./Ultimate.py --spec ../sv-benchmarks/c/properties/no-overflow.prp --file ../sv-benchmarks/c/weaver/popl20-prod-cons.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 3061b6dc Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-prod-cons.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-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 ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7225a3dc80a635bdf8bc0a0aebf3fff6c385d87e3635c30eb2fdc2ad9b10efb0 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-19 14:08:27,351 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-19 14:08:27,415 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2024-11-19 14:08:27,421 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-19 14:08:27,421 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-19 14:08:27,453 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-19 14:08:27,454 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-19 14:08:27,455 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-19 14:08:27,456 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-19 14:08:27,457 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-19 14:08:27,457 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-19 14:08:27,457 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-19 14:08:27,458 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-19 14:08:27,458 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-19 14:08:27,460 INFO L153 SettingsManager]: * Use SBE=true [2024-11-19 14:08:27,460 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-19 14:08:27,460 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-19 14:08:27,461 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-19 14:08:27,461 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-19 14:08:27,465 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-19 14:08:27,465 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-19 14:08:27,466 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-19 14:08:27,466 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-19 14:08:27,466 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-19 14:08:27,466 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-19 14:08:27,467 INFO L153 SettingsManager]: * Check absence of signed integer overflows=ASSERTandASSUME [2024-11-19 14:08:27,467 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-19 14:08:27,467 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-19 14:08:27,467 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-19 14:08:27,468 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-19 14:08:27,468 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-19 14:08:27,468 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-19 14:08:27,468 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-19 14:08:27,468 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-19 14:08:27,469 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 14:08:27,469 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-19 14:08:27,469 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-19 14:08:27,470 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-19 14:08:27,470 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-19 14:08:27,471 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-19 14:08:27,471 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-19 14:08:27,472 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-19 14:08:27,472 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-19 14:08:27,472 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-19 14:08:27,474 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7225a3dc80a635bdf8bc0a0aebf3fff6c385d87e3635c30eb2fdc2ad9b10efb0 [2024-11-19 14:08:27,752 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-19 14:08:27,778 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-19 14:08:27,782 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-19 14:08:27,783 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-19 14:08:27,784 INFO L274 PluginConnector]: CDTParser initialized [2024-11-19 14:08:27,785 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-prod-cons.wvr.c [2024-11-19 14:08:29,228 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-19 14:08:29,413 INFO L384 CDTParser]: Found 1 translation units. [2024-11-19 14:08:29,413 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-prod-cons.wvr.c [2024-11-19 14:08:29,421 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c85f95a5/a71ef53c1b4e430dbc64f13c93c75ddd/FLAG235efc071 [2024-11-19 14:08:29,812 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c85f95a5/a71ef53c1b4e430dbc64f13c93c75ddd [2024-11-19 14:08:29,814 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-19 14:08:29,816 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-19 14:08:29,817 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-19 14:08:29,817 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-19 14:08:29,824 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-19 14:08:29,824 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:08:29" (1/1) ... [2024-11-19 14:08:29,825 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e20970f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:08:29, skipping insertion in model container [2024-11-19 14:08:29,825 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:08:29" (1/1) ... [2024-11-19 14:08:29,848 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-19 14:08:30,063 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 14:08:30,074 INFO L200 MainTranslator]: Completed pre-run [2024-11-19 14:08:30,110 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 14:08:30,133 INFO L204 MainTranslator]: Completed translation [2024-11-19 14:08:30,134 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:08:30 WrapperNode [2024-11-19 14:08:30,136 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-19 14:08:30,138 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-19 14:08:30,138 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-19 14:08:30,138 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-19 14:08:30,144 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:08:30" (1/1) ... [2024-11-19 14:08:30,152 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:08:30" (1/1) ... [2024-11-19 14:08:30,180 INFO L138 Inliner]: procedures = 24, calls = 36, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 168 [2024-11-19 14:08:30,181 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-19 14:08:30,181 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-19 14:08:30,181 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-19 14:08:30,181 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-19 14:08:30,198 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:08:30" (1/1) ... [2024-11-19 14:08:30,199 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:08:30" (1/1) ... [2024-11-19 14:08:30,203 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:08:30" (1/1) ... [2024-11-19 14:08:30,225 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [2, 3]. 60 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]. [2024-11-19 14:08:30,225 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:08:30" (1/1) ... [2024-11-19 14:08:30,226 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:08:30" (1/1) ... [2024-11-19 14:08:30,231 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:08:30" (1/1) ... [2024-11-19 14:08:30,235 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:08:30" (1/1) ... [2024-11-19 14:08:30,237 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:08:30" (1/1) ... [2024-11-19 14:08:30,238 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:08:30" (1/1) ... [2024-11-19 14:08:30,244 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-19 14:08:30,245 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-19 14:08:30,245 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-19 14:08:30,245 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-19 14:08:30,246 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:08:30" (1/1) ... [2024-11-19 14:08:30,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 14:08:30,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 14:08:30,282 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-19 14:08:30,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-19 14:08:30,371 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-19 14:08:30,386 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-19 14:08:30,387 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-19 14:08:30,387 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-19 14:08:30,387 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-19 14:08:30,387 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-19 14:08:30,387 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-19 14:08:30,387 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-19 14:08:30,387 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-19 14:08:30,387 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-19 14:08:30,387 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-19 14:08:30,387 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-19 14:08:30,388 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-19 14:08:30,388 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-19 14:08:30,388 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-19 14:08:30,388 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-19 14:08:30,388 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-19 14:08:30,388 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-19 14:08:30,389 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-19 14:08:30,553 INFO L238 CfgBuilder]: Building ICFG [2024-11-19 14:08:30,556 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-19 14:08:30,900 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-19 14:08:30,901 INFO L287 CfgBuilder]: Performing block encoding [2024-11-19 14:08:31,113 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-19 14:08:31,114 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-19 14:08:31,114 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:08:31 BoogieIcfgContainer [2024-11-19 14:08:31,114 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-19 14:08:31,116 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-19 14:08:31,116 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-19 14:08:31,120 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-19 14:08:31,121 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:08:29" (1/3) ... [2024-11-19 14:08:31,121 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f8f5827 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:08:31, skipping insertion in model container [2024-11-19 14:08:31,121 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:08:30" (2/3) ... [2024-11-19 14:08:31,122 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f8f5827 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:08:31, skipping insertion in model container [2024-11-19 14:08:31,122 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:08:31" (3/3) ... [2024-11-19 14:08:31,123 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-prod-cons.wvr.c [2024-11-19 14:08:31,138 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-19 14:08:31,138 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2024-11-19 14:08:31,138 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-19 14:08:31,212 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-19 14:08:31,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 55 places, 49 transitions, 119 flow [2024-11-19 14:08:31,281 INFO L124 PetriNetUnfolderBase]: 4/46 cut-off events. [2024-11-19 14:08:31,282 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-19 14:08:31,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59 conditions, 46 events. 4/46 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 126 event pairs, 0 based on Foata normal form. 0/32 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2024-11-19 14:08:31,286 INFO L82 GeneralOperation]: Start removeDead. Operand has 55 places, 49 transitions, 119 flow [2024-11-19 14:08:31,291 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 49 places, 43 transitions, 98 flow [2024-11-19 14:08:31,300 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 14:08:31,306 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=LoopHeads, 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;@841bfbf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 14:08:31,306 INFO L334 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2024-11-19 14:08:31,310 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-19 14:08:31,310 INFO L124 PetriNetUnfolderBase]: 0/3 cut-off events. [2024-11-19 14:08:31,310 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-19 14:08:31,311 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 14:08:31,311 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-19 14:08:31,313 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2024-11-19 14:08:31,317 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 14:08:31,317 INFO L85 PathProgramCache]: Analyzing trace with hash 500006, now seen corresponding path program 1 times [2024-11-19 14:08:31,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 14:08:31,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763480211] [2024-11-19 14:08:31,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 14:08:31,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 14:08:31,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 14:08:31,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 14:08:31,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 14:08:31,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763480211] [2024-11-19 14:08:31,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763480211] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 14:08:31,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 14:08:31,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 14:08:31,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175847088] [2024-11-19 14:08:31,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 14:08:31,595 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 14:08:31,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 14:08:31,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 14:08:31,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 14:08:31,639 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2024-11-19 14:08:31,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 43 transitions, 98 flow. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 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) [2024-11-19 14:08:31,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 14:08:31,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2024-11-19 14:08:31,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 14:08:32,033 INFO L124 PetriNetUnfolderBase]: 777/1391 cut-off events. [2024-11-19 14:08:32,034 INFO L125 PetriNetUnfolderBase]: For 81/81 co-relation queries the response was YES. [2024-11-19 14:08:32,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2674 conditions, 1391 events. 