. Second operand has 19 states, 19 states have (on average 23.57894736842105) internal successors, (448), 19 states have internal predecessors, (448), 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) [2024-11-19 09:43:33,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:43:33,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 48 [2024-11-19 09:43:33,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:43:34,107 INFO L124 PetriNetUnfolderBase]: 1644/3226 cut-off events. [2024-11-19 09:43:34,107 INFO L125 PetriNetUnfolderBase]: For 9625/9943 co-relation queries the response was YES. [2024-11-19 09:43:34,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8951 conditions, 3226 events. 1644/3226 cut-off events. For 9625/9943 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 21824 event pairs, 491 based on Foata normal form. 62/3226 useless extension candidates. Maximal degree in co-relation 4958. Up to 706 conditions per place. [2024-11-19 09:43:34,121 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 100 selfloop transitions, 25 changer transitions 0/141 dead transitions. [2024-11-19 09:43:34,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 141 transitions, 1164 flow [2024-11-19 09:43:34,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-19 09:43:34,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-19 09:43:34,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 393 transitions. [2024-11-19 09:43:34,122 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5848214285714286 [2024-11-19 09:43:34,122 INFO L175 Difference]: Start difference. First operand has 108 places, 77 transitions, 611 flow. Second operand 14 states and 393 transitions. [2024-11-19 09:43:34,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 141 transitions, 1164 flow [2024-11-19 09:43:34,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 141 transitions, 1120 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-11-19 09:43:34,128 INFO L231 Difference]: Finished difference. Result has 117 places, 79 transitions, 653 flow [2024-11-19 09:43:34,128 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=566, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=653, PETRI_PLACES=117, PETRI_TRANSITIONS=79} [2024-11-19 09:43:34,128 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 71 predicate places. [2024-11-19 09:43:34,129 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 79 transitions, 653 flow [2024-11-19 09:43:34,129 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 23.57894736842105) internal successors, (448), 19 states have internal predecessors, (448), 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) [2024-11-19 09:43:34,129 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:43:34,129 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:43:34,142 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-19 09:43:34,329 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-19 09:43:34,330 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-19 09:43:34,330 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:43:34,330 INFO L85 PathProgramCache]: Analyzing trace with hash -108494786, now seen corresponding path program 1 times [2024-11-19 09:43:34,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:43:34,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757900890] [2024-11-19 09:43:34,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:43:34,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:43:34,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:43:34,556 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 09:43:34,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:43:34,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757900890] [2024-11-19 09:43:34,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757900890] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:43:34,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435675681] [2024-11-19 09:43:34,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:43:34,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:43:34,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:43:34,558 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) [2024-11-19 09:43:34,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-19 09:43:34,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:43:34,621 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-19 09:43:34,623 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:43:34,629 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 [2024-11-19 09:43:34,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 09:43:34,687 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 [2024-11-19 09:43:34,692 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-19 09:43:34,692 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 [2024-11-19 09:43:34,769 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 09:43:34,770 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:43:34,876 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 61 treesize of output 57 [2024-11-19 09:43:34,964 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 09:43:34,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435675681] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:43:34,964 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:43:34,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2024-11-19 09:43:34,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041156078] [2024-11-19 09:43:34,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:43:34,965 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-19 09:43:34,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:43:34,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-19 09:43:34,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2024-11-19 09:43:35,452 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-19 09:43:35,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 79 transitions, 653 flow. Second operand has 17 states, 17 states have (on average 22.647058823529413) internal successors, (385), 17 states have internal predecessors, (385), 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) [2024-11-19 09:43:35,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:43:35,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-19 09:43:35,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:43:35,980 INFO L124 PetriNetUnfolderBase]: 1508/2928 cut-off events. [2024-11-19 09:43:35,981 INFO L125 PetriNetUnfolderBase]: For 9515/9767 co-relation queries the response was YES. [2024-11-19 09:43:35,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8137 conditions, 2928 events. 1508/2928 cut-off events. For 9515/9767 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 19850 event pairs, 712 based on Foata normal form. 31/2830 useless extension candidates. Maximal degree in co-relation 6749. Up to 924 conditions per place. [2024-11-19 09:43:35,992 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 79 selfloop transitions, 25 changer transitions 0/122 dead transitions. [2024-11-19 09:43:35,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 122 transitions, 1092 flow [2024-11-19 09:43:35,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-19 09:43:35,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-19 09:43:35,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 301 transitions. [2024-11-19 09:43:35,995 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5700757575757576 [2024-11-19 09:43:35,995 INFO L175 Difference]: Start difference. First operand has 117 places, 79 transitions, 653 flow. Second operand 11 states and 301 transitions. [2024-11-19 09:43:35,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 122 transitions, 1092 flow [2024-11-19 09:43:35,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 122 transitions, 1050 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-11-19 09:43:36,001 INFO L231 Difference]: Finished difference. Result has 121 places, 81 transitions, 692 flow [2024-11-19 09:43:36,001 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=611, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=692, PETRI_PLACES=121, PETRI_TRANSITIONS=81} [2024-11-19 09:43:36,001 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 75 predicate places. [2024-11-19 09:43:36,001 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 81 transitions, 692 flow [2024-11-19 09:43:36,001 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 22.647058823529413) internal successors, (385), 17 states have internal predecessors, (385), 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) [2024-11-19 09:43:36,002 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:43:36,002 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-19 09:43:36,015 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-19 09:43:36,202 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 [2024-11-19 09:43:36,203 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-19 09:43:36,203 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:43:36,203 INFO L85 PathProgramCache]: Analyzing trace with hash 285030552, now seen corresponding path program 2 times [2024-11-19 09:43:36,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:43:36,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034531865] [2024-11-19 09:43:36,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:43:36,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:43:36,216 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-19 09:43:36,219 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:43:36,332 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-19 09:43:36,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:43:36,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034531865] [2024-11-19 09:43:36,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034531865] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:43:36,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533596944] [2024-11-19 09:43:36,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:43:36,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:43:36,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:43:36,335 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) [2024-11-19 09:43:36,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-19 09:43:36,413 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-19 09:43:36,413 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:43:36,414 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-19 09:43:36,416 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:43:36,443 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 [2024-11-19 09:43:36,662 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-19 09:43:36,662 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:43:36,950 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-19 09:43:36,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533596944] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:43:36,951 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:43:36,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2024-11-19 09:43:36,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869117078] [2024-11-19 09:43:36,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:43:36,952 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-19 09:43:36,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:43:36,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-19 09:43:36,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2024-11-19 09:43:37,379 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-19 09:43:37,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 81 transitions, 692 flow. Second operand has 16 states, 16 states have (on average 22.75) internal successors, (364), 16 states have internal predecessors, (364), 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) [2024-11-19 09:43:37,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:43:37,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-19 09:43:37,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:43:37,836 INFO L124 PetriNetUnfolderBase]: 1924/3626 cut-off events. [2024-11-19 09:43:37,836 INFO L125 PetriNetUnfolderBase]: For 9042/9217 co-relation queries the response was YES. [2024-11-19 09:43:37,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10613 conditions, 3626 events. 1924/3626 cut-off events. For 9042/9217 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 24461 event pairs, 677 based on Foata normal form. 28/3436 useless extension candidates. Maximal degree in co-relation 8745. Up to 1579 conditions per place. [2024-11-19 09:43:37,854 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 75 selfloop transitions, 22 changer transitions 0/110 dead transitions. [2024-11-19 09:43:37,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 110 transitions, 1138 flow [2024-11-19 09:43:37,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 09:43:37,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-19 09:43:37,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-11-19 09:43:37,856 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-11-19 09:43:37,856 INFO L175 Difference]: Start difference. First operand has 121 places, 81 transitions, 692 flow. Second operand 7 states and 184 transitions. [2024-11-19 09:43:37,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 110 transitions, 1138 flow [2024-11-19 09:43:37,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 110 transitions, 1096 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-11-19 09:43:37,866 INFO L231 Difference]: Finished difference. Result has 118 places, 80 transitions, 688 flow [2024-11-19 09:43:37,866 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=644, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=688, PETRI_PLACES=118, PETRI_TRANSITIONS=80} [2024-11-19 09:43:37,866 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 72 predicate places. [2024-11-19 09:43:37,867 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 80 transitions, 688 flow [2024-11-19 09:43:37,868 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 22.75) internal successors, (364), 16 states have internal predecessors, (364), 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) [2024-11-19 09:43:37,868 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:43:37,868 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] [2024-11-19 09:43:37,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-19 09:43:38,072 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 [2024-11-19 09:43:38,073 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-19 09:43:38,073 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:43:38,073 INFO L85 PathProgramCache]: Analyzing trace with hash 826211751, now seen corresponding path program 1 times [2024-11-19 09:43:38,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:43:38,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365363389] [2024-11-19 09:43:38,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:43:38,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:43:38,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:43:38,175 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:43:38,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:43:38,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365363389] [2024-11-19 09:43:38,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365363389] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:43:38,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677307622] [2024-11-19 09:43:38,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:43:38,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:43:38,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:43:38,178 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) [2024-11-19 09:43:38,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-19 09:43:38,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:43:38,254 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-19 09:43:38,254 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:43:38,333 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:43:38,333 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:43:38,409 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:43:38,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677307622] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-19 09:43:38,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-19 09:43:38,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 5] total 15 [2024-11-19 09:43:38,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027205189] [2024-11-19 09:43:38,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:43:38,410 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-19 09:43:38,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:43:38,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-19 09:43:38,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2024-11-19 09:43:38,440 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 48 [2024-11-19 09:43:38,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 80 transitions, 688 flow. Second operand has 6 states, 6 states have (on average 26.166666666666668) internal successors, (157), 6 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:43:38,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:43:38,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 48 [2024-11-19 09:43:38,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:43:38,658 INFO L124 PetriNetUnfolderBase]: 1363/2825 cut-off events. [2024-11-19 09:43:38,659 INFO L125 PetriNetUnfolderBase]: For 10132/10385 co-relation queries the response was YES. [2024-11-19 09:43:38,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8392 conditions, 2825 events. 1363/2825 cut-off events. For 10132/10385 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 20033 event pairs, 477 based on Foata normal form. 69/2714 useless extension candidates. Maximal degree in co-relation 7030. Up to 997 conditions per place. [2024-11-19 09:43:38,672 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 66 selfloop transitions, 18 changer transitions 0/103 dead transitions. [2024-11-19 09:43:38,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 103 transitions, 980 flow [2024-11-19 09:43:38,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 09:43:38,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-19 09:43:38,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 208 transitions. [2024-11-19 09:43:38,673 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-11-19 09:43:38,673 INFO L175 Difference]: Start difference. First operand has 118 places, 80 transitions, 688 flow. Second operand 7 states and 208 transitions. [2024-11-19 09:43:38,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 103 transitions, 980 flow [2024-11-19 09:43:38,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 103 transitions, 926 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-19 09:43:38,680 INFO L231 Difference]: Finished difference. Result has 120 places, 81 transitions, 715 flow [2024-11-19 09:43:38,680 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=644, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=715, PETRI_PLACES=120, PETRI_TRANSITIONS=81} [2024-11-19 09:43:38,680 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 74 predicate places. [2024-11-19 09:43:38,680 INFO L471 AbstractCegarLoop]: Abstraction has has 120 places, 81 transitions, 715 flow [2024-11-19 09:43:38,680 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.166666666666668) internal successors, (157), 6 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:43:38,681 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:43:38,681 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] [2024-11-19 09:43:38,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-19 09:43:38,884 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:43:38,885 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-19 09:43:38,885 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:43:38,885 INFO L85 PathProgramCache]: Analyzing trace with hash 655182661, now seen corresponding path program 1 times [2024-11-19 09:43:38,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:43:38,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255439950] [2024-11-19 09:43:38,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:43:38,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:43:38,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:43:38,994 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:43:38,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:43:38,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255439950] [2024-11-19 09:43:38,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255439950] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:43:38,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830006174] [2024-11-19 09:43:38,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:43:38,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:43:38,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:43:38,997 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:43:38,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-19 09:43:39,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:43:39,060 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-19 09:43:39,062 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:43:39,127 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:43:39,128 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:43:39,178 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:43:39,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830006174] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-19 09:43:39,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-19 09:43:39,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 5] total 13 [2024-11-19 09:43:39,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878811771] [2024-11-19 09:43:39,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:43:39,179 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-19 09:43:39,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:43:39,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-19 09:43:39,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-11-19 09:43:39,204 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 48 [2024-11-19 09:43:39,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 81 transitions, 715 flow. Second operand has 6 states, 6 states have (on average 26.166666666666668) internal successors, (157), 6 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:43:39,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:43:39,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 48 [2024-11-19 09:43:39,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:43:39,423 INFO L124 PetriNetUnfolderBase]: 1094/2317 cut-off events. [2024-11-19 09:43:39,424 INFO L125 PetriNetUnfolderBase]: For 11482/11828 co-relation queries the response was YES. [2024-11-19 09:43:39,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7390 conditions, 2317 events. 1094/2317 cut-off events. For 11482/11828 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 15882 event pairs, 407 based on Foata normal form. 74/2271 useless extension candidates. Maximal degree in co-relation 5808. Up to 848 conditions per place. [2024-11-19 09:43:39,435 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 70 selfloop transitions, 18 changer transitions 0/108 dead transitions. [2024-11-19 09:43:39,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 108 transitions, 1040 flow [2024-11-19 09:43:39,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 09:43:39,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-19 09:43:39,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 212 transitions. [2024-11-19 09:43:39,436 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6309523809523809 [2024-11-19 09:43:39,436 INFO L175 Difference]: Start difference. First operand has 120 places, 81 transitions, 715 flow. Second operand 7 states and 212 transitions. [2024-11-19 09:43:39,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 108 transitions, 1040 flow [2024-11-19 09:43:39,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 108 transitions, 1006 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-11-19 09:43:39,443 INFO L231 Difference]: Finished difference. Result has 123 places, 82 transitions, 757 flow [2024-11-19 09:43:39,443 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=686, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=757, PETRI_PLACES=123, PETRI_TRANSITIONS=82} [2024-11-19 09:43:39,443 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 77 predicate places. [2024-11-19 09:43:39,443 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 82 transitions, 757 flow [2024-11-19 09:43:39,443 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.166666666666668) internal successors, (157), 6 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:43:39,444 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:43:39,444 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:43:39,456 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-19 09:43:39,644 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:43:39,645 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-19 09:43:39,645 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:43:39,645 INFO L85 PathProgramCache]: Analyzing trace with hash 91245529, now seen corresponding path program 2 times [2024-11-19 09:43:39,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:43:39,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620141695] [2024-11-19 09:43:39,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:43:39,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:43:39,659 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-19 09:43:39,659 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:43:39,846 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-19 09:43:39,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:43:39,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620141695] [2024-11-19 09:43:39,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620141695] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:43:39,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605256151] [2024-11-19 09:43:39,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:43:39,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:43:39,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:43:39,850 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:43:39,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-19 09:43:39,921 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-19 09:43:39,922 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:43:39,923 INFO L255 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-19 09:43:39,924 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:43:39,934 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 [2024-11-19 09:43:39,939 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 [2024-11-19 09:43:40,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 09:43:40,044 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 [2024-11-19 09:43:40,049 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-19 09:43:40,049 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 [2024-11-19 09:43:40,275 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-19 09:43:40,275 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:43:40,620 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-19 09:43:40,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605256151] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:43:40,620 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:43:40,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2024-11-19 09:43:40,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947196601] [2024-11-19 09:43:40,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:43:40,621 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-19 09:43:40,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:43:40,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-19 09:43:40,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2024-11-19 09:43:41,186 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 48 [2024-11-19 09:43:41,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 82 transitions, 757 flow. Second operand has 17 states, 17 states have (on average 21.0) internal successors, (357), 17 states have internal predecessors, (357), 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) [2024-11-19 09:43:41,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:43:41,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 48 [2024-11-19 09:43:41,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:43:41,591 INFO L124 PetriNetUnfolderBase]: 1475/2759 cut-off events. [2024-11-19 09:43:41,592 INFO L125 PetriNetUnfolderBase]: For 14501/14936 co-relation queries the response was YES. [2024-11-19 09:43:41,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9116 conditions, 2759 events. 1475/2759 cut-off events. For 14501/14936 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 17961 event pairs, 465 based on Foata normal form. 31/2739 useless extension candidates. Maximal degree in co-relation 7339. Up to 1322 conditions per place. [2024-11-19 09:43:41,601 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 72 selfloop transitions, 23 changer transitions 0/108 dead transitions. [2024-11-19 09:43:41,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 108 transitions, 1232 flow [2024-11-19 09:43:41,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 09:43:41,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-19 09:43:41,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-11-19 09:43:41,605 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49702380952380953 [2024-11-19 09:43:41,605 INFO L175 Difference]: Start difference. First operand has 123 places, 82 transitions, 757 flow. Second operand 7 states and 167 transitions. [2024-11-19 09:43:41,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 108 transitions, 1232 flow [2024-11-19 09:43:41,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 108 transitions, 1172 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-11-19 09:43:41,613 INFO L231 Difference]: Finished difference. Result has 121 places, 81 transitions, 751 flow [2024-11-19 09:43:41,614 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=705, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=751, PETRI_PLACES=121, PETRI_TRANSITIONS=81} [2024-11-19 09:43:41,614 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 75 predicate places. [2024-11-19 09:43:41,614 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 81 transitions, 751 flow [2024-11-19 09:43:41,614 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 21.0) internal successors, (357), 17 states have internal predecessors, (357), 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) [2024-11-19 09:43:41,614 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:43:41,615 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] [2024-11-19 09:43:41,628 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-19 09:43:41,815 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-19 09:43:41,815 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-19 09:43:41,815 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:43:41,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1906942946, now seen corresponding path program 1 times [2024-11-19 09:43:41,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:43:41,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106383916] [2024-11-19 09:43:41,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:43:41,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:43:41,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:43:42,059 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:43:42,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:43:42,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106383916] [2024-11-19 09:43:42,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106383916] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:43:42,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:43:42,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-19 09:43:42,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364875049] [2024-11-19 09:43:42,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:43:42,061 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-19 09:43:42,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:43:42,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-19 09:43:42,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-11-19 09:43:42,237 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-19 09:43:42,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 81 transitions, 751 flow. Second operand has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 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) [2024-11-19 09:43:42,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:43:42,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-19 09:43:42,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:43:42,606 INFO L124 PetriNetUnfolderBase]: 1827/3439 cut-off events. [2024-11-19 09:43:42,606 INFO L125 PetriNetUnfolderBase]: For 12114/12114 co-relation queries the response was YES. [2024-11-19 09:43:42,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11744 conditions, 3439 events. 