./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version fca748b1 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-min-array-hom.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 0224e82797c7b26c7800eaf85be5e5678e7961d21aa4e2312eda2860d261b33a --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dd.update-z3-fca748b-m [2024-11-20 17:46:57,255 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-20 17:46:57,330 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-20 17:46:57,347 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-20 17:46:57,347 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-20 17:46:57,376 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-20 17:46:57,376 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-20 17:46:57,377 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-20 17:46:57,379 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-20 17:46:57,380 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-20 17:46:57,381 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-20 17:46:57,381 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-20 17:46:57,381 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-20 17:46:57,382 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-20 17:46:57,382 INFO L153 SettingsManager]: * Use SBE=true [2024-11-20 17:46:57,382 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-20 17:46:57,383 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-20 17:46:57,383 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-20 17:46:57,386 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-20 17:46:57,387 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-20 17:46:57,387 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-20 17:46:57,387 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-20 17:46:57,387 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-20 17:46:57,388 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-20 17:46:57,388 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-20 17:46:57,388 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-20 17:46:57,388 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-20 17:46:57,388 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-20 17:46:57,389 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-20 17:46:57,389 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-20 17:46:57,389 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-20 17:46:57,389 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-20 17:46:57,389 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-20 17:46:57,390 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 17:46:57,390 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-20 17:46:57,392 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-20 17:46:57,392 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-20 17:46:57,392 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-20 17:46:57,392 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-20 17:46:57,393 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-20 17:46:57,393 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-20 17:46:57,393 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-20 17:46:57,393 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0224e82797c7b26c7800eaf85be5e5678e7961d21aa4e2312eda2860d261b33a [2024-11-20 17:46:57,639 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-20 17:46:57,662 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-20 17:46:57,665 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-20 17:46:57,666 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-20 17:46:57,667 INFO L274 PluginConnector]: CDTParser initialized [2024-11-20 17:46:57,668 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c [2024-11-20 17:46:59,114 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-20 17:46:59,282 INFO L384 CDTParser]: Found 1 translation units. [2024-11-20 17:46:59,282 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c [2024-11-20 17:46:59,290 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dfe73bc91/2f1da0f58bf14f97a53ef379cd08624c/FLAG7ab530b54 [2024-11-20 17:46:59,678 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dfe73bc91/2f1da0f58bf14f97a53ef379cd08624c [2024-11-20 17:46:59,681 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-20 17:46:59,683 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-20 17:46:59,686 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-20 17:46:59,686 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-20 17:46:59,691 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-20 17:46:59,692 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:46:59" (1/1) ... [2024-11-20 17:46:59,693 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f798a78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:46:59, skipping insertion in model container [2024-11-20 17:46:59,693 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:46:59" (1/1) ... [2024-11-20 17:46:59,720 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-20 17:46:59,932 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-20 17:46:59,940 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 17:46:59,947 INFO L200 MainTranslator]: Completed pre-run [2024-11-20 17:46:59,967 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 17:46:59,984 INFO L204 MainTranslator]: Completed translation [2024-11-20 17:46:59,987 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:46:59 WrapperNode [2024-11-20 17:46:59,987 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-20 17:46:59,992 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-20 17:46:59,992 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-20 17:46:59,992 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-20 17:47:00,002 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:46:59" (1/1) ... [2024-11-20 17:47:00,010 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:46:59" (1/1) ... [2024-11-20 17:47:00,029 INFO L138 Inliner]: procedures = 23, calls = 29, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 89 [2024-11-20 17:47:00,029 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-20 17:47:00,030 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-20 17:47:00,030 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-20 17:47:00,030 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-20 17:47:00,039 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:46:59" (1/1) ... [2024-11-20 17:47:00,039 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:46:59" (1/1) ... [2024-11-20 17:47:00,041 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:46:59" (1/1) ... [2024-11-20 17:47:00,055 INFO L175 MemorySlicer]: Split 9 memory accesses to 2 slices as follows [2, 7]. 78 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-20 17:47:00,055 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:46:59" (1/1) ... [2024-11-20 17:47:00,055 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:46:59" (1/1) ... [2024-11-20 17:47:00,068 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:46:59" (1/1) ... [2024-11-20 17:47:00,072 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:46:59" (1/1) ... [2024-11-20 17:47:00,073 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:46:59" (1/1) ... [2024-11-20 17:47:00,075 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:46:59" (1/1) ... [2024-11-20 17:47:00,077 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-20 17:47:00,078 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-20 17:47:00,078 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-20 17:47:00,078 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-20 17:47:00,079 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:46:59" (1/1) ... [2024-11-20 17:47:00,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 17:47:00,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:47:00,121 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-20 17:47:00,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-20 17:47:00,177 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-20 17:47:00,178 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-20 17:47:00,179 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-20 17:47:00,179 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-20 17:47:00,179 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-20 17:47:00,179 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-20 17:47:00,179 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-20 17:47:00,179 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-20 17:47:00,180 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-20 17:47:00,180 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-20 17:47:00,180 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-20 17:47:00,182 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-20 17:47:00,182 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-20 17:47:00,182 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-20 17:47:00,182 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-20 17:47:00,182 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-20 17:47:00,183 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-20 17:47:00,183 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-20 17:47:00,184 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-20 17:47:00,311 INFO L238 CfgBuilder]: Building ICFG [2024-11-20 17:47:00,313 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-20 17:47:00,687 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-20 17:47:00,687 INFO L287 CfgBuilder]: Performing block encoding [2024-11-20 17:47:00,974 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-20 17:47:00,975 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-20 17:47:00,975 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:47:00 BoogieIcfgContainer [2024-11-20 17:47:00,975 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-20 17:47:00,978 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-20 17:47:00,978 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-20 17:47:00,981 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-20 17:47:00,981 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 05:46:59" (1/3) ... [2024-11-20 17:47:00,982 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a72c441 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:47:00, skipping insertion in model container [2024-11-20 17:47:00,982 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:46:59" (2/3) ... [2024-11-20 17:47:00,982 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a72c441 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:47:00, skipping insertion in model container [2024-11-20 17:47:00,983 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:47:00" (3/3) ... [2024-11-20 17:47:00,985 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-min-array-hom.wvr.c [2024-11-20 17:47:01,005 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-20 17:47:01,005 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2024-11-20 17:47:01,006 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-20 17:47:01,066 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-20 17:47:01,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 56 places, 50 transitions, 121 flow [2024-11-20 17:47:01,139 INFO L124 PetriNetUnfolderBase]: 4/47 cut-off events. [2024-11-20 17:47:01,139 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-20 17:47:01,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 47 events. 4/47 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 103 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 36. Up to 2 conditions per place. [2024-11-20 17:47:01,143 INFO L82 GeneralOperation]: Start removeDead. Operand has 56 places, 50 transitions, 121 flow [2024-11-20 17:47:01,145 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 52 places, 46 transitions, 110 flow [2024-11-20 17:47:01,154 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-20 17:47:01,159 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;@4c86457c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-20 17:47:01,159 INFO L334 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2024-11-20 17:47:01,162 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-20 17:47:01,162 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-20 17:47:01,162 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-20 17:47:01,163 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:47:01,163 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-20 17:47:01,164 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-20 17:47:01,170 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:47:01,170 INFO L85 PathProgramCache]: Analyzing trace with hash 494854, now seen corresponding path program 1 times [2024-11-20 17:47:01,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:47:01,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799845621] [2024-11-20 17:47:01,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:01,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:47:01,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:01,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:01,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:47:01,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799845621] [2024-11-20 17:47:01,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799845621] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:47:01,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:47:01,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-20 17:47:01,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511001017] [2024-11-20 17:47:01,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:47:01,429 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 17:47:01,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:47:01,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 17:47:01,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 17:47:01,482 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-20 17:47:01,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:47:01,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:47:01,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-20 17:47:01,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:47:01,874 INFO L124 PetriNetUnfolderBase]: 1316/1930 cut-off events. [2024-11-20 17:47:01,874 INFO L125 PetriNetUnfolderBase]: For 86/86 co-relation queries the response was YES. [2024-11-20 17:47:01,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3943 conditions, 1930 events. 1316/1930 cut-off events. For 86/86 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 9858 event pairs, 1060 based on Foata normal form. 1/1377 useless extension candidates. Maximal degree in co-relation 3637. Up to 1877 conditions per place. [2024-11-20 17:47:01,896 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 30 selfloop transitions, 2 changer transitions 0/37 dead transitions. [2024-11-20 17:47:01,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 37 transitions, 156 flow [2024-11-20 17:47:01,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 17:47:01,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 17:47:01,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 67 transitions. [2024-11-20 17:47:01,909 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44666666666666666 [2024-11-20 17:47:01,910 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 110 flow. Second operand 3 states and 67 transitions. [2024-11-20 17:47:01,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 37 transitions, 156 flow [2024-11-20 17:47:01,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 37 transitions, 144 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-20 17:47:01,920 INFO L231 Difference]: Finished difference. Result has 39 places, 37 transitions, 84 flow [2024-11-20 17:47:01,923 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=39, PETRI_TRANSITIONS=37} [2024-11-20 17:47:01,927 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, -13 predicate places. [2024-11-20 17:47:01,927 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 37 transitions, 84 flow [2024-11-20 17:47:01,928 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:47:01,928 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:47:01,928 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-20 17:47:01,928 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-20 17:47:01,928 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-20 17:47:01,929 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:47:01,929 INFO L85 PathProgramCache]: Analyzing trace with hash 494855, now seen corresponding path program 1 times [2024-11-20 17:47:01,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:47:01,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577650678] [2024-11-20 17:47:01,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:01,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:47:01,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:02,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:02,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:47:02,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577650678] [2024-11-20 17:47:02,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577650678] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:47:02,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:47:02,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 17:47:02,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748977524] [2024-11-20 17:47:02,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:47:02,262 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 17:47:02,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:47:02,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 17:47:02,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 17:47:02,269 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-20 17:47:02,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 37 transitions, 84 flow. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:47:02,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:47:02,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-20 17:47:02,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:47:02,549 INFO L124 PetriNetUnfolderBase]: 1317/1933 cut-off events. [2024-11-20 17:47:02,549 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-20 17:47:02,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3865 conditions, 1933 events. 1317/1933 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 9817 event pairs, 1060 based on Foata normal form. 0/1379 useless extension candidates. Maximal degree in co-relation 3843. Up to 1882 conditions per place. [2024-11-20 17:47:02,560 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 32 selfloop transitions, 4 changer transitions 0/40 dead transitions. [2024-11-20 17:47:02,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 40 transitions, 164 flow [2024-11-20 17:47:02,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 17:47:02,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 17:47:02,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 73 transitions. [2024-11-20 17:47:02,564 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.365 [2024-11-20 17:47:02,564 INFO L175 Difference]: Start difference. First operand has 39 places, 37 transitions, 84 flow. Second operand 4 states and 73 transitions. [2024-11-20 17:47:02,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 40 transitions, 164 flow [2024-11-20 17:47:02,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 40 transitions, 158 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 17:47:02,566 INFO L231 Difference]: Finished difference. Result has 42 places, 40 transitions, 107 flow [2024-11-20 17:47:02,566 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=107, PETRI_PLACES=42, PETRI_TRANSITIONS=40} [2024-11-20 17:47:02,567 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, -10 predicate places. [2024-11-20 17:47:02,567 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 40 transitions, 107 flow [2024-11-20 17:47:02,567 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:47:02,568 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:47:02,568 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-20 17:47:02,568 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-20 17:47:02,568 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-20 17:47:02,571 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:47:02,571 INFO L85 PathProgramCache]: Analyzing trace with hash 475570971, now seen corresponding path program 1 times [2024-11-20 17:47:02,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:47:02,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109203312] [2024-11-20 17:47:02,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:02,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:47:02,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:02,856 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:02,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:47:02,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109203312] [2024-11-20 17:47:02,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109203312] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:47:02,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849592653] [2024-11-20 17:47:02,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:02,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:47:02,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:47:02,860 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:47:02,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-20 17:47:02,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:02,927 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-20 17:47:02,932 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:47:03,013 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-20 17:47:03,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:03,229 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:47:03,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:03,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849592653] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:47:03,358 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:47:03,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-20 17:47:03,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151546200] [2024-11-20 17:47:03,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:47:03,359 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-20 17:47:03,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:47:03,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-20 17:47:03,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-11-20 17:47:03,394 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-20 17:47:03,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 40 transitions, 107 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 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) [2024-11-20 17:47:03,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:47:03,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-20 17:47:03,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:47:03,824 INFO L124 PetriNetUnfolderBase]: 1317/1932 cut-off events. [2024-11-20 17:47:03,824 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-20 17:47:03,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3872 conditions, 1932 events. 1317/1932 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 9863 event pairs, 1060 based on Foata normal form. 0/1378 useless extension candidates. Maximal degree in co-relation 3850. Up to 1878 conditions per place. [2024-11-20 17:47:03,837 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 28 selfloop transitions, 7 changer transitions 0/39 dead transitions. [2024-11-20 17:47:03,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 39 transitions, 173 flow [2024-11-20 17:47:03,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-20 17:47:03,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-20 17:47:03,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 90 transitions. [2024-11-20 17:47:03,839 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3 [2024-11-20 17:47:03,839 INFO L175 Difference]: Start difference. First operand has 42 places, 40 transitions, 107 flow. Second operand 6 states and 90 transitions. [2024-11-20 17:47:03,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 39 transitions, 173 flow [2024-11-20 17:47:03,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 39 transitions, 170 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-20 17:47:03,841 INFO L231 Difference]: Finished difference. Result has 45 places, 39 transitions, 114 flow [2024-11-20 17:47:03,841 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=114, PETRI_PLACES=45, PETRI_TRANSITIONS=39} [2024-11-20 17:47:03,842 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, -7 predicate places. [2024-11-20 17:47:03,842 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 39 transitions, 114 flow [2024-11-20 17:47:03,842 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 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) [2024-11-20 17:47:03,843 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:47:03,843 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-20 17:47:03,851 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-20 17:47:04,046 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:47:04,047 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-20 17:47:04,047 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:47:04,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1859881490, now seen corresponding path program 1 times [2024-11-20 17:47:04,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:47:04,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797843648] [2024-11-20 17:47:04,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:04,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:47:04,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:04,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:04,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:47:04,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797843648] [2024-11-20 17:47:04,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797843648] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:47:04,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:47:04,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 17:47:04,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561512998] [2024-11-20 17:47:04,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:47:04,108 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 17:47:04,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:47:04,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 17:47:04,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 17:47:04,116 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-11-20 17:47:04,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 39 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:47:04,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:47:04,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-11-20 17:47:04,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:47:04,328 INFO L124 PetriNetUnfolderBase]: 1316/1931 cut-off events. [2024-11-20 17:47:04,329 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-20 17:47:04,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3873 conditions, 1931 events. 1316/1931 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 9800 event pairs, 1060 based on Foata normal form. 1/1378 useless extension candidates. Maximal degree in co-relation 3851. Up to 1880 conditions per place. [2024-11-20 17:47:04,341 INFO L140 encePairwiseOnDemand]: 47/50 looper letters, 32 selfloop transitions, 2 changer transitions 0/38 dead transitions. [2024-11-20 17:47:04,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 38 transitions, 176 flow [2024-11-20 17:47:04,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 17:47:04,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 17:47:04,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 65 transitions. [2024-11-20 17:47:04,344 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-11-20 17:47:04,344 INFO L175 Difference]: Start difference. First operand has 45 places, 39 transitions, 114 flow. Second operand 3 states and 65 transitions. [2024-11-20 17:47:04,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 38 transitions, 176 flow [2024-11-20 17:47:04,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 38 transitions, 150 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-11-20 17:47:04,346 INFO L231 Difference]: Finished difference. Result has 40 places, 38 transitions, 86 flow [2024-11-20 17:47:04,346 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=40, PETRI_TRANSITIONS=38} [2024-11-20 17:47:04,347 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, -12 predicate places. [2024-11-20 17:47:04,347 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 38 transitions, 86 flow [2024-11-20 17:47:04,347 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:47:04,348 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:47:04,348 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:47:04,348 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-20 17:47:04,348 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-20 17:47:04,349 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:47:04,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1359754370, now seen corresponding path program 1 times [2024-11-20 17:47:04,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:47:04,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980581597] [2024-11-20 17:47:04,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:04,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:47:04,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:04,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:04,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:47:04,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980581597] [2024-11-20 17:47:04,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980581597] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:47:04,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700446574] [2024-11-20 17:47:04,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:04,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:47:04,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:47:04,545 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:47:04,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-20 17:47:04,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:04,603 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-20 17:47:04,605 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:47:04,612 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-20 17:47:04,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:04,669 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:47:04,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:04,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700446574] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-20 17:47:04,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-20 17:47:04,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2024-11-20 17:47:04,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913374740] [2024-11-20 17:47:04,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:47:04,748 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-20 17:47:04,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:47:04,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-20 17:47:04,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-11-20 17:47:04,766 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-11-20 17:47:04,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 38 transitions, 86 flow. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:47:04,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:47:04,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-11-20 17:47:04,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:47:05,079 INFO L124 PetriNetUnfolderBase]: 1814/2679 cut-off events. [2024-11-20 17:47:05,080 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-20 17:47:05,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5292 conditions, 2679 events. 1814/2679 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 14525 event pairs, 880 based on Foata normal form. 0/1942 useless extension candidates. Maximal degree in co-relation 5281. Up to 1584 conditions per place. [2024-11-20 17:47:05,093 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 47 selfloop transitions, 7 changer transitions 0/58 dead transitions. [2024-11-20 17:47:05,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 58 transitions, 236 flow [2024-11-20 17:47:05,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-20 17:47:05,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-20 17:47:05,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-11-20 17:47:05,095 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38333333333333336 [2024-11-20 17:47:05,095 INFO L175 Difference]: Start difference. First operand has 40 places, 38 transitions, 86 flow. Second operand 6 states and 115 transitions. [2024-11-20 17:47:05,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 58 transitions, 236 flow [2024-11-20 17:47:05,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 58 transitions, 232 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 17:47:05,098 INFO L231 Difference]: Finished difference. Result has 45 places, 40 transitions, 115 flow [2024-11-20 17:47:05,098 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=115, PETRI_PLACES=45, PETRI_TRANSITIONS=40} [2024-11-20 17:47:05,098 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, -7 predicate places. [2024-11-20 17:47:05,099 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 40 transitions, 115 flow [2024-11-20 17:47:05,099 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:47:05,099 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:47:05,099 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:47:05,109 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-20 17:47:05,304 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 [2024-11-20 17:47:05,305 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-20 17:47:05,305 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:47:05,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1359754371, now seen corresponding path program 1 times [2024-11-20 17:47:05,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:47:05,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690225885] [2024-11-20 17:47:05,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:05,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:47:05,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:05,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:05,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:47:05,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690225885] [2024-11-20 17:47:05,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690225885] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:47:05,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:47:05,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 17:47:05,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224888360] [2024-11-20 17:47:05,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:47:05,357 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 17:47:05,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:47:05,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 17:47:05,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 17:47:05,366 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-20 17:47:05,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 40 transitions, 115 flow. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:47:05,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:47:05,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-20 17:47:05,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:47:05,517 INFO L124 PetriNetUnfolderBase]: 1001/1468 cut-off events. [2024-11-20 17:47:05,517 INFO L125 PetriNetUnfolderBase]: For 904/904 co-relation queries the response was YES. [2024-11-20 17:47:05,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3605 conditions, 1468 events. 1001/1468 cut-off events. For 904/904 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 6568 event pairs, 733 based on Foata normal form. 123/1413 useless extension candidates. Maximal degree in co-relation 794. Up to 1405 conditions per place. [2024-11-20 17:47:05,526 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 31 selfloop transitions, 2 changer transitions 0/37 dead transitions. [2024-11-20 17:47:05,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 37 transitions, 175 flow [2024-11-20 17:47:05,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 17:47:05,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 17:47:05,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 68 transitions. [2024-11-20 17:47:05,528 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.34 [2024-11-20 17:47:05,528 INFO L175 Difference]: Start difference. First operand has 45 places, 40 transitions, 115 flow. Second operand 4 states and 68 transitions. [2024-11-20 17:47:05,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 37 transitions, 175 flow [2024-11-20 17:47:05,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 37 transitions, 170 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-20 17:47:05,531 INFO L231 Difference]: Finished difference. Result has 42 places, 37 transitions, 108 flow [2024-11-20 17:47:05,531 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=108, PETRI_PLACES=42, PETRI_TRANSITIONS=37} [2024-11-20 17:47:05,532 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, -10 predicate places. [2024-11-20 17:47:05,532 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 37 transitions, 108 flow [2024-11-20 17:47:05,533 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:47:05,533 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:47:05,533 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:47:05,533 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-20 17:47:05,533 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-20 17:47:05,534 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:47:05,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1083423898, now seen corresponding path program 1 times [2024-11-20 17:47:05,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:47:05,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336883471] [2024-11-20 17:47:05,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:05,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:47:05,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:05,631 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:05,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:47:05,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336883471] [2024-11-20 17:47:05,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336883471] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:47:05,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266607808] [2024-11-20 17:47:05,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:05,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:47:05,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:47:05,635 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:47:05,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-20 17:47:05,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:05,698 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-20 17:47:05,699 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:47:05,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:05,769 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:47:05,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:05,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266607808] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:47:05,825 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:47:05,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-20 17:47:05,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752965444] [2024-11-20 17:47:05,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:47:05,826 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-20 17:47:05,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:47:05,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-20 17:47:05,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-11-20 17:47:05,883 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-20 17:47:05,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 37 transitions, 108 flow. Second operand has 13 states, 13 states have (on average 10.923076923076923) internal successors, (142), 13 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:47:05,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:47:05,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-20 17:47:05,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:47:06,245 INFO L124 PetriNetUnfolderBase]: 1728/2523 cut-off events. [2024-11-20 17:47:06,245 INFO L125 PetriNetUnfolderBase]: For 1661/1661 co-relation queries the response was YES. [2024-11-20 17:47:06,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6300 conditions, 2523 events. 1728/2523 cut-off events. For 1661/1661 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 11932 event pairs, 1148 based on Foata normal form. 0/2237 useless extension candidates. Maximal degree in co-relation 4244. Up to 1681 conditions per place. [2024-11-20 17:47:06,261 INFO L140 encePairwiseOnDemand]: 43/50 looper letters, 69 selfloop transitions, 8 changer transitions 0/80 dead transitions. [2024-11-20 17:47:06,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 80 transitions, 404 flow [2024-11-20 17:47:06,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-20 17:47:06,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-20 17:47:06,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-11-20 17:47:06,264 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38571428571428573 [2024-11-20 17:47:06,264 INFO L175 Difference]: Start difference. First operand has 42 places, 37 transitions, 108 flow. Second operand 7 states and 135 transitions. [2024-11-20 17:47:06,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 80 transitions, 404 flow [2024-11-20 17:47:06,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 80 transitions, 400 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 17:47:06,267 INFO L231 Difference]: Finished difference. Result has 50 places, 42 transitions, 156 flow [2024-11-20 17:47:06,267 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=156, PETRI_PLACES=50, PETRI_TRANSITIONS=42} [2024-11-20 17:47:06,268 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, -2 predicate places. [2024-11-20 17:47:06,268 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 42 transitions, 156 flow [2024-11-20 17:47:06,269 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.923076923076923) internal successors, (142), 13 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:47:06,269 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:47:06,269 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:47:06,277 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-20 17:47:06,469 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:47:06,470 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-20 17:47:06,471 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:47:06,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1689668966, now seen corresponding path program 1 times [2024-11-20 17:47:06,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:47:06,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466491927] [2024-11-20 17:47:06,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:06,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:47:06,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:06,558 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:06,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:47:06,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466491927] [2024-11-20 17:47:06,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466491927] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:47:06,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499528241] [2024-11-20 17:47:06,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:06,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:47:06,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:47:06,561 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:47:06,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-20 17:47:06,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:06,624 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-20 17:47:06,625 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:47:06,709 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:06,710 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:47:06,766 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:06,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499528241] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:47:06,767 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:47:06,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-20 17:47:06,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752914133] [2024-11-20 17:47:06,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:47:06,768 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-20 17:47:06,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:47:06,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-20 17:47:06,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-11-20 17:47:06,820 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-20 17:47:06,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 42 transitions, 156 flow. Second operand has 14 states, 14 states have (on average 11.0) internal successors, (154), 14 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:47:06,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:47:06,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-20 17:47:06,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:47:07,241 INFO L124 PetriNetUnfolderBase]: 1788/2621 cut-off events. [2024-11-20 17:47:07,242 INFO L125 PetriNetUnfolderBase]: For 1585/1677 co-relation queries the response was YES. [2024-11-20 17:47:07,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6793 conditions, 2621 events. 