777/1391 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 8374 event pairs, 617 based on Foata normal form. 1/1063 useless extension candidates. Maximal degree in co-relation 2550. Up to 1131 conditions per place. [2024-11-19 14:08:32,053 INFO L140 encePairwiseOnDemand]: 42/49 looper letters, 23 selfloop transitions, 4 changer transitions 0/40 dead transitions. [2024-11-19 14:08:32,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 40 transitions, 146 flow [2024-11-19 14:08:32,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 14:08:32,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 14:08:32,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 94 transitions. [2024-11-19 14:08:32,068 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47959183673469385 [2024-11-19 14:08:32,070 INFO L175 Difference]: Start difference. First operand has 49 places, 43 transitions, 98 flow. Second operand 4 states and 94 transitions. [2024-11-19 14:08:32,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 40 transitions, 146 flow [2024-11-19 14:08:32,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 40 transitions, 140 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-19 14:08:32,081 INFO L231 Difference]: Finished difference. Result has 45 places, 40 transitions, 94 flow [2024-11-19 14:08:32,083 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=94, PETRI_PLACES=45, PETRI_TRANSITIONS=40} [2024-11-19 14:08:32,088 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, -4 predicate places. [2024-11-19 14:08:32,089 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 40 transitions, 94 flow [2024-11-19 14:08:32,089 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 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) [2024-11-19 14:08:32,089 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 14:08:32,089 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-19 14:08:32,090 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-19 14:08:32,090 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2024-11-19 14:08:32,090 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 14:08:32,091 INFO L85 PathProgramCache]: Analyzing trace with hash 15500688, now seen corresponding path program 1 times [2024-11-19 14:08:32,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 14:08:32,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331530969] [2024-11-19 14:08:32,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 14:08:32,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 14:08:32,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 14:08:32,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 14:08:32,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 14:08:32,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331530969] [2024-11-19 14:08:32,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331530969] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 14:08:32,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 14:08:32,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 14:08:32,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645573484] [2024-11-19 14:08:32,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 14:08:32,197 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 14:08:32,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 14:08:32,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 14:08:32,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 14:08:32,212 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2024-11-19 14:08:32,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 40 transitions, 94 flow. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 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) [2024-11-19 14:08:32,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 14:08:32,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2024-11-19 14:08:32,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 14:08:32,468 INFO L124 PetriNetUnfolderBase]: 778/1395 cut-off events. [2024-11-19 14:08:32,468 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-11-19 14:08:32,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2669 conditions, 1395 events. 778/1395 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 8401 event pairs, 617 based on Foata normal form. 1/1067 useless extension candidates. Maximal degree in co-relation 2641. Up to 1136 conditions per place. [2024-11-19 14:08:32,478 INFO L140 encePairwiseOnDemand]: 44/49 looper letters, 26 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-11-19 14:08:32,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 43 transitions, 166 flow [2024-11-19 14:08:32,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 14:08:32,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 14:08:32,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 95 transitions. [2024-11-19 14:08:32,482 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4846938775510204 [2024-11-19 14:08:32,482 INFO L175 Difference]: Start difference. First operand has 45 places, 40 transitions, 94 flow. Second operand 4 states and 95 transitions. [2024-11-19 14:08:32,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 43 transitions, 166 flow [2024-11-19 14:08:32,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 43 transitions, 152 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-19 14:08:32,485 INFO L231 Difference]: Finished difference. Result has 47 places, 43 transitions, 113 flow [2024-11-19 14:08:32,486 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=113, PETRI_PLACES=47, PETRI_TRANSITIONS=43} [2024-11-19 14:08:32,486 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, -2 predicate places. [2024-11-19 14:08:32,486 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 43 transitions, 113 flow [2024-11-19 14:08:32,487 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 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) [2024-11-19 14:08:32,487 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 14:08:32,487 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2024-11-19 14:08:32,487 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-19 14:08:32,488 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2024-11-19 14:08:32,489 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 14:08:32,489 INFO L85 PathProgramCache]: Analyzing trace with hash -2074985736, now seen corresponding path program 1 times [2024-11-19 14:08:32,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 14:08:32,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2402342] [2024-11-19 14:08:32,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 14:08:32,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 14:08:32,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 14:08:32,637 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 14:08:32,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 14:08:32,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2402342] [2024-11-19 14:08:32,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2402342] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 14:08:32,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405039441] [2024-11-19 14:08:32,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 14:08:32,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 14:08:32,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 14:08:32,642 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 14:08:32,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-19 14:08:32,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 14:08:32,720 INFO L255 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-19 14:08:32,726 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 14:08:32,770 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 14:08:32,771 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 14:08:32,826 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 14:08:32,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405039441] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 14:08:32,827 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 14:08:32,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2024-11-19 14:08:32,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780109997] [2024-11-19 14:08:32,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 14:08:32,829 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-19 14:08:32,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 14:08:32,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-19 14:08:32,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-11-19 14:08:32,846 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2024-11-19 14:08:32,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 43 transitions, 113 flow. Second operand has 10 states, 10 states have (on average 17.0) internal successors, (170), 10 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 14:08:32,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 14:08:32,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2024-11-19 14:08:32,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 14:08:33,118 INFO L124 PetriNetUnfolderBase]: 781/1407 cut-off events. [2024-11-19 14:08:33,120 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2024-11-19 14:08:33,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2705 conditions, 1407 events. 781/1407 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 8527 event pairs, 617 based on Foata normal form. 0/1075 useless extension candidates. Maximal degree in co-relation 2648. Up to 1139 conditions per place. [2024-11-19 14:08:33,130 INFO L140 encePairwiseOnDemand]: 44/49 looper letters, 26 selfloop transitions, 13 changer transitions 0/52 dead transitions. [2024-11-19 14:08:33,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 52 transitions, 227 flow [2024-11-19 14:08:33,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-19 14:08:33,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-19 14:08:33,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 202 transitions. [2024-11-19 14:08:33,132 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4122448979591837 [2024-11-19 14:08:33,133 INFO L175 Difference]: Start difference. First operand has 47 places, 43 transitions, 113 flow. Second operand 10 states and 202 transitions. [2024-11-19 14:08:33,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 52 transitions, 227 flow [2024-11-19 14:08:33,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 52 transitions, 224 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 14:08:33,134 INFO L231 Difference]: Finished difference. Result has 58 places, 52 transitions, 190 flow [2024-11-19 14:08:33,135 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=190, PETRI_PLACES=58, PETRI_TRANSITIONS=52} [2024-11-19 14:08:33,135 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 9 predicate places. [2024-11-19 14:08:33,136 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 52 transitions, 190 flow [2024-11-19 14:08:33,136 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.0) internal successors, (170), 10 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 14:08:33,136 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 14:08:33,136 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 14:08:33,155 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-19 14:08:33,340 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 [2024-11-19 14:08:33,341 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2024-11-19 14:08:33,342 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 14:08:33,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1441425958, now seen corresponding path program 1 times [2024-11-19 14:08:33,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 14:08:33,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735678703] [2024-11-19 14:08:33,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 14:08:33,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 14:08:33,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 14:08:33,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 14:08:33,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 14:08:33,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735678703] [2024-11-19 14:08:33,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735678703] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 14:08:33,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 14:08:33,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 14:08:33,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019770688] [2024-11-19 14:08:33,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 14:08:33,462 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 14:08:33,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 14:08:33,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 14:08:33,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 14:08:33,463 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-11-19 14:08:33,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 52 transitions, 190 flow. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 14:08:33,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 14:08:33,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-11-19 14:08:33,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 14:08:33,679 INFO L124 PetriNetUnfolderBase]: 897/1653 cut-off events. [2024-11-19 14:08:33,679 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2024-11-19 14:08:33,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3208 conditions, 1653 events. 