1827/3439 cut-off events. For 12114/12114 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 21068 event pairs, 481 based on Foata normal form. 20/3447 useless extension candidates. Maximal degree in co-relation 9356. Up to 2654 conditions per place. [2024-11-19 09:43:42,621 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 86 selfloop transitions, 29 changer transitions 15/141 dead transitions. [2024-11-19 09:43:42,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 141 transitions, 1431 flow [2024-11-19 09:43:42,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-19 09:43:42,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-19 09:43:42,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 254 transitions. [2024-11-19 09:43:42,622 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5879629629629629 [2024-11-19 09:43:42,623 INFO L175 Difference]: Start difference. First operand has 121 places, 81 transitions, 751 flow. Second operand 9 states and 254 transitions. [2024-11-19 09:43:42,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 141 transitions, 1431 flow [2024-11-19 09:43:42,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 141 transitions, 1353 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-19 09:43:42,635 INFO L231 Difference]: Finished difference. Result has 129 places, 97 transitions, 1050 flow [2024-11-19 09:43:42,635 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=705, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1050, PETRI_PLACES=129, PETRI_TRANSITIONS=97} [2024-11-19 09:43:42,635 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 83 predicate places. [2024-11-19 09:43:42,636 INFO L471 AbstractCegarLoop]: Abstraction has has 129 places, 97 transitions, 1050 flow [2024-11-19 09:43:42,636 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 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) [2024-11-19 09:43:42,636 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:43:42,636 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] [2024-11-19 09:43:42,636 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-11-19 09:43:42,636 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-19 09:43:42,637 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:43:42,637 INFO L85 PathProgramCache]: Analyzing trace with hash 496777028, now seen corresponding path program 2 times [2024-11-19 09:43:42,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:43:42,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606868748] [2024-11-19 09:43:42,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:43:42,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:43:42,658 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:43:42,658 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:43:42,879 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:43:42,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:43:42,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606868748] [2024-11-19 09:43:42,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606868748] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:43:42,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:43:42,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-19 09:43:42,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483764031] [2024-11-19 09:43:42,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:43:42,880 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-19 09:43:42,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:43:42,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-19 09:43:42,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-19 09:43:43,015 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-19 09:43:43,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 97 transitions, 1050 flow. Second operand has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 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) [2024-11-19 09:43:43,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:43:43,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-19 09:43:43,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:43:43,396 INFO L124 PetriNetUnfolderBase]: 1835/3448 cut-off events. [2024-11-19 09:43:43,396 INFO L125 PetriNetUnfolderBase]: For 13417/13417 co-relation queries the response was YES. [2024-11-19 09:43:43,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12615 conditions, 3448 events. 1835/3448 cut-off events. For 13417/13417 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 21098 event pairs, 661 based on Foata normal form. 20/3441 useless extension candidates. Maximal degree in co-relation 10139. Up to 2678 conditions per place. [2024-11-19 09:43:43,409 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 79 selfloop transitions, 54 changer transitions 9/153 dead transitions. [2024-11-19 09:43:43,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 153 transitions, 1939 flow [2024-11-19 09:43:43,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-19 09:43:43,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-19 09:43:43,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 249 transitions. [2024-11-19 09:43:43,410 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5763888888888888 [2024-11-19 09:43:43,410 INFO L175 Difference]: Start difference. First operand has 129 places, 97 transitions, 1050 flow. Second operand 9 states and 249 transitions. [2024-11-19 09:43:43,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 153 transitions, 1939 flow [2024-11-19 09:43:43,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 153 transitions, 1820 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-11-19 09:43:43,430 INFO L231 Difference]: Finished difference. Result has 135 places, 126 transitions, 1620 flow [2024-11-19 09:43:43,430 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=993, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1620, PETRI_PLACES=135, PETRI_TRANSITIONS=126} [2024-11-19 09:43:43,430 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 89 predicate places. [2024-11-19 09:43:43,430 INFO L471 AbstractCegarLoop]: Abstraction has has 135 places, 126 transitions, 1620 flow [2024-11-19 09:43:43,431 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 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) [2024-11-19 09:43:43,431 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:43:43,431 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] [2024-11-19 09:43:43,431 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-11-19 09:43:43,431 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-19 09:43:43,431 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:43:43,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1787559940, now seen corresponding path program 1 times [2024-11-19 09:43:43,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:43:43,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464367701] [2024-11-19 09:43:43,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:43:43,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:43:43,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:43:43,671 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:43:43,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:43:43,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464367701] [2024-11-19 09:43:43,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464367701] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:43:43,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:43:43,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-19 09:43:43,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002677716] [2024-11-19 09:43:43,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:43:43,672 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-19 09:43:43,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:43:43,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-19 09:43:43,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-19 09:43:43,813 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-19 09:43:43,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 126 transitions, 1620 flow. Second operand has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 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) [2024-11-19 09:43:43,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:43:43,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-19 09:43:43,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:43:44,290 INFO L124 PetriNetUnfolderBase]: 1951/3627 cut-off events. [2024-11-19 09:43:44,291 INFO L125 PetriNetUnfolderBase]: For 15056/15056 co-relation queries the response was YES. [2024-11-19 09:43:44,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14278 conditions, 3627 events. 1951/3627 cut-off events. For 15056/15056 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 21983 event pairs, 597 based on Foata normal form. 16/3630 useless extension candidates. Maximal degree in co-relation 12021. Up to 2726 conditions per place. [2024-11-19 09:43:44,304 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 88 selfloop transitions, 74 changer transitions 7/180 dead transitions. [2024-11-19 09:43:44,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 180 transitions, 2608 flow [2024-11-19 09:43:44,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-19 09:43:44,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-19 09:43:44,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 249 transitions. [2024-11-19 09:43:44,305 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5763888888888888 [2024-11-19 09:43:44,305 INFO L175 Difference]: Start difference. First operand has 135 places, 126 transitions, 1620 flow. Second operand 9 states and 249 transitions. [2024-11-19 09:43:44,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 180 transitions, 2608 flow [2024-11-19 09:43:44,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 180 transitions, 2587 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-11-19 09:43:44,338 INFO L231 Difference]: Finished difference. Result has 145 places, 152 transitions, 2334 flow [2024-11-19 09:43:44,338 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1609, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2334, PETRI_PLACES=145, PETRI_TRANSITIONS=152} [2024-11-19 09:43:44,339 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 99 predicate places. [2024-11-19 09:43:44,339 INFO L471 AbstractCegarLoop]: Abstraction has has 145 places, 152 transitions, 2334 flow [2024-11-19 09:43:44,339 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 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) [2024-11-19 09:43:44,339 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:43:44,339 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] [2024-11-19 09:43:44,339 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-11-19 09:43:44,340 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-19 09:43:44,340 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:43:44,340 INFO L85 PathProgramCache]: Analyzing trace with hash 99944470, now seen corresponding path program 2 times [2024-11-19 09:43:44,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:43:44,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518864481] [2024-11-19 09:43:44,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:43:44,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:43:44,357 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:43:44,357 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:43:44,660 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:43:44,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:43:44,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518864481] [2024-11-19 09:43:44,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518864481] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:43:44,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:43:44,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-19 09:43:44,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186425270] [2024-11-19 09:43:44,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:43:44,661 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-19 09:43:44,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:43:44,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-19 09:43:44,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-11-19 09:43:45,020 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-19 09:43:45,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 152 transitions, 2334 flow. Second operand has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 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) [2024-11-19 09:43:45,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:43:45,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-19 09:43:45,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:43:45,502 INFO L124 PetriNetUnfolderBase]: 1935/3624 cut-off events. [2024-11-19 09:43:45,502 INFO L125 PetriNetUnfolderBase]: For 17077/17077 co-relation queries the response was YES. [2024-11-19 09:43:45,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14923 conditions, 3624 events. 1935/3624 cut-off events. For 17077/17077 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 22143 event pairs, 630 based on Foata normal form. 16/3613 useless extension candidates. Maximal degree in co-relation 12537. Up to 2726 conditions per place. [2024-11-19 09:43:45,521 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 85 selfloop transitions, 79 changer transitions 15/190 dead transitions. [2024-11-19 09:43:45,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 190 transitions, 3007 flow [2024-11-19 09:43:45,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-19 09:43:45,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-19 09:43:45,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 249 transitions. [2024-11-19 09:43:45,523 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5763888888888888 [2024-11-19 09:43:45,523 INFO L175 Difference]: Start difference. First operand has 145 places, 152 transitions, 2334 flow. Second operand 9 states and 249 transitions. [2024-11-19 09:43:45,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 190 transitions, 3007 flow [2024-11-19 09:43:45,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 190 transitions, 2908 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-11-19 09:43:45,575 INFO L231 Difference]: Finished difference. Result has 152 places, 156 transitions, 2522 flow [2024-11-19 09:43:45,576 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2245, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2522, PETRI_PLACES=152, PETRI_TRANSITIONS=156} [2024-11-19 09:43:45,576 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 106 predicate places. [2024-11-19 09:43:45,576 INFO L471 AbstractCegarLoop]: Abstraction has has 152 places, 156 transitions, 2522 flow [2024-11-19 09:43:45,576 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 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) [2024-11-19 09:43:45,576 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:43:45,576 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] [2024-11-19 09:43:45,577 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-11-19 09:43:45,577 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-19 09:43:45,577 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:43:45,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1823456774, now seen corresponding path program 3 times [2024-11-19 09:43:45,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:43:45,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105930906] [2024-11-19 09:43:45,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 09:43:45,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:43:45,602 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-19 09:43:45,610 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:43:45,862 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:43:45,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:43:45,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105930906] [2024-11-19 09:43:45,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105930906] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:43:45,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529924219] [2024-11-19 09:43:45,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 09:43:45,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:43:45,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:43:45,865 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:43:45,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-19 09:43:45,938 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-19 09:43:45,938 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:43:45,940 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-19 09:43:45,941 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:43:46,081 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-19 09:43:46,089 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:43:46,089 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:43:46,198 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-11-19 09:43:46,199 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-11-19 09:43:46,236 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:43:46,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529924219] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:43:46,236 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:43:46,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 16 [2024-11-19 09:43:46,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036243127] [2024-11-19 09:43:46,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:43:46,237 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-19 09:43:46,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:43:46,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-19 09:43:46,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2024-11-19 09:43:46,647 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-19 09:43:46,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 156 transitions, 2522 flow. Second operand has 17 states, 17 states have (on average 22.705882352941178) internal successors, (386), 17 states have internal predecessors, (386), 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) [2024-11-19 09:43:46,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:43:46,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-19 09:43:46,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:43:47,256 INFO L124 PetriNetUnfolderBase]: 2027/3803 cut-off events. [2024-11-19 09:43:47,256 INFO L125 PetriNetUnfolderBase]: For 20480/20480 co-relation queries the response was YES. [2024-11-19 09:43:47,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15993 conditions, 3803 events. 2027/3803 cut-off events. For 20480/20480 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 23367 event pairs, 160 based on Foata normal form. 53/3843 useless extension candidates. Maximal degree in co-relation 14098. Up to 2029 conditions per place. [2024-11-19 09:43:47,278 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 116 selfloop transitions, 90 changer transitions 4/221 dead transitions. [2024-11-19 09:43:47,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 221 transitions, 3396 flow [2024-11-19 09:43:47,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-19 09:43:47,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-19 09:43:47,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 293 transitions. [2024-11-19 09:43:47,279 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6104166666666667 [2024-11-19 09:43:47,279 INFO L175 Difference]: Start difference. First operand has 152 places, 156 transitions, 2522 flow. Second operand 10 states and 293 transitions. [2024-11-19 09:43:47,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 221 transitions, 3396 flow [2024-11-19 09:43:47,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 221 transitions, 3212 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-11-19 09:43:47,338 INFO L231 Difference]: Finished difference. Result has 154 places, 162 transitions, 2644 flow [2024-11-19 09:43:47,338 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2358, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2644, PETRI_PLACES=154, PETRI_TRANSITIONS=162} [2024-11-19 09:43:47,338 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 108 predicate places. [2024-11-19 09:43:47,338 INFO L471 AbstractCegarLoop]: Abstraction has has 154 places, 162 transitions, 2644 flow [2024-11-19 09:43:47,339 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 22.705882352941178) internal successors, (386), 17 states have internal predecessors, (386), 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) [2024-11-19 09:43:47,339 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:43:47,339 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] [2024-11-19 09:43:47,352 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-19 09:43:47,540 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:43:47,540 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-19 09:43:47,540 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:43:47,540 INFO L85 PathProgramCache]: Analyzing trace with hash 518560062, now seen corresponding path program 3 times [2024-11-19 09:43:47,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:43:47,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000003864] [2024-11-19 09:43:47,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 09:43:47,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:43:47,554 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-19 09:43:47,554 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:43:47,782 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:43:47,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:43:47,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000003864] [2024-11-19 09:43:47,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000003864] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:43:47,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:43:47,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-19 09:43:47,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790201378] [2024-11-19 09:43:47,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:43:47,784 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-19 09:43:47,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:43:47,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-19 09:43:47,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-19 09:43:47,946 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-19 09:43:47,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 162 transitions, 2644 flow. Second operand has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 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) [2024-11-19 09:43:47,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:43:47,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-19 09:43:47,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:43:48,444 INFO L124 PetriNetUnfolderBase]: 2107/3932 cut-off events. [2024-11-19 09:43:48,445 INFO L125 PetriNetUnfolderBase]: For 23402/23402 co-relation queries the response was YES. [2024-11-19 09:43:48,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17069 conditions, 3932 events. 2107/3932 cut-off events. For 23402/23402 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 24249 event pairs, 748 based on Foata normal form. 20/3923 useless extension candidates. Maximal degree in co-relation 15524. Up to 2992 conditions per place. [2024-11-19 09:43:48,463 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 90 selfloop transitions, 87 changer transitions 12/200 dead transitions. [2024-11-19 09:43:48,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 200 transitions, 3345 flow [2024-11-19 09:43:48,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-19 09:43:48,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-19 09:43:48,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 250 transitions. [2024-11-19 09:43:48,465 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5787037037037037 [2024-11-19 09:43:48,465 INFO L175 Difference]: Start difference. First operand has 154 places, 162 transitions, 2644 flow. Second operand 9 states and 250 transitions. [2024-11-19 09:43:48,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 200 transitions, 3345 flow [2024-11-19 09:43:48,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 200 transitions, 3151 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-11-19 09:43:48,523 INFO L231 Difference]: Finished difference. Result has 158 places, 170 transitions, 2840 flow [2024-11-19 09:43:48,524 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2473, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2840, PETRI_PLACES=158, PETRI_TRANSITIONS=170} [2024-11-19 09:43:48,525 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 112 predicate places. [2024-11-19 09:43:48,525 INFO L471 AbstractCegarLoop]: Abstraction has has 158 places, 170 transitions, 2840 flow [2024-11-19 09:43:48,525 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 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) [2024-11-19 09:43:48,525 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:43:48,525 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] [2024-11-19 09:43:48,525 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-11-19 09:43:48,526 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-19 09:43:48,526 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:43:48,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1572317850, now seen corresponding path program 4 times [2024-11-19 09:43:48,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:43:48,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637006976] [2024-11-19 09:43:48,526 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 09:43:48,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:43:48,541 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 09:43:48,542 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:43:48,698 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:43:48,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:43:48,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637006976] [2024-11-19 09:43:48,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637006976] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:43:48,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:43:48,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-19 09:43:48,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896138899] [2024-11-19 09:43:48,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:43:48,700 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-19 09:43:48,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:43:48,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-19 09:43:48,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-19 09:43:48,792 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-19 09:43:48,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 170 transitions, 2840 flow. Second operand has 8 states, 8 states have (on average 22.875) internal successors, (183), 8 states have internal predecessors, (183), 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) [2024-11-19 09:43:48,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:43:48,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-19 09:43:48,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:43:49,250 INFO L124 PetriNetUnfolderBase]: 2047/3816 cut-off events. [2024-11-19 09:43:49,250 INFO L125 PetriNetUnfolderBase]: For 22662/22662 co-relation queries the response was YES. [2024-11-19 09:43:49,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17032 conditions, 3816 events. 2047/3816 cut-off events. For 22662/22662 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 23753 event pairs, 709 based on Foata normal form. 20/3815 useless extension candidates. Maximal degree in co-relation 16123. Up to 3036 conditions per place. [2024-11-19 09:43:49,272 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 103 selfloop transitions, 100 changer transitions 7/221 dead transitions. [2024-11-19 09:43:49,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 221 transitions, 3933 flow [2024-11-19 09:43:49,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-19 09:43:49,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-19 09:43:49,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 229 transitions. [2024-11-19 09:43:49,275 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5963541666666666 [2024-11-19 09:43:49,275 INFO L175 Difference]: Start difference. First operand has 158 places, 170 transitions, 2840 flow. Second operand 8 states and 229 transitions. [2024-11-19 09:43:49,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 221 transitions, 3933 flow [2024-11-19 09:43:49,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 221 transitions, 3734 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-11-19 09:43:49,357 INFO L231 Difference]: Finished difference. Result has 161 places, 189 transitions, 3412 flow [2024-11-19 09:43:49,358 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2683, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3412, PETRI_PLACES=161, PETRI_TRANSITIONS=189} [2024-11-19 09:43:49,358 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 115 predicate places. [2024-11-19 09:43:49,358 INFO L471 AbstractCegarLoop]: Abstraction has has 161 places, 189 transitions, 3412 flow [2024-11-19 09:43:49,358 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 22.875) internal successors, (183), 8 states have internal predecessors, (183), 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) [2024-11-19 09:43:49,358 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:43:49,358 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] [2024-11-19 09:43:49,359 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-11-19 09:43:49,359 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-19 09:43:49,359 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:43:49,359 INFO L85 PathProgramCache]: Analyzing trace with hash 200459714, now seen corresponding path program 5 times [2024-11-19 09:43:49,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:43:49,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759000334] [2024-11-19 09:43:49,359 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 09:43:49,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:43:49,384 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:43:49,384 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:43:50,116 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:43:50,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:43:50,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759000334] [2024-11-19 09:43:50,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759000334] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:43:50,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440129306] [2024-11-19 09:43:50,117 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 09:43:50,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:43:50,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:43:50,119 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:43:50,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-19 09:43:50,196 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:43:50,196 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:43:50,197 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-19 09:43:50,198 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:43:50,257 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-19 09:43:50,447 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-19 09:43:50,448 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2024-11-19 09:43:50,463 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:43:50,463 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:43:50,641 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 09:43:50,641 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 158 treesize of output 154 [2024-11-19 09:43:50,652 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-19 09:43:50,652 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 46 treesize of output 37 [2024-11-19 09:43:50,714 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2024-11-19 09:43:50,714 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 166 treesize of output 169 [2024-11-19 09:43:51,003 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:43:51,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440129306] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:43:51,004 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:43:51,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 9] total 28 [2024-11-19 09:43:51,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606846943] [2024-11-19 09:43:51,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:43:51,004 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-19 09:43:51,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:43:51,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-19 09:43:51,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=677, Unknown=0, NotChecked=0, Total=812 [2024-11-19 09:43:51,943 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 48 [2024-11-19 09:43:51,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 189 transitions, 3412 flow. Second operand has 29 states, 29 states have (on average 17.93103448275862) internal successors, (520), 29 states have internal predecessors, (520), 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) [2024-11-19 09:43:51,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:43:51,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 48 [2024-11-19 09:43:51,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:43:52,808 INFO L124 PetriNetUnfolderBase]: 2019/3774 cut-off events. [2024-11-19 09:43:52,808 INFO L125 PetriNetUnfolderBase]: For 24183/24183 co-relation queries the response was YES. [2024-11-19 09:43:52,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16917 conditions, 3774 events. 2019/3774 cut-off events. For 24183/24183 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 23283 event pairs, 710 based on Foata normal form. 20/3775 useless extension candidates. Maximal degree in co-relation 15980. Up to 3036 conditions per place. [2024-11-19 09:43:52,828 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 88 selfloop transitions, 109 changer transitions 7/215 dead transitions. [2024-11-19 09:43:52,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 215 transitions, 3985 flow [2024-11-19 09:43:52,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-19 09:43:52,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-19 09:43:52,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 254 transitions. [2024-11-19 09:43:52,830 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4810606060606061 [2024-11-19 09:43:52,830 INFO L175 Difference]: Start difference. First operand has 161 places, 189 transitions, 3412 flow. Second operand 11 states and 254 transitions. [2024-11-19 09:43:52,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 215 transitions, 3985 flow [2024-11-19 09:43:52,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 215 transitions, 3716 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-11-19 09:43:52,920 INFO L231 Difference]: Finished difference. Result has 167 places, 190 transitions, 3428 flow [2024-11-19 09:43:52,920 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=3157, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3428, PETRI_PLACES=167, PETRI_TRANSITIONS=190} [2024-11-19 09:43:52,920 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 121 predicate places. [2024-11-19 09:43:52,920 INFO L471 AbstractCegarLoop]: Abstraction has has 167 places, 190 transitions, 3428 flow [2024-11-19 09:43:52,921 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 17.93103448275862) internal successors, (520), 29 states have internal predecessors, (520), 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) [2024-11-19 09:43:52,921 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:43:52,921 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] [2024-11-19 09:43:52,934 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-19 09:43:53,121 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:43:53,122 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-19 09:43:53,123 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:43:53,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1303446156, now seen corresponding path program 4 times [2024-11-19 09:43:53,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:43:53,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301024794] [2024-11-19 09:43:53,123 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 09:43:53,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:43:53,139 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 09:43:53,139 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:43:53,291 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:43:53,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:43:53,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301024794] [2024-11-19 09:43:53,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301024794] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:43:53,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806492194] [2024-11-19 09:43:53,292 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 09:43:53,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:43:53,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:43:53,294 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:43:53,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-19 09:43:53,360 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 09:43:53,360 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:43:53,361 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-19 09:43:53,362 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:43:53,522 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 09:43:53,522 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2024-11-19 09:43:53,539 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:43:53,539 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:43:53,644 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-11-19 09:43:53,644 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-11-19 09:43:53,674 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:43:53,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806492194] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:43:53,674 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:43:53,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 7] total 19 [2024-11-19 09:43:53,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038621484] [2024-11-19 09:43:53,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:43:53,675 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-19 09:43:53,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:43:53,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-19 09:43:53,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2024-11-19 09:43:54,017 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-19 09:43:54,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 190 transitions, 3428 flow. Second operand has 20 states, 20 states have (on average 22.75) internal successors, (455), 20 states have internal predecessors, (455), 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) [2024-11-19 09:43:54,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:43:54,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-19 09:43:54,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:43:54,866 INFO L124 PetriNetUnfolderBase]: 2292/4336 cut-off events. [2024-11-19 09:43:54,867 INFO L125 PetriNetUnfolderBase]: For 26198/26198 co-relation queries the response was YES. [2024-11-19 09:43:54,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18983 conditions, 4336 events. 2292/4336 cut-off events. For 26198/26198 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 27905 event pairs, 414 based on Foata normal form. 53/4375 useless extension candidates. Maximal degree in co-relation 18045. Up to 2609 conditions per place. [2024-11-19 09:43:54,892 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 132 selfloop transitions, 138 changer transitions 0/281 dead transitions. [2024-11-19 09:43:54,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 281 transitions, 4608 flow [2024-11-19 09:43:54,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-19 09:43:54,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-19 09:43:54,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 420 transitions. [2024-11-19 09:43:54,894 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-11-19 09:43:54,894 INFO L175 Difference]: Start difference. First operand has 167 places, 190 transitions, 3428 flow. Second operand 15 states and 420 transitions. [2024-11-19 09:43:54,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 281 transitions, 4608 flow [2024-11-19 09:43:54,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 281 transitions, 4336 flow, removed 13 selfloop flow, removed 11 redundant places. [2024-11-19 09:43:54,982 INFO L231 Difference]: Finished difference. Result has 175 places, 216 transitions, 3910 flow [2024-11-19 09:43:54,982 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=3176, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3910, PETRI_PLACES=175, PETRI_TRANSITIONS=216} [2024-11-19 09:43:54,983 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 129 predicate places. [2024-11-19 09:43:54,983 INFO L471 AbstractCegarLoop]: Abstraction has has 175 places, 216 transitions, 3910 flow [2024-11-19 09:43:54,983 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 22.75) internal successors, (455), 20 states have internal predecessors, (455), 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) [2024-11-19 09:43:54,983 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:43:54,983 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] [2024-11-19 09:43:54,996 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-19 09:43:55,187 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:43:55,188 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-19 09:43:55,188 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:43:55,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1730498628, now seen corresponding path program 6 times [2024-11-19 09:43:55,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:43:55,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461217727] [2024-11-19 09:43:55,189 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-19 09:43:55,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:43:55,199 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-19 09:43:55,199 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:43:55,460 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:43:55,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:43:55,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461217727] [2024-11-19 09:43:55,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461217727] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:43:55,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:43:55,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-19 09:43:55,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843032899] [2024-11-19 09:43:55,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:43:55,462 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-19 09:43:55,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:43:55,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-19 09:43:55,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-19 09:43:55,631 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-19 09:43:55,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 216 transitions, 3910 flow. Second operand has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 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) [2024-11-19 09:43:55,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:43:55,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-19 09:43:55,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:43:56,216 INFO L124 PetriNetUnfolderBase]: 2272/4319 cut-off events. [2024-11-19 09:43:56,217 INFO L125 PetriNetUnfolderBase]: For 28973/28973 co-relation queries the response was YES. [2024-11-19 09:43:56,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19690 conditions, 4319 events. 2272/4319 cut-off events. For 28973/28973 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 27892 event pairs, 728 based on Foata normal form. 20/4320 useless extension candidates. Maximal degree in co-relation 18773. Up to 3618 conditions per place. [2024-11-19 09:43:56,236 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 115 selfloop transitions, 106 changer transitions 4/236 dead transitions. [2024-11-19 09:43:56,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 236 transitions, 4380 flow [2024-11-19 09:43:56,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-19 09:43:56,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-19 09:43:56,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 246 transitions. [2024-11-19 09:43:56,237 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5694444444444444 [2024-11-19 09:43:56,237 INFO L175 Difference]: Start difference. First operand has 175 places, 216 transitions, 3910 flow. Second operand 9 states and 246 transitions. [2024-11-19 09:43:56,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 236 transitions, 4380 flow [2024-11-19 09:43:56,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 236 transitions, 4245 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-11-19 09:43:56,334 INFO L231 Difference]: Finished difference. Result has 177 places, 211 transitions, 3881 flow [2024-11-19 09:43:56,334 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=3677, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3881, PETRI_PLACES=177, PETRI_TRANSITIONS=211} [2024-11-19 09:43:56,334 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 131 predicate places. [2024-11-19 09:43:56,335 INFO L471 AbstractCegarLoop]: Abstraction has has 177 places, 211 transitions, 3881 flow [2024-11-19 09:43:56,335 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 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) [2024-11-19 09:43:56,335 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:43:56,335 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] [2024-11-19 09:43:56,335 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-11-19 09:43:56,335 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-19 09:43:56,335 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:43:56,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1786201904, now seen corresponding path program 5 times [2024-11-19 09:43:56,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:43:56,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369335500] [2024-11-19 09:43:56,336 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 09:43:56,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:43:56,344 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:43:56,344 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:43:56,739 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:43:56,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:43:56,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369335500] [2024-11-19 09:43:56,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369335500] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:43:56,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561759435] [2024-11-19 09:43:56,740 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 09:43:56,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:43:56,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:43:56,743 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:43:56,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-19 09:43:56,812 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:43:56,813 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:43:56,814 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-19 09:43:56,814 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:43:56,950 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-11-19 09:43:56,951 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2024-11-19 09:43:56,954 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:43:56,954 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:43:57,080 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-11-19 09:43:57,080 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-11-19 09:43:57,111 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:43:57,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561759435] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:43:57,111 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:43:57,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2024-11-19 09:43:57,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214580922] [2024-11-19 09:43:57,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:43:57,112 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-19 09:43:57,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:43:57,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-19 09:43:57,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2024-11-19 09:43:57,673 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-19 09:43:57,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 211 transitions, 3881 flow. Second operand has 19 states, 19 states have (on average 23.0) internal successors, (437), 19 states have internal predecessors, (437), 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) [2024-11-19 09:43:57,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:43:57,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-19 09:43:57,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:43:58,722 INFO L124 PetriNetUnfolderBase]: 2268/4288 cut-off events. [2024-11-19 09:43:58,722 INFO L125 PetriNetUnfolderBase]: For 28815/28815 co-relation queries the response was YES. [2024-11-19 09:43:58,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20050 conditions, 4288 events. 2268/4288 cut-off events. For 28815/28815 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 27551 event pairs, 424 based on Foata normal form. 53/4328 useless extension candidates. Maximal degree in co-relation 19096. Up to 2713 conditions per place. [2024-11-19 09:43:58,741 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 135 selfloop transitions, 134 changer transitions 0/280 dead transitions. [2024-11-19 09:43:58,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 280 transitions, 4792 flow [2024-11-19 09:43:58,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-19 09:43:58,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-19 09:43:58,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 396 transitions. [2024-11-19 09:43:58,743 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2024-11-19 09:43:58,743 INFO L175 Difference]: Start difference. First operand has 177 places, 211 transitions, 3881 flow. Second operand 14 states and 396 transitions. [2024-11-19 09:43:58,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 280 transitions, 4792 flow [2024-11-19 09:43:58,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 280 transitions, 4587 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-19 09:43:58,845 INFO L231 Difference]: Finished difference. Result has 185 places, 216 transitions, 4016 flow [2024-11-19 09:43:58,846 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=3676, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4016, PETRI_PLACES=185, PETRI_TRANSITIONS=216} [2024-11-19 09:43:58,846 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 139 predicate places. [2024-11-19 09:43:58,846 INFO L471 AbstractCegarLoop]: Abstraction has has 185 places, 216 transitions, 4016 flow [2024-11-19 09:43:58,846 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 23.0) internal successors, (437), 19 states have internal predecessors, (437), 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) [2024-11-19 09:43:58,846 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:43:58,846 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] [2024-11-19 09:43:58,859 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-19 09:43:59,047 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-11-19 09:43:59,047 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-19 09:43:59,047 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:43:59,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1579898740, now seen corresponding path program 6 times [2024-11-19 09:43:59,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:43:59,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381052644] [2024-11-19 09:43:59,048 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-19 09:43:59,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:43:59,064 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-19 09:43:59,064 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:43:59,252 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:43:59,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:43:59,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381052644] [2024-11-19 09:43:59,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381052644] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:43:59,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:43:59,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-19 09:43:59,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105144265] [2024-11-19 09:43:59,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:43:59,254 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-19 09:43:59,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:43:59,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-19 09:43:59,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-19 09:43:59,383 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-19 09:43:59,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 216 transitions, 4016 flow. Second operand has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 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) [2024-11-19 09:43:59,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:43:59,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-19 09:43:59,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:43:59,960 INFO L124 PetriNetUnfolderBase]: 2165/4045 cut-off events. [2024-11-19 09:43:59,960 INFO L125 PetriNetUnfolderBase]: For 31954/31954 co-relation queries the response was YES. [2024-11-19 09:43:59,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19917 conditions, 4045 events. 2165/4045 cut-off events. For 31954/31954 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 25288 event pairs, 638 based on Foata normal form. 16/4044 useless extension candidates. Maximal degree in co-relation 18960. Up to 3385 conditions per place. [2024-11-19 09:43:59,985 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 119 selfloop transitions, 101 changer transitions 3/234 dead transitions. [2024-11-19 09:43:59,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 234 transitions, 4452 flow [2024-11-19 09:43:59,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-19 09:43:59,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-19 09:43:59,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 244 transitions. [2024-11-19 09:43:59,986 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5648148148148148 [2024-11-19 09:43:59,986 INFO L175 Difference]: Start difference. First operand has 185 places, 216 transitions, 4016 flow. Second operand 9 states and 244 transitions. [2024-11-19 09:43:59,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 234 transitions, 4452 flow [2024-11-19 09:44:00,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 234 transitions, 4240 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-11-19 09:44:00,088 INFO L231 Difference]: Finished difference. Result has 186 places, 210 transitions, 3867 flow [2024-11-19 09:44:00,088 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=3679, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3867, PETRI_PLACES=186, PETRI_TRANSITIONS=210} [2024-11-19 09:44:00,089 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 140 predicate places. [2024-11-19 09:44:00,089 INFO L471 AbstractCegarLoop]: Abstraction has has 186 places, 210 transitions, 3867 flow [2024-11-19 09:44:00,089 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 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) [2024-11-19 09:44:00,089 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:44:00,089 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] [2024-11-19 09:44:00,090 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-11-19 09:44:00,090 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-19 09:44:00,090 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:44:00,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1501871816, now seen corresponding path program 7 times [2024-11-19 09:44:00,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:44:00,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987227002] [2024-11-19 09:44:00,090 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-19 09:44:00,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:44:00,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:44:00,285 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:44:00,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:44:00,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987227002] [2024-11-19 09:44:00,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987227002] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:44:00,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275900115] [2024-11-19 09:44:00,285 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-19 09:44:00,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:44:00,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:44:00,290 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:44:00,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-19 09:44:00,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:44:00,367 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-19 09:44:00,369 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:44:00,463 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 09:44:00,464 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2024-11-19 09:44:00,483 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:44:00,483 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:44:00,589 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-11-19 09:44:00,590 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-11-19 09:44:00,617 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:44:00,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275900115] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-19 09:44:00,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-19 09:44:00,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9, 7] total 19 [2024-11-19 09:44:00,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144797751] [2024-11-19 09:44:00,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:44:00,618 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-19 09:44:00,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:44:00,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-19 09:44:00,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2024-11-19 09:44:00,737 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-19 09:44:00,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 210 transitions, 3867 flow. Second operand has 8 states, 8 states have (on average 22.875) internal successors, (183), 8 states have internal predecessors, (183), 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) [2024-11-19 09:44:00,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:44:00,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-19 09:44:00,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:44:01,510 INFO L124 PetriNetUnfolderBase]: 2220/4105 cut-off events. [2024-11-19 09:44:01,511 INFO L125 PetriNetUnfolderBase]: For 31242/31242 co-relation queries the response was YES. [2024-11-19 09:44:01,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20089 conditions, 4105 events. 2220/4105 cut-off events. For 31242/31242 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 25550 event pairs, 610 based on Foata normal form. 46/4130 useless extension candidates. Maximal degree in co-relation 19132. Up to 3423 conditions per place. [2024-11-19 09:44:01,540 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 133 selfloop transitions, 101 changer transitions 0/245 dead transitions. [2024-11-19 09:44:01,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 245 transitions, 4591 flow [2024-11-19 09:44:01,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-19 09:44:01,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-19 09:44:01,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 251 transitions. [2024-11-19 09:44:01,541 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5810185185185185 [2024-11-19 09:44:01,541 INFO L175 Difference]: Start difference. First operand has 186 places, 210 transitions, 3867 flow. Second operand 9 states and 251 transitions. [2024-11-19 09:44:01,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 245 transitions, 4591 flow [2024-11-19 09:44:01,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 245 transitions, 4389 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-11-19 09:44:01,668 INFO L231 Difference]: Finished difference. Result has 186 places, 214 transitions, 3960 flow [2024-11-19 09:44:01,668 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=3665, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3960, PETRI_PLACES=186, PETRI_TRANSITIONS=214} [2024-11-19 09:44:01,669 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 140 predicate places. [2024-11-19 09:44:01,669 INFO L471 AbstractCegarLoop]: Abstraction has has 186 places, 214 transitions, 3960 flow [2024-11-19 09:44:01,669 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 22.875) internal successors, (183), 8 states have internal predecessors, (183), 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) [2024-11-19 09:44:01,669 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:44:01,669 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] [2024-11-19 09:44:01,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-11-19 09:44:01,869 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-11-19 09:44:01,870 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-19 09:44:01,870 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:44:01,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1086893824, now seen corresponding path program 7 times [2024-11-19 09:44:01,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:44:01,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017474290] [2024-11-19 09:44:01,871 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-19 09:44:01,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:44:01,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:44:02,075 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:44:02,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:44:02,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017474290] [2024-11-19 09:44:02,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017474290] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:44:02,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837166261] [2024-11-19 09:44:02,076 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-19 09:44:02,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:44:02,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:44:02,078 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:44:02,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-19 09:44:02,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:44:02,147 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-19 09:44:02,148 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:44:02,232 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 09:44:02,233 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2024-11-19 09:44:02,253 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:44:02,253 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:44:02,367 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-11-19 09:44:02,367 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-11-19 09:44:02,397 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:44:02,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837166261] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:44:02,398 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:44:02,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 20 [2024-11-19 09:44:02,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135091740] [2024-11-19 09:44:02,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:44:02,398 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-19 09:44:02,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:44:02,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-19 09:44:02,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2024-11-19 09:44:02,693 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-19 09:44:02,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 214 transitions, 3960 flow. Second operand has 21 states, 21 states have (on average 22.80952380952381) internal successors, (479), 21 states have internal predecessors, (479), 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) [2024-11-19 09:44:02,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:44:02,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-19 09:44:02,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:44:03,346 INFO L124 PetriNetUnfolderBase]: 2421/4531 cut-off events. [2024-11-19 09:44:03,347 INFO L125 PetriNetUnfolderBase]: For 38383/38383 co-relation queries the response was YES. [2024-11-19 09:44:03,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22392 conditions, 4531 events. 2421/4531 cut-off events. For 38383/38383 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 29266 event pairs, 680 based on Foata normal form. 53/4565 useless extension candidates. Maximal degree in co-relation 21434. Up to 3555 conditions per place. [2024-11-19 09:44:03,373 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 142 selfloop transitions, 119 changer transitions 0/272 dead transitions. [2024-11-19 09:44:03,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 272 transitions, 5152 flow [2024-11-19 09:44:03,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-19 09:44:03,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-19 09:44:03,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 327 transitions. [2024-11-19 09:44:03,374 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5677083333333334 [2024-11-19 09:44:03,374 INFO L175 Difference]: Start difference. First operand has 186 places, 214 transitions, 3960 flow. Second operand 12 states and 327 transitions. [2024-11-19 09:44:03,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 272 transitions, 5152 flow [2024-11-19 09:44:03,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 272 transitions, 4990 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-11-19 09:44:03,500 INFO L231 Difference]: Finished difference. Result has 194 places, 236 transitions, 4617 flow [2024-11-19 09:44:03,500 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=3813, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4617, PETRI_PLACES=194, PETRI_TRANSITIONS=236} [2024-11-19 09:44:03,501 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 148 predicate places. [2024-11-19 09:44:03,501 INFO L471 AbstractCegarLoop]: Abstraction has has 194 places, 236 transitions, 4617 flow [2024-11-19 09:44:03,501 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 22.80952380952381) internal successors, (479), 21 states have internal predecessors, (479), 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) [2024-11-19 09:44:03,501 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:44:03,501 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] [2024-11-19 09:44:03,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-11-19 09:44:03,705 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-11-19 09:44:03,705 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-19 09:44:03,706 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:44:03,706 INFO L85 PathProgramCache]: Analyzing trace with hash 938491240, now seen corresponding path program 8 times [2024-11-19 09:44:03,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:44:03,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363348660] [2024-11-19 09:44:03,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:44:03,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:44:03,715 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:44:03,715 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:44:03,953 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:44:03,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:44:03,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363348660] [2024-11-19 09:44:03,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363348660] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:44:03,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568358295] [2024-11-19 09:44:03,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:44:03,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:44:03,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:44:03,956 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:44:03,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-19 09:44:04,022 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:44:04,023 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:44:04,023 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-19 09:44:04,024 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:44:04,060 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-19 09:44:04,160 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 09:44:04,160 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2024-11-19 09:44:04,182 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:44:04,183 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:44:04,328 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 09:44:04,328 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 158 treesize of output 154 [2024-11-19 09:44:04,365 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-19 09:44:04,365 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 46 treesize of output 37 [2024-11-19 09:44:04,404 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2024-11-19 09:44:04,404 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 175 treesize of output 178 [2024-11-19 09:44:04,663 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:44:04,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568358295] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:44:04,664 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:44:04,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 20 [2024-11-19 09:44:04,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412020735] [2024-11-19 09:44:04,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:44:04,664 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-19 09:44:04,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:44:04,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-19 09:44:04,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2024-11-19 09:44:05,148 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-19 09:44:05,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 236 transitions, 4617 flow. Second operand has 21 states, 21 states have (on average 22.333333333333332) internal successors, (469), 21 states have internal predecessors, (469), 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) [2024-11-19 09:44:05,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:44:05,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-19 09:44:05,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:44:06,200 INFO L124 PetriNetUnfolderBase]: 2714/5140 cut-off events. [2024-11-19 09:44:06,200 INFO L125 PetriNetUnfolderBase]: For 47577/47577 co-relation queries the response was YES. [2024-11-19 09:44:06,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25556 conditions, 5140 events. 2714/5140 cut-off events. For 47577/47577 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 34714 event pairs, 718 based on Foata normal form. 53/5172 useless extension candidates. Maximal degree in co-relation 24251. Up to 3873 conditions per place. [2024-11-19 09:44:06,230 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 159 selfloop transitions, 140 changer transitions 0/310 dead transitions. [2024-11-19 09:44:06,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 310 transitions, 5729 flow [2024-11-19 09:44:06,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-19 09:44:06,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-19 09:44:06,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 459 transitions. [2024-11-19 09:44:06,231 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-11-19 09:44:06,231 INFO L175 Difference]: Start difference. First operand has 194 places, 236 transitions, 4617 flow. Second operand 17 states and 459 transitions. [2024-11-19 09:44:06,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 310 transitions, 5729 flow [2024-11-19 09:44:06,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 310 transitions, 5504 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-11-19 09:44:06,384 INFO L231 Difference]: Finished difference. Result has 208 places, 255 transitions, 5069 flow [2024-11-19 09:44:06,384 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4396, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=5069, PETRI_PLACES=208, PETRI_TRANSITIONS=255} [2024-11-19 09:44:06,385 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 162 predicate places. [2024-11-19 09:44:06,385 INFO L471 AbstractCegarLoop]: Abstraction has has 208 places, 255 transitions, 5069 flow [2024-11-19 09:44:06,385 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 22.333333333333332) internal successors, (469), 21 states have internal predecessors, (469), 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) [2024-11-19 09:44:06,385 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:44:06,385 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] [2024-11-19 09:44:06,398 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-11-19 09:44:06,589 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:44:06,589 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-19 09:44:06,590 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:44:06,590 INFO L85 PathProgramCache]: Analyzing trace with hash -959884826, now seen corresponding path program 9 times [2024-11-19 09:44:06,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:44:06,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266477399] [2024-11-19 09:44:06,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 09:44:06,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:44:06,600 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-19 09:44:06,601 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:44:06,785 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:44:06,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:44:06,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266477399] [2024-11-19 09:44:06,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266477399] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:44:06,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:44:06,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-19 09:44:06,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095864430] [2024-11-19 09:44:06,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:44:06,786 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-19 09:44:06,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:44:06,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-19 09:44:06,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-19 09:44:06,918 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-19 09:44:06,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 255 transitions, 5069 flow. Second operand has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 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) [2024-11-19 09:44:06,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:44:06,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-19 09:44:06,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:44:07,738 INFO L124 PetriNetUnfolderBase]: 2611/4902 cut-off events. [2024-11-19 09:44:07,739 INFO L125 PetriNetUnfolderBase]: For 51716/51716 co-relation queries the response was YES. [2024-11-19 09:44:07,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25612 conditions, 4902 events. 2611/4902 cut-off events. For 51716/51716 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 32488 event pairs, 784 based on Foata normal form. 16/4898 useless extension candidates. Maximal degree in co-relation 24246. Up to 4219 conditions per place. [2024-11-19 09:44:07,787 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 143 selfloop transitions, 110 changer transitions 3/267 dead transitions. [2024-11-19 09:44:07,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 267 transitions, 5510 flow [2024-11-19 09:44:07,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-19 09:44:07,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-19 09:44:07,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 244 transitions. [2024-11-19 09:44:07,788 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5648148148148148 [2024-11-19 09:44:07,788 INFO L175 Difference]: Start difference. First operand has 208 places, 255 transitions, 5069 flow. Second operand 9 states and 244 transitions. [2024-11-19 09:44:07,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 267 transitions, 5510 flow [2024-11-19 09:44:08,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 267 transitions, 5309 flow, removed 33 selfloop flow, removed 8 redundant places. [2024-11-19 09:44:08,016 INFO L231 Difference]: Finished difference. Result has 208 places, 250 transitions, 4950 flow [2024-11-19 09:44:08,017 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4741, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4950, PETRI_PLACES=208, PETRI_TRANSITIONS=250} [2024-11-19 09:44:08,017 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 162 predicate places. [2024-11-19 09:44:08,017 INFO L471 AbstractCegarLoop]: Abstraction has has 208 places, 250 transitions, 4950 flow [2024-11-19 09:44:08,017 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 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) [2024-11-19 09:44:08,017 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:44:08,017 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] [2024-11-19 09:44:08,018 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-11-19 09:44:08,018 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-19 09:44:08,018 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:44:08,018 INFO L85 PathProgramCache]: Analyzing trace with hash 84792048, now seen corresponding path program 10 times [2024-11-19 09:44:08,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:44:08,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118699201] [2024-11-19 09:44:08,018 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 09:44:08,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:44:08,026 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 09:44:08,027 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:44:08,122 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:44:08,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:44:08,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118699201] [2024-11-19 09:44:08,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118699201] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:44:08,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:44:08,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-19 09:44:08,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382196072] [2024-11-19 09:44:08,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:44:08,123 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-19 09:44:08,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:44:08,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-19 09:44:08,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-19 09:44:08,200 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-19 09:44:08,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 250 transitions, 4950 flow. Second operand has 8 states, 8 states have (on average 22.875) internal successors, (183), 8 states have internal predecessors, (183), 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) [2024-11-19 09:44:08,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:44:08,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-19 09:44:08,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:44:08,903 INFO L124 PetriNetUnfolderBase]: 2500/4634 cut-off events. [2024-11-19 09:44:08,903 INFO L125 PetriNetUnfolderBase]: For 47168/47168 co-relation queries the response was YES. [2024-11-19 09:44:08,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24409 conditions, 4634 events. 2500/4634 cut-off events. For 47168/47168 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 29766 event pairs, 718 based on Foata normal form. 16/4633 useless extension candidates. Maximal degree in co-relation 23337. Up to 3996 conditions per place. [2024-11-19 09:44:08,933 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 148 selfloop transitions, 99 changer transitions 3/261 dead transitions. [2024-11-19 09:44:08,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 261 transitions, 5373 flow [2024-11-19 09:44:08,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-19 09:44:08,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-19 09:44:08,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 224 transitions. [2024-11-19 09:44:08,935 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-11-19 09:44:08,935 INFO L175 Difference]: Start difference. First operand has 208 places, 250 transitions, 4950 flow. Second operand 8 states and 224 transitions. [2024-11-19 09:44:08,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 261 transitions, 5373 flow [2024-11-19 09:44:09,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 261 transitions, 5172 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-19 09:44:09,111 INFO L231 Difference]: Finished difference. Result has 206 places, 244 transitions, 4803 flow [2024-11-19 09:44:09,111 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4616, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4803, PETRI_PLACES=206, PETRI_TRANSITIONS=244} [2024-11-19 09:44:09,112 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 160 predicate places. [2024-11-19 09:44:09,112 INFO L471 AbstractCegarLoop]: Abstraction has has 206 places, 244 transitions, 4803 flow [2024-11-19 09:44:09,112 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 22.875) internal successors, (183), 8 states have internal predecessors, (183), 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) [2024-11-19 09:44:09,112 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:44:09,112 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] [2024-11-19 09:44:09,112 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-11-19 09:44:09,113 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-19 09:44:09,113 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:44:09,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1436443682, now seen corresponding path program 11 times [2024-11-19 09:44:09,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:44:09,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479229078] [2024-11-19 09:44:09,113 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 09:44:09,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:44:09,122 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:44:09,122 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:44:09,396 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:44:09,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:44:09,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479229078] [2024-11-19 09:44:09,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479229078] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:44:09,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128324903] [2024-11-19 09:44:09,396 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 09:44:09,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:44:09,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:44:09,398 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:44:09,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-19 09:44:09,469 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:44:09,469 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:44:09,470 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-19 09:44:09,471 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:44:09,510 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-19 09:44:09,667 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-11-19 09:44:09,668 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2024-11-19 09:44:09,669 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:44:09,669 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:44:09,847 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 09:44:09,847 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 158 treesize of output 154 [2024-11-19 09:44:09,883 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-19 09:44:09,883 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 46 treesize of output 37 [2024-11-19 09:44:09,922 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2024-11-19 09:44:09,922 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 175 treesize of output 178 [2024-11-19 09:44:10,129 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:44:10,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128324903] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:44:10,130 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:44:10,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 23 [2024-11-19 09:44:10,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670281979] [2024-11-19 09:44:10,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:44:10,130 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-19 09:44:10,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:44:10,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-19 09:44:10,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2024-11-19 09:44:10,878 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-19 09:44:10,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 244 transitions, 4803 flow. Second operand has 24 states, 24 states have (on average 22.375) internal successors, (537), 24 states have internal predecessors, (537), 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) [2024-11-19 09:44:10,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:44:10,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-19 09:44:10,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:44:11,883 INFO L124 PetriNetUnfolderBase]: 2496/4608 cut-off events. [2024-11-19 09:44:11,884 INFO L125 PetriNetUnfolderBase]: For 50051/50051 co-relation queries the response was YES. [2024-11-19 09:44:11,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24756 conditions, 4608 events. 2496/4608 cut-off events. For 50051/50051 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 29379 event pairs, 675 based on Foata normal form. 53/4642 useless extension candidates. Maximal degree in co-relation 23459. Up to 3629 conditions per place. [2024-11-19 09:44:11,923 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 146 selfloop transitions, 128 changer transitions 0/285 dead transitions. [2024-11-19 09:44:11,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 285 transitions, 5581 flow [2024-11-19 09:44:11,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-19 09:44:11,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-19 09:44:11,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 354 transitions. [2024-11-19 09:44:11,924 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5673076923076923 [2024-11-19 09:44:11,924 INFO L175 Difference]: Start difference. First operand has 206 places, 244 transitions, 4803 flow. Second operand 13 states and 354 transitions. [2024-11-19 09:44:11,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 285 transitions, 5581 flow [2024-11-19 09:44:12,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 285 transitions, 5383 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-19 09:44:12,123 INFO L231 Difference]: Finished difference. Result has 211 places, 244 transitions, 4900 flow [2024-11-19 09:44:12,123 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4591, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4900, PETRI_PLACES=211, PETRI_TRANSITIONS=244} [2024-11-19 09:44:12,123 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 165 predicate places. [2024-11-19 09:44:12,124 INFO L471 AbstractCegarLoop]: Abstraction has has 211 places, 244 transitions, 4900 flow [2024-11-19 09:44:12,124 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 22.375) internal successors, (537), 24 states have internal predecessors, (537), 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) [2024-11-19 09:44:12,124 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:44:12,124 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] [2024-11-19 09:44:12,138 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-19 09:44:12,324 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:44:12,325 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-19 09:44:12,325 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:44:12,325 INFO L85 PathProgramCache]: Analyzing trace with hash 676096896, now seen corresponding path program 8 times [2024-11-19 09:44:12,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:44:12,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689519876] [2024-11-19 09:44:12,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:44:12,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:44:12,347 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:44:12,347 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:44:12,586 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:44:12,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:44:12,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689519876] [2024-11-19 09:44:12,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689519876] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:44:12,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395408422] [2024-11-19 09:44:12,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:44:12,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:44:12,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:44:12,589 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:44:12,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-19 09:44:12,662 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:44:12,663 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:44:12,663 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-19 09:44:12,664 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:44:12,770 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 09:44:12,770 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2024-11-19 09:44:12,785 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:44:12,785 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:44:12,885 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-11-19 09:44:12,885 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-11-19 09:44:12,912 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:44:12,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395408422] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:44:12,912 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:44:12,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 16 [2024-11-19 09:44:12,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741204560] [2024-11-19 09:44:12,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:44:12,913 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-19 09:44:12,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:44:12,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-19 09:44:12,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2024-11-19 09:44:13,196 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-19 09:44:13,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 244 transitions, 4900 flow. Second operand has 17 states, 17 states have (on average 22.470588235294116) internal successors, (382), 17 states have internal predecessors, (382), 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) [2024-11-19 09:44:13,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:44:13,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-19 09:44:13,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:44:14,155 INFO L124 PetriNetUnfolderBase]: 2862/5329 cut-off events. [2024-11-19 09:44:14,156 INFO L125 PetriNetUnfolderBase]: For 58433/58433 co-relation queries the response was YES. [2024-11-19 09:44:14,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28440 conditions, 5329 events. 2862/5329 cut-off events. For 58433/58433 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 35438 event pairs, 670 based on Foata normal form. 46/5355 useless extension candidates. Maximal degree in co-relation 27052. Up to 4055 conditions per place. [2024-11-19 09:44:14,190 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 175 selfloop transitions, 134 changer transitions 0/320 dead transitions. [2024-11-19 09:44:14,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 320 transitions, 6149 flow [2024-11-19 09:44:14,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-19 09:44:14,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-19 09:44:14,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 387 transitions. [2024-11-19 09:44:14,191 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5758928571428571 [2024-11-19 09:44:14,191 INFO L175 Difference]: Start difference. First operand has 211 places, 244 transitions, 4900 flow. Second operand 14 states and 387 transitions. [2024-11-19 09:44:14,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 320 transitions, 6149 flow [2024-11-19 09:44:14,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 320 transitions, 5903 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-11-19 09:44:14,408 INFO L231 Difference]: Finished difference. Result has 217 places, 271 transitions, 5399 flow [2024-11-19 09:44:14,408 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4662, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=5399, PETRI_PLACES=217, PETRI_TRANSITIONS=271} [2024-11-19 09:44:14,409 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 171 predicate places. [2024-11-19 09:44:14,409 INFO L471 AbstractCegarLoop]: Abstraction has has 217 places, 271 transitions, 5399 flow [2024-11-19 09:44:14,409 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 22.470588235294116) internal successors, (382), 17 states have internal predecessors, (382), 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) [2024-11-19 09:44:14,409 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:44:14,409 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] [2024-11-19 09:44:14,422 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-19 09:44:14,613 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2024-11-19 09:44:14,613 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-19 09:44:14,614 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:44:14,614 INFO L85 PathProgramCache]: Analyzing trace with hash 203085490, now seen corresponding path program 9 times [2024-11-19 09:44:14,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:44:14,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261901252] [2024-11-19 09:44:14,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 09:44:14,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:44:14,625 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-19 09:44:14,626 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:44:14,820 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:44:14,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:44:14,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261901252] [2024-11-19 09:44:14,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261901252] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:44:14,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:44:14,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-19 09:44:14,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063523833] [2024-11-19 09:44:14,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:44:14,821 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-19 09:44:14,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:44:14,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-19 09:44:14,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-19 09:44:14,951 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-19 09:44:14,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 271 transitions, 5399 flow. Second operand has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 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) [2024-11-19 09:44:14,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:44:14,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-19 09:44:14,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:44:15,895 INFO L124 PetriNetUnfolderBase]: 2842/5308 cut-off events. [2024-11-19 09:44:15,896 INFO L125 PetriNetUnfolderBase]: For 58144/58144 co-relation queries the response was YES. [2024-11-19 09:44:15,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28423 conditions, 5308 events. 2842/5308 cut-off events. For 58144/58144 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 35451 event pairs, 809 based on Foata normal form. 20/5309 useless extension candidates. Maximal degree in co-relation 27301. Up to 4647 conditions per place. [2024-11-19 09:44:15,945 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 167 selfloop transitions, 102 changer transitions 4/284 dead transitions. [2024-11-19 09:44:15,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 284 transitions, 5898 flow [2024-11-19 09:44:15,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-19 09:44:15,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-19 09:44:15,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 244 transitions. [2024-11-19 09:44:15,946 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5648148148148148 [2024-11-19 09:44:15,946 INFO L175 Difference]: Start difference. First operand has 217 places, 271 transitions, 5399 flow. Second operand 9 states and 244 transitions. [2024-11-19 09:44:15,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 284 transitions, 5898 flow [2024-11-19 09:44:16,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 284 transitions, 5546 flow, removed 34 selfloop flow, removed 9 redundant places. [2024-11-19 09:44:16,230 INFO L231 Difference]: Finished difference. Result has 216 places, 266 transitions, 5137 flow [2024-11-19 09:44:16,230 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4941, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5137, PETRI_PLACES=216, PETRI_TRANSITIONS=266} [2024-11-19 09:44:16,231 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 170 predicate places. [2024-11-19 09:44:16,231 INFO L471 AbstractCegarLoop]: Abstraction has has 216 places, 266 transitions, 5137 flow [2024-11-19 09:44:16,231 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 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) [2024-11-19 09:44:16,231 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:44:16,231 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] [2024-11-19 09:44:16,232 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-11-19 09:44:16,232 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-19 09:44:16,232 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:44:16,232 INFO L85 PathProgramCache]: Analyzing trace with hash -239960984, now seen corresponding path program 10 times [2024-11-19 09:44:16,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:44:16,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094124313] [2024-11-19 09:44:16,233 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 09:44:16,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:44:16,243 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 09:44:16,243 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:44:16,363 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:44:16,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:44:16,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094124313] [2024-11-19 09:44:16,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094124313] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:44:16,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101688412] [2024-11-19 09:44:16,364 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 09:44:16,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:44:16,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:44:16,367 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:44:16,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-19 09:44:16,450 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 09:44:16,451 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:44:16,452 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-19 09:44:16,453 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:44:16,644 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 09:44:16,645 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2024-11-19 09:44:16,662 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:44:16,663 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:44:16,771 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-11-19 09:44:16,771 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-11-19 09:44:16,806 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:44:16,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101688412] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:44:16,806 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:44:16,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 7] total 19 [2024-11-19 09:44:16,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846790922] [2024-11-19 09:44:16,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:44:16,807 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-19 09:44:16,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:44:16,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-19 09:44:16,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2024-11-19 09:44:17,272 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-19 09:44:17,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 266 transitions, 5137 flow. Second operand has 20 states, 20 states have (on average 22.75) internal successors, (455), 20 states have internal predecessors, (455), 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) [2024-11-19 09:44:17,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:44:17,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-19 09:44:17,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:44:18,233 INFO L124 PetriNetUnfolderBase]: 2843/5315 cut-off events. [2024-11-19 09:44:18,233 INFO L125 PetriNetUnfolderBase]: For 55677/55677 co-relation queries the response was YES. [2024-11-19 09:44:18,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27950 conditions, 5315 events. 2843/5315 cut-off events. For 55677/55677 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 35539 event pairs, 794 based on Foata normal form. 46/5340 useless extension candidates. Maximal degree in co-relation 26837. Up to 4607 conditions per place. [2024-11-19 09:44:18,262 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 177 selfloop transitions, 108 changer transitions 0/296 dead transitions. [2024-11-19 09:44:18,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 296 transitions, 5874 flow [2024-11-19 09:44:18,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-19 09:44:18,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-19 09:44:18,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 298 transitions. [2024-11-19 09:44:18,264 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5643939393939394 [2024-11-19 09:44:18,264 INFO L175 Difference]: Start difference. First operand has 216 places, 266 transitions, 5137 flow. Second operand 11 states and 298 transitions. [2024-11-19 09:44:18,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 296 transitions, 5874 flow [2024-11-19 09:44:18,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 296 transitions, 5670 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-11-19 09:44:18,468 INFO L231 Difference]: Finished difference. Result has 220 places, 267 transitions, 5184 flow [2024-11-19 09:44:18,468 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4926, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5184, PETRI_PLACES=220, PETRI_TRANSITIONS=267} [2024-11-19 09:44:18,468 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 174 predicate places. [2024-11-19 09:44:18,468 INFO L471 AbstractCegarLoop]: Abstraction has has 220 places, 267 transitions, 5184 flow [2024-11-19 09:44:18,468 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 22.75) internal successors, (455), 20 states have internal predecessors, (455), 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) [2024-11-19 09:44:18,469 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:44:18,469 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] [2024-11-19 09:44:18,484 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-19 09:44:18,672 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2024-11-19 09:44:18,673 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-19 09:44:18,673 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:44:18,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1491959532, now seen corresponding path program 11 times [2024-11-19 09:44:18,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:44:18,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716183894] [2024-11-19 09:44:18,674 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 09:44:18,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:44:18,685 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:44:18,685 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:44:19,033 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:44:19,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:44:19,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716183894] [2024-11-19 09:44:19,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716183894] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:44:19,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521814168] [2024-11-19 09:44:19,034 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 09:44:19,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:44:19,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:44:19,035 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:44:19,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-19 09:44:19,112 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:44:19,113 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:44:19,114 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-19 09:44:19,115 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:44:19,249 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 09:44:19,249 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2024-11-19 09:44:19,278 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:44:19,278 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-19 09:44:19,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521814168] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:44:19,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-19 09:44:19,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 18 [2024-11-19 09:44:19,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837331878] [2024-11-19 09:44:19,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:44:19,279 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-19 09:44:19,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:44:19,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-19 09:44:19,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342