1788/2621 cut-off events. For 1585/1677 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 12682 event pairs, 1114 based on Foata normal form. 38/2421 useless extension candidates. Maximal degree in co-relation 4626. Up to 1826 conditions per place. [2024-11-20 17:47:07,261 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 74 selfloop transitions, 10 changer transitions 0/87 dead transitions. [2024-11-20 17:47:07,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 87 transitions, 456 flow [2024-11-20 17:47:07,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-20 17:47:07,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-20 17:47:07,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-11-20 17:47:07,262 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3875 [2024-11-20 17:47:07,262 INFO L175 Difference]: Start difference. First operand has 50 places, 42 transitions, 156 flow. Second operand 8 states and 155 transitions. [2024-11-20 17:47:07,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 87 transitions, 456 flow [2024-11-20 17:47:07,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 87 transitions, 454 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-20 17:47:07,271 INFO L231 Difference]: Finished difference. Result has 59 places, 46 transitions, 215 flow [2024-11-20 17:47:07,271 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=215, PETRI_PLACES=59, PETRI_TRANSITIONS=46} [2024-11-20 17:47:07,272 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 7 predicate places. [2024-11-20 17:47:07,272 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 46 transitions, 215 flow [2024-11-20 17:47:07,272 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.0) internal successors, (154), 14 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:47:07,272 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:47:07,272 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:47:07,283 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-20 17:47:07,473 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:47:07,473 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-20 17:47:07,473 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:47:07,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1823740779, now seen corresponding path program 1 times [2024-11-20 17:47:07,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:47:07,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790331225] [2024-11-20 17:47:07,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:07,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:47:07,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:07,718 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:07,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:47:07,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790331225] [2024-11-20 17:47:07,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790331225] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:47:07,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189581752] [2024-11-20 17:47:07,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:07,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:47:07,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:47:07,723 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:47:07,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-20 17:47:07,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:07,798 INFO L255 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-20 17:47:07,800 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:47:07,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:07,932 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-20 17:47:07,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189581752] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:47:07,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-20 17:47:07,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 8 [2024-11-20 17:47:07,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471540839] [2024-11-20 17:47:07,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:47:07,933 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-20 17:47:07,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:47:07,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-20 17:47:07,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-20 17:47:07,964 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-11-20 17:47:07,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 46 transitions, 215 flow. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:47:07,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:47:07,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-11-20 17:47:07,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:47:08,285 INFO L124 PetriNetUnfolderBase]: 2001/3062 cut-off events. [2024-11-20 17:47:08,285 INFO L125 PetriNetUnfolderBase]: For 4359/4426 co-relation queries the response was YES. [2024-11-20 17:47:08,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8678 conditions, 3062 events. 2001/3062 cut-off events. For 4359/4426 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 15779 event pairs, 1077 based on Foata normal form. 0/2835 useless extension candidates. Maximal degree in co-relation 5665. Up to 2134 conditions per place. [2024-11-20 17:47:08,310 INFO L140 encePairwiseOnDemand]: 44/50 looper letters, 60 selfloop transitions, 6 changer transitions 0/70 dead transitions. [2024-11-20 17:47:08,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 70 transitions, 469 flow [2024-11-20 17:47:08,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 17:47:08,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 17:47:08,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 96 transitions. [2024-11-20 17:47:08,348 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.384 [2024-11-20 17:47:08,348 INFO L175 Difference]: Start difference. First operand has 59 places, 46 transitions, 215 flow. Second operand 5 states and 96 transitions. [2024-11-20 17:47:08,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 70 transitions, 469 flow [2024-11-20 17:47:08,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 70 transitions, 454 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-11-20 17:47:08,354 INFO L231 Difference]: Finished difference. Result has 60 places, 48 transitions, 227 flow [2024-11-20 17:47:08,355 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=227, PETRI_PLACES=60, PETRI_TRANSITIONS=48} [2024-11-20 17:47:08,355 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 8 predicate places. [2024-11-20 17:47:08,355 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 48 transitions, 227 flow [2024-11-20 17:47:08,356 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:47:08,356 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:47:08,356 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:47:08,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-20 17:47:08,560 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:47:08,561 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-20 17:47:08,561 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:47:08,561 INFO L85 PathProgramCache]: Analyzing trace with hash -848433454, now seen corresponding path program 2 times [2024-11-20 17:47:08,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:47:08,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504716846] [2024-11-20 17:47:08,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:08,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:47:08,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:08,752 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:08,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:47:08,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504716846] [2024-11-20 17:47:08,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504716846] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:47:08,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676532701] [2024-11-20 17:47:08,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 17:47:08,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:47:08,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:47:08,757 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:47:08,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-20 17:47:08,820 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-20 17:47:08,821 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:47:08,822 INFO L255 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-20 17:47:08,823 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:47:08,833 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-20 17:47:09,245 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-20 17:47:09,246 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-20 17:47:09,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676532701] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:47:09,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-20 17:47:09,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 9 [2024-11-20 17:47:09,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179455724] [2024-11-20 17:47:09,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:47:09,247 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-20 17:47:09,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:47:09,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-20 17:47:09,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-11-20 17:47:09,298 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-20 17:47:09,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 48 transitions, 227 flow. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:47:09,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:47:09,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-20 17:47:09,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:47:09,899 INFO L124 PetriNetUnfolderBase]: 3212/4591 cut-off events. [2024-11-20 17:47:09,900 INFO L125 PetriNetUnfolderBase]: For 7092/7202 co-relation queries the response was YES. [2024-11-20 17:47:09,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14214 conditions, 4591 events. 3212/4591 cut-off events. For 7092/7202 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 21749 event pairs, 1290 based on Foata normal form. 0/4267 useless extension candidates. Maximal degree in co-relation 10987. Up to 2994 conditions per place. [2024-11-20 17:47:09,931 INFO L140 encePairwiseOnDemand]: 43/50 looper letters, 80 selfloop transitions, 9 changer transitions 0/92 dead transitions. [2024-11-20 17:47:09,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 92 transitions, 619 flow [2024-11-20 17:47:09,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-20 17:47:09,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-20 17:47:09,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 117 transitions. [2024-11-20 17:47:09,933 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.39 [2024-11-20 17:47:09,934 INFO L175 Difference]: Start difference. First operand has 60 places, 48 transitions, 227 flow. Second operand 6 states and 117 transitions. [2024-11-20 17:47:09,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 92 transitions, 619 flow [2024-11-20 17:47:09,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 92 transitions, 604 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-20 17:47:09,941 INFO L231 Difference]: Finished difference. Result has 64 places, 51 transitions, 261 flow [2024-11-20 17:47:09,942 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=261, PETRI_PLACES=64, PETRI_TRANSITIONS=51} [2024-11-20 17:47:09,943 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 12 predicate places. [2024-11-20 17:47:09,945 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 51 transitions, 261 flow [2024-11-20 17:47:09,945 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:47:09,945 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:47:09,945 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:47:09,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-20 17:47:10,146 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:47:10,146 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-20 17:47:10,147 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:47:10,147 INFO L85 PathProgramCache]: Analyzing trace with hash 384438138, now seen corresponding path program 2 times [2024-11-20 17:47:10,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:47:10,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174242533] [2024-11-20 17:47:10,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:10,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:47:10,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:10,371 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:10,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:47:10,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174242533] [2024-11-20 17:47:10,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174242533] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:47:10,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625604171] [2024-11-20 17:47:10,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 17:47:10,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:47:10,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:47:10,375 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:47:10,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-20 17:47:10,436 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 17:47:10,436 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:47:10,437 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-20 17:47:10,440 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:47:10,543 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:10,543 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:47:10,652 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-20 17:47:10,708 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:10,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625604171] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:47:10,709 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:47:10,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2024-11-20 17:47:10,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504206462] [2024-11-20 17:47:10,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:47:10,710 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-20 17:47:10,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:47:10,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-20 17:47:10,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2024-11-20 17:47:10,816 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-11-20 17:47:10,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 51 transitions, 261 flow. Second operand has 18 states, 18 states have (on average 11.666666666666666) internal successors, (210), 18 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:47:10,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:47:10,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-11-20 17:47:10,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:47:11,769 INFO L124 PetriNetUnfolderBase]: 3687/5458 cut-off events. [2024-11-20 17:47:11,769 INFO L125 PetriNetUnfolderBase]: For 8045/8908 co-relation queries the response was YES. [2024-11-20 17:47:11,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17858 conditions, 5458 events. 3687/5458 cut-off events. For 8045/8908 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 28715 event pairs, 1334 based on Foata normal form. 388/5829 useless extension candidates. Maximal degree in co-relation 14440. Up to 2084 conditions per place. [2024-11-20 17:47:11,861 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 125 selfloop transitions, 14 changer transitions 0/144 dead transitions. [2024-11-20 17:47:11,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 144 transitions, 898 flow [2024-11-20 17:47:11,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-20 17:47:11,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-20 17:47:11,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 219 transitions. [2024-11-20 17:47:11,863 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.438 [2024-11-20 17:47:11,864 INFO L175 Difference]: Start difference. First operand has 64 places, 51 transitions, 261 flow. Second operand 10 states and 219 transitions. [2024-11-20 17:47:11,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 144 transitions, 898 flow [2024-11-20 17:47:11,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 144 transitions, 866 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-11-20 17:47:11,883 INFO L231 Difference]: Finished difference. Result has 73 places, 56 transitions, 328 flow [2024-11-20 17:47:11,884 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=328, PETRI_PLACES=73, PETRI_TRANSITIONS=56} [2024-11-20 17:47:11,885 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 21 predicate places. [2024-11-20 17:47:11,885 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 56 transitions, 328 flow [2024-11-20 17:47:11,885 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 11.666666666666666) internal successors, (210), 18 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:47:11,885 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:47:11,886 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:47:11,895 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-20 17:47:12,089 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:47:12,090 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-20 17:47:12,090 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:47:12,090 INFO L85 PathProgramCache]: Analyzing trace with hash 202087547, now seen corresponding path program 1 times [2024-11-20 17:47:12,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:47:12,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673336025] [2024-11-20 17:47:12,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:12,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:47:12,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:12,243 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:12,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:47:12,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673336025] [2024-11-20 17:47:12,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673336025] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:47:12,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203102307] [2024-11-20 17:47:12,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:12,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:47:12,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:47:12,247 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:47:12,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-20 17:47:12,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:12,318 INFO L255 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-20 17:47:12,319 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:47:12,467 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:12,467 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:47:12,558 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:12,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203102307] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:47:12,559 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:47:12,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2024-11-20 17:47:12,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671726764] [2024-11-20 17:47:12,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:47:12,560 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-20 17:47:12,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:47:12,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-20 17:47:12,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2024-11-20 17:47:12,617 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-20 17:47:12,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 56 transitions, 328 flow. Second operand has 18 states, 18 states have (on average 11.166666666666666) internal successors, (201), 18 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:47:12,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:47:12,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-20 17:47:12,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:47:13,861 INFO L124 PetriNetUnfolderBase]: 7046/10034 cut-off events. [2024-11-20 17:47:13,861 INFO L125 PetriNetUnfolderBase]: For 30208/30572 co-relation queries the response was YES. [2024-11-20 17:47:13,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36322 conditions, 10034 events. 7046/10034 cut-off events. For 30208/30572 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 52658 event pairs, 3666 based on Foata normal form. 0/9868 useless extension candidates. Maximal degree in co-relation 19726. Up to 5316 conditions per place. [2024-11-20 17:47:13,971 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 125 selfloop transitions, 14 changer transitions 0/142 dead transitions. [2024-11-20 17:47:13,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 142 transitions, 1135 flow [2024-11-20 17:47:13,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-20 17:47:13,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-20 17:47:13,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-11-20 17:47:13,973 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38666666666666666 [2024-11-20 17:47:13,973 INFO L175 Difference]: Start difference. First operand has 73 places, 56 transitions, 328 flow. Second operand 9 states and 174 transitions. [2024-11-20 17:47:13,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 142 transitions, 1135 flow [2024-11-20 17:47:14,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 142 transitions, 1036 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-11-20 17:47:14,011 INFO L231 Difference]: Finished difference. Result has 80 places, 63 transitions, 392 flow [2024-11-20 17:47:14,011 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=392, PETRI_PLACES=80, PETRI_TRANSITIONS=63} [2024-11-20 17:47:14,012 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 28 predicate places. [2024-11-20 17:47:14,012 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 63 transitions, 392 flow [2024-11-20 17:47:14,012 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 11.166666666666666) internal successors, (201), 18 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:47:14,012 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:47:14,013 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:47:14,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-20 17:47:14,216 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-20 17:47:14,217 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-20 17:47:14,218 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:47:14,218 INFO L85 PathProgramCache]: Analyzing trace with hash 275334849, now seen corresponding path program 1 times [2024-11-20 17:47:14,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:47:14,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860487842] [2024-11-20 17:47:14,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:14,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:47:14,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:14,302 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:14,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:47:14,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860487842] [2024-11-20 17:47:14,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860487842] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:47:14,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352267119] [2024-11-20 17:47:14,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:14,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:47:14,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:47:14,305 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:47:14,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-20 17:47:14,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:14,371 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-20 17:47:14,372 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:47:14,470 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:14,470 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:47:14,528 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:14,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352267119] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:47:14,529 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:47:14,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-20 17:47:14,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178621886] [2024-11-20 17:47:14,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:47:14,529 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-20 17:47:14,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:47:14,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-20 17:47:14,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2024-11-20 17:47:14,582 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-20 17:47:14,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 63 transitions, 392 flow. Second operand has 14 states, 14 states have (on average 11.357142857142858) internal successors, (159), 14 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:47:14,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:47:14,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-20 17:47:14,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:47:15,624 INFO L124 PetriNetUnfolderBase]: 6959/9784 cut-off events. [2024-11-20 17:47:15,624 INFO L125 PetriNetUnfolderBase]: For 28513/30064 co-relation queries the response was YES. [2024-11-20 17:47:15,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35536 conditions, 9784 events. 6959/9784 cut-off events. For 28513/30064 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 50208 event pairs, 4861 based on Foata normal form. 736/10468 useless extension candidates. Maximal degree in co-relation 25618. Up to 8803 conditions per place. [2024-11-20 17:47:15,678 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 83 selfloop transitions, 12 changer transitions 0/99 dead transitions. [2024-11-20 17:47:15,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 99 transitions, 766 flow [2024-11-20 17:47:15,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-20 17:47:15,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-20 17:47:15,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-11-20 17:47:15,680 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.37 [2024-11-20 17:47:15,680 INFO L175 Difference]: Start difference. First operand has 80 places, 63 transitions, 392 flow. Second operand 8 states and 148 transitions. [2024-11-20 17:47:15,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 99 transitions, 766 flow [2024-11-20 17:47:15,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 99 transitions, 757 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-11-20 17:47:15,707 INFO L231 Difference]: Finished difference. Result has 88 places, 67 transitions, 442 flow [2024-11-20 17:47:15,707 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=383, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=442, PETRI_PLACES=88, PETRI_TRANSITIONS=67} [2024-11-20 17:47:15,708 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 36 predicate places. [2024-11-20 17:47:15,708 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 67 transitions, 442 flow [2024-11-20 17:47:15,709 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.357142857142858) internal successors, (159), 14 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:47:15,709 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:47:15,709 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2024-11-20 17:47:15,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-20 17:47:15,910 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-20 17:47:15,911 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-20 17:47:15,911 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:47:15,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1880639510, now seen corresponding path program 3 times [2024-11-20 17:47:15,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:47:15,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925465681] [2024-11-20 17:47:15,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:15,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:47:15,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:16,034 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:16,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:47:16,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925465681] [2024-11-20 17:47:16,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925465681] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:47:16,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984780495] [2024-11-20 17:47:16,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-20 17:47:16,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:47:16,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:47:16,038 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) [2024-11-20 17:47:16,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-20 17:47:16,101 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-20 17:47:16,101 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:47:16,102 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-20 17:47:16,103 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:47:16,215 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-20 17:47:16,215 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:47:16,359 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2024-11-20 17:47:16,369 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-20 17:47:16,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984780495] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:47:16,369 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:47:16,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 19 [2024-11-20 17:47:16,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652995139] [2024-11-20 17:47:16,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:47:16,370 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-20 17:47:16,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:47:16,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-20 17:47:16,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2024-11-20 17:47:16,512 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-20 17:47:16,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 67 transitions, 442 flow. Second operand has 20 states, 20 states have (on average 11.05) internal successors, (221), 20 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:47:16,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:47:16,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-20 17:47:16,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:47:18,016 INFO L124 PetriNetUnfolderBase]: 6227/8755 cut-off events. [2024-11-20 17:47:18,016 INFO L125 PetriNetUnfolderBase]: For 17894/19278 co-relation queries the response was YES. [2024-11-20 17:47:18,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32068 conditions, 8755 events. 6227/8755 cut-off events. For 17894/19278 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 45230 event pairs, 1413 based on Foata normal form. 832/9565 useless extension candidates. Maximal degree in co-relation 23403. Up to 1970 conditions per place. [2024-11-20 17:47:18,075 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 224 selfloop transitions, 27 changer transitions 0/255 dead transitions. [2024-11-20 17:47:18,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 255 transitions, 1900 flow [2024-11-20 17:47:18,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-20 17:47:18,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-20 17:47:18,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 331 transitions. [2024-11-20 17:47:18,081 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41375 [2024-11-20 17:47:18,081 INFO L175 Difference]: Start difference. First operand has 88 places, 67 transitions, 442 flow. Second operand 16 states and 331 transitions. [2024-11-20 17:47:18,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 255 transitions, 1900 flow [2024-11-20 17:47:18,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 255 transitions, 1877 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-11-20 17:47:18,142 INFO L231 Difference]: Finished difference. Result has 103 places, 75 transitions, 576 flow [2024-11-20 17:47:18,142 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=419, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=576, PETRI_PLACES=103, PETRI_TRANSITIONS=75} [2024-11-20 17:47:18,143 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 51 predicate places. [2024-11-20 17:47:18,143 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 75 transitions, 576 flow [2024-11-20 17:47:18,144 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 11.05) internal successors, (221), 20 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:47:18,144 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:47:18,144 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:47:18,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-20 17:47:18,344 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-20 17:47:18,345 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-20 17:47:18,345 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:47:18,345 INFO L85 PathProgramCache]: Analyzing trace with hash 537255637, now seen corresponding path program 2 times [2024-11-20 17:47:18,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:47:18,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072794046] [2024-11-20 17:47:18,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:18,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:47:18,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:18,562 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:47:18,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:47:18,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072794046] [2024-11-20 17:47:18,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072794046] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:47:18,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940369809] [2024-11-20 17:47:18,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 17:47:18,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:47:18,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:47:18,566 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:47:18,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-20 17:47:18,637 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 17:47:18,637 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:47:18,638 INFO L255 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-20 17:47:18,640 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:47:18,820 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:47:18,820 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:47:19,104 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2024-11-20 17:47:19,169 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:47:19,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940369809] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:47:19,170 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:47:19,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2024-11-20 17:47:19,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881318085] [2024-11-20 17:47:19,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:47:19,170 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-20 17:47:19,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:47:19,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-20 17:47:19,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2024-11-20 17:47:19,360 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-20 17:47:19,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 75 transitions, 576 flow. Second operand has 20 states, 20 states have (on average 11.4) internal successors, (228), 20 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:47:19,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:47:19,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-20 17:47:19,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:47:20,174 INFO L124 PetriNetUnfolderBase]: 5428/7649 cut-off events. [2024-11-20 17:47:20,174 INFO L125 PetriNetUnfolderBase]: For 33470/34640 co-relation queries the response was YES. [2024-11-20 17:47:20,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32004 conditions, 7649 events. 5428/7649 cut-off events. For 33470/34640 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 38237 event pairs, 1141 based on Foata normal form. 688/8336 useless extension candidates. Maximal degree in co-relation 23736. Up to 2511 conditions per place. [2024-11-20 17:47:20,222 INFO L140 encePairwiseOnDemand]: 43/50 looper letters, 163 selfloop transitions, 14 changer transitions 0/183 dead transitions. [2024-11-20 17:47:20,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 183 transitions, 1873 flow [2024-11-20 17:47:20,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-20 17:47:20,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-20 17:47:20,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-11-20 17:47:20,224 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.37714285714285717 [2024-11-20 17:47:20,224 INFO L175 Difference]: Start difference. First operand has 103 places, 75 transitions, 576 flow. Second operand 7 states and 132 transitions. [2024-11-20 17:47:20,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 183 transitions, 1873 flow [2024-11-20 17:47:20,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 183 transitions, 1768 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-11-20 17:47:20,274 INFO L231 Difference]: Finished difference. Result has 103 places, 75 transitions, 571 flow [2024-11-20 17:47:20,274 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=531, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=571, PETRI_PLACES=103, PETRI_TRANSITIONS=75} [2024-11-20 17:47:20,276 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 51 predicate places. [2024-11-20 17:47:20,276 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 75 transitions, 571 flow [2024-11-20 17:47:20,276 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 11.4) internal successors, (228), 20 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:47:20,276 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:47:20,276 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:47:20,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-20 17:47:20,480 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-20 17:47:20,480 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-20 17:47:20,481 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:47:20,481 INFO L85 PathProgramCache]: Analyzing trace with hash 464008335, now seen corresponding path program 2 times [2024-11-20 17:47:20,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:47:20,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805573801] [2024-11-20 17:47:20,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:20,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:47:20,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:20,669 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:20,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:47:20,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805573801] [2024-11-20 17:47:20,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805573801] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:47:20,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750571599] [2024-11-20 17:47:20,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 17:47:20,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:47:20,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:47:20,672 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:47:20,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-20 17:47:20,743 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 17:47:20,743 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:47:20,744 INFO L255 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-20 17:47:20,746 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:47:20,757 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-20 17:47:21,403 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-20 17:47:21,403 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:47:21,701 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-20 17:47:21,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750571599] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:47:21,701 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:47:21,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 18 [2024-11-20 17:47:21,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382713756] [2024-11-20 17:47:21,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:47:21,702 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-20 17:47:21,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:47:21,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-20 17:47:21,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2024-11-20 17:47:21,878 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-20 17:47:21,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 75 transitions, 571 flow. Second operand has 20 states, 20 states have (on average 11.15) internal successors, (223), 20 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) [2024-11-20 17:47:21,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:47:21,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-20 17:47:21,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:47:23,448 INFO L124 PetriNetUnfolderBase]: 5340/7497 cut-off events. [2024-11-20 17:47:23,448 INFO L125 PetriNetUnfolderBase]: For 32780/32951 co-relation queries the response was YES. [2024-11-20 17:47:23,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32298 conditions, 7497 events. 5340/7497 cut-off events. For 32780/32951 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 36920 event pairs, 996 based on Foata normal form. 118/7361 useless extension candidates. Maximal degree in co-relation 23399. Up to 1459 conditions per place. [2024-11-20 17:47:23,511 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 175 selfloop transitions, 20 changer transitions 0/201 dead transitions. [2024-11-20 17:47:23,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 201 transitions, 1846 flow [2024-11-20 17:47:23,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-20 17:47:23,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-20 17:47:23,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 243 transitions. [2024-11-20 17:47:23,514 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.37384615384615383 [2024-11-20 17:47:23,514 INFO L175 Difference]: Start difference. First operand has 103 places, 75 transitions, 571 flow. Second operand 13 states and 243 transitions. [2024-11-20 17:47:23,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 201 transitions, 1846 flow [2024-11-20 17:47:23,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 201 transitions, 1676 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-11-20 17:47:23,586 INFO L231 Difference]: Finished difference. Result has 109 places, 76 transitions, 576 flow [2024-11-20 17:47:23,586 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=519, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=576, PETRI_PLACES=109, PETRI_TRANSITIONS=76} [2024-11-20 17:47:23,587 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 57 predicate places. [2024-11-20 17:47:23,587 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 76 transitions, 576 flow [2024-11-20 17:47:23,587 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 11.15) internal successors, (223), 20 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) [2024-11-20 17:47:23,587 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:47:23,587 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] [2024-11-20 17:47:23,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-20 17:47:23,788 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,SelfDestructingSolverStorable15 [2024-11-20 17:47:23,788 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-20 17:47:23,789 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:47:23,789 INFO L85 PathProgramCache]: Analyzing trace with hash 729268385, now seen corresponding path program 1 times [2024-11-20 17:47:23,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:47:23,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212653755] [2024-11-20 17:47:23,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:23,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:47:23,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:23,854 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:47:23,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:47:23,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212653755] [2024-11-20 17:47:23,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212653755] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:47:23,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:47:23,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 17:47:23,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756653727] [2024-11-20 17:47:23,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:47:23,856 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 17:47:23,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:47:23,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 17:47:23,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 17:47:23,857 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-11-20 17:47:23,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 76 transitions, 576 flow. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:47:23,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:47:23,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-11-20 17:47:23,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:47:24,631 INFO L124 PetriNetUnfolderBase]: 4674/6978 cut-off events. [2024-11-20 17:47:24,631 INFO L125 PetriNetUnfolderBase]: For 25521/26026 co-relation queries the response was YES. [2024-11-20 17:47:24,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28623 conditions, 6978 events. 4674/6978 cut-off events. For 25521/26026 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 36666 event pairs, 1034 based on Foata normal form. 3/6964 useless extension candidates. Maximal degree in co-relation 24081. Up to 5776 conditions per place. [2024-11-20 17:47:24,704 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 89 selfloop transitions, 6 changer transitions 1/105 dead transitions. [2024-11-20 17:47:24,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 105 transitions, 968 flow [2024-11-20 17:47:24,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 17:47:24,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 17:47:24,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 74 transitions. [2024-11-20 17:47:24,705 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49333333333333335 [2024-11-20 17:47:24,705 INFO L175 Difference]: Start difference. First operand has 109 places, 76 transitions, 576 flow. Second operand 3 states and 74 transitions. [2024-11-20 17:47:24,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 105 transitions, 968 flow [2024-11-20 17:47:24,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 105 transitions, 892 flow, removed 10 selfloop flow, removed 11 redundant places. [2024-11-20 17:47:24,783 INFO L231 Difference]: Finished difference. Result has 101 places, 81 transitions, 575 flow [2024-11-20 17:47:24,783 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=520, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=575, PETRI_PLACES=101, PETRI_TRANSITIONS=81} [2024-11-20 17:47:24,783 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 49 predicate places. [2024-11-20 17:47:24,783 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 81 transitions, 575 flow [2024-11-20 17:47:24,783 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:47:24,784 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:47:24,784 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:47:24,784 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-20 17:47:24,784 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-20 17:47:24,784 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:47:24,784 INFO L85 PathProgramCache]: Analyzing trace with hash 869669701, now seen corresponding path program 1 times [2024-11-20 17:47:24,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:47:24,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566954701] [2024-11-20 17:47:24,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:24,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:47:24,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:24,874 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:47:24,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:47:24,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566954701] [2024-11-20 17:47:24,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566954701] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:47:24,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490349202] [2024-11-20 17:47:24,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:24,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:47:24,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:47:24,877 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:47:24,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-20 17:47:24,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:24,975 INFO L255 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-20 17:47:24,977 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:47:25,037 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:47:25,038 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:47:25,097 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:47:25,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490349202] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-20 17:47:25,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-20 17:47:25,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2024-11-20 17:47:25,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360719515] [2024-11-20 17:47:25,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:47:25,098 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 17:47:25,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:47:25,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 17:47:25,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-11-20 17:47:25,105 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-20 17:47:25,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 81 transitions, 575 flow. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:47:25,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:47:25,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-20 17:47:25,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:47:25,788 INFO L124 PetriNetUnfolderBase]: 5579/8026 cut-off events. [2024-11-20 17:47:25,789 INFO L125 PetriNetUnfolderBase]: For 22142/22669 co-relation queries the response was YES. [2024-11-20 17:47:25,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31316 conditions, 8026 events. 5579/8026 cut-off events. For 22142/22669 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 41208 event pairs, 1577 based on Foata normal form. 246/8241 useless extension candidates. Maximal degree in co-relation 25705. Up to 4421 conditions per place. [2024-11-20 17:47:25,844 INFO L140 encePairwiseOnDemand]: 44/50 looper letters, 89 selfloop transitions, 13 changer transitions 0/108 dead transitions. [2024-11-20 17:47:25,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 108 transitions, 922 flow [2024-11-20 17:47:25,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 17:47:25,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 17:47:25,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 88 transitions. [2024-11-20 17:47:25,846 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.352 [2024-11-20 17:47:25,846 INFO L175 Difference]: Start difference. First operand has 101 places, 81 transitions, 575 flow. Second operand 5 states and 88 transitions. [2024-11-20 17:47:25,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 108 transitions, 922 flow [2024-11-20 17:47:25,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 108 transitions, 904 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-11-20 17:47:25,904 INFO L231 Difference]: Finished difference. Result has 102 places, 78 transitions, 555 flow [2024-11-20 17:47:25,904 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=529, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=555, PETRI_PLACES=102, PETRI_TRANSITIONS=78} [2024-11-20 17:47:25,905 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 50 predicate places. [2024-11-20 17:47:25,905 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 78 transitions, 555 flow [2024-11-20 17:47:25,905 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:47:25,905 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:47:25,905 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:47:25,914 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-20 17:47:26,109 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,SelfDestructingSolverStorable17 [2024-11-20 17:47:26,109 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-20 17:47:26,110 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:47:26,110 INFO L85 PathProgramCache]: Analyzing trace with hash -60437449, now seen corresponding path program 1 times [2024-11-20 17:47:26,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:47:26,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577801141] [2024-11-20 17:47:26,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:26,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:47:26,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:26,150 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:47:26,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:47:26,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577801141] [2024-11-20 17:47:26,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577801141] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:47:26,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:47:26,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 17:47:26,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517637103] [2024-11-20 17:47:26,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:47:26,152 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 17:47:26,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:47:26,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 17:47:26,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 17:47:26,160 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-20 17:47:26,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 78 transitions, 555 flow. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:47:26,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:47:26,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-20 17:47:26,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:47:26,666 INFO L124 PetriNetUnfolderBase]: 5114/7435 cut-off events. [2024-11-20 17:47:26,667 INFO L125 PetriNetUnfolderBase]: For 27945/28551 co-relation queries the response was YES. [2024-11-20 17:47:26,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30268 conditions, 7435 events. 5114/7435 cut-off events. For 27945/28551 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 38773 event pairs, 1522 based on Foata normal form. 264/7502 useless extension candidates. Maximal degree in co-relation 24788. Up to 3944 conditions per place. [2024-11-20 17:47:26,706 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 99 selfloop transitions, 9 changer transitions 0/115 dead transitions. [2024-11-20 17:47:26,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 115 transitions, 1074 flow [2024-11-20 17:47:26,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 17:47:26,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 17:47:26,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 76 transitions. [2024-11-20 17:47:26,707 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38 [2024-11-20 17:47:26,707 INFO L175 Difference]: Start difference. First operand has 102 places, 78 transitions, 555 flow. Second operand 4 states and 76 transitions. [2024-11-20 17:47:26,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 115 transitions, 1074 flow [2024-11-20 17:47:26,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 115 transitions, 1030 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-20 17:47:26,742 INFO L231 Difference]: Finished difference. Result has 101 places, 76 transitions, 535 flow [2024-11-20 17:47:26,742 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=517, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=535, PETRI_PLACES=101, PETRI_TRANSITIONS=76} [2024-11-20 17:47:26,743 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 49 predicate places. [2024-11-20 17:47:26,743 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 76 transitions, 535 flow [2024-11-20 17:47:26,743 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:47:26,743 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:47:26,743 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] [2024-11-20 17:47:26,744 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-20 17:47:26,744 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-20 17:47:26,744 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:47:26,744 INFO L85 PathProgramCache]: Analyzing trace with hash 935391215, now seen corresponding path program 1 times [2024-11-20 17:47:26,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:47:26,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801622730] [2024-11-20 17:47:26,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:26,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:47:26,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:27,230 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:27,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:47:27,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801622730] [2024-11-20 17:47:27,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801622730] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:47:27,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862103029] [2024-11-20 17:47:27,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:27,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:47:27,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:47:27,234 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) [2024-11-20 17:47:27,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-20 17:47:27,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:27,311 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-20 17:47:27,314 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:47:27,359 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 [2024-11-20 17:47:27,833 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 89 treesize of output 65 [2024-11-20 17:47:27,835 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 65 treesize of output 61 [2024-11-20 17:47:27,844 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 [2024-11-20 17:47:27,953 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:27,953 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:47:28,599 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 177 treesize of output 173 [2024-11-20 17:47:28,602 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 173 treesize of output 169 [2024-11-20 17:47:29,630 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 282 treesize of output 254 [2024-11-20 17:47:29,713 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 17:47:29,714 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 372 treesize of output 376 [2024-11-20 17:47:45,756 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 247 treesize of output 229 [2024-11-20 17:47:45,808 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 17:47:45,808 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 282 treesize of output 312 [2024-11-20 17:47:56,474 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:56,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862103029] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:47:56,474 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:47:56,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 23 [2024-11-20 17:47:56,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644157710] [2024-11-20 17:47:56,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:47:56,475 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-20 17:47:56,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:47:56,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-20 17:47:56,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2024-11-20 17:47:56,852 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-11-20 17:47:56,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 76 transitions, 535 flow. Second operand has 24 states, 24 states have (on average 13.0) internal successors, (312), 24 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:47:56,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:47:56,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-11-20 17:47:56,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:47:58,707 INFO L124 PetriNetUnfolderBase]: 4127/6284 cut-off events. [2024-11-20 17:47:58,708 INFO L125 PetriNetUnfolderBase]: For 21629/22073 co-relation queries the response was YES. [2024-11-20 17:47:58,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25577 conditions, 6284 events. 4127/6284 cut-off events. For 21629/22073 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 33887 event pairs, 1139 based on Foata normal form. 1/6270 useless extension candidates. Maximal degree in co-relation 21127. Up to 5158 conditions per place. [2024-11-20 17:47:58,740 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 91 selfloop transitions, 19 changer transitions 47/166 dead transitions. [2024-11-20 17:47:58,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 166 transitions, 1388 flow [2024-11-20 17:47:58,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-20 17:47:58,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-20 17:47:58,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 284 transitions. [2024-11-20 17:47:58,742 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.355 [2024-11-20 17:47:58,742 INFO L175 Difference]: Start difference. First operand has 101 places, 76 transitions, 535 flow. Second operand 16 states and 284 transitions. [2024-11-20 17:47:58,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 166 transitions, 1388 flow [2024-11-20 17:47:58,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 166 transitions, 1358 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-20 17:47:58,775 INFO L231 Difference]: Finished difference. Result has 121 places, 82 transitions, 621 flow [2024-11-20 17:47:58,775 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=517, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=621, PETRI_PLACES=121, PETRI_TRANSITIONS=82} [2024-11-20 17:47:58,775 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 69 predicate places. [2024-11-20 17:47:58,776 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 82 transitions, 621 flow [2024-11-20 17:47:58,776 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 13.0) internal successors, (312), 24 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:47:58,776 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:47:58,776 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] [2024-11-20 17:47:58,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-20 17:47:58,980 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:47:58,981 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-20 17:47:58,981 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:47:58,981 INFO L85 PathProgramCache]: Analyzing trace with hash 601619815, now seen corresponding path program 2 times [2024-11-20 17:47:58,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:47:58,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589726291] [2024-11-20 17:47:58,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:58,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:47:58,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:59,485 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:59,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:47:59,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589726291] [2024-11-20 17:47:59,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589726291] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:47:59,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562643243] [2024-11-20 17:47:59,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 17:47:59,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:47:59,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:47:59,488 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) [2024-11-20 17:47:59,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-20 17:47:59,566 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 17:47:59,567 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:47:59,568 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-20 17:47:59,570 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:47:59,605 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 [2024-11-20 17:47:59,970 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 79 treesize of output 55 [2024-11-20 17:47:59,973 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 55 treesize of output 51 [2024-11-20 17:47:59,978 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 51 treesize of output 47 [2024-11-20 17:48:00,043 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:48:00,044 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:48:00,431 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 177 treesize of output 173 [2024-11-20 17:48:00,434 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 173 treesize of output 169 [2024-11-20 17:48:02,186 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 109 treesize of output 99 [2024-11-20 17:48:02,194 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 17:48:02,195 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 128 treesize of output 122 [2024-11-20 17:48:02,452 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 204 treesize of output 188 [2024-11-20 17:48:02,497 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 17:48:02,497 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 236 treesize of output 240 [2024-11-20 17:48:03,845 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 217 treesize of output 195 [2024-11-20 17:48:03,857 INFO L349 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2024-11-20 17:48:03,857 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 296 treesize of output 1 [2024-11-20 17:48:03,926 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:48:03,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562643243] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:48:03,927 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:48:03,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 22 [2024-11-20 17:48:03,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299361643] [2024-11-20 17:48:03,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:48:03,927 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-20 17:48:03,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:48:03,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-20 17:48:03,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2024-11-20 17:48:04,240 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-11-20 17:48:04,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 82 transitions, 621 flow. Second operand has 23 states, 23 states have (on average 13.043478260869565) internal successors, (300), 23 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:48:04,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:48:04,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-11-20 17:48:04,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:48:06,446 INFO L124 PetriNetUnfolderBase]: 4172/6398 cut-off events. [2024-11-20 17:48:06,446 INFO L125 PetriNetUnfolderBase]: For 21970/22520 co-relation queries the response was YES. [2024-11-20 17:48:06,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26231 conditions, 6398 events. 4172/6398 cut-off events. For 21970/22520 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 34983 event pairs, 1163 based on Foata normal form. 13/6408 useless extension candidates. Maximal degree in co-relation 26187. Up to 5260 conditions per place. [2024-11-20 17:48:06,475 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 101 selfloop transitions, 27 changer transitions 35/172 dead transitions. [2024-11-20 17:48:06,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 172 transitions, 1628 flow [2024-11-20 17:48:06,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-20 17:48:06,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-20 17:48:06,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 318 transitions. [2024-11-20 17:48:06,477 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.33473684210526317 [2024-11-20 17:48:06,477 INFO L175 Difference]: Start difference. First operand has 121 places, 82 transitions, 621 flow. Second operand 19 states and 318 transitions. [2024-11-20 17:48:06,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 172 transitions, 1628 flow [2024-11-20 17:48:06,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 172 transitions, 1560 flow, removed 21 selfloop flow, removed 9 redundant places. [2024-11-20 17:48:06,508 INFO L231 Difference]: Finished difference. Result has 131 places, 92 transitions, 773 flow [2024-11-20 17:48:06,508 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=584, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=773, PETRI_PLACES=131, PETRI_TRANSITIONS=92} [2024-11-20 17:48:06,509 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 79 predicate places. [2024-11-20 17:48:06,509 INFO L471 AbstractCegarLoop]: Abstraction has has 131 places, 92 transitions, 773 flow [2024-11-20 17:48:06,509 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 13.043478260869565) internal successors, (300), 23 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:48:06,509 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:48:06,509 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] [2024-11-20 17:48:06,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-20 17:48:06,709 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:48:06,710 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-20 17:48:06,710 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:48:06,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1312950695, now seen corresponding path program 3 times [2024-11-20 17:48:06,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:48:06,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170219847] [2024-11-20 17:48:06,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:48:06,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:48:06,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:48:07,206 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:48:07,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:48:07,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170219847] [2024-11-20 17:48:07,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170219847] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:48:07,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817457310] [2024-11-20 17:48:07,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-20 17:48:07,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:48:07,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:48:07,209 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) [2024-11-20 17:48:07,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-20 17:48:07,287 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-20 17:48:07,287 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:48:07,289 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-20 17:48:07,290 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:48:07,348 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 [2024-11-20 17:48:07,697 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 79 treesize of output 55 [2024-11-20 17:48:07,700 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 55 treesize of output 51 [2024-11-20 17:48:07,702 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 51 treesize of output 47 [2024-11-20 17:48:07,781 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:48:07,781 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:48:08,037 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 177 treesize of output 173 [2024-11-20 17:48:08,039 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 173 treesize of output 169 [2024-11-20 17:48:09,584 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 109 treesize of output 99 [2024-11-20 17:48:09,593 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 17:48:09,593 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 128 treesize of output 122 [2024-11-20 17:48:09,826 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 217 treesize of output 195 [2024-11-20 17:48:09,835 INFO L349 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2024-11-20 17:48:09,836 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 296 treesize of output 1 [2024-11-20 17:48:09,841 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 204 treesize of output 188 [2024-11-20 17:48:09,890 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 17:48:09,891 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 236 treesize of output 240 [2024-11-20 17:48:11,130 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:48:11,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817457310] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:48:11,130 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:48:11,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 23 [2024-11-20 17:48:11,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584418570] [2024-11-20 17:48:11,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:48:11,131 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-20 17:48:11,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:48:11,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-20 17:48:11,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2024-11-20 17:48:11,425 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-11-20 17:48:11,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 92 transitions, 773 flow. Second operand has 24 states, 24 states have (on average 13.0) internal successors, (312), 24 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:48:11,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:48:11,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-11-20 17:48:11,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:48:13,825 INFO L124 PetriNetUnfolderBase]: 4142/6308 cut-off events. [2024-11-20 17:48:13,825 INFO L125 PetriNetUnfolderBase]: For 23341/23785 co-relation queries the response was YES. [2024-11-20 17:48:13,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26192 conditions, 6308 events. 4142/6308 cut-off events. For 23341/23785 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 34116 event pairs, 1161 based on Foata normal form. 1/6294 useless extension candidates. Maximal degree in co-relation 26141. Up to 5136 conditions per place. [2024-11-20 17:48:13,866 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 116 selfloop transitions, 24 changer transitions 38/187 dead transitions. [2024-11-20 17:48:13,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 187 transitions, 1801 flow [2024-11-20 17:48:13,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-20 17:48:13,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-20 17:48:13,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 338 transitions. [2024-11-20 17:48:13,868 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.338 [2024-11-20 17:48:13,868 INFO L175 Difference]: Start difference. First operand has 131 places, 92 transitions, 773 flow. Second operand 20 states and 338 transitions. [2024-11-20 17:48:13,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 187 transitions, 1801 flow [2024-11-20 17:48:13,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 187 transitions, 1707 flow, removed 26 selfloop flow, removed 11 redundant places. [2024-11-20 17:48:13,910 INFO L231 Difference]: Finished difference. Result has 137 places, 93 transitions, 802 flow [2024-11-20 17:48:13,911 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=707, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=802, PETRI_PLACES=137, PETRI_TRANSITIONS=93} [2024-11-20 17:48:13,911 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 85 predicate places. [2024-11-20 17:48:13,911 INFO L471 AbstractCegarLoop]: Abstraction has has 137 places, 93 transitions, 802 flow [2024-11-20 17:48:13,911 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 13.0) internal successors, (312), 24 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:48:13,911 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:48:13,911 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] [2024-11-20 17:48:13,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-20 17:48:14,112 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,SelfDestructingSolverStorable21 [2024-11-20 17:48:14,112 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-20 17:48:14,112 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:48:14,112 INFO L85 PathProgramCache]: Analyzing trace with hash 536571623, now seen corresponding path program 4 times [2024-11-20 17:48:14,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:48:14,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931732884] [2024-11-20 17:48:14,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:48:14,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:48:14,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:48:14,554 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:48:14,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:48:14,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931732884] [2024-11-20 17:48:14,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931732884] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:48:14,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758468586] [2024-11-20 17:48:14,555 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-20 17:48:14,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:48:14,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:48:14,559 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) [2024-11-20 17:48:14,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-20 17:48:14,637 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-20 17:48:14,637 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:48:14,639 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-20 17:48:14,641 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:48:14,681 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 [2024-11-20 17:48:14,893 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 79 treesize of output 55 [2024-11-20 17:48:14,896 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 55 treesize of output 51 [2024-11-20 17:48:14,897 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 51 treesize of output 47 [2024-11-20 17:48:14,964 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:48:14,964 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:48:15,116 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 169 treesize of output 165 [2024-11-20 17:48:15,120 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 165 treesize of output 161 [2024-11-20 17:48:16,644 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 204 treesize of output 188 [2024-11-20 17:48:16,670 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 17:48:16,671 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 236 treesize of output 240