897/1653 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 10024 event pairs, 733 based on Foata normal form. 34/1357 useless extension candidates. Maximal degree in co-relation 3172. Up to 1143 conditions per place. [2024-11-19 14:08:33,692 INFO L140 encePairwiseOnDemand]: 42/49 looper letters, 35 selfloop transitions, 2 changer transitions 14/65 dead transitions. [2024-11-19 14:08:33,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 65 transitions, 324 flow [2024-11-19 14:08:33,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 14:08:33,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 14:08:33,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 118 transitions. [2024-11-19 14:08:33,695 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6020408163265306 [2024-11-19 14:08:33,695 INFO L175 Difference]: Start difference. First operand has 58 places, 52 transitions, 190 flow. Second operand 4 states and 118 transitions. [2024-11-19 14:08:33,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 65 transitions, 324 flow [2024-11-19 14:08:33,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 65 transitions, 294 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-11-19 14:08:33,700 INFO L231 Difference]: Finished difference. Result has 59 places, 51 transitions, 168 flow [2024-11-19 14:08:33,700 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=168, PETRI_PLACES=59, PETRI_TRANSITIONS=51} [2024-11-19 14:08:33,701 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 10 predicate places. [2024-11-19 14:08:33,702 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 51 transitions, 168 flow [2024-11-19 14:08:33,702 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 14:08:33,702 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 14:08:33,702 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 14:08:33,703 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-19 14:08:33,703 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2024-11-19 14:08:33,704 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 14:08:33,704 INFO L85 PathProgramCache]: Analyzing trace with hash -279816382, now seen corresponding path program 1 times [2024-11-19 14:08:33,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 14:08:33,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641474411] [2024-11-19 14:08:33,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 14:08:33,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 14:08:33,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 14:08:33,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 14:08:33,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 14:08:33,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641474411] [2024-11-19 14:08:33,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641474411] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 14:08:33,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754100688] [2024-11-19 14:08:33,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 14:08:33,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 14:08:33,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 14:08:33,836 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 14:08:33,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-19 14:08:33,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 14:08:33,914 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-19 14:08:33,915 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 14:08:33,934 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 14:08:33,935 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-19 14:08:33,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754100688] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 14:08:33,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-19 14:08:33,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4] total 5 [2024-11-19 14:08:33,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434355288] [2024-11-19 14:08:33,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 14:08:33,936 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 14:08:33,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 14:08:33,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 14:08:33,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-19 14:08:33,937 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-11-19 14:08:33,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 51 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 14:08:33,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 14:08:33,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-11-19 14:08:33,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 14:08:34,034 INFO L124 PetriNetUnfolderBase]: 571/1059 cut-off events. [2024-11-19 14:08:34,035 INFO L125 PetriNetUnfolderBase]: For 129/129 co-relation queries the response was YES. [2024-11-19 14:08:34,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2150 conditions, 1059 events. 571/1059 cut-off events. For 129/129 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 5848 event pairs, 456 based on Foata normal form. 0/892 useless extension candidates. Maximal degree in co-relation 2128. Up to 849 conditions per place. [2024-11-19 14:08:34,042 INFO L140 encePairwiseOnDemand]: 46/49 looper letters, 34 selfloop transitions, 1 changer transitions 0/49 dead transitions. [2024-11-19 14:08:34,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 49 transitions, 230 flow [2024-11-19 14:08:34,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 14:08:34,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 14:08:34,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 80 transitions. [2024-11-19 14:08:34,044 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.54421768707483 [2024-11-19 14:08:34,044 INFO L175 Difference]: Start difference. First operand has 59 places, 51 transitions, 168 flow. Second operand 3 states and 80 transitions. [2024-11-19 14:08:34,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 49 transitions, 230 flow [2024-11-19 14:08:34,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 49 transitions, 226 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 14:08:34,046 INFO L231 Difference]: Finished difference. Result has 56 places, 49 transitions, 158 flow [2024-11-19 14:08:34,046 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=158, PETRI_PLACES=56, PETRI_TRANSITIONS=49} [2024-11-19 14:08:34,047 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 7 predicate places. [2024-11-19 14:08:34,047 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 49 transitions, 158 flow [2024-11-19 14:08:34,047 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 14:08:34,048 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 14:08:34,048 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 14:08:34,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-19 14:08:34,252 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 14:08:34,253 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2024-11-19 14:08:34,253 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 14:08:34,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1679413092, now seen corresponding path program 1 times [2024-11-19 14:08:34,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 14:08:34,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830014586] [2024-11-19 14:08:34,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 14:08:34,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 14:08:34,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 14:08:34,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 14:08:34,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 14:08:34,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830014586] [2024-11-19 14:08:34,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830014586] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 14:08:34,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 14:08:34,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 14:08:34,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628513681] [2024-11-19 14:08:34,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 14:08:34,299 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 14:08:34,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 14:08:34,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 14:08:34,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 14:08:34,306 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 49 [2024-11-19 14:08:34,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 49 transitions, 158 flow. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 14:08:34,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 14:08:34,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 49 [2024-11-19 14:08:34,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 14:08:34,495 INFO L124 PetriNetUnfolderBase]: 784/1423 cut-off events. [2024-11-19 14:08:34,496 INFO L125 PetriNetUnfolderBase]: For 137/137 co-relation queries the response was YES. [2024-11-19 14:08:34,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2867 conditions, 1423 events. 784/1423 cut-off events. For 137/137 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 8177 event pairs, 296 based on Foata normal form. 44/1184 useless extension candidates. Maximal degree in co-relation 2854. Up to 626 conditions per place. [2024-11-19 14:08:34,504 INFO L140 encePairwiseOnDemand]: 44/49 looper letters, 58 selfloop transitions, 4 changer transitions 0/73 dead transitions. [2024-11-19 14:08:34,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 73 transitions, 342 flow [2024-11-19 14:08:34,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 14:08:34,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 14:08:34,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 112 transitions. [2024-11-19 14:08:34,506 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-11-19 14:08:34,506 INFO L175 Difference]: Start difference. First operand has 56 places, 49 transitions, 158 flow. Second operand 4 states and 112 transitions. [2024-11-19 14:08:34,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 73 transitions, 342 flow [2024-11-19 14:08:34,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 73 transitions, 341 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 14:08:34,510 INFO L231 Difference]: Finished difference. Result has 58 places, 49 transitions, 170 flow [2024-11-19 14:08:34,511 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=170, PETRI_PLACES=58, PETRI_TRANSITIONS=49} [2024-11-19 14:08:34,511 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 9 predicate places. [2024-11-19 14:08:34,511 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 49 transitions, 170 flow [2024-11-19 14:08:34,512 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 14:08:34,512 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 14:08:34,512 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 14:08:34,512 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-19 14:08:34,512 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2024-11-19 14:08:34,512 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 14:08:34,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1295344994, now seen corresponding path program 1 times [2024-11-19 14:08:34,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 14:08:34,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334500196] [2024-11-19 14:08:34,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 14:08:34,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 14:08:34,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 14:08:34,576 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 14:08:34,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 14:08:34,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334500196] [2024-11-19 14:08:34,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334500196] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 14:08:34,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 14:08:34,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 14:08:34,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176178605] [2024-11-19 14:08:34,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 14:08:34,578 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 14:08:34,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 14:08:34,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 14:08:34,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 14:08:34,580 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-11-19 14:08:34,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 49 transitions, 170 flow. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 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) [2024-11-19 14:08:34,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 14:08:34,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-11-19 14:08:34,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 14:08:34,716 INFO L124 PetriNetUnfolderBase]: 687/1260 cut-off events. [2024-11-19 14:08:34,716 INFO L125 PetriNetUnfolderBase]: For 332/363 co-relation queries the response was YES. [2024-11-19 14:08:34,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2901 conditions, 1260 events. 687/1260 cut-off events. For 332/363 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 6780 event pairs, 220 based on Foata normal form. 49/1183 useless extension candidates. Maximal degree in co-relation 2887. Up to 782 conditions per place. [2024-11-19 14:08:34,724 INFO L140 encePairwiseOnDemand]: 46/49 looper letters, 43 selfloop transitions, 2 changer transitions 4/62 dead transitions. [2024-11-19 14:08:34,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 62 transitions, 306 flow [2024-11-19 14:08:34,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 14:08:34,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 14:08:34,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 91 transitions. [2024-11-19 14:08:34,725 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-11-19 14:08:34,725 INFO L175 Difference]: Start difference. First operand has 58 places, 49 transitions, 170 flow. Second operand 3 states and 91 transitions. [2024-11-19 14:08:34,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 62 transitions, 306 flow [2024-11-19 14:08:34,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 62 transitions, 300 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 14:08:34,729 INFO L231 Difference]: Finished difference. Result has 59 places, 50 transitions, 179 flow [2024-11-19 14:08:34,730 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=179, PETRI_PLACES=59, PETRI_TRANSITIONS=50} [2024-11-19 14:08:34,732 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 10 predicate places. [2024-11-19 14:08:34,732 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 50 transitions, 179 flow [2024-11-19 14:08:34,732 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 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) [2024-11-19 14:08:34,732 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 14:08:34,732 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 14:08:34,733 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-19 14:08:34,733 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2024-11-19 14:08:34,733 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 14:08:34,733 INFO L85 PathProgramCache]: Analyzing trace with hash 522198821, now seen corresponding path program 1 times [2024-11-19 14:08:34,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 14:08:34,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264734933] [2024-11-19 14:08:34,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 14:08:34,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 14:08:34,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 14:08:34,792 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 14:08:34,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 14:08:34,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264734933] [2024-11-19 14:08:34,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264734933] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 14:08:34,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 14:08:34,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 14:08:34,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15934671] [2024-11-19 14:08:34,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 14:08:34,793 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 14:08:34,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 14:08:34,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 14:08:34,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-19 14:08:34,815 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2024-11-19 14:08:34,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 50 transitions, 179 flow. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 14:08:34,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 14:08:34,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2024-11-19 14:08:34,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 14:08:35,027 INFO L124 PetriNetUnfolderBase]: 687/1302 cut-off events. [2024-11-19 14:08:35,027 INFO L125 PetriNetUnfolderBase]: For 473/497 co-relation queries the response was YES. [2024-11-19 14:08:35,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2958 conditions, 1302 events. 687/1302 cut-off events. For 473/497 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 7378 event pairs, 167 based on Foata normal form. 24/1196 useless extension candidates. Maximal degree in co-relation 2942. Up to 532 conditions per place. [2024-11-19 14:08:35,034 INFO L140 encePairwiseOnDemand]: 43/49 looper letters, 52 selfloop transitions, 6 changer transitions 3/73 dead transitions. [2024-11-19 14:08:35,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 73 transitions, 363 flow [2024-11-19 14:08:35,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 14:08:35,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 14:08:35,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-11-19 14:08:35,036 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5265306122448979 [2024-11-19 14:08:35,036 INFO L175 Difference]: Start difference. First operand has 59 places, 50 transitions, 179 flow. Second operand 5 states and 129 transitions. [2024-11-19 14:08:35,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 73 transitions, 363 flow [2024-11-19 14:08:35,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 73 transitions, 351 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-11-19 14:08:35,040 INFO L231 Difference]: Finished difference. Result has 60 places, 48 transitions, 179 flow [2024-11-19 14:08:35,040 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=179, PETRI_PLACES=60, PETRI_TRANSITIONS=48} [2024-11-19 14:08:35,043 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 11 predicate places. [2024-11-19 14:08:35,043 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 48 transitions, 179 flow [2024-11-19 14:08:35,043 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 14:08:35,043 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 14:08:35,043 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 1, 1] [2024-11-19 14:08:35,044 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-19 14:08:35,044 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2024-11-19 14:08:35,044 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 14:08:35,044 INFO L85 PathProgramCache]: Analyzing trace with hash -278817904, now seen corresponding path program 2 times [2024-11-19 14:08:35,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 14:08:35,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310939946] [2024-11-19 14:08:35,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 14:08:35,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 14:08:35,061 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-19 14:08:35,062 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 14:08:35,092 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-19 14:08:35,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 14:08:35,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310939946] [2024-11-19 14:08:35,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310939946] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 14:08:35,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314596238] [2024-11-19 14:08:35,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 14:08:35,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 14:08:35,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 14:08:35,095 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 14:08:35,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-19 14:08:35,172 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-19 14:08:35,172 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 14:08:35,175 INFO L255 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-19 14:08:35,176 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 14:08:35,213 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-19 14:08:35,213 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 14:08:35,247 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-19 14:08:35,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314596238] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 14:08:35,248 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 14:08:35,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 2 [2024-11-19 14:08:35,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369184343] [2024-11-19 14:08:35,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 14:08:35,249 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 14:08:35,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 14:08:35,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 14:08:35,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 14:08:35,254 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2024-11-19 14:08:35,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 48 transitions, 179 flow. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 14:08:35,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 14:08:35,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2024-11-19 14:08:35,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 14:08:35,377 INFO L124 PetriNetUnfolderBase]: 529/1013 cut-off events. [2024-11-19 14:08:35,378 INFO L125 PetriNetUnfolderBase]: For 578/585 co-relation queries the response was YES. [2024-11-19 14:08:35,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2413 conditions, 1013 events. 529/1013 cut-off events. For 578/585 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 5341 event pairs, 403 based on Foata normal form. 8/866 useless extension candidates. Maximal degree in co-relation 2397. Up to 790 conditions per place. [2024-11-19 14:08:35,385 INFO L140 encePairwiseOnDemand]: 44/49 looper letters, 21 selfloop transitions, 15 changer transitions 0/47 dead transitions. [2024-11-19 14:08:35,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 47 transitions, 241 flow [2024-11-19 14:08:35,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 14:08:35,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 14:08:35,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 88 transitions. [2024-11-19 14:08:35,386 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4489795918367347 [2024-11-19 14:08:35,386 INFO L175 Difference]: Start difference. First operand has 60 places, 48 transitions, 179 flow. Second operand 4 states and 88 transitions. [2024-11-19 14:08:35,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 47 transitions, 241 flow [2024-11-19 14:08:35,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 47 transitions, 219 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-11-19 14:08:35,389 INFO L231 Difference]: Finished difference. Result has 53 places, 47 transitions, 177 flow [2024-11-19 14:08:35,390 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=177, PETRI_PLACES=53, PETRI_TRANSITIONS=47} [2024-11-19 14:08:35,390 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 4 predicate places. [2024-11-19 14:08:35,391 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 47 transitions, 177 flow [2024-11-19 14:08:35,391 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 14:08:35,391 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 14:08:35,391 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 14:08:35,409 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-19 14:08:35,595 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 14:08:35,596 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2024-11-19 14:08:35,597 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 14:08:35,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1746797091, now seen corresponding path program 1 times [2024-11-19 14:08:35,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 14:08:35,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419598713] [2024-11-19 14:08:35,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 14:08:35,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 14:08:35,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 14:08:36,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 14:08:36,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 14:08:36,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419598713] [2024-11-19 14:08:36,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419598713] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 14:08:36,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324938614] [2024-11-19 14:08:36,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 14:08:36,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 14:08:36,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 14:08:36,095 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 14:08:36,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-19 14:08:36,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 14:08:36,175 INFO L255 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-19 14:08:36,177 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 14:08:36,265 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-19 14:08:36,677 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-19 14:08:36,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 14:08:36,704 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 14:08:37,132 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 20 treesize of output 18 [2024-11-19 14:08:37,139 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 26 treesize of output 20 [2024-11-19 14:08:37,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 14:08:37,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324938614] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 14:08:37,189 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 14:08:37,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2024-11-19 14:08:37,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733336703] [2024-11-19 14:08:37,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 14:08:37,190 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-19 14:08:37,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 14:08:37,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-19 14:08:37,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2024-11-19 14:08:37,371 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2024-11-19 14:08:37,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 47 transitions, 177 flow. Second operand has 20 states, 20 states have (on average 17.8) internal successors, (356), 20 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 14:08:37,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 14:08:37,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2024-11-19 14:08:37,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 14:08:38,935 INFO L124 PetriNetUnfolderBase]: 1402/2626 cut-off events. [2024-11-19 14:08:38,936 INFO L125 PetriNetUnfolderBase]: For 596/669 co-relation queries the response was YES. [2024-11-19 14:08:38,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5773 conditions, 2626 events. 1402/2626 cut-off events. For 596/669 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 16188 event pairs, 331 based on Foata normal form. 73/2495 useless extension candidates. Maximal degree in co-relation 5761. Up to 754 conditions per place. [2024-11-19 14:08:38,953 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 113 selfloop transitions, 23 changer transitions 8/155 dead transitions. [2024-11-19 14:08:38,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 155 transitions, 783 flow [2024-11-19 14:08:38,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-19 14:08:38,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-19 14:08:38,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 375 transitions. [2024-11-19 14:08:38,956 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5102040816326531 [2024-11-19 14:08:38,956 INFO L175 Difference]: Start difference. First operand has 53 places, 47 transitions, 177 flow. Second operand 15 states and 375 transitions. [2024-11-19 14:08:38,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 155 transitions, 783 flow [2024-11-19 14:08:38,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 155 transitions, 753 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-19 14:08:38,989 INFO L231 Difference]: Finished difference. Result has 68 places, 58 transitions, 269 flow [2024-11-19 14:08:38,989 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=269, PETRI_PLACES=68, PETRI_TRANSITIONS=58} [2024-11-19 14:08:38,990 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 19 predicate places. [2024-11-19 14:08:38,990 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 58 transitions, 269 flow [2024-11-19 14:08:38,990 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 17.8) internal successors, (356), 20 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 14:08:38,990 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 14:08:38,991 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 14:08:39,009 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-19 14:08:39,191 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 14:08:39,191 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2024-11-19 14:08:39,192 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 14:08:39,192 INFO L85 PathProgramCache]: Analyzing trace with hash 2124995856, now seen corresponding path program 1 times [2024-11-19 14:08:39,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 14:08:39,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918459812] [2024-11-19 14:08:39,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 14:08:39,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 14:08:39,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 14:08:39,991 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 14:08:39,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 14:08:39,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918459812] [2024-11-19 14:08:39,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918459812] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 14:08:39,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742084010] [2024-11-19 14:08:39,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 14:08:39,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 14:08:39,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 14:08:39,994 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 14:08:39,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-19 14:08:40,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 14:08:40,069 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-19 14:08:40,071 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 14:08:40,227 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 14:08:40,228 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 14:08:40,290 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 14:08:40,291 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-11-19 14:08:40,376 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-19 14:08:40,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742084010] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-19 14:08:40,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-19 14:08:40,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 5] total 16 [2024-11-19 14:08:40,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248455958] [2024-11-19 14:08:40,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 14:08:40,380 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 14:08:40,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 14:08:40,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 14:08:40,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2024-11-19 14:08:40,386 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-11-19 14:08:40,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 58 transitions, 269 flow. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 14:08:40,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 14:08:40,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-11-19 14:08:40,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 14:08:40,702 INFO L124 PetriNetUnfolderBase]: 1572/2884 cut-off events. [2024-11-19 14:08:40,703 INFO L125 PetriNetUnfolderBase]: For 1944/2025 co-relation queries the response was YES. [2024-11-19 14:08:40,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7392 conditions, 2884 events. 1572/2884 cut-off events. For 1944/2025 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 17459 event pairs, 213 based on Foata normal form. 145/2929 useless extension candidates. Maximal degree in co-relation 7376. Up to 767 conditions per place. [2024-11-19 14:08:40,721 INFO L140 encePairwiseOnDemand]: 43/49 looper letters, 68 selfloop transitions, 12 changer transitions 4/95 dead transitions. [2024-11-19 14:08:40,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 95 transitions, 562 flow [2024-11-19 14:08:40,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 14:08:40,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 14:08:40,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 148 transitions. [2024-11-19 14:08:40,723 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6040816326530613 [2024-11-19 14:08:40,723 INFO L175 Difference]: Start difference. First operand has 68 places, 58 transitions, 269 flow. Second operand 5 states and 148 transitions. [2024-11-19 14:08:40,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 95 transitions, 562 flow [2024-11-19 14:08:40,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 95 transitions, 551 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-11-19 14:08:40,734 INFO L231 Difference]: Finished difference. Result has 71 places, 62 transitions, 338 flow [2024-11-19 14:08:40,734 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=338, PETRI_PLACES=71, PETRI_TRANSITIONS=62} [2024-11-19 14:08:40,735 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 22 predicate places. [2024-11-19 14:08:40,735 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 62 transitions, 338 flow [2024-11-19 14:08:40,736 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 14:08:40,736 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 14:08:40,736 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 14:08:40,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-19 14:08:40,940 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-19 14:08:40,941 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2024-11-19 14:08:40,942 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 14:08:40,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1100904541, now seen corresponding path program 1 times [2024-11-19 14:08:40,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 14:08:40,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67029577] [2024-11-19 14:08:40,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 14:08:40,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 14:08:40,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 14:08:41,074 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 14:08:41,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 14:08:41,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67029577] [2024-11-19 14:08:41,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67029577] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 14:08:41,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897447403] [2024-11-19 14:08:41,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 14:08:41,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 14:08:41,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 14:08:41,077 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 14:08:41,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-19 14:08:41,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 14:08:41,159 INFO L255 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-19 14:08:41,160 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 14:08:41,202 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 14:08:41,202 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-19 14:08:41,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897447403] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 14:08:41,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-19 14:08:41,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2024-11-19 14:08:41,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247135595] [2024-11-19 14:08:41,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 14:08:41,203 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 14:08:41,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 14:08:41,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 14:08:41,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-19 14:08:41,204 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-11-19 14:08:41,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 62 transitions, 338 flow. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 14:08:41,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 14:08:41,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-11-19 14:08:41,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 14:08:41,784 INFO L124 PetriNetUnfolderBase]: 3397/6169 cut-off events. [2024-11-19 14:08:41,784 INFO L125 PetriNetUnfolderBase]: For 10194/10329 co-relation queries the response was YES. [2024-11-19 14:08:41,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17923 conditions, 6169 events. 3397/6169 cut-off events. For 10194/10329 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 42069 event pairs, 808 based on Foata normal form. 199/6150 useless extension candidates. Maximal degree in co-relation 17903. Up to 1950 conditions per place. [2024-11-19 14:08:41,828 INFO L140 encePairwiseOnDemand]: 46/49 looper letters, 91 selfloop transitions, 13 changer transitions 0/115 dead transitions. [2024-11-19 14:08:41,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 115 transitions, 856 flow [2024-11-19 14:08:41,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 14:08:41,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 14:08:41,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 129 transitions. [2024-11-19 14:08:41,830 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6581632653061225 [2024-11-19 14:08:41,830 INFO L175 Difference]: Start difference. First operand has 71 places, 62 transitions, 338 flow. Second operand 4 states and 129 transitions. [2024-11-19 14:08:41,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 115 transitions, 856 flow [2024-11-19 14:08:41,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 115 transitions, 840 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-11-19 14:08:41,868 INFO L231 Difference]: Finished difference. Result has 75 places, 71 transitions, 473 flow [2024-11-19 14:08:41,868 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=330, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=473, PETRI_PLACES=75, PETRI_TRANSITIONS=71} [2024-11-19 14:08:41,869 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 26 predicate places. [2024-11-19 14:08:41,869 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 71 transitions, 473 flow [2024-11-19 14:08:41,870 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 14:08:41,870 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 14:08:41,870 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 14:08:41,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-19 14:08:42,071 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 14:08:42,072 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2024-11-19 14:08:42,072 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 14:08:42,072 INFO L85 PathProgramCache]: Analyzing trace with hash -2081484439, now seen corresponding path program 2 times [2024-11-19 14:08:42,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 14:08:42,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648260226] [2024-11-19 14:08:42,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 14:08:42,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 14:08:42,093 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-19 14:08:42,094 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 14:08:42,180 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-19 14:08:42,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 14:08:42,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648260226] [2024-11-19 14:08:42,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648260226] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 14:08:42,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 14:08:42,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 14:08:42,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819555751] [2024-11-19 14:08:42,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 14:08:42,182 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 14:08:42,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 14:08:42,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 14:08:42,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-19 14:08:42,188 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-11-19 14:08:42,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 71 transitions, 473 flow. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 14:08:42,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 14:08:42,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-11-19 14:08:42,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 14:08:42,861 INFO L124 PetriNetUnfolderBase]: 3301/6077 cut-off events. [2024-11-19 14:08:42,862 INFO L125 PetriNetUnfolderBase]: For 11996/12149 co-relation queries the response was YES. [2024-11-19 14:08:42,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18282 conditions, 6077 events. 3301/6077 cut-off events. For 11996/12149 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 41670 event pairs, 355 based on Foata normal form. 231/6106 useless extension candidates. Maximal degree in co-relation 18259. Up to 2373 conditions per place. [2024-11-19 14:08:42,899 INFO L140 encePairwiseOnDemand]: 44/49 looper letters, 77 selfloop transitions, 14 changer transitions 4/106 dead transitions. [2024-11-19 14:08:42,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 106 transitions, 786 flow [2024-11-19 14:08:42,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 14:08:42,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 14:08:42,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 147 transitions. [2024-11-19 14:08:42,901 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-11-19 14:08:42,901 INFO L175 Difference]: Start difference. First operand has 75 places, 71 transitions, 473 flow. Second operand 5 states and 147 transitions. [2024-11-19 14:08:42,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 106 transitions, 786 flow [2024-11-19 14:08:42,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 106 transitions, 759 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-11-19 14:08:42,942 INFO L231 Difference]: Finished difference. Result has 77 places, 70 transitions, 468 flow [2024-11-19 14:08:42,942 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=440, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=468, PETRI_PLACES=77, PETRI_TRANSITIONS=70} [2024-11-19 14:08:42,943 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 28 predicate places. [2024-11-19 14:08:42,944 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 70 transitions, 468 flow [2024-11-19 14:08:42,944 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 14:08:42,944 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 14:08:42,944 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 14:08:42,944 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-19 14:08:42,945 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2024-11-19 14:08:42,945 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 14:08:42,945 INFO L85 PathProgramCache]: Analyzing trace with hash -453552873, now seen corresponding path program 1 times [2024-11-19 14:08:42,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 14:08:42,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187008704] [2024-11-19 14:08:42,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 14:08:42,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 14:08:42,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 14:08:43,052 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 14:08:43,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 14:08:43,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187008704] [2024-11-19 14:08:43,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187008704] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 14:08:43,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421642262] [2024-11-19 14:08:43,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 14:08:43,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 14:08:43,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 14:08:43,055 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 14:08:43,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-19 14:08:43,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 14:08:43,138 INFO L255 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-19 14:08:43,140 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 14:08:43,225 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 14:08:43,226 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 14:08:43,423 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 14:08:43,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421642262] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 14:08:43,424 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 14:08:43,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2024-11-19 14:08:43,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538153388] [2024-11-19 14:08:43,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 14:08:43,424 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-19 14:08:43,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 14:08:43,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-19 14:08:43,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2024-11-19 14:08:43,460 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2024-11-19 14:08:43,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 70 transitions, 468 flow. Second operand has 15 states, 15 states have (on average 18.333333333333332) internal successors, (275), 15 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 14:08:43,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 14:08:43,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2024-11-19 14:08:43,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 14:08:43,932 INFO L124 PetriNetUnfolderBase]: 2339/4437 cut-off events. [2024-11-19 14:08:43,932 INFO L125 PetriNetUnfolderBase]: For 9114/9229 co-relation queries the response was YES. [2024-11-19 14:08:43,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13028 conditions, 4437 events. 2339/4437 cut-off events. For 9114/9229 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 29371 event pairs, 1647 based on Foata normal form. 119/4341 useless extension candidates. Maximal degree in co-relation 13005. Up to 3008 conditions per place. [2024-11-19 14:08:43,960 INFO L140 encePairwiseOnDemand]: 44/49 looper letters, 35 selfloop transitions, 10 changer transitions 30/86 dead transitions. [2024-11-19 14:08:43,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 86 transitions, 595 flow [2024-11-19 14:08:43,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-19 14:08:43,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-19 14:08:43,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-11-19 14:08:43,962 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46938775510204084 [2024-11-19 14:08:43,962 INFO L175 Difference]: Start difference. First operand has 77 places, 70 transitions, 468 flow. Second operand 8 states and 184 transitions. [2024-11-19 14:08:43,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 86 transitions, 595 flow [2024-11-19 14:08:43,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 86 transitions, 562 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-19 14:08:43,974 INFO L231 Difference]: Finished difference. Result has 78 places, 56 transitions, 324 flow [2024-11-19 14:08:43,974 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=339, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=324, PETRI_PLACES=78, PETRI_TRANSITIONS=56} [2024-11-19 14:08:43,974 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 29 predicate places. [2024-11-19 14:08:43,975 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 56 transitions, 324 flow [2024-11-19 14:08:43,975 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 18.333333333333332) internal successors, (275), 15 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 14:08:43,975 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 14:08:43,975 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 14:08:43,993 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-19 14:08:44,179 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 14:08:44,180 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2024-11-19 14:08:44,181 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 14:08:44,181 INFO L85 PathProgramCache]: Analyzing trace with hash 560903853, now seen corresponding path program 2 times [2024-11-19 14:08:44,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 14:08:44,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225562248] [2024-11-19 14:08:44,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 14:08:44,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 14:08:44,221 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 14:08:44,221 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 14:08:44,380 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-19 14:08:44,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 14:08:44,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225562248] [2024-11-19 14:08:44,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225562248] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 14:08:44,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440166541] [2024-11-19 14:08:44,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 14:08:44,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 14:08:44,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 14:08:44,383 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 14:08:44,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-19 14:08:44,482 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 14:08:44,482 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 14:08:44,483 INFO L255 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-19 14:08:44,485 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 14:08:44,877 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-19 14:08:44,878 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2024-11-19 14:08:44,905 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 14:08:44,906 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 14:08:44,991 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-19 14:08:44,992 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 13 [2024-11-19 14:08:45,433 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 14:08:45,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440166541] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 14:08:45,433 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 14:08:45,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 11, 11] total 27 [2024-11-19 14:08:45,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645429271] [2024-11-19 14:08:45,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 14:08:45,434 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-19 14:08:45,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 14:08:45,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-19 14:08:45,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2024-11-19 14:08:45,552 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2024-11-19 14:08:45,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 56 transitions, 324 flow. Second operand has 29 states, 29 states have (on average 17.896551724137932) internal successors, (519), 29 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 14:08:45,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 14:08:45,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2024-11-19 14:08:45,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 14:08:47,588 INFO L124 PetriNetUnfolderBase]: 5468/10289 cut-off events. [2024-11-19 14:08:47,588 INFO L125 PetriNetUnfolderBase]: For 21722/22006 co-relation queries the response was YES. [2024-11-19 14:08:47,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29237 conditions, 10289 events. 5468/10289 cut-off events. For 21722/22006 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 77878 event pairs, 372 based on Foata normal form. 622/10609 useless extension candidates. Maximal degree in co-relation 29214. Up to 1521 conditions per place. [2024-11-19 14:08:47,650 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 312 selfloop transitions, 59 changer transitions 8/390 dead transitions. [2024-11-19 14:08:47,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 390 transitions, 2431 flow [2024-11-19 14:08:47,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-19 14:08:47,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2024-11-19 14:08:47,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 874 transitions. [2024-11-19 14:08:47,653 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5405071119356833 [2024-11-19 14:08:47,653 INFO L175 Difference]: Start difference. First operand has 78 places, 56 transitions, 324 flow. Second operand 33 states and 874 transitions. [2024-11-19 14:08:47,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 390 transitions, 2431 flow [2024-11-19 14:08:47,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 390 transitions, 2388 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-11-19 14:08:47,699 INFO L231 Difference]: Finished difference. Result has 114 places, 101 transitions, 940 flow [2024-11-19 14:08:47,700 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=299, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=940, PETRI_PLACES=114, PETRI_TRANSITIONS=101} [2024-11-19 14:08:47,700 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 65 predicate places. [2024-11-19 14:08:47,700 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 101 transitions, 940 flow [2024-11-19 14:08:47,701 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 17.896551724137932) internal successors, (519), 29 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 14:08:47,701 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 14:08:47,701 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 14:08:47,718 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-19 14:08:47,901 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,SelfDestructingSolverStorable14 [2024-11-19 14:08:47,902 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2024-11-19 14:08:47,903 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 14:08:47,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1590476411, now seen corresponding path program 3 times [2024-11-19 14:08:47,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 14:08:47,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20017647] [2024-11-19 14:08:47,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 14:08:47,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 14:08:47,947 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-19 14:08:47,951 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 14:08:48,107 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-19 14:08:48,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 14:08:48,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20017647] [2024-11-19 14:08:48,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20017647] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 14:08:48,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108589717] [2024-11-19 14:08:48,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 14:08:48,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 14:08:48,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 14:08:48,111 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 14:08:48,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-19 14:08:48,197 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-19 14:08:48,197 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 14:08:48,199 INFO L255 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-19 14:08:48,201 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 14:08:48,265 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-19 14:08:48,501 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-19 14:08:48,501 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2024-11-19 14:08:48,519 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 14:08:48,519 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 14:08:49,234 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 41 treesize of output 37 [2024-11-19 14:08:49,248 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-11-19 14:08:49,248 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 55 treesize of output 47 [2024-11-19 14:08:49,373 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 14:08:49,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108589717] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 14:08:49,374 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 14:08:49,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 11, 11] total 27 [2024-11-19 14:08:49,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423134494] [2024-11-19 14:08:49,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 14:08:49,374 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-19 14:08:49,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 14:08:49,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-19 14:08:49,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2024-11-19 14:08:49,483 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2024-11-19 14:08:49,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 101 transitions, 940 flow. Second operand has 29 states, 29 states have (on average 17.896551724137932) internal successors, (519), 29 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 14:08:49,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 14:08:49,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2024-11-19 14:08:49,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 14:08:51,959 INFO L124 PetriNetUnfolderBase]: 6172/11827 cut-off events. [2024-11-19 14:08:51,960 INFO L125 PetriNetUnfolderBase]: For 73786/74274 co-relation queries the response was YES. [2024-11-19 14:08:51,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40920 conditions, 11827 events. 6172/11827 cut-off events. For 73786/74274 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 93153 event pairs, 662 based on Foata normal form. 442/11697 useless extension candidates. Maximal degree in co-relation 40883. Up to 1746 conditions per place. [2024-11-19 14:08:52,017 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 251 selfloop transitions, 60 changer transitions 16/338 dead transitions. [2024-11-19 14:08:52,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 338 transitions, 2686 flow [2024-11-19 14:08:52,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-19 14:08:52,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-11-19 14:08:52,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 723 transitions. [2024-11-19 14:08:52,021 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5269679300291545 [2024-11-19 14:08:52,021 INFO L175 Difference]: Start difference. First operand has 114 places, 101 transitions, 940 flow. Second operand 28 states and 723 transitions. [2024-11-19 14:08:52,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 338 transitions, 2686 flow [2024-11-19 14:08:52,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 338 transitions, 2411 flow, removed 118 selfloop flow, removed 9 redundant places. [2024-11-19 14:08:52,196 INFO L231 Difference]: Finished difference. Result has 143 places, 113 transitions, 1065 flow [2024-11-19 14:08:52,197 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=717, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=1065, PETRI_PLACES=143, PETRI_TRANSITIONS=113} [2024-11-19 14:08:52,197 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 94 predicate places. [2024-11-19 14:08:52,197 INFO L471 AbstractCegarLoop]: Abstraction has has 143 places, 113 transitions, 1065 flow [2024-11-19 14:08:52,198 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 17.896551724137932) internal successors, (519), 29 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 14:08:52,198 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 14:08:52,198 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 14:08:52,212 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-19 14:08:52,402 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,SelfDestructingSolverStorable15 [2024-11-19 14:08:52,403 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2024-11-19 14:08:52,403 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 14:08:52,403 INFO L85 PathProgramCache]: Analyzing trace with hash 235296114, now seen corresponding path program 1 times [2024-11-19 14:08:52,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 14:08:52,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87020165] [2024-11-19 14:08:52,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 14:08:52,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 14:08:52,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 14:08:53,320 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 14:08:53,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 14:08:53,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87020165] [2024-11-19 14:08:53,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87020165] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 14:08:53,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304510106] [2024-11-19 14:08:53,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 14:08:53,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 14:08:53,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 14:08:53,322 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 14:08:53,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-19 14:08:53,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 14:08:53,395 INFO L255 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-19 14:08:53,397 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 14:08:54,031 INFO L349 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2024-11-19 14:08:54,032 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 19 [2024-11-19 14:08:54,057 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 14:08:54,058 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 14:08:54,391 INFO L349 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2024-11-19 14:08:54,392 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 43 [2024-11-19 14:08:55,044 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 14:08:55,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304510106] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 14:08:55,045 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 14:08:55,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2024-11-19 14:08:55,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338968683] [2024-11-19 14:08:55,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 14:08:55,046 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-19 14:08:55,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 14:08:55,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-19 14:08:55,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1021, Unknown=0, NotChecked=0, Total=1190 [2024-11-19 14:08:55,313 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2024-11-19 14:08:55,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 113 transitions, 1065 flow. Second operand has 35 states, 35 states have (on average 17.62857142857143) internal successors, (617), 35 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 14:08:55,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 14:08:55,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2024-11-19 14:08:55,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 14:09:00,279 INFO L124 PetriNetUnfolderBase]: 11031/21498 cut-off events. [2024-11-19 14:09:00,279 INFO L125 PetriNetUnfolderBase]: For 104025/104573 co-relation queries the response was YES. [2024-11-19 14:09:00,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73748 conditions, 21498 events. 11031/21498 cut-off events. For 104025/104573 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 175767 event pairs, 718 based on Foata normal form. 1614/22462 useless extension candidates. Maximal degree in co-relation 73700. Up to 6755 conditions per place. [2024-11-19 14:09:00,402 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 321 selfloop transitions, 108 changer transitions 48/488 dead transitions. [2024-11-19 14:09:00,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 488 transitions, 4082 flow [2024-11-19 14:09:00,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-19 14:09:00,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2024-11-19 14:09:00,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 938 transitions. [2024-11-19 14:09:00,405 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5173745173745173 [2024-11-19 14:09:00,405 INFO L175 Difference]: Start difference. First operand has 143 places, 113 transitions, 1065 flow. Second operand 37 states and 938 transitions. [2024-11-19 14:09:00,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 488 transitions, 4082 flow [2024-11-19 14:09:00,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 488 transitions, 3872 flow, removed 43 selfloop flow, removed 18 redundant places. [2024-11-19 14:09:00,838 INFO L231 Difference]: Finished difference. Result has 170 places, 193 transitions, 2312 flow [2024-11-19 14:09:00,839 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=935, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=2312, PETRI_PLACES=170, PETRI_TRANSITIONS=193} [2024-11-19 14:09:00,839 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 121 predicate places. [2024-11-19 14:09:00,839 INFO L471 AbstractCegarLoop]: Abstraction has has 170 places, 193 transitions, 2312 flow [2024-11-19 14:09:00,840 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 17.62857142857143) internal successors, (617), 35 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 14:09:00,840 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 14:09:00,840 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 14:09:00,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-19 14:09:01,041 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,SelfDestructingSolverStorable16 [2024-11-19 14:09:01,041 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2024-11-19 14:09:01,042 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 14:09:01,042 INFO L85 PathProgramCache]: Analyzing trace with hash 2125079228, now seen corresponding path program 2 times [2024-11-19 14:09:01,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 14:09:01,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686696377] [2024-11-19 14:09:01,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 14:09:01,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 14:09:01,068 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 14:09:01,068 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 14:09:01,747 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 14:09:01,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 14:09:01,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686696377] [2024-11-19 14:09:01,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686696377] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 14:09:01,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130579664] [2024-11-19 14:09:01,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 14:09:01,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 14:09:01,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 14:09:01,750 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 14:09:01,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-19 14:09:01,831 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 14:09:01,832 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 14:09:01,834 INFO L255 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-19 14:09:01,839 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 14:09:02,373 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 14:09:02,374 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 14:09:02,657 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 14:09:02,657 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 51 [2024-11-19 14:09:03,127 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 14:09:03,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130579664] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 14:09:03,127 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 14:09:03,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2024-11-19 14:09:03,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964974335] [2024-11-19 14:09:03,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 14:09:03,128 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-19 14:09:03,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 14:09:03,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-19 14:09:03,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=986, Unknown=0, NotChecked=0, Total=1190 [2024-11-19 14:09:03,298 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2024-11-19 14:09:03,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 193 transitions, 2312 flow. Second operand has 35 states, 35 states have (on average 17.62857142857143) internal successors, (617), 35 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 14:09:03,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 14:09:03,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2024-11-19 14:09:03,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 14:09:08,209 INFO L124 PetriNetUnfolderBase]: 13169/25964 cut-off events. [2024-11-19 14:09:08,209 INFO L125 PetriNetUnfolderBase]: For 162381/163043 co-relation queries the response was YES. [2024-11-19 14:09:08,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95815 conditions, 25964 events. 13169/25964 cut-off events. For 162381/163043 co-relation queries the response was YES. Maximal size of possible extension queue 619. Compared 223314 event pairs, 2048 based on Foata normal form. 604/25668 useless extension candidates. Maximal degree in co-relation 95762. Up to 14177 conditions per place. [2024-11-19 14:09:08,494 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 375 selfloop transitions, 73 changer transitions 52/511 dead transitions. [2024-11-19 14:09:08,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 511 transitions, 4998 flow [2024-11-19 14:09:08,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-19 14:09:08,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2024-11-19 14:09:08,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 846 transitions. [2024-11-19 14:09:08,498 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5231910946196661 [2024-11-19 14:09:08,498 INFO L175 Difference]: Start difference. First operand has 170 places, 193 transitions, 2312 flow. Second operand 33 states and 846 transitions. [2024-11-19 14:09:08,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 511 transitions, 4998 flow [2024-11-19 14:09:09,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 511 transitions, 4470 flow, removed 245 selfloop flow, removed 10 redundant places. [2024-11-19 14:09:09,898 INFO L231 Difference]: Finished difference. Result has 202 places, 236 transitions, 2816 flow [2024-11-19 14:09:09,899 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2050, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=2816, PETRI_PLACES=202, PETRI_TRANSITIONS=236} [2024-11-19 14:09:09,899 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 153 predicate places. [2024-11-19 14:09:09,899 INFO L471 AbstractCegarLoop]: Abstraction has has 202 places, 236 transitions, 2816 flow [2024-11-19 14:09:09,900 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 17.62857142857143) internal successors, (617), 35 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 14:09:09,900 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 14:09:09,900 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 14:09:09,912 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-19 14:09:10,100 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,SelfDestructingSolverStorable17 [2024-11-19 14:09:10,100 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2024-11-19 14:09:10,101 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 14:09:10,101 INFO L85 PathProgramCache]: Analyzing trace with hash 2125079227, now seen corresponding path program 4 times [2024-11-19 14:09:10,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 14:09:10,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831764077] [2024-11-19 14:09:10,101 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 14:09:10,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 14:09:10,147 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 14:09:10,147 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 14:09:10,730 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 14:09:10,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 14:09:10,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831764077] [2024-11-19 14:09:10,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831764077] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 14:09:10,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498834028] [2024-11-19 14:09:10,731 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 14:09:10,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 14:09:10,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 14:09:10,733 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 14:09:10,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-19 14:09:10,816 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 14:09:10,816 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 14:09:10,818 INFO L255 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-19 14:09:10,820 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 14:09:11,122 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-19 14:09:11,123 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2024-11-19 14:09:11,145 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 14:09:11,145 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 14:09:11,237 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-11-19 14:09:11,237 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2024-11-19 14:09:11,824 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 14:09:11,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498834028] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 14:09:11,824 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 14:09:11,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2024-11-19 14:09:11,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102528463] [2024-11-19 14:09:11,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 14:09:11,825 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-19 14:09:11,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 14:09:11,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-19 14:09:11,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1064, Unknown=0, NotChecked=0, Total=1190 [2024-11-19 14:09:11,985 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2024-11-19 14:09:11,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 236 transitions, 2816 flow. Second operand has 35 states, 35 states have (on average 17.62857142857143) internal successors, (617), 35 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 14:09:11,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 14:09:11,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2024-11-19 14:09:11,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 14:09:17,142 INFO L124 PetriNetUnfolderBase]: 13562/27311 cut-off events. [2024-11-19 14:09:17,142 INFO L125 PetriNetUnfolderBase]: For 138690/139466 co-relation queries the response was YES. [2024-11-19 14:09:17,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92270 conditions, 27311 events. 13562/27311 cut-off events. For 138690/139466 co-relation queries the response was YES. Maximal size of possible extension queue 597. Compared 241244 event pairs, 2795 based on Foata normal form. 744/27129 useless extension candidates. Maximal degree in co-relation 92208. Up to 5529 conditions per place. [2024-11-19 14:09:17,348 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 257 selfloop transitions, 141 changer transitions 48/457 dead transitions. [2024-11-19 14:09:17,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 457 transitions, 4609 flow [2024-11-19 14:09:17,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-19 14:09:17,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-11-19 14:09:17,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 680 transitions. [2024-11-19 14:09:17,350 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5139833711262283 [2024-11-19 14:09:17,350 INFO L175 Difference]: Start difference. First operand has 202 places, 236 transitions, 2816 flow. Second operand 27 states and 680 transitions. [2024-11-19 14:09:17,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 457 transitions, 4609 flow [2024-11-19 14:09:18,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 457 transitions, 4470 flow, removed 43 selfloop flow, removed 15 redundant places. [2024-11-19 14:09:18,642 INFO L231 Difference]: Finished difference. Result has 213 places, 247 transitions, 3132 flow [2024-11-19 14:09:18,643 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2588, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=3132, PETRI_PLACES=213, PETRI_TRANSITIONS=247} [2024-11-19 14:09:18,643 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 164 predicate places. [2024-11-19 14:09:18,643 INFO L471 AbstractCegarLoop]: Abstraction has has 213 places, 247 transitions, 3132 flow [2024-11-19 14:09:18,643 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 17.62857142857143) internal successors, (617), 35 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 14:09:18,643 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 14:09:18,644 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 14:09:18,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-19 14:09:18,844 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 14:09:18,844 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2024-11-19 14:09:18,845 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 14:09:18,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1846985536, now seen corresponding path program 3 times [2024-11-19 14:09:18,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 14:09:18,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577643214] [2024-11-19 14:09:18,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 14:09:18,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 14:09:18,869 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-19 14:09:18,873 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 14:09:19,092 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-19 14:09:19,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 14:09:19,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577643214] [2024-11-19 14:09:19,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577643214] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 14:09:19,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264312981] [2024-11-19 14:09:19,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 14:09:19,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 14:09:19,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 14:09:19,095 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 14:09:19,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-19 14:09:19,178 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-19 14:09:19,178 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 14:09:19,179 INFO L255 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-19 14:09:19,181 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 14:09:19,403 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-19 14:09:19,404 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 14:09:19,568 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 14:09:19,569 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 51 [2024-11-19 14:09:19,642 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-19 14:09:19,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264312981] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 14:09:19,643 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 14:09:19,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2024-11-19 14:09:19,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577873993] [2024-11-19 14:09:19,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 14:09:19,644 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-19 14:09:19,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 14:09:19,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-19 14:09:19,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2024-11-19 14:09:19,702 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-11-19 14:09:19,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 247 transitions, 3132 flow. Second operand has 20 states, 20 states have (on average 20.55) internal successors, (411), 20 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 14:09:19,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 14:09:19,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-11-19 14:09:19,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 14:09:25,050 INFO L124 PetriNetUnfolderBase]: 16910/33763 cut-off events. [2024-11-19 14:09:25,050 INFO L125 PetriNetUnfolderBase]: For 196901/197669 co-relation queries the response was YES. [2024-11-19 14:09:25,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118216 conditions, 33763 events. 16910/33763 cut-off events. For 196901/197669 co-relation queries the response was YES. Maximal size of possible extension queue 813. Compared 308952 event pairs, 2142 based on Foata normal form. 1258/33713 useless extension candidates. Maximal degree in co-relation 118152. Up to 17364 conditions per place. [2024-11-19 14:09:25,471 INFO L140 encePairwiseOnDemand]: 43/49 looper letters, 378 selfloop transitions, 93 changer transitions 20/502 dead transitions. [2024-11-19 14:09:25,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 502 transitions, 5661 flow [2024-11-19 14:09:25,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-19 14:09:25,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-19 14:09:25,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 588 transitions. [2024-11-19 14:09:25,473 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-11-19 14:09:25,474 INFO L175 Difference]: Start difference. First operand has 213 places, 247 transitions, 3132 flow. Second operand 20 states and 588 transitions. [2024-11-19 14:09:25,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 502 transitions, 5661 flow [2024-11-19 14:09:27,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 502 transitions, 5528 flow, removed 26 selfloop flow, removed 21 redundant places. [2024-11-19 14:09:27,398 INFO L231 Difference]: Finished difference. Result has 218 places, 297 transitions, 3985 flow [2024-11-19 14:09:27,398 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3000, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=3985, PETRI_PLACES=218, PETRI_TRANSITIONS=297} [2024-11-19 14:09:27,399 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 169 predicate places. [2024-11-19 14:09:27,399 INFO L471 AbstractCegarLoop]: Abstraction has has 218 places, 297 transitions, 3985 flow [2024-11-19 14:09:27,399 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 20.55) internal successors, (411), 20 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 14:09:27,399 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 14:09:27,399 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 14:09:27,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-19 14:09:27,600 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,SelfDestructingSolverStorable19 [2024-11-19 14:09:27,600 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2024-11-19 14:09:27,600 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 14:09:27,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1092392767, now seen corresponding path program 5 times [2024-11-19 14:09:27,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 14:09:27,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892485557] [2024-11-19 14:09:27,601 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 14:09:27,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 14:09:27,630 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-19 14:09:27,630 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 14:09:28,535 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 14:09:28,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 14:09:28,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892485557] [2024-11-19 14:09:28,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892485557] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 14:09:28,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417802848] [2024-11-19 14:09:28,537 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 14:09:28,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 14:09:28,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 14:09:28,539 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 14:09:28,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-19 14:09:28,721 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-19 14:09:28,722 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 14:09:28,723 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-19 14:09:28,725 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 14:09:29,115 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 14:09:29,116 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 14:09:29,294 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 14:09:29,294 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 52 [2024-11-19 14:09:29,377 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-19 14:09:29,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417802848] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 14:09:29,377 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 14:09:29,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 6] total 29 [2024-11-19 14:09:29,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183749229] [2024-11-19 14:09:29,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 14:09:29,378 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-19 14:09:29,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 14:09:29,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-19 14:09:29,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=831, Unknown=0, NotChecked=0, Total=930 [2024-11-19 14:09:29,544 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2024-11-19 14:09:29,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 297 transitions, 3985 flow. Second operand has 31 states, 31 states have (on average 17.903225806451612) internal successors, (555), 31 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 14:09:29,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 14:09:29,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2024-11-19 14:09:29,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 14:09:35,692 INFO L124 PetriNetUnfolderBase]: 17892/35506 cut-off events. [2024-11-19 14:09:35,692 INFO L125 PetriNetUnfolderBase]: For 236895/237962 co-relation queries the response was YES. [2024-11-19 14:09:36,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131329 conditions, 35506 events. 17892/35506 cut-off events. For 236895/237962 co-relation queries the response was YES. Maximal size of possible extension queue 863. Compared 325463 event pairs, 2343 based on Foata normal form. 843/35325 useless extension candidates. Maximal degree in co-relation 131261. Up to 16666 conditions per place. [2024-11-19 14:09:36,387 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 432 selfloop transitions, 95 changer transitions 36/574 dead transitions. [2024-11-19 14:09:36,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 574 transitions, 6715 flow [2024-11-19 14:09:36,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-19 14:09:36,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-11-19 14:09:36,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 786 transitions. [2024-11-19 14:09:36,390 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5174456879526004 [2024-11-19 14:09:36,390 INFO L175 Difference]: Start difference. First operand has 218 places, 297 transitions, 3985 flow. Second operand 31 states and 786 transitions. [2024-11-19 14:09:36,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 574 transitions, 6715 flow [2024-11-19 14:09:39,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 574 transitions, 6453 flow, removed 105 selfloop flow, removed 6 redundant places. [2024-11-19 14:09:39,849 INFO L231 Difference]: Finished difference. Result has 247 places, 316 transitions, 4323 flow [2024-11-19 14:09:39,850 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3776, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=4323, PETRI_PLACES=247, PETRI_TRANSITIONS=316} [2024-11-19 14:09:39,850 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 198 predicate places. [2024-11-19 14:09:39,850 INFO L471 AbstractCegarLoop]: Abstraction has has 247 places, 316 transitions, 4323 flow [2024-11-19 14:09:39,851 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 17.903225806451612) internal successors, (555), 31 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 14:09:39,851 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 14:09:39,851 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 14:09:39,863 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-19 14:09:40,051 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 14:09:40,051 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2024-11-19 14:09:40,052 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 14:09:40,052 INFO L85 PathProgramCache]: Analyzing trace with hash -2123132480, now seen corresponding path program 6 times [2024-11-19 14:09:40,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 14:09:40,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584047693] [2024-11-19 14:09:40,052 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-19 14:09:40,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 14:09:40,082 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-11-19 14:09:40,082 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 14:09:40,170 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-19 14:09:40,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 14:09:40,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584047693] [2024-11-19 14:09:40,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584047693] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 14:09:40,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494824047] [2024-11-19 14:09:40,171 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-19 14:09:40,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 14:09:40,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 14:09:40,173 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 14:09:40,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-19 14:09:40,277 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-11-19 14:09:40,278 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 14:09:40,279 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-19 14:09:40,281 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 14:09:40,335 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-19 14:09:40,335 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 14:09:40,505 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-19 14:09:40,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494824047] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 14:09:40,506 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 14:09:40,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 6] total 9 [2024-11-19 14:09:40,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822343818] [2024-11-19 14:09:40,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 14:09:40,507 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-19 14:09:40,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 14:09:40,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-19 14:09:40,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2024-11-19 14:09:40,508 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-11-19 14:09:40,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 316 transitions, 4323 flow. Second operand has 10 states, 10 states have (on average 21.7) internal successors, (217), 10 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 14:09:40,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 14:09:40,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-11-19 14:09:40,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand