./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/chl-chromosome-subst.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73b7983-5538-4ce2-bb58-fdee04684b5c/bin/uautomizer-verify-qhAvR1uOyd/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73b7983-5538-4ce2-bb58-fdee04684b5c/bin/uautomizer-verify-qhAvR1uOyd/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73b7983-5538-4ce2-bb58-fdee04684b5c/bin/uautomizer-verify-qhAvR1uOyd/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73b7983-5538-4ce2-bb58-fdee04684b5c/bin/uautomizer-verify-qhAvR1uOyd/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/chl-chromosome-subst.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73b7983-5538-4ce2-bb58-fdee04684b5c/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73b7983-5538-4ce2-bb58-fdee04684b5c/bin/uautomizer-verify-qhAvR1uOyd --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 60539e5483ee028af31550fcc6bdc40a30b35263f2407e34b5392a698998aa9c --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-13 15:06:05,162 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-13 15:06:05,265 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73b7983-5538-4ce2-bb58-fdee04684b5c/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-Overflow-32bit-Automizer_Default.epf [2024-11-13 15:06:05,277 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-13 15:06:05,278 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-13 15:06:05,325 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-13 15:06:05,327 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-13 15:06:05,327 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-13 15:06:05,328 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-13 15:06:05,328 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-13 15:06:05,329 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-13 15:06:05,330 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-13 15:06:05,330 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-13 15:06:05,331 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-13 15:06:05,331 INFO L153 SettingsManager]: * Use SBE=true [2024-11-13 15:06:05,331 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-13 15:06:05,331 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-13 15:06:05,331 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-13 15:06:05,332 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-13 15:06:05,332 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-13 15:06:05,332 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-13 15:06:05,332 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-13 15:06:05,333 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-13 15:06:05,333 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-13 15:06:05,333 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-13 15:06:05,333 INFO L153 SettingsManager]: * Check absence of signed integer overflows=ASSERTandASSUME [2024-11-13 15:06:05,333 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-13 15:06:05,333 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-13 15:06:05,333 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-13 15:06:05,334 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-13 15:06:05,334 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-13 15:06:05,334 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-13 15:06:05,334 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-13 15:06:05,334 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-13 15:06:05,334 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 15:06:05,335 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-13 15:06:05,335 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-13 15:06:05,336 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-13 15:06:05,336 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-13 15:06:05,336 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-13 15:06:05,336 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-13 15:06:05,336 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-13 15:06:05,337 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-13 15:06:05,337 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-13 15:06:05,337 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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 -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73b7983-5538-4ce2-bb58-fdee04684b5c/bin/uautomizer-verify-qhAvR1uOyd 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 -> 60539e5483ee028af31550fcc6bdc40a30b35263f2407e34b5392a698998aa9c [2024-11-13 15:06:05,663 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-13 15:06:05,675 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-13 15:06:05,679 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-13 15:06:05,680 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-13 15:06:05,681 INFO L274 PluginConnector]: CDTParser initialized [2024-11-13 15:06:05,684 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73b7983-5538-4ce2-bb58-fdee04684b5c/bin/uautomizer-verify-qhAvR1uOyd/../../sv-benchmarks/c/weaver/chl-chromosome-subst.wvr.c Unable to find full path for "g++" [2024-11-13 15:06:07,572 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-13 15:06:07,897 INFO L384 CDTParser]: Found 1 translation units. [2024-11-13 15:06:07,898 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73b7983-5538-4ce2-bb58-fdee04684b5c/sv-benchmarks/c/weaver/chl-chromosome-subst.wvr.c [2024-11-13 15:06:07,916 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73b7983-5538-4ce2-bb58-fdee04684b5c/bin/uautomizer-verify-qhAvR1uOyd/data/bf074e941/26d4253f3fb7437a8b28e626ecb988bd/FLAGe631f889b [2024-11-13 15:06:07,934 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73b7983-5538-4ce2-bb58-fdee04684b5c/bin/uautomizer-verify-qhAvR1uOyd/data/bf074e941/26d4253f3fb7437a8b28e626ecb988bd [2024-11-13 15:06:07,938 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-13 15:06:07,939 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-13 15:06:07,941 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-13 15:06:07,942 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-13 15:06:07,948 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-13 15:06:07,949 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 03:06:07" (1/1) ... [2024-11-13 15:06:07,950 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e76f9ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:06:07, skipping insertion in model container [2024-11-13 15:06:07,950 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 03:06:07" (1/1) ... [2024-11-13 15:06:07,982 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 15:06:08,222 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 15:06:08,233 INFO L200 MainTranslator]: Completed pre-run [2024-11-13 15:06:08,280 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 15:06:08,302 INFO L204 MainTranslator]: Completed translation [2024-11-13 15:06:08,302 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:06:08 WrapperNode [2024-11-13 15:06:08,303 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-13 15:06:08,304 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-13 15:06:08,304 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-13 15:06:08,304 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-13 15:06:08,312 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:06:08" (1/1) ... [2024-11-13 15:06:08,322 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:06:08" (1/1) ... [2024-11-13 15:06:08,374 INFO L138 Inliner]: procedures = 25, calls = 33, calls flagged for inlining = 18, calls inlined = 26, statements flattened = 321 [2024-11-13 15:06:08,374 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-13 15:06:08,374 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-13 15:06:08,375 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-13 15:06:08,375 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-13 15:06:08,396 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:06:08" (1/1) ... [2024-11-13 15:06:08,396 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:06:08" (1/1) ... [2024-11-13 15:06:08,403 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:06:08" (1/1) ... [2024-11-13 15:06:08,443 INFO L175 MemorySlicer]: Split 11 memory accesses to 2 slices as follows [2, 9]. 82 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-11-13 15:06:08,446 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:06:08" (1/1) ... [2024-11-13 15:06:08,446 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:06:08" (1/1) ... [2024-11-13 15:06:08,468 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:06:08" (1/1) ... [2024-11-13 15:06:08,477 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:06:08" (1/1) ... [2024-11-13 15:06:08,483 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:06:08" (1/1) ... [2024-11-13 15:06:08,485 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:06:08" (1/1) ... [2024-11-13 15:06:08,492 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-13 15:06:08,493 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-13 15:06:08,493 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-13 15:06:08,494 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-13 15:06:08,495 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:06:08" (1/1) ... [2024-11-13 15:06:08,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 15:06:08,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73b7983-5538-4ce2-bb58-fdee04684b5c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:06:08,547 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73b7983-5538-4ce2-bb58-fdee04684b5c/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-13 15:06:08,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73b7983-5538-4ce2-bb58-fdee04684b5c/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-13 15:06:08,587 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-13 15:06:08,587 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-13 15:06:08,587 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-13 15:06:08,587 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-13 15:06:08,588 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-13 15:06:08,588 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-13 15:06:08,588 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-13 15:06:08,588 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-13 15:06:08,588 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-13 15:06:08,588 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-13 15:06:08,588 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-13 15:06:08,588 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-13 15:06:08,589 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-13 15:06:08,589 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-13 15:06:08,589 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-13 15:06:08,589 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-13 15:06:08,591 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-13 15:06:08,782 INFO L238 CfgBuilder]: Building ICFG [2024-11-13 15:06:08,786 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-13 15:06:09,727 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-13 15:06:09,727 INFO L287 CfgBuilder]: Performing block encoding [2024-11-13 15:06:10,272 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-13 15:06:10,274 INFO L316 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-13 15:06:10,274 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 03:06:10 BoogieIcfgContainer [2024-11-13 15:06:10,274 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-13 15:06:10,278 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-13 15:06:10,279 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-13 15:06:10,284 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-13 15:06:10,285 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 03:06:07" (1/3) ... [2024-11-13 15:06:10,286 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@376d1fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 03:06:10, skipping insertion in model container [2024-11-13 15:06:10,287 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:06:08" (2/3) ... [2024-11-13 15:06:10,287 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@376d1fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 03:06:10, skipping insertion in model container [2024-11-13 15:06:10,287 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 03:06:10" (3/3) ... [2024-11-13 15:06:10,288 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-chromosome-subst.wvr.c [2024-11-13 15:06:10,309 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-13 15:06:10,310 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG chl-chromosome-subst.wvr.c that has 4 procedures, 96 locations, 1 initial locations, 6 loop locations, and 30 error locations. [2024-11-13 15:06:10,311 INFO L492 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-13 15:06:10,442 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-13 15:06:10,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 107 transitions, 235 flow [2024-11-13 15:06:10,578 INFO L124 PetriNetUnfolderBase]: 12/104 cut-off events. [2024-11-13 15:06:10,581 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-13 15:06:10,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117 conditions, 104 events. 12/104 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 392 event pairs, 0 based on Foata normal form. 0/62 useless extension candidates. Maximal degree in co-relation 84. Up to 2 conditions per place. [2024-11-13 15:06:10,589 INFO L82 GeneralOperation]: Start removeDead. Operand has 105 places, 107 transitions, 235 flow [2024-11-13 15:06:10,598 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 100 places, 102 transitions, 219 flow [2024-11-13 15:06:10,607 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-13 15:06:10,622 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;@33d90f87, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-13 15:06:10,624 INFO L334 AbstractCegarLoop]: Starting to check reachability of 57 error locations. [2024-11-13 15:06:10,629 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-13 15:06:10,631 INFO L124 PetriNetUnfolderBase]: 0/3 cut-off events. [2024-11-13 15:06:10,631 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-13 15:06:10,631 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:06:10,632 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-13 15:06:10,632 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 54 more)] === [2024-11-13 15:06:10,637 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:06:10,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1005476, now seen corresponding path program 1 times [2024-11-13 15:06:10,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:06:10,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463246461] [2024-11-13 15:06:10,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:06:10,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:06:10,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:06:10,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:06:10,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:06:10,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463246461] [2024-11-13 15:06:10,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463246461] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:06:10,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:06:10,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 15:06:10,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632316812] [2024-11-13 15:06:10,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:06:10,945 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 15:06:10,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:06:10,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 15:06:10,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 15:06:11,007 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 107 [2024-11-13 15:06:11,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 102 transitions, 219 flow. Second operand has 4 states, 4 states have (on average 54.75) internal successors, (219), 4 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:06:11,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:06:11,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 107 [2024-11-13 15:06:11,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:06:12,844 INFO L124 PetriNetUnfolderBase]: 4133/8574 cut-off events. [2024-11-13 15:06:12,845 INFO L125 PetriNetUnfolderBase]: For 250/250 co-relation queries the response was YES. [2024-11-13 15:06:12,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14289 conditions, 8574 events. 4133/8574 cut-off events. For 250/250 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 75179 event pairs, 2732 based on Foata normal form. 3/6721 useless extension candidates. Maximal degree in co-relation 13590. Up to 5489 conditions per place. [2024-11-13 15:06:12,951 INFO L140 encePairwiseOnDemand]: 91/107 looper letters, 50 selfloop transitions, 10 changer transitions 0/111 dead transitions. [2024-11-13 15:06:12,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 111 transitions, 357 flow [2024-11-13 15:06:12,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 15:06:12,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-13 15:06:12,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 282 transitions. [2024-11-13 15:06:12,972 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6588785046728972 [2024-11-13 15:06:12,975 INFO L175 Difference]: Start difference. First operand has 100 places, 102 transitions, 219 flow. Second operand 4 states and 282 transitions. [2024-11-13 15:06:12,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 111 transitions, 357 flow [2024-11-13 15:06:12,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 111 transitions, 348 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-13 15:06:12,995 INFO L231 Difference]: Finished difference. Result has 101 places, 111 transitions, 298 flow [2024-11-13 15:06:12,998 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=298, PETRI_PLACES=101, PETRI_TRANSITIONS=111} [2024-11-13 15:06:13,003 INFO L277 CegarLoopForPetriNet]: 100 programPoint places, 1 predicate places. [2024-11-13 15:06:13,005 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 111 transitions, 298 flow [2024-11-13 15:06:13,006 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 54.75) internal successors, (219), 4 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:06:13,006 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:06:13,006 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-11-13 15:06:13,007 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-13 15:06:13,007 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 54 more)] === [2024-11-13 15:06:13,007 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:06:13,007 INFO L85 PathProgramCache]: Analyzing trace with hash -109626236, now seen corresponding path program 1 times [2024-11-13 15:06:13,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:06:13,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593647788] [2024-11-13 15:06:13,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:06:13,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:06:13,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:06:13,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:06:13,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:06:13,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593647788] [2024-11-13 15:06:13,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593647788] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:06:13,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558650955] [2024-11-13 15:06:13,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:06:13,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:06:13,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73b7983-5538-4ce2-bb58-fdee04684b5c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:06:13,273 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73b7983-5538-4ce2-bb58-fdee04684b5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:06:13,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73b7983-5538-4ce2-bb58-fdee04684b5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-13 15:06:13,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:06:13,382 INFO L255 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-13 15:06:13,386 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:06:13,443 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:06:13,444 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 15:06:13,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558650955] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:06:13,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 15:06:13,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2024-11-13 15:06:13,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474904597] [2024-11-13 15:06:13,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:06:13,446 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 15:06:13,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:06:13,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 15:06:13,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-13 15:06:13,490 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 107 [2024-11-13 15:06:13,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 111 transitions, 298 flow. Second operand has 6 states, 6 states have (on average 54.833333333333336) internal successors, (329), 6 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:06:13,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:06:13,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 107 [2024-11-13 15:06:13,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:06:14,993 INFO L124 PetriNetUnfolderBase]: 4133/8571 cut-off events. [2024-11-13 15:06:14,994 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2024-11-13 15:06:15,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14235 conditions, 8571 events. 4133/8571 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 75168 event pairs, 2732 based on Foata normal form. 3/6723 useless extension candidates. Maximal degree in co-relation 14162. Up to 5474 conditions per place. [2024-11-13 15:06:15,076 INFO L140 encePairwiseOnDemand]: 94/107 looper letters, 40 selfloop transitions, 17 changer transitions 0/108 dead transitions. [2024-11-13 15:06:15,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 108 transitions, 400 flow [2024-11-13 15:06:15,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 15:06:15,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-13 15:06:15,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 384 transitions. [2024-11-13 15:06:15,078 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5981308411214953 [2024-11-13 15:06:15,078 INFO L175 Difference]: Start difference. First operand has 101 places, 111 transitions, 298 flow. Second operand 6 states and 384 transitions. [2024-11-13 15:06:15,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 108 transitions, 400 flow [2024-11-13 15:06:15,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 108 transitions, 400 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-13 15:06:15,085 INFO L231 Difference]: Finished difference. Result has 103 places, 108 transitions, 320 flow [2024-11-13 15:06:15,087 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=320, PETRI_PLACES=103, PETRI_TRANSITIONS=108} [2024-11-13 15:06:15,088 INFO L277 CegarLoopForPetriNet]: 100 programPoint places, 3 predicate places. [2024-11-13 15:06:15,089 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 108 transitions, 320 flow [2024-11-13 15:06:15,089 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 54.833333333333336) internal successors, (329), 6 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:06:15,089 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:06:15,090 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2024-11-13 15:06:15,110 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73b7983-5538-4ce2-bb58-fdee04684b5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-13 15:06:15,290 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73b7983-5538-4ce2-bb58-fdee04684b5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:06:15,291 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 54 more)] === [2024-11-13 15:06:15,292 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:06:15,292 INFO L85 PathProgramCache]: Analyzing trace with hash 896554996, now seen corresponding path program 1 times [2024-11-13 15:06:15,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:06:15,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650783368] [2024-11-13 15:06:15,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:06:15,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:06:15,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:06:15,473 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:06:15,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:06:15,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650783368] [2024-11-13 15:06:15,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650783368] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:06:15,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806164883] [2024-11-13 15:06:15,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:06:15,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:06:15,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73b7983-5538-4ce2-bb58-fdee04684b5c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:06:15,477 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73b7983-5538-4ce2-bb58-fdee04684b5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:06:15,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73b7983-5538-4ce2-bb58-fdee04684b5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-13 15:06:15,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:06:15,580 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-13 15:06:15,581 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:06:15,618 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:06:15,618 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:06:15,676 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:06:15,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806164883] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:06:15,679 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:06:15,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2024-11-13 15:06:15,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133626973] [2024-11-13 15:06:15,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:06:15,680 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-13 15:06:15,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:06:15,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-13 15:06:15,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-11-13 15:06:15,735 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 107 [2024-11-13 15:06:15,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 108 transitions, 320 flow. Second operand has 12 states, 12 states have (on average 55.083333333333336) internal successors, (661), 12 states have internal predecessors, (661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:06:15,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:06:15,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 107 [2024-11-13 15:06:15,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:06:17,162 INFO L124 PetriNetUnfolderBase]: 4142/8607 cut-off events. [2024-11-13 15:06:17,163 INFO L125 PetriNetUnfolderBase]: For 137/137 co-relation queries the response was YES. [2024-11-13 15:06:17,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14376 conditions, 8607 events. 4142/8607 cut-off events. For 137/137 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 75600 event pairs, 2732 based on Foata normal form. 9/6765 useless extension candidates. Maximal degree in co-relation 14164. Up to 5489 conditions per place. [2024-11-13 15:06:17,224 INFO L140 encePairwiseOnDemand]: 94/107 looper letters, 47 selfloop transitions, 37 changer transitions 0/135 dead transitions. [2024-11-13 15:06:17,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 135 transitions, 662 flow [2024-11-13 15:06:17,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-13 15:06:17,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-13 15:06:17,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 633 transitions. [2024-11-13 15:06:17,230 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.591588785046729 [2024-11-13 15:06:17,231 INFO L175 Difference]: Start difference. First operand has 103 places, 108 transitions, 320 flow. Second operand 10 states and 633 transitions. [2024-11-13 15:06:17,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 135 transitions, 662 flow [2024-11-13 15:06:17,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 135 transitions, 579 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-11-13 15:06:17,240 INFO L231 Difference]: Finished difference. Result has 110 places, 135 transitions, 535 flow [2024-11-13 15:06:17,240 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=535, PETRI_PLACES=110, PETRI_TRANSITIONS=135} [2024-11-13 15:06:17,241 INFO L277 CegarLoopForPetriNet]: 100 programPoint places, 10 predicate places. [2024-11-13 15:06:17,242 INFO L471 AbstractCegarLoop]: Abstraction has has 110 places, 135 transitions, 535 flow [2024-11-13 15:06:17,242 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 55.083333333333336) internal successors, (661), 12 states have internal predecessors, (661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:06:17,242 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:06:17,242 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:06:17,265 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73b7983-5538-4ce2-bb58-fdee04684b5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-13 15:06:17,443 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73b7983-5538-4ce2-bb58-fdee04684b5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:06:17,443 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 54 more)] === [2024-11-13 15:06:17,443 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:06:17,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1394357577, now seen corresponding path program 1 times [2024-11-13 15:06:17,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:06:17,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659111918] [2024-11-13 15:06:17,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:06:17,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:06:17,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:06:17,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:06:17,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:06:17,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659111918] [2024-11-13 15:06:17,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659111918] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:06:17,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:06:17,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 15:06:17,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049898641] [2024-11-13 15:06:17,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:06:17,643 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 15:06:17,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:06:17,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 15:06:17,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 15:06:17,644 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 107 [2024-11-13 15:06:17,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 135 transitions, 535 flow. Second operand has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:06:17,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:06:17,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 107 [2024-11-13 15:06:17,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:06:18,965 INFO L124 PetriNetUnfolderBase]: 4139/8604 cut-off events. [2024-11-13 15:06:18,965 INFO L125 PetriNetUnfolderBase]: For 166/166 co-relation queries the response was YES. [2024-11-13 15:06:18,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14386 conditions, 8604 events. 4139/8604 cut-off events. For 166/166 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 75299 event pairs, 2732 based on Foata normal form. 3/6757 useless extension candidates. Maximal degree in co-relation 14288. Up to 5503 conditions per place. [2024-11-13 15:06:19,038 INFO L140 encePairwiseOnDemand]: 100/107 looper letters, 66 selfloop transitions, 12 changer transitions 0/132 dead transitions. [2024-11-13 15:06:19,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 132 transitions, 677 flow [2024-11-13 15:06:19,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 15:06:19,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-13 15:06:19,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 234 transitions. [2024-11-13 15:06:19,039 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7289719626168224 [2024-11-13 15:06:19,040 INFO L175 Difference]: Start difference. First operand has 110 places, 135 transitions, 535 flow. Second operand 3 states and 234 transitions. [2024-11-13 15:06:19,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 132 transitions, 677 flow [2024-11-13 15:06:19,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 132 transitions, 629 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-11-13 15:06:19,048 INFO L231 Difference]: Finished difference. Result has 109 places, 132 transitions, 497 flow [2024-11-13 15:06:19,048 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=473, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=497, PETRI_PLACES=109, PETRI_TRANSITIONS=132} [2024-11-13 15:06:19,049 INFO L277 CegarLoopForPetriNet]: 100 programPoint places, 9 predicate places. [2024-11-13 15:06:19,049 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 132 transitions, 497 flow [2024-11-13 15:06:19,049 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:06:19,050 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:06:19,050 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 1, 1] [2024-11-13 15:06:19,050 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-13 15:06:19,053 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 54 more)] === [2024-11-13 15:06:19,053 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:06:19,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1102513964, now seen corresponding path program 2 times [2024-11-13 15:06:19,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:06:19,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667256781] [2024-11-13 15:06:19,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:06:19,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:06:19,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:06:19,356 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:06:19,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:06:19,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667256781] [2024-11-13 15:06:19,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667256781] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:06:19,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781987298] [2024-11-13 15:06:19,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 15:06:19,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:06:19,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73b7983-5538-4ce2-bb58-fdee04684b5c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:06:19,360 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73b7983-5538-4ce2-bb58-fdee04684b5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:06:19,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73b7983-5538-4ce2-bb58-fdee04684b5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-13 15:06:19,473 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-13 15:06:19,474 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:06:19,475 INFO L255 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-13 15:06:19,476 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:06:19,530 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-13 15:06:19,530 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:06:19,599 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-13 15:06:19,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781987298] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:06:19,600 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:06:19,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 2, 2] total 13 [2024-11-13 15:06:19,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089144294] [2024-11-13 15:06:19,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:06:19,600 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-13 15:06:19,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:06:19,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-13 15:06:19,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2024-11-13 15:06:19,699 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 107 [2024-11-13 15:06:19,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 132 transitions, 497 flow. Second operand has 15 states, 15 states have (on average 55.333333333333336) internal successors, (830), 15 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:06:19,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:06:19,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 107 [2024-11-13 15:06:19,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:06:21,064 INFO L124 PetriNetUnfolderBase]: 4142/8607 cut-off events. [2024-11-13 15:06:21,065 INFO L125 PetriNetUnfolderBase]: For 142/142 co-relation queries the response was YES. [2024-11-13 15:06:21,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14377 conditions, 8607 events. 4142/8607 cut-off events. For 142/142 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 75247 event pairs, 2732 based on Foata normal form. 3/6761 useless extension candidates. Maximal degree in co-relation 14275. Up to 5477 conditions per place. [2024-11-13 15:06:21,130 INFO L140 encePairwiseOnDemand]: 94/107 looper letters, 35 selfloop transitions, 49 changer transitions 0/135 dead transitions. [2024-11-13 15:06:21,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 135 transitions, 672 flow [2024-11-13 15:06:21,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-13 15:06:21,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-13 15:06:21,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 789 transitions. [2024-11-13 15:06:21,135 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5672178289000719 [2024-11-13 15:06:21,135 INFO L175 Difference]: Start difference. First operand has 109 places, 132 transitions, 497 flow. Second operand 13 states and 789 transitions. [2024-11-13 15:06:21,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 135 transitions, 672 flow [2024-11-13 15:06:21,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 135 transitions, 614 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-11-13 15:06:21,140 INFO L231 Difference]: Finished difference. Result has 112 places, 135 transitions, 544 flow [2024-11-13 15:06:21,141 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=413, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=544, PETRI_PLACES=112, PETRI_TRANSITIONS=135} [2024-11-13 15:06:21,141 INFO L277 CegarLoopForPetriNet]: 100 programPoint places, 12 predicate places. [2024-11-13 15:06:21,141 INFO L471 AbstractCegarLoop]: Abstraction has has 112 places, 135 transitions, 544 flow [2024-11-13 15:06:21,142 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 55.333333333333336) internal successors, (830), 15 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:06:21,142 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:06:21,142 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:06:21,164 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73b7983-5538-4ce2-bb58-fdee04684b5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-13 15:06:21,343 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73b7983-5538-4ce2-bb58-fdee04684b5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:06:21,343 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 54 more)] === [2024-11-13 15:06:21,343 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:06:21,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1265300263, now seen corresponding path program 1 times [2024-11-13 15:06:21,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:06:21,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257413924] [2024-11-13 15:06:21,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:06:21,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:06:21,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:06:21,508 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 15:06:21,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:06:21,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257413924] [2024-11-13 15:06:21,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257413924] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:06:21,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:06:21,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 15:06:21,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564981254] [2024-11-13 15:06:21,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:06:21,509 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 15:06:21,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:06:21,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 15:06:21,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-13 15:06:21,541 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 107 [2024-11-13 15:06:21,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 135 transitions, 544 flow. Second operand has 4 states, 4 states have (on average 57.75) internal successors, (231), 4 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:06:21,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:06:21,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 107 [2024-11-13 15:06:21,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:06:23,068 INFO L124 PetriNetUnfolderBase]: 8073/14480 cut-off events. [2024-11-13 15:06:23,068 INFO L125 PetriNetUnfolderBase]: For 139/139 co-relation queries the response was YES. [2024-11-13 15:06:23,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25654 conditions, 14480 events. 8073/14480 cut-off events. For 139/139 co-relation queries the response was YES. Maximal size of possible extension queue 828. Compared 120608 event pairs, 2641 based on Foata normal form. 364/12041 useless extension candidates. Maximal degree in co-relation 25409. Up to 5065 conditions per place. [2024-11-13 15:06:23,150 INFO L140 encePairwiseOnDemand]: 99/107 looper letters, 134 selfloop transitions, 5 changer transitions 0/184 dead transitions. [2024-11-13 15:06:23,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 184 transitions, 926 flow [2024-11-13 15:06:23,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 15:06:23,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-13 15:06:23,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 319 transitions. [2024-11-13 15:06:23,152 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7453271028037384 [2024-11-13 15:06:23,152 INFO L175 Difference]: Start difference. First operand has 112 places, 135 transitions, 544 flow. Second operand 4 states and 319 transitions. [2024-11-13 15:06:23,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 184 transitions, 926 flow [2024-11-13 15:06:23,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 184 transitions, 750 flow, removed 11 selfloop flow, removed 12 redundant places. [2024-11-13 15:06:23,157 INFO L231 Difference]: Finished difference. Result has 105 places, 137 transitions, 402 flow [2024-11-13 15:06:23,158 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=402, PETRI_PLACES=105, PETRI_TRANSITIONS=137} [2024-11-13 15:06:23,159 INFO L277 CegarLoopForPetriNet]: 100 programPoint places, 5 predicate places. [2024-11-13 15:06:23,159 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 137 transitions, 402 flow [2024-11-13 15:06:23,159 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 57.75) internal successors, (231), 4 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:06:23,159 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:06:23,159 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:06:23,159 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-13 15:06:23,159 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 54 more)] === [2024-11-13 15:06:23,160 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:06:23,160 INFO L85 PathProgramCache]: Analyzing trace with hash -569601395, now seen corresponding path program 1 times [2024-11-13 15:06:23,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:06:23,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439324065] [2024-11-13 15:06:23,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:06:23,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:06:23,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:06:23,398 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 15:06:23,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:06:23,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439324065] [2024-11-13 15:06:23,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439324065] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:06:23,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667775789] [2024-11-13 15:06:23,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:06:23,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:06:23,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73b7983-5538-4ce2-bb58-fdee04684b5c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:06:23,402 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73b7983-5538-4ce2-bb58-fdee04684b5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:06:23,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73b7983-5538-4ce2-bb58-fdee04684b5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-13 15:06:23,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:06:23,551 INFO L255 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-13 15:06:23,552 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:06:23,621 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 15:06:23,621 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:06:23,681 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 15:06:23,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667775789] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:06:23,681 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:06:23,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2024-11-13 15:06:23,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100336262] [2024-11-13 15:06:23,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:06:23,682 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-13 15:06:23,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:06:23,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-13 15:06:23,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-11-13 15:06:23,750 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 107 [2024-11-13 15:06:23,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 137 transitions, 402 flow. Second operand has 11 states, 11 states have (on average 55.90909090909091) internal successors, (615), 11 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:06:23,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:06:23,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 107 [2024-11-13 15:06:23,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:06:25,159 INFO L124 PetriNetUnfolderBase]: 5181/10987 cut-off events. [2024-11-13 15:06:25,159 INFO L125 PetriNetUnfolderBase]: For 1875/2141 co-relation queries the response was YES. [2024-11-13 15:06:25,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19627 conditions, 10987 events. 5181/10987 cut-off events. For 1875/2141 co-relation queries the response was YES. Maximal size of possible extension queue 642. Compared 101567 event pairs, 3504 based on Foata normal form. 135/8932 useless extension candidates. Maximal degree in co-relation 9677. Up to 6893 conditions per place. [2024-11-13 15:06:25,235 INFO L140 encePairwiseOnDemand]: 97/107 looper letters, 43 selfloop transitions, 37 changer transitions 0/131 dead transitions. [2024-11-13 15:06:25,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 131 transitions, 540 flow [2024-11-13 15:06:25,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-13 15:06:25,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-13 15:06:25,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 444 transitions. [2024-11-13 15:06:25,237 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5927903871829105 [2024-11-13 15:06:25,237 INFO L175 Difference]: Start difference. First operand has 105 places, 137 transitions, 402 flow. Second operand 7 states and 444 transitions. [2024-11-13 15:06:25,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 131 transitions, 540 flow [2024-11-13 15:06:25,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 131 transitions, 540 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-13 15:06:25,282 INFO L231 Difference]: Finished difference. Result has 111 places, 131 transitions, 454 flow [2024-11-13 15:06:25,283 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=380, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=454, PETRI_PLACES=111, PETRI_TRANSITIONS=131} [2024-11-13 15:06:25,286 INFO L277 CegarLoopForPetriNet]: 100 programPoint places, 11 predicate places. [2024-11-13 15:06:25,287 INFO L471 AbstractCegarLoop]: Abstraction has has 111 places, 131 transitions, 454 flow [2024-11-13 15:06:25,288 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 55.90909090909091) internal successors, (615), 11 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:06:25,288 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:06:25,288 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:06:25,315 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73b7983-5538-4ce2-bb58-fdee04684b5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-13 15:06:25,489 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73b7983-5538-4ce2-bb58-fdee04684b5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:06:25,489 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 54 more)] === [2024-11-13 15:06:25,489 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:06:25,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1123962637, now seen corresponding path program 2 times [2024-11-13 15:06:25,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:06:25,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964567636] [2024-11-13 15:06:25,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:06:25,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:06:25,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:06:25,926 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-13 15:06:25,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:06:25,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964567636] [2024-11-13 15:06:25,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964567636] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:06:25,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257739718] [2024-11-13 15:06:25,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 15:06:25,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:06:25,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73b7983-5538-4ce2-bb58-fdee04684b5c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:06:25,929 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73b7983-5538-4ce2-bb58-fdee04684b5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:06:25,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73b7983-5538-4ce2-bb58-fdee04684b5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-13 15:06:26,095 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 15:06:26,095 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:06:26,097 INFO L255 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-13 15:06:26,099 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:06:26,305 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-13 15:06:26,305 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:06:26,496 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-13 15:06:26,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257739718] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:06:26,497 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:06:26,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2024-11-13 15:06:26,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320794328] [2024-11-13 15:06:26,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:06:26,497 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-13 15:06:26,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:06:26,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-13 15:06:26,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2024-11-13 15:06:26,591 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 107 [2024-11-13 15:06:26,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 131 transitions, 454 flow. Second operand has 23 states, 23 states have (on average 55.43478260869565) internal successors, (1275), 23 states have internal predecessors, (1275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:06:26,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:06:26,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 107 [2024-11-13 15:06:26,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:06:27,948 INFO L124 PetriNetUnfolderBase]: 5175/10981 cut-off events. [2024-11-13 15:06:27,948 INFO L125 PetriNetUnfolderBase]: For 1905/2171 co-relation queries the response was YES. [2024-11-13 15:06:27,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19645 conditions, 10981 events. 5175/10981 cut-off events. For 1905/2171 co-relation queries the response was YES. Maximal size of possible extension queue 642. Compared 101592 event pairs, 3504 based on Foata normal form. 137/8935 useless extension candidates. Maximal degree in co-relation 19483. Up to 6885 conditions per place. [2024-11-13 15:06:27,985 INFO L140 encePairwiseOnDemand]: 97/107 looper letters, 41 selfloop transitions, 33 changer transitions 0/125 dead transitions. [2024-11-13 15:06:27,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 125 transitions, 572 flow [2024-11-13 15:06:27,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-13 15:06:27,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-13 15:06:27,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 672 transitions. [2024-11-13 15:06:27,988 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5709430756159728 [2024-11-13 15:06:27,989 INFO L175 Difference]: Start difference. First operand has 111 places, 131 transitions, 454 flow. Second operand 11 states and 672 transitions. [2024-11-13 15:06:27,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 125 transitions, 572 flow [2024-11-13 15:06:28,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 125 transitions, 506 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-13 15:06:28,017 INFO L231 Difference]: Finished difference. Result has 115 places, 125 transitions, 424 flow [2024-11-13 15:06:28,017 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=358, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=424, PETRI_PLACES=115, PETRI_TRANSITIONS=125} [2024-11-13 15:06:28,021 INFO L277 CegarLoopForPetriNet]: 100 programPoint places, 15 predicate places. [2024-11-13 15:06:28,021 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 125 transitions, 424 flow [2024-11-13 15:06:28,022 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 55.43478260869565) internal successors, (1275), 23 states have internal predecessors, (1275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:06:28,023 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:06:28,023 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:06:28,044 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73b7983-5538-4ce2-bb58-fdee04684b5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-13 15:06:28,224 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73b7983-5538-4ce2-bb58-fdee04684b5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:06:28,224 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 54 more)] === [2024-11-13 15:06:28,224 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:06:28,224 INFO L85 PathProgramCache]: Analyzing trace with hash 615500685, now seen corresponding path program 3 times [2024-11-13 15:06:28,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:06:28,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044339549] [2024-11-13 15:06:28,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:06:28,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:06:28,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:06:30,999 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-11-13 15:06:30,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:06:31,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044339549] [2024-11-13 15:06:31,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044339549] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:06:31,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101807399] [2024-11-13 15:06:31,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 15:06:31,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:06:31,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73b7983-5538-4ce2-bb58-fdee04684b5c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:06:31,003 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73b7983-5538-4ce2-bb58-fdee04684b5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:06:31,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73b7983-5538-4ce2-bb58-fdee04684b5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-13 15:06:31,320 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-13 15:06:31,320 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:06:31,324 INFO L255 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-13 15:06:31,331 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:06:31,364 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-13 15:06:31,429 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 15:06:31,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:06:31,543 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-11-13 15:06:31,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:06:31,668 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-11-13 15:06:31,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:06:31,794 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-11-13 15:06:31,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:06:31,923 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-11-13 15:06:31,997 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-13 15:06:31,997 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-13 15:06:32,012 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-13 15:06:32,055 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-13 15:06:32,088 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-13 15:06:32,117 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-13 15:06:32,150 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-13 15:06:32,198 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 [2024-11-13 15:06:32,254 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-11-13 15:06:32,254 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:06:32,385 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_228 (Array Int Int))) (< (select (select (store |c_#memory_int#1| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| v_ArrVal_228) c_~o_2~0.base) c_~o_2~0.offset) 9223372039002259456)) is different from false [2024-11-13 15:08:02,245 INFO L349 Elim1Store]: treesize reduction 244, result has 20.0 percent of original size [2024-11-13 15:08:02,246 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 1 new quantified variables, introduced 5 case distinctions, treesize of input 50 treesize of output 71 [2024-11-13 15:08:02,265 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:08:02,266 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 33 treesize of output 29 [2024-11-13 15:08:02,273 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 9 treesize of output 7 [2024-11-13 15:08:02,397 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 57 trivial. 13 not checked. [2024-11-13 15:08:02,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101807399] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:08:02,401 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:08:02,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2024-11-13 15:08:02,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133577797] [2024-11-13 15:08:02,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:08:02,401 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-11-13 15:08:02,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:08:02,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-11-13 15:08:02,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1328, Unknown=21, NotChecked=76, Total=1640 [2024-11-13 15:08:02,439 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 107 [2024-11-13 15:08:02,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 125 transitions, 424 flow. Second operand has 41 states, 41 states have (on average 43.951219512195124) internal successors, (1802), 41 states have internal predecessors, (1802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:08:02,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:08:02,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 107 [2024-11-13 15:08:02,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:08:09,705 INFO L124 PetriNetUnfolderBase]: 25894/39100 cut-off events. [2024-11-13 15:08:09,705 INFO L125 PetriNetUnfolderBase]: For 3316/3361 co-relation queries the response was YES. [2024-11-13 15:08:09,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80275 conditions, 39100 events. 25894/39100 cut-off events. For 3316/3361 co-relation queries the response was YES. Maximal size of possible extension queue 1335. Compared 287658 event pairs, 5505 based on Foata normal form. 45/34551 useless extension candidates. Maximal degree in co-relation 80098. Up to 12356 conditions per place. [2024-11-13 15:08:09,895 INFO L140 encePairwiseOnDemand]: 89/107 looper letters, 173 selfloop transitions, 47 changer transitions 0/259 dead transitions. [2024-11-13 15:08:09,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 259 transitions, 1174 flow [2024-11-13 15:08:09,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-13 15:08:09,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-11-13 15:08:09,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1349 transitions. [2024-11-13 15:08:09,901 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4669435790931118 [2024-11-13 15:08:09,901 INFO L175 Difference]: Start difference. First operand has 115 places, 125 transitions, 424 flow. Second operand 27 states and 1349 transitions. [2024-11-13 15:08:09,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 259 transitions, 1174 flow [2024-11-13 15:08:09,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 259 transitions, 1108 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-11-13 15:08:09,961 INFO L231 Difference]: Finished difference. Result has 134 places, 133 transitions, 514 flow [2024-11-13 15:08:09,961 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=358, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=514, PETRI_PLACES=134, PETRI_TRANSITIONS=133} [2024-11-13 15:08:09,962 INFO L277 CegarLoopForPetriNet]: 100 programPoint places, 34 predicate places. [2024-11-13 15:08:09,962 INFO L471 AbstractCegarLoop]: Abstraction has has 134 places, 133 transitions, 514 flow [2024-11-13 15:08:09,963 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 43.951219512195124) internal successors, (1802), 41 states have internal predecessors, (1802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:08:09,963 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:08:09,963 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:08:09,981 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73b7983-5538-4ce2-bb58-fdee04684b5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-13 15:08:10,163 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73b7983-5538-4ce2-bb58-fdee04684b5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:08:10,163 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 54 more)] === [2024-11-13 15:08:10,164 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:08:10,164 INFO L85 PathProgramCache]: Analyzing trace with hash -888659347, now seen corresponding path program 1 times [2024-11-13 15:08:10,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:08:10,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503875293] [2024-11-13 15:08:10,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:08:10,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:08:10,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:08:10,313 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2024-11-13 15:08:10,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:08:10,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503875293] [2024-11-13 15:08:10,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503875293] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:08:10,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:08:10,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 15:08:10,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872280268] [2024-11-13 15:08:10,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:08:10,316 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 15:08:10,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:08:10,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 15:08:10,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-13 15:08:10,349 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 107 [2024-11-13 15:08:10,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 133 transitions, 514 flow. Second operand has 4 states, 4 states have (on average 58.25) internal successors, (233), 4 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:08:10,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:08:10,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 107 [2024-11-13 15:08:10,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:08:13,829 INFO L124 PetriNetUnfolderBase]: 20705/37690 cut-off events. [2024-11-13 15:08:13,830 INFO L125 PetriNetUnfolderBase]: For 23078/24844 co-relation queries the response was YES. [2024-11-13 15:08:13,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79406 conditions, 37690 events. 20705/37690 cut-off events. For 23078/24844 co-relation queries the response was YES. Maximal size of possible extension queue 1377. Compared 351640 event pairs, 7143 based on Foata normal form. 1542/33309 useless extension candidates. Maximal degree in co-relation 44513. Up to 13371 conditions per place. [2024-11-13 15:08:14,015 INFO L140 encePairwiseOnDemand]: 99/107 looper letters, 147 selfloop transitions, 5 changer transitions 0/198 dead transitions. [2024-11-13 15:08:14,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 198 transitions, 1102 flow [2024-11-13 15:08:14,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 15:08:14,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-13 15:08:14,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 317 transitions. [2024-11-13 15:08:14,017 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7406542056074766 [2024-11-13 15:08:14,017 INFO L175 Difference]: Start difference. First operand has 134 places, 133 transitions, 514 flow. Second operand 4 states and 317 transitions. [2024-11-13 15:08:14,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 198 transitions, 1102 flow [2024-11-13 15:08:14,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 198 transitions, 1025 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-11-13 15:08:14,076 INFO L231 Difference]: Finished difference. Result has 128 places, 135 transitions, 475 flow [2024-11-13 15:08:14,077 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=439, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=475, PETRI_PLACES=128, PETRI_TRANSITIONS=135} [2024-11-13 15:08:14,077 INFO L277 CegarLoopForPetriNet]: 100 programPoint places, 28 predicate places. [2024-11-13 15:08:14,077 INFO L471 AbstractCegarLoop]: Abstraction has has 128 places, 135 transitions, 475 flow [2024-11-13 15:08:14,078 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 58.25) internal successors, (233), 4 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:08:14,078 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:08:14,078 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:08:14,078 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-13 15:08:14,078 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 54 more)] === [2024-11-13 15:08:14,079 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:08:14,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1900621373, now seen corresponding path program 1 times [2024-11-13 15:08:14,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:08:14,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615988496] [2024-11-13 15:08:14,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:08:14,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:08:14,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:08:16,205 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 9 proven. 39 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-11-13 15:08:16,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:08:16,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615988496] [2024-11-13 15:08:16,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615988496] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:08:16,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908684108] [2024-11-13 15:08:16,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:08:16,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:08:16,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73b7983-5538-4ce2-bb58-fdee04684b5c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:08:16,208 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73b7983-5538-4ce2-bb58-fdee04684b5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:08:16,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73b7983-5538-4ce2-bb58-fdee04684b5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-13 15:08:16,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:08:16,384 INFO L255 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-13 15:08:16,388 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:08:16,395 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-13 15:08:16,442 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 15:08:16,568 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2024-11-13 15:08:16,569 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 13 [2024-11-13 15:08:16,700 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2024-11-13 15:08:16,700 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 13 [2024-11-13 15:08:16,845 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2024-11-13 15:08:16,845 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 13 [2024-11-13 15:08:16,993 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2024-11-13 15:08:16,993 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 13 [2024-11-13 15:08:17,059 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-13 15:08:17,060 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-13 15:08:17,124 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-13 15:08:17,155 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-13 15:08:17,183 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-13 15:08:17,210 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-13 15:08:17,234 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-13 15:08:17,336 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 17 treesize of output 9 [2024-11-13 15:08:17,382 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-11-13 15:08:17,383 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:09:57,615 INFO L349 Elim1Store]: treesize reduction 244, result has 20.0 percent of original size [2024-11-13 15:09:57,616 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 1 new quantified variables, introduced 5 case distinctions, treesize of input 52 treesize of output 73 [2024-11-13 15:09:57,632 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:09:57,632 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 39 treesize of output 35 [2024-11-13 15:09:57,640 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 11 treesize of output 9 [2024-11-13 15:09:57,749 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 14 proven. 33 refuted. 1 times theorem prover too weak. 57 trivial. 0 not checked. [2024-11-13 15:09:57,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908684108] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:09:57,750 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:09:57,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 43 [2024-11-13 15:09:57,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217687515] [2024-11-13 15:09:57,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:09:57,751 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-13 15:09:57,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:09:57,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-13 15:09:57,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=1603, Unknown=27, NotChecked=0, Total=1892 [2024-11-13 15:10:01,781 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-13 15:10:05,722 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.88s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-13 15:10:09,606 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.79s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-13 15:10:13,735 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-13 15:10:17,900 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-13 15:10:17,900 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 107 [2024-11-13 15:10:17,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 135 transitions, 475 flow. Second operand has 44 states, 44 states have (on average 44.02272727272727) internal successors, (1937), 44 states have internal predecessors, (1937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:10:17,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:10:17,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 107 [2024-11-13 15:10:17,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:10:25,778 INFO L124 PetriNetUnfolderBase]: 31034/48071 cut-off events. [2024-11-13 15:10:25,778 INFO L125 PetriNetUnfolderBase]: For 23610/25617 co-relation queries the response was YES. [2024-11-13 15:10:25,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111273 conditions, 48071 events. 31034/48071 cut-off events. For 23610/25617 co-relation queries the response was YES. Maximal size of possible extension queue 1737. Compared 380128 event pairs, 10002 based on Foata normal form. 1312/44881 useless extension candidates. Maximal degree in co-relation 60730. Up to 15761 conditions per place. [2024-11-13 15:10:26,003 INFO L140 encePairwiseOnDemand]: 89/107 looper letters, 177 selfloop transitions, 47 changer transitions 0/263 dead transitions. [2024-11-13 15:10:26,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 263 transitions, 1273 flow [2024-11-13 15:10:26,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-13 15:10:26,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-11-13 15:10:26,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1340 transitions. [2024-11-13 15:10:26,008 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.463828314295604 [2024-11-13 15:10:26,008 INFO L175 Difference]: Start difference. First operand has 128 places, 135 transitions, 475 flow. Second operand 27 states and 1340 transitions. [2024-11-13 15:10:26,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 263 transitions, 1273 flow [2024-11-13 15:10:26,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 263 transitions, 1273 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-13 15:10:26,276 INFO L231 Difference]: Finished difference. Result has 156 places, 137 transitions, 591 flow [2024-11-13 15:10:26,276 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=469, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=591, PETRI_PLACES=156, PETRI_TRANSITIONS=137} [2024-11-13 15:10:26,277 INFO L277 CegarLoopForPetriNet]: 100 programPoint places, 56 predicate places. [2024-11-13 15:10:26,277 INFO L471 AbstractCegarLoop]: Abstraction has has 156 places, 137 transitions, 591 flow [2024-11-13 15:10:26,278 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 44.02272727272727) internal successors, (1937), 44 states have internal predecessors, (1937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:10:26,278 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:10:26,278 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:10:26,291 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73b7983-5538-4ce2-bb58-fdee04684b5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-13 15:10:26,478 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73b7983-5538-4ce2-bb58-fdee04684b5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-13 15:10:26,478 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 54 more)] === [2024-11-13 15:10:26,479 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:10:26,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1210278480, now seen corresponding path program 1 times [2024-11-13 15:10:26,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:10:26,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543888643] [2024-11-13 15:10:26,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:10:26,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:10:26,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:10:26,588 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2024-11-13 15:10:26,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:10:26,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543888643] [2024-11-13 15:10:26,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543888643] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:10:26,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:10:26,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 15:10:26,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983916440] [2024-11-13 15:10:26,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:10:26,589 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 15:10:26,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:10:26,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 15:10:26,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-13 15:10:26,627 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 107 [2024-11-13 15:10:26,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 137 transitions, 591 flow. Second operand has 4 states, 4 states have (on average 58.0) internal successors, (232), 4 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:10:26,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:10:26,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 107 [2024-11-13 15:10:26,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:10:31,259 INFO L124 PetriNetUnfolderBase]: 18765/35067 cut-off events. [2024-11-13 15:10:31,259 INFO L125 PetriNetUnfolderBase]: For 32112/33168 co-relation queries the response was YES. [2024-11-13 15:10:31,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80756 conditions, 35067 events. 18765/35067 cut-off events. For 32112/33168 co-relation queries the response was YES. Maximal size of possible extension queue 1341. Compared 331917 event pairs, 6960 based on Foata normal form. 1015/31746 useless extension candidates. Maximal degree in co-relation 68259. Up to 13158 conditions per place. [2024-11-13 15:10:31,439 INFO L140 encePairwiseOnDemand]: 102/107 looper letters, 132 selfloop transitions, 8 changer transitions 0/186 dead transitions. [2024-11-13 15:10:31,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 186 transitions, 998 flow [2024-11-13 15:10:31,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 15:10:31,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-13 15:10:31,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 316 transitions. [2024-11-13 15:10:31,440 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7383177570093458 [2024-11-13 15:10:31,441 INFO L175 Difference]: Start difference. First operand has 156 places, 137 transitions, 591 flow. Second operand 4 states and 316 transitions. [2024-11-13 15:10:31,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 186 transitions, 998 flow [2024-11-13 15:10:31,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 186 transitions, 907 flow, removed 1 selfloop flow, removed 25 redundant places. [2024-11-13 15:10:31,535 INFO L231 Difference]: Finished difference. Result has 134 places, 135 transitions, 499 flow [2024-11-13 15:10:31,535 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=483, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=499, PETRI_PLACES=134, PETRI_TRANSITIONS=135} [2024-11-13 15:10:31,536 INFO L277 CegarLoopForPetriNet]: 100 programPoint places, 34 predicate places. [2024-11-13 15:10:31,536 INFO L471 AbstractCegarLoop]: Abstraction has has 134 places, 135 transitions, 499 flow [2024-11-13 15:10:31,536 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 58.0) internal successors, (232), 4 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:10:31,536 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:10:31,536 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:10:31,536 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-13 15:10:31,536 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 54 more)] === [2024-11-13 15:10:31,537 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:10:31,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1778634862, now seen corresponding path program 1 times [2024-11-13 15:10:31,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:10:31,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882805416] [2024-11-13 15:10:31,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:10:31,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:10:31,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:10:32,813 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-13 15:10:32,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:10:32,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882805416] [2024-11-13 15:10:32,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882805416] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:10:32,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344032265] [2024-11-13 15:10:32,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:10:32,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:10:32,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73b7983-5538-4ce2-bb58-fdee04684b5c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:10:32,816 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73b7983-5538-4ce2-bb58-fdee04684b5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:10:32,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73b7983-5538-4ce2-bb58-fdee04684b5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-13 15:10:33,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:10:33,008 INFO L255 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-13 15:10:33,015 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:10:33,059 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 15:10:33,156 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2024-11-13 15:10:33,156 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 11 [2024-11-13 15:10:33,258 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2024-11-13 15:10:33,258 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 11 [2024-11-13 15:10:33,379 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2024-11-13 15:10:33,379 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 11 [2024-11-13 15:10:33,495 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2024-11-13 15:10:33,496 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 11 [2024-11-13 15:10:33,612 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 [2024-11-13 15:10:33,645 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 18 proven. 17 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-13 15:10:33,645 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:10:34,693 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 21 treesize of output 19 [2024-11-13 15:10:34,697 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 98 treesize of output 94 [2024-11-13 15:10:34,715 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2024-11-13 15:10:34,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344032265] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:10:34,715 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:10:34,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 9] total 33 [2024-11-13 15:10:34,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339184204] [2024-11-13 15:10:34,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:10:34,716 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-13 15:10:34,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:10:34,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-13 15:10:34,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=937, Unknown=0, NotChecked=0, Total=1122 [2024-11-13 15:10:35,161 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 107 [2024-11-13 15:10:35,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 135 transitions, 499 flow. Second operand has 34 states, 34 states have (on average 52.588235294117645) internal successors, (1788), 34 states have internal predecessors, (1788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:10:35,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:10:35,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 107 [2024-11-13 15:10:35,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:10:42,713 INFO L124 PetriNetUnfolderBase]: 33041/64294 cut-off events. [2024-11-13 15:10:42,713 INFO L125 PetriNetUnfolderBase]: For 58341/60439 co-relation queries the response was YES. [2024-11-13 15:10:42,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144643 conditions, 64294 events. 33041/64294 cut-off events. For 58341/60439 co-relation queries the response was YES. Maximal size of possible extension queue 2053. Compared 669057 event pairs, 8016 based on Foata normal form. 1362/58365 useless extension candidates. Maximal degree in co-relation 129347. Up to 14668 conditions per place. [2024-11-13 15:10:43,063 INFO L140 encePairwiseOnDemand]: 89/107 looper letters, 177 selfloop transitions, 47 changer transitions 0/274 dead transitions. [2024-11-13 15:10:43,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 274 transitions, 1604 flow [2024-11-13 15:10:43,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-13 15:10:43,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-13 15:10:43,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1042 transitions. [2024-11-13 15:10:43,066 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5728422210005497 [2024-11-13 15:10:43,066 INFO L175 Difference]: Start difference. First operand has 134 places, 135 transitions, 499 flow. Second operand 17 states and 1042 transitions. [2024-11-13 15:10:43,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 274 transitions, 1604 flow [2024-11-13 15:10:43,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 274 transitions, 1548 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-13 15:10:43,463 INFO L231 Difference]: Finished difference. Result has 151 places, 143 transitions, 643 flow [2024-11-13 15:10:43,463 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=487, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=643, PETRI_PLACES=151, PETRI_TRANSITIONS=143} [2024-11-13 15:10:43,463 INFO L277 CegarLoopForPetriNet]: 100 programPoint places, 51 predicate places. [2024-11-13 15:10:43,464 INFO L471 AbstractCegarLoop]: Abstraction has has 151 places, 143 transitions, 643 flow [2024-11-13 15:10:43,464 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 52.588235294117645) internal successors, (1788), 34 states have internal predecessors, (1788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:10:43,465 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:10:43,465 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:10:43,486 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73b7983-5538-4ce2-bb58-fdee04684b5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-13 15:10:43,665 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73b7983-5538-4ce2-bb58-fdee04684b5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:10:43,665 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 54 more)] === [2024-11-13 15:10:43,665 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:10:43,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1210279505, now seen corresponding path program 1 times [2024-11-13 15:10:43,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:10:43,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754458663] [2024-11-13 15:10:43,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:10:43,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:10:43,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:10:45,543 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-11-13 15:10:45,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:10:45,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754458663] [2024-11-13 15:10:45,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754458663] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:10:45,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669287307] [2024-11-13 15:10:45,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:10:45,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:10:45,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73b7983-5538-4ce2-bb58-fdee04684b5c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:10:45,547 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73b7983-5538-4ce2-bb58-fdee04684b5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:10:45,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73b7983-5538-4ce2-bb58-fdee04684b5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-13 15:10:45,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:10:45,720 INFO L255 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-11-13 15:10:45,725 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:10:45,740 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-13 15:10:45,786 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 15:10:45,890 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2024-11-13 15:10:45,890 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 13 [2024-11-13 15:10:45,985 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2024-11-13 15:10:45,985 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 13 [2024-11-13 15:10:46,081 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2024-11-13 15:10:46,081 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 13 [2024-11-13 15:10:46,182 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2024-11-13 15:10:46,182 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 13 [2024-11-13 15:10:46,242 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-11-13 15:10:46,242 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2024-11-13 15:10:46,293 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-13 15:10:46,334 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-13 15:10:46,372 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-13 15:10:46,410 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-13 15:10:46,445 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-13 15:10:46,541 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2024-11-13 15:10:46,542 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2024-11-13 15:10:46,585 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-13 15:10:46,607 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-13 15:10:46,629 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-13 15:10:46,649 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-13 15:10:46,667 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-13 15:10:46,750 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 17 treesize of output 9 [2024-11-13 15:10:46,866 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 18 proven. 43 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-11-13 15:10:46,866 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:12:36,342 INFO L349 Elim1Store]: treesize reduction 244, result has 20.0 percent of original size [2024-11-13 15:12:36,342 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 1 new quantified variables, introduced 5 case distinctions, treesize of input 55 treesize of output 76 [2024-11-13 15:12:36,355 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:12:36,356 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 143 treesize of output 135 [2024-11-13 15:12:36,364 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 27 treesize of output 25 [2024-11-13 15:12:36,371 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 28 treesize of output 24 [2024-11-13 15:12:36,607 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 13 proven. 46 refuted. 2 times theorem prover too weak. 44 trivial. 0 not checked. [2024-11-13 15:12:36,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669287307] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:12:36,608 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:12:36,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 48 [2024-11-13 15:12:36,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371313926] [2024-11-13 15:12:36,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:12:36,608 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-11-13 15:12:36,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:12:36,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-11-13 15:12:36,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=2131, Unknown=33, NotChecked=0, Total=2450 [2024-11-13 15:12:37,600 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 107 [2024-11-13 15:12:37,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 143 transitions, 643 flow. Second operand has 50 states, 50 states have (on average 42.12) internal successors, (2106), 50 states have internal predecessors, (2106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:12:37,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:12:37,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 107 [2024-11-13 15:12:37,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand