./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.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_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/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_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/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_0d163267-038f-482e-a090-3cf5335d8f3c/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 613bf9314e4e3fb6e64527ec38c7e6b39400e524de37a5103e9f06d9db406d3d --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-13 14:00:38,577 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-13 14:00:38,672 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-Overflow-32bit-Automizer_Default.epf [2024-11-13 14:00:38,678 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-13 14:00:38,679 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-13 14:00:38,706 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-13 14:00:38,706 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-13 14:00:38,707 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-13 14:00:38,707 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-13 14:00:38,707 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-13 14:00:38,707 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-13 14:00:38,707 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-13 14:00:38,708 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-13 14:00:38,708 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-13 14:00:38,708 INFO L153 SettingsManager]: * Use SBE=true [2024-11-13 14:00:38,708 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-13 14:00:38,708 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-13 14:00:38,709 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-13 14:00:38,709 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-13 14:00:38,709 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-13 14:00:38,709 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-13 14:00:38,709 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-13 14:00:38,709 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-13 14:00:38,709 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-13 14:00:38,709 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-13 14:00:38,710 INFO L153 SettingsManager]: * Check absence of signed integer overflows=ASSERTandASSUME [2024-11-13 14:00:38,710 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-13 14:00:38,710 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-13 14:00:38,710 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-13 14:00:38,710 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-13 14:00:38,710 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-13 14:00:38,710 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-13 14:00:38,710 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-13 14:00:38,711 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-13 14:00:38,711 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 14:00:38,711 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-13 14:00:38,711 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-13 14:00:38,711 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-13 14:00:38,711 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-13 14:00:38,711 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-13 14:00:38,712 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-13 14:00:38,712 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-13 14:00:38,712 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-13 14:00:38,712 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-13 14:00:38,712 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_0d163267-038f-482e-a090-3cf5335d8f3c/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 -> 613bf9314e4e3fb6e64527ec38c7e6b39400e524de37a5103e9f06d9db406d3d [2024-11-13 14:00:39,088 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-13 14:00:39,098 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-13 14:00:39,101 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-13 14:00:39,103 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-13 14:00:39,103 INFO L274 PluginConnector]: CDTParser initialized [2024-11-13 14:00:39,105 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/../../sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c Unable to find full path for "g++" [2024-11-13 14:00:41,283 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-13 14:00:41,620 INFO L384 CDTParser]: Found 1 translation units. [2024-11-13 14:00:41,623 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c [2024-11-13 14:00:41,638 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/data/604c5768a/cafd59cd0a9a458298f15d855dc61905/FLAG848312b4d [2024-11-13 14:00:41,865 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/data/604c5768a/cafd59cd0a9a458298f15d855dc61905 [2024-11-13 14:00:41,868 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-13 14:00:41,876 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-13 14:00:41,885 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-13 14:00:41,885 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-13 14:00:41,895 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-13 14:00:41,900 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:00:41" (1/1) ... [2024-11-13 14:00:41,901 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77f99c67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:00:41, skipping insertion in model container [2024-11-13 14:00:41,901 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:00:41" (1/1) ... [2024-11-13 14:00:41,955 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 14:00:42,258 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 14:00:42,270 INFO L200 MainTranslator]: Completed pre-run [2024-11-13 14:00:42,301 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 14:00:42,321 INFO L204 MainTranslator]: Completed translation [2024-11-13 14:00:42,322 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:00:42 WrapperNode [2024-11-13 14:00:42,322 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-13 14:00:42,323 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-13 14:00:42,324 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-13 14:00:42,324 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-13 14:00:42,332 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:00:42" (1/1) ... [2024-11-13 14:00:42,342 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:00:42" (1/1) ... [2024-11-13 14:00:42,376 INFO L138 Inliner]: procedures = 24, calls = 30, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 170 [2024-11-13 14:00:42,377 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-13 14:00:42,378 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-13 14:00:42,378 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-13 14:00:42,378 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-13 14:00:42,388 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:00:42" (1/1) ... [2024-11-13 14:00:42,388 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:00:42" (1/1) ... [2024-11-13 14:00:42,391 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:00:42" (1/1) ... [2024-11-13 14:00:42,407 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-13 14:00:42,408 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:00:42" (1/1) ... [2024-11-13 14:00:42,408 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:00:42" (1/1) ... [2024-11-13 14:00:42,415 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:00:42" (1/1) ... [2024-11-13 14:00:42,423 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:00:42" (1/1) ... [2024-11-13 14:00:42,425 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:00:42" (1/1) ... [2024-11-13 14:00:42,426 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:00:42" (1/1) ... [2024-11-13 14:00:42,429 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-13 14:00:42,429 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-13 14:00:42,430 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-13 14:00:42,430 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-13 14:00:42,431 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:00:42" (1/1) ... [2024-11-13 14:00:42,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 14:00:42,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:00:42,473 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-13 14:00:42,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-13 14:00:42,514 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-13 14:00:42,515 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-13 14:00:42,516 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-13 14:00:42,516 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-13 14:00:42,517 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-13 14:00:42,517 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-13 14:00:42,517 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-13 14:00:42,517 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-13 14:00:42,517 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-13 14:00:42,517 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-13 14:00:42,517 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-13 14:00:42,517 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-13 14:00:42,517 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-13 14:00:42,517 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-13 14:00:42,517 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-13 14:00:42,518 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-13 14:00:42,519 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 14:00:42,667 INFO L238 CfgBuilder]: Building ICFG [2024-11-13 14:00:42,670 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-13 14:00:43,290 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-13 14:00:43,291 INFO L287 CfgBuilder]: Performing block encoding [2024-11-13 14:00:43,672 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-13 14:00:43,672 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-13 14:00:43,673 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:00:43 BoogieIcfgContainer [2024-11-13 14:00:43,673 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-13 14:00:43,676 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-13 14:00:43,676 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-13 14:00:43,683 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-13 14:00:43,683 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 02:00:41" (1/3) ... [2024-11-13 14:00:43,684 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e449ecc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:00:43, skipping insertion in model container [2024-11-13 14:00:43,684 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:00:42" (2/3) ... [2024-11-13 14:00:43,685 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e449ecc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:00:43, skipping insertion in model container [2024-11-13 14:00:43,685 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:00:43" (3/3) ... [2024-11-13 14:00:43,686 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-queue-add-2-nl.wvr.c [2024-11-13 14:00:43,708 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-13 14:00:43,710 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-more-queue-add-2-nl.wvr.c that has 3 procedures, 41 locations, 1 initial locations, 3 loop locations, and 12 error locations. [2024-11-13 14:00:43,710 INFO L492 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-13 14:00:43,804 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-13 14:00:43,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 47 places, 44 transitions, 102 flow [2024-11-13 14:00:43,937 INFO L124 PetriNetUnfolderBase]: 4/42 cut-off events. [2024-11-13 14:00:43,941 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-13 14:00:43,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51 conditions, 42 events. 4/42 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 119 event pairs, 0 based on Foata normal form. 0/26 useless extension candidates. Maximal degree in co-relation 33. Up to 2 conditions per place. [2024-11-13 14:00:43,948 INFO L82 GeneralOperation]: Start removeDead. Operand has 47 places, 44 transitions, 102 flow [2024-11-13 14:00:43,952 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 40 transitions, 89 flow [2024-11-13 14:00:43,963 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-13 14:00:43,986 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;@74654d70, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-13 14:00:43,986 INFO L334 AbstractCegarLoop]: Starting to check reachability of 24 error locations. [2024-11-13 14:00:43,995 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-13 14:00:43,995 INFO L124 PetriNetUnfolderBase]: 0/3 cut-off events. [2024-11-13 14:00:43,995 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-13 14:00:43,995 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:00:43,996 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-13 14:00:44,001 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2024-11-13 14:00:44,006 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:00:44,006 INFO L85 PathProgramCache]: Analyzing trace with hash 535974, now seen corresponding path program 1 times [2024-11-13 14:00:44,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:00:44,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171880376] [2024-11-13 14:00:44,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:00:44,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:00:44,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:00:44,349 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 14:00:44,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:00:44,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171880376] [2024-11-13 14:00:44,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171880376] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:00:44,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:00:44,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 14:00:44,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320169103] [2024-11-13 14:00:44,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:00:44,368 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 14:00:44,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:00:44,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 14:00:44,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 14:00:44,439 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-11-13 14:00:44,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 40 transitions, 89 flow. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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 14:00:44,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:00:44,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-11-13 14:00:44,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:00:44,742 INFO L124 PetriNetUnfolderBase]: 177/396 cut-off events. [2024-11-13 14:00:44,743 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2024-11-13 14:00:44,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 735 conditions, 396 events. 177/396 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2004 event pairs, 154 based on Foata normal form. 20/310 useless extension candidates. Maximal degree in co-relation 679. Up to 308 conditions per place. [2024-11-13 14:00:44,751 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 24 selfloop transitions, 4 changer transitions 0/39 dead transitions. [2024-11-13 14:00:44,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 39 transitions, 143 flow [2024-11-13 14:00:44,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 14:00:44,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-13 14:00:44,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 86 transitions. [2024-11-13 14:00:44,770 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48863636363636365 [2024-11-13 14:00:44,772 INFO L175 Difference]: Start difference. First operand has 43 places, 40 transitions, 89 flow. Second operand 4 states and 86 transitions. [2024-11-13 14:00:44,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 39 transitions, 143 flow [2024-11-13 14:00:44,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 39 transitions, 138 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-13 14:00:44,784 INFO L231 Difference]: Finished difference. Result has 42 places, 39 transitions, 105 flow [2024-11-13 14:00:44,787 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=105, PETRI_PLACES=42, PETRI_TRANSITIONS=39} [2024-11-13 14:00:44,792 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, -1 predicate places. [2024-11-13 14:00:44,792 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 39 transitions, 105 flow [2024-11-13 14:00:44,792 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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 14:00:44,793 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:00:44,793 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-11-13 14:00:44,793 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-13 14:00:44,794 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2024-11-13 14:00:44,794 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:00:44,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1212134659, now seen corresponding path program 1 times [2024-11-13 14:00:44,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:00:44,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842629869] [2024-11-13 14:00:44,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:00:44,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:00:44,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:00:45,101 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 14:00:45,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:00:45,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842629869] [2024-11-13 14:00:45,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842629869] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:00:45,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285068392] [2024-11-13 14:00:45,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:00:45,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:00:45,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:00:45,105 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:00:45,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-13 14:00:45,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:00:45,229 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-13 14:00:45,234 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:00:45,307 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 14:00:45,308 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 14:00:45,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285068392] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:00:45,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 14:00:45,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2024-11-13 14:00:45,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632853172] [2024-11-13 14:00:45,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:00:45,310 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 14:00:45,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:00:45,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 14:00:45,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-13 14:00:45,327 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-11-13 14:00:45,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 39 transitions, 105 flow. Second operand has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 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 14:00:45,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:00:45,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-11-13 14:00:45,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:00:45,562 INFO L124 PetriNetUnfolderBase]: 177/395 cut-off events. [2024-11-13 14:00:45,563 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-13 14:00:45,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 738 conditions, 395 events. 177/395 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2020 event pairs, 154 based on Foata normal form. 1/291 useless extension candidates. Maximal degree in co-relation 711. Up to 303 conditions per place. [2024-11-13 14:00:45,569 INFO L140 encePairwiseOnDemand]: 39/44 looper letters, 20 selfloop transitions, 7 changer transitions 0/38 dead transitions. [2024-11-13 14:00:45,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 38 transitions, 155 flow [2024-11-13 14:00:45,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 14:00:45,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-13 14:00:45,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-11-13 14:00:45,573 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4015151515151515 [2024-11-13 14:00:45,573 INFO L175 Difference]: Start difference. First operand has 42 places, 39 transitions, 105 flow. Second operand 6 states and 106 transitions. [2024-11-13 14:00:45,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 38 transitions, 155 flow [2024-11-13 14:00:45,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 38 transitions, 152 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-13 14:00:45,577 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 112 flow [2024-11-13 14:00:45,579 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=112, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-11-13 14:00:45,580 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 2 predicate places. [2024-11-13 14:00:45,581 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 112 flow [2024-11-13 14:00:45,582 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 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 14:00:45,582 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:00:45,583 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-13 14:00:45,609 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-13 14:00:45,787 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:00:45,788 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2024-11-13 14:00:45,789 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:00:45,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1210220898, now seen corresponding path program 1 times [2024-11-13 14:00:45,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:00:45,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051009610] [2024-11-13 14:00:45,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:00:45,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:00:45,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:00:45,971 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 14:00:45,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:00:45,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051009610] [2024-11-13 14:00:45,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051009610] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:00:45,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:00:45,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 14:00:45,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490424577] [2024-11-13 14:00:45,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:00:45,975 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 14:00:45,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:00:45,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 14:00:45,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 14:00:45,976 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 44 [2024-11-13 14:00:45,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 112 flow. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 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 14:00:45,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:00:45,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 44 [2024-11-13 14:00:45,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:00:46,224 INFO L124 PetriNetUnfolderBase]: 189/430 cut-off events. [2024-11-13 14:00:46,225 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-13 14:00:46,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 815 conditions, 430 events. 189/430 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2130 event pairs, 167 based on Foata normal form. 14/350 useless extension candidates. Maximal degree in co-relation 713. Up to 305 conditions per place. [2024-11-13 14:00:46,233 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 23 selfloop transitions, 2 changer transitions 8/45 dead transitions. [2024-11-13 14:00:46,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 45 transitions, 195 flow [2024-11-13 14:00:46,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 14:00:46,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-13 14:00:46,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 99 transitions. [2024-11-13 14:00:46,236 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-11-13 14:00:46,236 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 112 flow. Second operand 4 states and 99 transitions. [2024-11-13 14:00:46,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 45 transitions, 195 flow [2024-11-13 14:00:46,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 45 transitions, 173 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-11-13 14:00:46,241 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 104 flow [2024-11-13 14:00:46,241 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=104, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-11-13 14:00:46,242 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 1 predicate places. [2024-11-13 14:00:46,244 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 104 flow [2024-11-13 14:00:46,244 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 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 14:00:46,244 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:00:46,245 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2024-11-13 14:00:46,245 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-13 14:00:46,245 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2024-11-13 14:00:46,245 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:00:46,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1078531772, now seen corresponding path program 1 times [2024-11-13 14:00:46,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:00:46,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94984860] [2024-11-13 14:00:46,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:00:46,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:00:46,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:00:46,415 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 14:00:46,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:00:46,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94984860] [2024-11-13 14:00:46,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94984860] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:00:46,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079159094] [2024-11-13 14:00:46,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:00:46,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:00:46,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:00:46,418 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:00:46,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-13 14:00:46,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:00:46,524 INFO L255 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-13 14:00:46,525 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:00:46,589 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 14:00:46,589 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:00:46,668 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 14:00:46,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079159094] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:00:46,669 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:00:46,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2024-11-13 14:00:46,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267677224] [2024-11-13 14:00:46,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:00:46,670 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-13 14:00:46,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:00:46,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-13 14:00:46,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-11-13 14:00:46,705 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-11-13 14:00:46,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 104 flow. Second operand has 12 states, 12 states have (on average 14.083333333333334) internal successors, (169), 12 states have internal predecessors, (169), 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 14:00:46,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:00:46,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-11-13 14:00:46,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:00:46,986 INFO L124 PetriNetUnfolderBase]: 179/406 cut-off events. [2024-11-13 14:00:46,986 INFO L125 PetriNetUnfolderBase]: For 60/60 co-relation queries the response was YES. [2024-11-13 14:00:46,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 853 conditions, 406 events. 179/406 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2088 event pairs, 154 based on Foata normal form. 3/302 useless extension candidates. Maximal degree in co-relation 837. Up to 309 conditions per place. [2024-11-13 14:00:46,990 INFO L140 encePairwiseOnDemand]: 39/44 looper letters, 23 selfloop transitions, 12 changer transitions 0/46 dead transitions. [2024-11-13 14:00:46,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 46 transitions, 204 flow [2024-11-13 14:00:46,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-13 14:00:46,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-13 14:00:46,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 168 transitions. [2024-11-13 14:00:46,994 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38181818181818183 [2024-11-13 14:00:46,994 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 104 flow. Second operand 10 states and 168 transitions. [2024-11-13 14:00:46,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 46 transitions, 204 flow [2024-11-13 14:00:46,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 46 transitions, 200 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-13 14:00:46,997 INFO L231 Difference]: Finished difference. Result has 53 places, 46 transitions, 172 flow [2024-11-13 14:00:46,997 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=172, PETRI_PLACES=53, PETRI_TRANSITIONS=46} [2024-11-13 14:00:46,998 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 10 predicate places. [2024-11-13 14:00:46,999 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 46 transitions, 172 flow [2024-11-13 14:00:46,999 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 14.083333333333334) internal successors, (169), 12 states have internal predecessors, (169), 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 14:00:46,999 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:00:46,999 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:00:47,024 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-13 14:00:47,200 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:00:47,200 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2024-11-13 14:00:47,201 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:00:47,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1383845351, now seen corresponding path program 1 times [2024-11-13 14:00:47,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:00:47,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000298382] [2024-11-13 14:00:47,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:00:47,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:00:47,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:00:47,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:00:47,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:00:47,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000298382] [2024-11-13 14:00:47,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000298382] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:00:47,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184554806] [2024-11-13 14:00:47,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:00:47,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:00:47,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:00:47,438 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:00:47,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-13 14:00:47,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:00:47,541 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-13 14:00:47,542 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:00:47,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:00:47,574 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 14:00:47,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184554806] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:00:47,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 14:00:47,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4] total 5 [2024-11-13 14:00:47,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295288648] [2024-11-13 14:00:47,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:00:47,576 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 14:00:47,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:00:47,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 14:00:47,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-13 14:00:47,577 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 44 [2024-11-13 14:00:47,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 46 transitions, 172 flow. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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 14:00:47,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:00:47,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 44 [2024-11-13 14:00:47,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:00:47,696 INFO L124 PetriNetUnfolderBase]: 119/287 cut-off events. [2024-11-13 14:00:47,697 INFO L125 PetriNetUnfolderBase]: For 68/68 co-relation queries the response was YES. [2024-11-13 14:00:47,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 595 conditions, 287 events. 119/287 cut-off events. For 68/68 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1308 event pairs, 98 based on Foata normal form. 0/242 useless extension candidates. Maximal degree in co-relation 560. Up to 214 conditions per place. [2024-11-13 14:00:47,699 INFO L140 encePairwiseOnDemand]: 40/44 looper letters, 30 selfloop transitions, 1 changer transitions 0/43 dead transitions. [2024-11-13 14:00:47,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 43 transitions, 222 flow [2024-11-13 14:00:47,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 14:00:47,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-13 14:00:47,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 68 transitions. [2024-11-13 14:00:47,701 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5151515151515151 [2024-11-13 14:00:47,701 INFO L175 Difference]: Start difference. First operand has 53 places, 46 transitions, 172 flow. Second operand 3 states and 68 transitions. [2024-11-13 14:00:47,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 43 transitions, 222 flow [2024-11-13 14:00:47,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 43 transitions, 212 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-11-13 14:00:47,704 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 152 flow [2024-11-13 14:00:47,705 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=152, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2024-11-13 14:00:47,706 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 7 predicate places. [2024-11-13 14:00:47,706 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 152 flow [2024-11-13 14:00:47,706 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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 14:00:47,706 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:00:47,706 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:00:47,732 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-13 14:00:47,911 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:00:47,911 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2024-11-13 14:00:47,912 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:00:47,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1564461750, now seen corresponding path program 1 times [2024-11-13 14:00:47,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:00:47,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19620605] [2024-11-13 14:00:47,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:00:47,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:00:47,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:00:48,049 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:00:48,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:00:48,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19620605] [2024-11-13 14:00:48,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19620605] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:00:48,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:00:48,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 14:00:48,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787159109] [2024-11-13 14:00:48,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:00:48,050 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 14:00:48,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:00:48,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 14:00:48,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 14:00:48,065 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-11-13 14:00:48,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 152 flow. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:00:48,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:00:48,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-11-13 14:00:48,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:00:48,269 INFO L124 PetriNetUnfolderBase]: 216/449 cut-off events. [2024-11-13 14:00:48,269 INFO L125 PetriNetUnfolderBase]: For 79/79 co-relation queries the response was YES. [2024-11-13 14:00:48,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 933 conditions, 449 events. 216/449 cut-off events. For 79/79 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1979 event pairs, 109 based on Foata normal form. 12/418 useless extension candidates. Maximal degree in co-relation 921. Up to 281 conditions per place. [2024-11-13 14:00:48,273 INFO L140 encePairwiseOnDemand]: 38/44 looper letters, 47 selfloop transitions, 4 changer transitions 0/61 dead transitions. [2024-11-13 14:00:48,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 61 transitions, 300 flow [2024-11-13 14:00:48,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 14:00:48,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-13 14:00:48,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 94 transitions. [2024-11-13 14:00:48,276 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5340909090909091 [2024-11-13 14:00:48,276 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 152 flow. Second operand 4 states and 94 transitions. [2024-11-13 14:00:48,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 61 transitions, 300 flow [2024-11-13 14:00:48,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 61 transitions, 299 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-13 14:00:48,281 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 180 flow [2024-11-13 14:00:48,281 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=180, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2024-11-13 14:00:48,282 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 11 predicate places. [2024-11-13 14:00:48,282 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 180 flow [2024-11-13 14:00:48,282 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:00:48,282 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:00:48,282 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:00:48,283 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-13 14:00:48,283 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2024-11-13 14:00:48,283 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:00:48,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1914609578, now seen corresponding path program 1 times [2024-11-13 14:00:48,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:00:48,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175228326] [2024-11-13 14:00:48,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:00:48,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:00:48,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:00:48,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:00:48,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:00:48,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175228326] [2024-11-13 14:00:48,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175228326] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:00:48,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:00:48,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 14:00:48,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984271955] [2024-11-13 14:00:48,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:00:48,383 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 14:00:48,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:00:48,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 14:00:48,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 14:00:48,384 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 44 [2024-11-13 14:00:48,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 180 flow. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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 14:00:48,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:00:48,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 44 [2024-11-13 14:00:48,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:00:48,505 INFO L124 PetriNetUnfolderBase]: 165/402 cut-off events. [2024-11-13 14:00:48,506 INFO L125 PetriNetUnfolderBase]: For 142/145 co-relation queries the response was YES. [2024-11-13 14:00:48,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 926 conditions, 402 events. 165/402 cut-off events. For 142/145 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1852 event pairs, 52 based on Foata normal form. 3/371 useless extension candidates. Maximal degree in co-relation 912. Up to 238 conditions per place. [2024-11-13 14:00:48,510 INFO L140 encePairwiseOnDemand]: 40/44 looper letters, 37 selfloop transitions, 3 changer transitions 0/52 dead transitions. [2024-11-13 14:00:48,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 52 transitions, 278 flow [2024-11-13 14:00:48,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 14:00:48,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-13 14:00:48,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 73 transitions. [2024-11-13 14:00:48,513 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.553030303030303 [2024-11-13 14:00:48,513 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 180 flow. Second operand 3 states and 73 transitions. [2024-11-13 14:00:48,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 52 transitions, 278 flow [2024-11-13 14:00:48,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 52 transitions, 275 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-13 14:00:48,518 INFO L231 Difference]: Finished difference. Result has 56 places, 48 transitions, 200 flow [2024-11-13 14:00:48,518 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=177, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=200, PETRI_PLACES=56, PETRI_TRANSITIONS=48} [2024-11-13 14:00:48,518 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 13 predicate places. [2024-11-13 14:00:48,519 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 48 transitions, 200 flow [2024-11-13 14:00:48,519 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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 14:00:48,519 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:00:48,519 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:00:48,519 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-13 14:00:48,519 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2024-11-13 14:00:48,519 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:00:48,519 INFO L85 PathProgramCache]: Analyzing trace with hash -476145912, now seen corresponding path program 1 times [2024-11-13 14:00:48,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:00:48,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892968010] [2024-11-13 14:00:48,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:00:48,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:00:48,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:00:49,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:00:49,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:00:49,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892968010] [2024-11-13 14:00:49,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892968010] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:00:49,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40697542] [2024-11-13 14:00:49,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:00:49,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:00:49,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:00:49,420 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:00:49,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-13 14:00:49,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:00:49,536 INFO L255 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-13 14:00:49,539 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:00:49,626 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-13 14:00:50,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:00:50,062 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:00:50,950 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 40 treesize of output 36 [2024-11-13 14:00:50,979 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-13 14:00:50,979 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 50 treesize of output 41 [2024-11-13 14:00:51,126 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:00:51,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40697542] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:00:51,126 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:00:51,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2024-11-13 14:00:51,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389400609] [2024-11-13 14:00:51,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:00:51,127 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-13 14:00:51,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:00:51,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-13 14:00:51,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2024-11-13 14:00:51,332 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-11-13 14:00:51,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 48 transitions, 200 flow. Second operand has 23 states, 23 states have (on average 10.565217391304348) internal successors, (243), 23 states have internal predecessors, (243), 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 14:00:51,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:00:51,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-11-13 14:00:51,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:00:55,256 INFO L124 PetriNetUnfolderBase]: 1305/2626 cut-off events. [2024-11-13 14:00:55,256 INFO L125 PetriNetUnfolderBase]: For 1610/1752 co-relation queries the response was YES. [2024-11-13 14:00:55,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6460 conditions, 2626 events. 1305/2626 cut-off events. For 1610/1752 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 16122 event pairs, 188 based on Foata normal form. 74/2535 useless extension candidates. Maximal degree in co-relation 6444. Up to 416 conditions per place. [2024-11-13 14:00:55,285 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 215 selfloop transitions, 66 changer transitions 2/290 dead transitions. [2024-11-13 14:00:55,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 290 transitions, 1682 flow [2024-11-13 14:00:55,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-13 14:00:55,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-11-13 14:00:55,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 526 transitions. [2024-11-13 14:00:55,289 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42694805194805197 [2024-11-13 14:00:55,289 INFO L175 Difference]: Start difference. First operand has 56 places, 48 transitions, 200 flow. Second operand 28 states and 526 transitions. [2024-11-13 14:00:55,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 290 transitions, 1682 flow [2024-11-13 14:00:55,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 290 transitions, 1557 flow, removed 59 selfloop flow, removed 2 redundant places. [2024-11-13 14:00:55,299 INFO L231 Difference]: Finished difference. Result has 101 places, 109 transitions, 725 flow [2024-11-13 14:00:55,300 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=725, PETRI_PLACES=101, PETRI_TRANSITIONS=109} [2024-11-13 14:00:55,301 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 58 predicate places. [2024-11-13 14:00:55,301 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 109 transitions, 725 flow [2024-11-13 14:00:55,301 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 10.565217391304348) internal successors, (243), 23 states have internal predecessors, (243), 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 14:00:55,301 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:00:55,301 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:00:55,329 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-13 14:00:55,506 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:00:55,506 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2024-11-13 14:00:55,507 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:00:55,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1449175542, now seen corresponding path program 2 times [2024-11-13 14:00:55,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:00:55,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164159276] [2024-11-13 14:00:55,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:00:55,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:00:55,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:00:56,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:00:56,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:00:56,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164159276] [2024-11-13 14:00:56,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164159276] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:00:56,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976388831] [2024-11-13 14:00:56,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 14:00:56,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:00:56,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:00:56,160 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:00:56,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-13 14:00:56,262 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-13 14:00:56,262 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:00:56,263 INFO L255 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-13 14:00:56,265 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:00:56,374 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:00:56,374 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 14:00:56,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976388831] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:00:56,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 14:00:56,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 11 [2024-11-13 14:00:56,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917982107] [2024-11-13 14:00:56,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:00:56,375 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 14:00:56,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:00:56,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 14:00:56,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2024-11-13 14:00:56,401 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-11-13 14:00:56,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 109 transitions, 725 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 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 14:00:56,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:00:56,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-11-13 14:00:56,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:00:57,041 INFO L124 PetriNetUnfolderBase]: 1294/2980 cut-off events. [2024-11-13 14:00:57,041 INFO L125 PetriNetUnfolderBase]: For 14060/14260 co-relation queries the response was YES. [2024-11-13 14:00:57,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10239 conditions, 2980 events. 1294/2980 cut-off events. For 14060/14260 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 21121 event pairs, 215 based on Foata normal form. 109/3069 useless extension candidates. Maximal degree in co-relation 10203. Up to 1397 conditions per place. [2024-11-13 14:00:57,131 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 143 selfloop transitions, 29 changer transitions 0/187 dead transitions. [2024-11-13 14:00:57,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 187 transitions, 1567 flow [2024-11-13 14:00:57,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 14:00:57,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-13 14:00:57,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-11-13 14:00:57,132 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5303030303030303 [2024-11-13 14:00:57,132 INFO L175 Difference]: Start difference. First operand has 101 places, 109 transitions, 725 flow. Second operand 6 states and 140 transitions. [2024-11-13 14:00:57,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 187 transitions, 1567 flow [2024-11-13 14:00:57,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 187 transitions, 1466 flow, removed 43 selfloop flow, removed 4 redundant places. [2024-11-13 14:00:57,230 INFO L231 Difference]: Finished difference. Result has 105 places, 127 transitions, 908 flow [2024-11-13 14:00:57,231 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=666, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=908, PETRI_PLACES=105, PETRI_TRANSITIONS=127} [2024-11-13 14:00:57,231 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 62 predicate places. [2024-11-13 14:00:57,232 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 127 transitions, 908 flow [2024-11-13 14:00:57,232 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 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 14:00:57,232 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:00:57,232 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:00:57,254 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-13 14:00:57,433 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:00:57,433 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2024-11-13 14:00:57,434 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:00:57,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1863347380, now seen corresponding path program 1 times [2024-11-13 14:00:57,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:00:57,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843795130] [2024-11-13 14:00:57,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:00:57,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:00:57,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:00:58,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:00:58,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:00:58,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843795130] [2024-11-13 14:00:58,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843795130] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:00:58,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857010798] [2024-11-13 14:00:58,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:00:58,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:00:58,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:00:58,028 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:00:58,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-13 14:00:58,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:00:58,137 INFO L255 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-13 14:00:58,139 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:00:58,196 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-13 14:00:58,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:00:58,538 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:00:59,229 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 40 treesize of output 36 [2024-11-13 14:00:59,245 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-13 14:00:59,246 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 50 treesize of output 41 [2024-11-13 14:00:59,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:00:59,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857010798] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:00:59,357 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:00:59,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2024-11-13 14:00:59,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305578443] [2024-11-13 14:00:59,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:00:59,357 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-13 14:00:59,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:00:59,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-13 14:00:59,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2024-11-13 14:00:59,503 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-11-13 14:00:59,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 127 transitions, 908 flow. Second operand has 23 states, 23 states have (on average 9.695652173913043) internal successors, (223), 23 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:00:59,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:00:59,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-11-13 14:00:59,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:01:02,194 INFO L124 PetriNetUnfolderBase]: 2212/4416 cut-off events. [2024-11-13 14:01:02,194 INFO L125 PetriNetUnfolderBase]: For 18011/18157 co-relation queries the response was YES. [2024-11-13 14:01:02,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15553 conditions, 4416 events. 2212/4416 cut-off events. For 18011/18157 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 30157 event pairs, 546 based on Foata normal form. 35/4450 useless extension candidates. Maximal degree in co-relation 15513. Up to 1017 conditions per place. [2024-11-13 14:01:02,331 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 133 selfloop transitions, 80 changer transitions 26/245 dead transitions. [2024-11-13 14:01:02,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 245 transitions, 2117 flow [2024-11-13 14:01:02,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-13 14:01:02,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-13 14:01:02,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 253 transitions. [2024-11-13 14:01:02,333 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.359375 [2024-11-13 14:01:02,333 INFO L175 Difference]: Start difference. First operand has 105 places, 127 transitions, 908 flow. Second operand 16 states and 253 transitions. [2024-11-13 14:01:02,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 245 transitions, 2117 flow [2024-11-13 14:01:02,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 245 transitions, 2110 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-13 14:01:02,416 INFO L231 Difference]: Finished difference. Result has 123 places, 146 transitions, 1383 flow [2024-11-13 14:01:02,417 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=901, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1383, PETRI_PLACES=123, PETRI_TRANSITIONS=146} [2024-11-13 14:01:02,417 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 80 predicate places. [2024-11-13 14:01:02,417 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 146 transitions, 1383 flow [2024-11-13 14:01:02,418 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 9.695652173913043) internal successors, (223), 23 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:01:02,418 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:01:02,418 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 1, 1] [2024-11-13 14:01:02,443 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-13 14:01:02,622 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:01:02,622 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2024-11-13 14:01:02,623 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:01:02,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1711853555, now seen corresponding path program 2 times [2024-11-13 14:01:02,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:01:02,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152116697] [2024-11-13 14:01:02,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:01:02,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:01:02,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:01:02,919 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 14:01:02,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:01:02,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152116697] [2024-11-13 14:01:02,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152116697] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:01:02,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460214810] [2024-11-13 14:01:02,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 14:01:02,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:01:02,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:01:02,923 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:01:02,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-13 14:01:03,019 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-13 14:01:03,019 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:01:03,020 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-13 14:01:03,021 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:01:03,089 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 14:01:03,090 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:01:03,131 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 14:01:03,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460214810] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:01:03,132 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:01:03,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 2, 2] total 12 [2024-11-13 14:01:03,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169825992] [2024-11-13 14:01:03,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:01:03,133 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-13 14:01:03,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:01:03,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-13 14:01:03,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2024-11-13 14:01:03,162 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-11-13 14:01:03,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 146 transitions, 1383 flow. Second operand has 14 states, 14 states have (on average 14.142857142857142) internal successors, (198), 14 states have internal predecessors, (198), 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 14:01:03,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:01:03,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-11-13 14:01:03,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:01:04,159 INFO L124 PetriNetUnfolderBase]: 1167/2861 cut-off events. [2024-11-13 14:01:04,159 INFO L125 PetriNetUnfolderBase]: For 20099/20275 co-relation queries the response was YES. [2024-11-13 14:01:04,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11598 conditions, 2861 events. 1167/2861 cut-off events. For 20099/20275 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 21420 event pairs, 751 based on Foata normal form. 4/2804 useless extension candidates. Maximal degree in co-relation 11553. Up to 1974 conditions per place. [2024-11-13 14:01:04,192 INFO L140 encePairwiseOnDemand]: 39/44 looper letters, 109 selfloop transitions, 18 changer transitions 0/148 dead transitions. [2024-11-13 14:01:04,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 148 transitions, 1651 flow [2024-11-13 14:01:04,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-13 14:01:04,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-13 14:01:04,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 218 transitions. [2024-11-13 14:01:04,194 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3538961038961039 [2024-11-13 14:01:04,195 INFO L175 Difference]: Start difference. First operand has 123 places, 146 transitions, 1383 flow. Second operand 14 states and 218 transitions. [2024-11-13 14:01:04,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 148 transitions, 1651 flow [2024-11-13 14:01:04,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 148 transitions, 1519 flow, removed 50 selfloop flow, removed 10 redundant places. [2024-11-13 14:01:04,335 INFO L231 Difference]: Finished difference. Result has 123 places, 148 transitions, 1301 flow [2024-11-13 14:01:04,336 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1245, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1301, PETRI_PLACES=123, PETRI_TRANSITIONS=148} [2024-11-13 14:01:04,338 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 80 predicate places. [2024-11-13 14:01:04,338 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 148 transitions, 1301 flow [2024-11-13 14:01:04,338 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 14.142857142857142) internal successors, (198), 14 states have internal predecessors, (198), 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 14:01:04,338 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:01:04,338 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:01:04,363 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-13 14:01:04,543 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:01:04,543 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2024-11-13 14:01:04,544 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:01:04,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1870706361, now seen corresponding path program 1 times [2024-11-13 14:01:04,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:01:04,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542434355] [2024-11-13 14:01:04,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:01:04,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:01:04,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:01:05,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:01:05,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:01:05,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542434355] [2024-11-13 14:01:05,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542434355] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:01:05,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374289419] [2024-11-13 14:01:05,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:01:05,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:01:05,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:01:05,076 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:01:05,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-13 14:01:05,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:01:05,181 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-13 14:01:05,183 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:01:05,232 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-13 14:01:05,668 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:01:05,668 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:01:06,253 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 38 treesize of output 34 [2024-11-13 14:01:06,272 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-13 14:01:06,273 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 37 [2024-11-13 14:01:06,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:01:06,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374289419] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:01:06,362 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:01:06,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2024-11-13 14:01:06,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315643401] [2024-11-13 14:01:06,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:01:06,363 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-13 14:01:06,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:01:06,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-13 14:01:06,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2024-11-13 14:01:06,649 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-11-13 14:01:06,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 148 transitions, 1301 flow. Second operand has 23 states, 23 states have (on average 11.565217391304348) internal successors, (266), 23 states have internal predecessors, (266), 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 14:01:06,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:01:06,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-11-13 14:01:06,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:01:09,034 INFO L124 PetriNetUnfolderBase]: 1488/3304 cut-off events. [2024-11-13 14:01:09,034 INFO L125 PetriNetUnfolderBase]: For 15156/15303 co-relation queries the response was YES. [2024-11-13 14:01:09,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12160 conditions, 3304 events. 1488/3304 cut-off events. For 15156/15303 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 23234 event pairs, 318 based on Foata normal form. 133/3388 useless extension candidates. Maximal degree in co-relation 12120. Up to 584 conditions per place. [2024-11-13 14:01:09,072 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 167 selfloop transitions, 97 changer transitions 0/281 dead transitions. [2024-11-13 14:01:09,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 281 transitions, 2516 flow [2024-11-13 14:01:09,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-13 14:01:09,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-13 14:01:09,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 337 transitions. [2024-11-13 14:01:09,074 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.40311004784689 [2024-11-13 14:01:09,074 INFO L175 Difference]: Start difference. First operand has 123 places, 148 transitions, 1301 flow. Second operand 19 states and 337 transitions. [2024-11-13 14:01:09,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 281 transitions, 2516 flow [2024-11-13 14:01:09,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 281 transitions, 2393 flow, removed 19 selfloop flow, removed 15 redundant places. [2024-11-13 14:01:09,158 INFO L231 Difference]: Finished difference. Result has 133 places, 166 transitions, 1662 flow [2024-11-13 14:01:09,158 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1055, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1662, PETRI_PLACES=133, PETRI_TRANSITIONS=166} [2024-11-13 14:01:09,159 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 90 predicate places. [2024-11-13 14:01:09,159 INFO L471 AbstractCegarLoop]: Abstraction has has 133 places, 166 transitions, 1662 flow [2024-11-13 14:01:09,159 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 11.565217391304348) internal successors, (266), 23 states have internal predecessors, (266), 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 14:01:09,160 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:01:09,160 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:01:09,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-13 14:01:09,364 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:01:09,364 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2024-11-13 14:01:09,364 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:01:09,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1728104113, now seen corresponding path program 1 times [2024-11-13 14:01:09,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:01:09,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516027484] [2024-11-13 14:01:09,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:01:09,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:01:09,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:01:09,872 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:01:09,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:01:09,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516027484] [2024-11-13 14:01:09,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516027484] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:01:09,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704271653] [2024-11-13 14:01:09,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:01:09,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:01:09,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:01:09,875 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:01:09,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-13 14:01:09,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:01:09,982 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-13 14:01:09,984 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:01:10,023 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-13 14:01:10,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:01:10,289 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:01:10,854 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 38 treesize of output 34 [2024-11-13 14:01:10,868 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-13 14:01:10,869 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 37 [2024-11-13 14:01:10,943 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:01:10,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704271653] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:01:10,944 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:01:10,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2024-11-13 14:01:10,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661104861] [2024-11-13 14:01:10,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:01:10,944 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-13 14:01:10,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:01:10,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-13 14:01:10,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2024-11-13 14:01:11,148 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-11-13 14:01:11,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 166 transitions, 1662 flow. Second operand has 23 states, 23 states have (on average 10.695652173913043) internal successors, (246), 23 states have internal predecessors, (246), 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 14:01:11,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:01:11,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-11-13 14:01:11,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:01:13,578 INFO L124 PetriNetUnfolderBase]: 1933/4150 cut-off events. [2024-11-13 14:01:13,578 INFO L125 PetriNetUnfolderBase]: For 22362/22479 co-relation queries the response was YES. [2024-11-13 14:01:13,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16077 conditions, 4150 events. 1933/4150 cut-off events. For 22362/22479 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 29739 event pairs, 341 based on Foata normal form. 22/4145 useless extension candidates. Maximal degree in co-relation 16034. Up to 852 conditions per place. [2024-11-13 14:01:13,625 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 155 selfloop transitions, 109 changer transitions 12/292 dead transitions. [2024-11-13 14:01:13,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 292 transitions, 2950 flow [2024-11-13 14:01:13,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-13 14:01:13,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-13 14:01:13,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 344 transitions. [2024-11-13 14:01:13,628 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3722943722943723 [2024-11-13 14:01:13,628 INFO L175 Difference]: Start difference. First operand has 133 places, 166 transitions, 1662 flow. Second operand 21 states and 344 transitions. [2024-11-13 14:01:13,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 292 transitions, 2950 flow [2024-11-13 14:01:13,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 292 transitions, 2903 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-11-13 14:01:13,789 INFO L231 Difference]: Finished difference. Result has 150 places, 179 transitions, 2093 flow [2024-11-13 14:01:13,791 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1623, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2093, PETRI_PLACES=150, PETRI_TRANSITIONS=179} [2024-11-13 14:01:13,791 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 107 predicate places. [2024-11-13 14:01:13,792 INFO L471 AbstractCegarLoop]: Abstraction has has 150 places, 179 transitions, 2093 flow [2024-11-13 14:01:13,793 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 10.695652173913043) internal successors, (246), 23 states have internal predecessors, (246), 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 14:01:13,793 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:01:13,793 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:01:13,817 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-13 14:01:13,997 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-13 14:01:13,997 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2024-11-13 14:01:13,997 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:01:13,998 INFO L85 PathProgramCache]: Analyzing trace with hash 605475947, now seen corresponding path program 1 times [2024-11-13 14:01:13,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:01:13,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28221444] [2024-11-13 14:01:13,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:01:13,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:01:14,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:01:14,148 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:01:14,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:01:14,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28221444] [2024-11-13 14:01:14,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28221444] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:01:14,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457588826] [2024-11-13 14:01:14,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:01:14,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:01:14,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:01:14,151 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:01:14,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-13 14:01:14,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:01:14,253 INFO L255 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-13 14:01:14,254 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:01:14,369 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:01:14,369 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:01:14,509 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:01:14,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457588826] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:01:14,509 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:01:14,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2024-11-13 14:01:14,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889861341] [2024-11-13 14:01:14,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:01:14,510 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-13 14:01:14,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:01:14,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-13 14:01:14,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2024-11-13 14:01:14,538 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-11-13 14:01:14,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 179 transitions, 2093 flow. Second operand has 15 states, 15 states have (on average 14.8) internal successors, (222), 15 states have internal predecessors, (222), 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 14:01:14,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:01:14,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-11-13 14:01:14,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:01:14,896 INFO L124 PetriNetUnfolderBase]: 407/1014 cut-off events. [2024-11-13 14:01:14,897 INFO L125 PetriNetUnfolderBase]: For 6714/6748 co-relation queries the response was YES. [2024-11-13 14:01:14,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4057 conditions, 1014 events. 407/1014 cut-off events. For 6714/6748 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 6467 event pairs, 258 based on Foata normal form. 58/1027 useless extension candidates. Maximal degree in co-relation 4017. Up to 472 conditions per place. [2024-11-13 14:01:14,906 INFO L140 encePairwiseOnDemand]: 38/44 looper letters, 54 selfloop transitions, 15 changer transitions 2/86 dead transitions. [2024-11-13 14:01:14,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 86 transitions, 780 flow [2024-11-13 14:01:14,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-13 14:01:14,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-13 14:01:14,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-11-13 14:01:14,908 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42329545454545453 [2024-11-13 14:01:14,908 INFO L175 Difference]: Start difference. First operand has 150 places, 179 transitions, 2093 flow. Second operand 8 states and 149 transitions. [2024-11-13 14:01:14,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 86 transitions, 780 flow [2024-11-13 14:01:14,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 86 transitions, 623 flow, removed 22 selfloop flow, removed 32 redundant places. [2024-11-13 14:01:14,931 INFO L231 Difference]: Finished difference. Result has 102 places, 73 transitions, 468 flow [2024-11-13 14:01:14,932 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=438, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=468, PETRI_PLACES=102, PETRI_TRANSITIONS=73} [2024-11-13 14:01:14,932 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 59 predicate places. [2024-11-13 14:01:14,934 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 73 transitions, 468 flow [2024-11-13 14:01:14,934 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 14.8) internal successors, (222), 15 states have internal predecessors, (222), 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 14:01:14,934 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:01:14,934 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:01:14,959 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-13 14:01:15,135 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-13 14:01:15,135 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2024-11-13 14:01:15,135 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:01:15,136 INFO L85 PathProgramCache]: Analyzing trace with hash 551869473, now seen corresponding path program 3 times [2024-11-13 14:01:15,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:01:15,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951168443] [2024-11-13 14:01:15,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:01:15,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:01:15,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:01:15,993 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:01:15,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:01:15,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951168443] [2024-11-13 14:01:15,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951168443] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:01:15,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754720888] [2024-11-13 14:01:15,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 14:01:15,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:01:15,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:01:15,995 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:01:15,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-13 14:01:16,091 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-13 14:01:16,092 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:01:16,093 INFO L255 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-13 14:01:16,094 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:01:16,232 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 14:01:16,232 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 14:01:16,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754720888] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:01:16,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 14:01:16,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 13 [2024-11-13 14:01:16,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056220485] [2024-11-13 14:01:16,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:01:16,233 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 14:01:16,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:01:16,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 14:01:16,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2024-11-13 14:01:16,270 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-11-13 14:01:16,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 73 transitions, 468 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 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 14:01:16,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:01:16,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-11-13 14:01:16,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:01:16,545 INFO L124 PetriNetUnfolderBase]: 529/1297 cut-off events. [2024-11-13 14:01:16,545 INFO L125 PetriNetUnfolderBase]: For 2742/2774 co-relation queries the response was YES. [2024-11-13 14:01:16,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4312 conditions, 1297 events. 529/1297 cut-off events. For 2742/2774 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 8192 event pairs, 62 based on Foata normal form. 34/1328 useless extension candidates. Maximal degree in co-relation 4289. Up to 402 conditions per place. [2024-11-13 14:01:16,552 INFO L140 encePairwiseOnDemand]: 38/44 looper letters, 78 selfloop transitions, 13 changer transitions 0/103 dead transitions. [2024-11-13 14:01:16,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 103 transitions, 792 flow [2024-11-13 14:01:16,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 14:01:16,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-13 14:01:16,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-11-13 14:01:16,555 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5363636363636364 [2024-11-13 14:01:16,555 INFO L175 Difference]: Start difference. First operand has 102 places, 73 transitions, 468 flow. Second operand 5 states and 118 transitions. [2024-11-13 14:01:16,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 103 transitions, 792 flow [2024-11-13 14:01:16,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 103 transitions, 764 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-13 14:01:16,567 INFO L231 Difference]: Finished difference. Result has 101 places, 74 transitions, 488 flow [2024-11-13 14:01:16,568 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=440, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=488, PETRI_PLACES=101, PETRI_TRANSITIONS=74} [2024-11-13 14:01:16,568 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 58 predicate places. [2024-11-13 14:01:16,568 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 74 transitions, 488 flow [2024-11-13 14:01:16,569 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 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 14:01:16,569 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:01:16,569 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:01:16,594 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-13 14:01:16,769 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-13 14:01:16,770 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2024-11-13 14:01:16,770 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:01:16,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1531863297, now seen corresponding path program 2 times [2024-11-13 14:01:16,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:01:16,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086245920] [2024-11-13 14:01:16,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:01:16,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:01:16,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:01:17,774 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:01:17,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:01:17,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086245920] [2024-11-13 14:01:17,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086245920] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:01:17,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914803568] [2024-11-13 14:01:17,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 14:01:17,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:01:17,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:01:17,778 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:01:17,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-13 14:01:17,883 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-13 14:01:17,883 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:01:17,884 INFO L255 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-13 14:01:17,886 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:01:18,025 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 14:01:18,025 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 14:01:18,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914803568] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:01:18,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 14:01:18,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 13 [2024-11-13 14:01:18,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160582284] [2024-11-13 14:01:18,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:01:18,027 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 14:01:18,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:01:18,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 14:01:18,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2024-11-13 14:01:18,056 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-11-13 14:01:18,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 74 transitions, 488 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:01:18,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:01:18,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-11-13 14:01:18,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:01:18,303 INFO L124 PetriNetUnfolderBase]: 550/1334 cut-off events. [2024-11-13 14:01:18,303 INFO L125 PetriNetUnfolderBase]: For 3624/3632 co-relation queries the response was YES. [2024-11-13 14:01:18,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4646 conditions, 1334 events. 550/1334 cut-off events. For 3624/3632 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 8559 event pairs, 217 based on Foata normal form. 5/1312 useless extension candidates. Maximal degree in co-relation 4622. Up to 820 conditions per place. [2024-11-13 14:01:18,313 INFO L140 encePairwiseOnDemand]: 39/44 looper letters, 70 selfloop transitions, 7 changer transitions 2/91 dead transitions. [2024-11-13 14:01:18,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 91 transitions, 718 flow [2024-11-13 14:01:18,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 14:01:18,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-13 14:01:18,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 109 transitions. [2024-11-13 14:01:18,315 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4954545454545455 [2024-11-13 14:01:18,315 INFO L175 Difference]: Start difference. First operand has 101 places, 74 transitions, 488 flow. Second operand 5 states and 109 transitions. [2024-11-13 14:01:18,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 91 transitions, 718 flow [2024-11-13 14:01:18,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 91 transitions, 700 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-13 14:01:18,327 INFO L231 Difference]: Finished difference. Result has 103 places, 76 transitions, 510 flow [2024-11-13 14:01:18,328 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=470, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=510, PETRI_PLACES=103, PETRI_TRANSITIONS=76} [2024-11-13 14:01:18,328 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 60 predicate places. [2024-11-13 14:01:18,328 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 76 transitions, 510 flow [2024-11-13 14:01:18,329 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:01:18,329 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:01:18,329 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:01:18,353 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-13 14:01:18,529 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-13 14:01:18,530 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2024-11-13 14:01:18,530 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:01:18,531 INFO L85 PathProgramCache]: Analyzing trace with hash 528898626, now seen corresponding path program 2 times [2024-11-13 14:01:18,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:01:18,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356947322] [2024-11-13 14:01:18,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:01:18,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:01:18,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:01:19,354 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:01:19,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:01:19,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356947322] [2024-11-13 14:01:19,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356947322] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:01:19,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843567427] [2024-11-13 14:01:19,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 14:01:19,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:01:19,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:01:19,358 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:01:19,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-13 14:01:19,461 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-13 14:01:19,461 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:01:19,462 INFO L255 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-13 14:01:19,464 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:01:19,602 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 14:01:19,602 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 14:01:19,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843567427] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:01:19,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 14:01:19,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 13 [2024-11-13 14:01:19,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384046031] [2024-11-13 14:01:19,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:01:19,603 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 14:01:19,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:01:19,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 14:01:19,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2024-11-13 14:01:19,628 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-11-13 14:01:19,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 76 transitions, 510 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 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 14:01:19,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:01:19,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-11-13 14:01:19,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:01:19,942 INFO L124 PetriNetUnfolderBase]: 561/1328 cut-off events. [2024-11-13 14:01:19,942 INFO L125 PetriNetUnfolderBase]: For 3671/3703 co-relation queries the response was YES. [2024-11-13 14:01:19,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4610 conditions, 1328 events. 561/1328 cut-off events. For 3671/3703 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 8229 event pairs, 77 based on Foata normal form. 34/1349 useless extension candidates. Maximal degree in co-relation 4585. Up to 595 conditions per place. [2024-11-13 14:01:19,952 INFO L140 encePairwiseOnDemand]: 38/44 looper letters, 80 selfloop transitions, 12 changer transitions 0/105 dead transitions. [2024-11-13 14:01:19,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 105 transitions, 828 flow [2024-11-13 14:01:19,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 14:01:19,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-13 14:01:19,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 116 transitions. [2024-11-13 14:01:19,954 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5272727272727272 [2024-11-13 14:01:19,954 INFO L175 Difference]: Start difference. First operand has 103 places, 76 transitions, 510 flow. Second operand 5 states and 116 transitions. [2024-11-13 14:01:19,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 105 transitions, 828 flow [2024-11-13 14:01:19,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 105 transitions, 813 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-11-13 14:01:19,967 INFO L231 Difference]: Finished difference. Result has 107 places, 77 transitions, 536 flow [2024-11-13 14:01:19,967 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=495, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=536, PETRI_PLACES=107, PETRI_TRANSITIONS=77} [2024-11-13 14:01:19,968 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 64 predicate places. [2024-11-13 14:01:19,968 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 77 transitions, 536 flow [2024-11-13 14:01:19,968 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 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 14:01:19,969 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:01:19,969 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:01:19,993 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-13 14:01:20,169 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-13 14:01:20,170 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2024-11-13 14:01:20,170 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:01:20,170 INFO L85 PathProgramCache]: Analyzing trace with hash 235972680, now seen corresponding path program 2 times [2024-11-13 14:01:20,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:01:20,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682794972] [2024-11-13 14:01:20,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:01:20,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:01:20,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:01:21,097 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:01:21,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:01:21,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682794972] [2024-11-13 14:01:21,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682794972] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:01:21,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888678793] [2024-11-13 14:01:21,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 14:01:21,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:01:21,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:01:21,101 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:01:21,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-13 14:01:21,207 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-13 14:01:21,208 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:01:21,209 INFO L255 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-13 14:01:21,211 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:01:21,358 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 14:01:21,359 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 14:01:21,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888678793] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:01:21,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 14:01:21,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 13 [2024-11-13 14:01:21,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735806189] [2024-11-13 14:01:21,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:01:21,360 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 14:01:21,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:01:21,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 14:01:21,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2024-11-13 14:01:21,391 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-11-13 14:01:21,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 77 transitions, 536 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:01:21,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:01:21,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-11-13 14:01:21,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:01:21,643 INFO L124 PetriNetUnfolderBase]: 556/1319 cut-off events. [2024-11-13 14:01:21,643 INFO L125 PetriNetUnfolderBase]: For 4260/4266 co-relation queries the response was YES. [2024-11-13 14:01:21,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4748 conditions, 1319 events. 556/1319 cut-off events. For 4260/4266 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 8272 event pairs, 221 based on Foata normal form. 5/1293 useless extension candidates. Maximal degree in co-relation 4721. Up to 834 conditions per place. [2024-11-13 14:01:21,653 INFO L140 encePairwiseOnDemand]: 39/44 looper letters, 70 selfloop transitions, 7 changer transitions 2/92 dead transitions. [2024-11-13 14:01:21,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 92 transitions, 748 flow [2024-11-13 14:01:21,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 14:01:21,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-13 14:01:21,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 109 transitions. [2024-11-13 14:01:21,655 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4954545454545455 [2024-11-13 14:01:21,655 INFO L175 Difference]: Start difference. First operand has 107 places, 77 transitions, 536 flow. Second operand 5 states and 109 transitions. [2024-11-13 14:01:21,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 92 transitions, 748 flow [2024-11-13 14:01:21,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 92 transitions, 727 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-11-13 14:01:21,671 INFO L231 Difference]: Finished difference. Result has 108 places, 77 transitions, 533 flow [2024-11-13 14:01:21,671 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=515, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=533, PETRI_PLACES=108, PETRI_TRANSITIONS=77} [2024-11-13 14:01:21,672 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 65 predicate places. [2024-11-13 14:01:21,672 INFO L471 AbstractCegarLoop]: Abstraction has has 108 places, 77 transitions, 533 flow [2024-11-13 14:01:21,672 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:01:21,672 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:01:21,673 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:01:21,697 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-13 14:01:21,873 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-13 14:01:21,873 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2024-11-13 14:01:21,874 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:01:21,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1718264716, now seen corresponding path program 2 times [2024-11-13 14:01:21,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:01:21,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752714829] [2024-11-13 14:01:21,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:01:21,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:01:21,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:01:21,958 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 14:01:21,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:01:21,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752714829] [2024-11-13 14:01:21,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752714829] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:01:21,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925053381] [2024-11-13 14:01:21,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 14:01:21,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:01:21,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:01:21,961 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:01:21,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-13 14:01:22,070 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 14:01:22,070 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:01:22,072 INFO L255 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-13 14:01:22,073 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:01:22,117 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 14:01:22,117 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 14:01:22,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925053381] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:01:22,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 14:01:22,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2024-11-13 14:01:22,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234134893] [2024-11-13 14:01:22,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:01:22,118 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 14:01:22,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:01:22,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 14:01:22,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-11-13 14:01:22,131 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-11-13 14:01:22,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 77 transitions, 533 flow. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 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 14:01:22,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:01:22,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-11-13 14:01:22,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:01:22,393 INFO L124 PetriNetUnfolderBase]: 606/1367 cut-off events. [2024-11-13 14:01:22,393 INFO L125 PetriNetUnfolderBase]: For 4336/4356 co-relation queries the response was YES. [2024-11-13 14:01:22,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5014 conditions, 1367 events. 606/1367 cut-off events. For 4336/4356 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 8481 event pairs, 162 based on Foata normal form. 34/1356 useless extension candidates. Maximal degree in co-relation 4987. Up to 388 conditions per place. [2024-11-13 14:01:22,402 INFO L140 encePairwiseOnDemand]: 39/44 looper letters, 102 selfloop transitions, 7 changer transitions 1/122 dead transitions. [2024-11-13 14:01:22,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 122 transitions, 1165 flow [2024-11-13 14:01:22,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 14:01:22,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-13 14:01:22,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 85 transitions. [2024-11-13 14:01:22,403 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48295454545454547 [2024-11-13 14:01:22,403 INFO L175 Difference]: Start difference. First operand has 108 places, 77 transitions, 533 flow. Second operand 4 states and 85 transitions. [2024-11-13 14:01:22,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 122 transitions, 1165 flow [2024-11-13 14:01:22,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 122 transitions, 1151 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-13 14:01:22,413 INFO L231 Difference]: Finished difference. Result has 106 places, 76 transitions, 529 flow [2024-11-13 14:01:22,414 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=515, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=529, PETRI_PLACES=106, PETRI_TRANSITIONS=76} [2024-11-13 14:01:22,414 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 63 predicate places. [2024-11-13 14:01:22,414 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 76 transitions, 529 flow [2024-11-13 14:01:22,414 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 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 14:01:22,415 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:01:22,415 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-13 14:01:22,434 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-13 14:01:22,615 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:01:22,616 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2024-11-13 14:01:22,616 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:01:22,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1726598086, now seen corresponding path program 1 times [2024-11-13 14:01:22,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:01:22,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221741343] [2024-11-13 14:01:22,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:01:22,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:01:22,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:01:22,699 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 14:01:22,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:01:22,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221741343] [2024-11-13 14:01:22,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221741343] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:01:22,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786919366] [2024-11-13 14:01:22,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:01:22,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:01:22,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:01:22,703 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:01:22,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-13 14:01:22,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:01:22,809 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-13 14:01:22,810 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:01:22,852 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 14:01:22,852 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:01:22,910 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 14:01:22,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786919366] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:01:22,910 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:01:22,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-11-13 14:01:22,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715060287] [2024-11-13 14:01:22,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:01:22,911 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-13 14:01:22,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:01:22,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-13 14:01:22,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-11-13 14:01:22,944 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-11-13 14:01:22,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 76 transitions, 529 flow. Second operand has 12 states, 12 states have (on average 14.916666666666666) internal successors, (179), 12 states have internal predecessors, (179), 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 14:01:22,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:01:22,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-11-13 14:01:22,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:01:23,459 INFO L124 PetriNetUnfolderBase]: 885/1885 cut-off events. [2024-11-13 14:01:23,459 INFO L125 PetriNetUnfolderBase]: For 5839/5885 co-relation queries the response was YES. [2024-11-13 14:01:23,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6970 conditions, 1885 events. 885/1885 cut-off events. For 5839/5885 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 11191 event pairs, 160 based on Foata normal form. 66/1932 useless extension candidates. Maximal degree in co-relation 6943. Up to 693 conditions per place. [2024-11-13 14:01:23,471 INFO L140 encePairwiseOnDemand]: 39/44 looper letters, 193 selfloop transitions, 13 changer transitions 0/219 dead transitions. [2024-11-13 14:01:23,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 219 transitions, 2110 flow [2024-11-13 14:01:23,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-13 14:01:23,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-13 14:01:23,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 226 transitions. [2024-11-13 14:01:23,472 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5136363636363637 [2024-11-13 14:01:23,473 INFO L175 Difference]: Start difference. First operand has 106 places, 76 transitions, 529 flow. Second operand 10 states and 226 transitions. [2024-11-13 14:01:23,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 219 transitions, 2110 flow [2024-11-13 14:01:23,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 219 transitions, 2078 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-13 14:01:23,489 INFO L231 Difference]: Finished difference. Result has 115 places, 85 transitions, 595 flow [2024-11-13 14:01:23,490 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=515, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=595, PETRI_PLACES=115, PETRI_TRANSITIONS=85} [2024-11-13 14:01:23,490 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 72 predicate places. [2024-11-13 14:01:23,490 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 85 transitions, 595 flow [2024-11-13 14:01:23,490 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 14.916666666666666) internal successors, (179), 12 states have internal predecessors, (179), 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 14:01:23,491 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:01:23,491 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:01:23,515 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-13 14:01:23,691 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:01:23,692 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2024-11-13 14:01:23,692 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:01:23,692 INFO L85 PathProgramCache]: Analyzing trace with hash 636824859, now seen corresponding path program 1 times [2024-11-13 14:01:23,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:01:23,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648315855] [2024-11-13 14:01:23,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:01:23,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:01:23,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:01:23,845 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:01:23,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:01:23,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648315855] [2024-11-13 14:01:23,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648315855] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:01:23,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145514494] [2024-11-13 14:01:23,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:01:23,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:01:23,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:01:23,849 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:01:23,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-13 14:01:23,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:01:23,966 INFO L255 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-13 14:01:23,969 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:01:24,037 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:01:24,037 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 14:01:24,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145514494] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:01:24,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 14:01:24,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2024-11-13 14:01:24,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51570494] [2024-11-13 14:01:24,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:01:24,038 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 14:01:24,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:01:24,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 14:01:24,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-13 14:01:24,039 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 44 [2024-11-13 14:01:24,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 85 transitions, 595 flow. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 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 14:01:24,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:01:24,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 44 [2024-11-13 14:01:24,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:01:24,402 INFO L124 PetriNetUnfolderBase]: 1094/2572 cut-off events. [2024-11-13 14:01:24,402 INFO L125 PetriNetUnfolderBase]: For 8919/9029 co-relation queries the response was YES. [2024-11-13 14:01:24,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9619 conditions, 2572 events. 1094/2572 cut-off events. For 8919/9029 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 16293 event pairs, 203 based on Foata normal form. 66/2612 useless extension candidates. Maximal degree in co-relation 9589. Up to 921 conditions per place. [2024-11-13 14:01:24,423 INFO L140 encePairwiseOnDemand]: 40/44 looper letters, 93 selfloop transitions, 15 changer transitions 15/133 dead transitions. [2024-11-13 14:01:24,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 133 transitions, 1117 flow [2024-11-13 14:01:24,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 14:01:24,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-13 14:01:24,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 108 transitions. [2024-11-13 14:01:24,424 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6136363636363636 [2024-11-13 14:01:24,425 INFO L175 Difference]: Start difference. First operand has 115 places, 85 transitions, 595 flow. Second operand 4 states and 108 transitions. [2024-11-13 14:01:24,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 133 transitions, 1117 flow [2024-11-13 14:01:24,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 133 transitions, 1022 flow, removed 35 selfloop flow, removed 8 redundant places. [2024-11-13 14:01:24,454 INFO L231 Difference]: Finished difference. Result has 107 places, 76 transitions, 555 flow [2024-11-13 14:01:24,454 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=466, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=555, PETRI_PLACES=107, PETRI_TRANSITIONS=76} [2024-11-13 14:01:24,455 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 64 predicate places. [2024-11-13 14:01:24,455 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 76 transitions, 555 flow [2024-11-13 14:01:24,455 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 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 14:01:24,455 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:01:24,455 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:01:24,480 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-13 14:01:24,655 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:01:24,656 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2024-11-13 14:01:24,657 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:01:24,657 INFO L85 PathProgramCache]: Analyzing trace with hash -328221397, now seen corresponding path program 1 times [2024-11-13 14:01:24,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:01:24,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113925856] [2024-11-13 14:01:24,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:01:24,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:01:24,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:01:25,653 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:01:25,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:01:25,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113925856] [2024-11-13 14:01:25,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113925856] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:01:25,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096503097] [2024-11-13 14:01:25,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:01:25,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:01:25,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:01:25,657 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:01:25,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-13 14:01:25,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:01:25,785 INFO L255 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-13 14:01:25,787 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:01:25,943 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 14:01:26,743 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 14:01:26,743 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 12 [2024-11-13 14:01:26,782 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:01:26,782 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:01:27,679 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 57 treesize of output 51 [2024-11-13 14:01:27,699 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 14:01:27,699 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 107 treesize of output 93 [2024-11-13 14:01:28,287 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:01:28,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096503097] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:01:28,288 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:01:28,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 37 [2024-11-13 14:01:28,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315018736] [2024-11-13 14:01:28,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:01:28,288 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-13 14:01:28,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:01:28,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-13 14:01:28,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1311, Unknown=0, NotChecked=0, Total=1482 [2024-11-13 14:01:28,757 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-11-13 14:01:28,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 76 transitions, 555 flow. Second operand has 39 states, 39 states have (on average 10.564102564102564) internal successors, (412), 39 states have internal predecessors, (412), 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 14:01:28,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:01:28,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-11-13 14:01:28,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:01:47,428 INFO L124 PetriNetUnfolderBase]: 7421/14704 cut-off events. [2024-11-13 14:01:47,429 INFO L125 PetriNetUnfolderBase]: For 61204/61974 co-relation queries the response was YES. [2024-11-13 14:01:47,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55151 conditions, 14704 events. 7421/14704 cut-off events. For 61204/61974 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 119981 event pairs, 572 based on Foata normal form. 590/15286 useless extension candidates. Maximal degree in co-relation 55123. Up to 2817 conditions per place. [2024-11-13 14:01:47,517 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 893 selfloop transitions, 219 changer transitions 27/1145 dead transitions. [2024-11-13 14:01:47,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 1145 transitions, 9422 flow [2024-11-13 14:01:47,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2024-11-13 14:01:47,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2024-11-13 14:01:47,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 1288 transitions. [2024-11-13 14:01:47,522 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3955773955773956 [2024-11-13 14:01:47,522 INFO L175 Difference]: Start difference. First operand has 107 places, 76 transitions, 555 flow. Second operand 74 states and 1288 transitions. [2024-11-13 14:01:47,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 1145 transitions, 9422 flow [2024-11-13 14:01:47,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 1145 transitions, 8988 flow, removed 205 selfloop flow, removed 6 redundant places. [2024-11-13 14:01:47,867 INFO L231 Difference]: Finished difference. Result has 201 places, 322 transitions, 4106 flow [2024-11-13 14:01:47,868 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=504, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=74, PETRI_FLOW=4106, PETRI_PLACES=201, PETRI_TRANSITIONS=322} [2024-11-13 14:01:47,868 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 158 predicate places. [2024-11-13 14:01:47,868 INFO L471 AbstractCegarLoop]: Abstraction has has 201 places, 322 transitions, 4106 flow [2024-11-13 14:01:47,868 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 10.564102564102564) internal successors, (412), 39 states have internal predecessors, (412), 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 14:01:47,868 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:01:47,868 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:01:47,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-13 14:01:48,069 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-13 14:01:48,069 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2024-11-13 14:01:48,069 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:01:48,069 INFO L85 PathProgramCache]: Analyzing trace with hash -190051153, now seen corresponding path program 2 times [2024-11-13 14:01:48,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:01:48,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880050948] [2024-11-13 14:01:48,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:01:48,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:01:48,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:01:49,268 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:01:49,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:01:49,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880050948] [2024-11-13 14:01:49,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880050948] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:01:49,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862343894] [2024-11-13 14:01:49,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 14:01:49,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:01:49,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:01:49,272 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:01:49,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-13 14:01:49,405 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 14:01:49,405 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:01:49,407 INFO L255 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-13 14:01:49,411 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:01:49,559 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-13 14:01:50,065 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-13 14:01:50,065 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2024-11-13 14:01:50,099 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:01:50,099 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:01:51,091 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 37 [2024-11-13 14:01:51,107 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-11-13 14:01:51,108 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 47 [2024-11-13 14:01:51,383 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:01:51,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862343894] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:01:51,384 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:01:51,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 37 [2024-11-13 14:01:51,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105623799] [2024-11-13 14:01:51,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:01:51,385 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-13 14:01:51,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:01:51,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-13 14:01:51,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1282, Unknown=0, NotChecked=0, Total=1482 [2024-11-13 14:01:51,763 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-11-13 14:01:51,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 322 transitions, 4106 flow. Second operand has 39 states, 39 states have (on average 10.564102564102564) internal successors, (412), 39 states have internal predecessors, (412), 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 14:01:51,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:01:51,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-11-13 14:01:51,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:01:57,945 INFO L124 PetriNetUnfolderBase]: 5603/11372 cut-off events. [2024-11-13 14:01:57,945 INFO L125 PetriNetUnfolderBase]: For 143000/143628 co-relation queries the response was YES. [2024-11-13 14:01:58,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54898 conditions, 11372 events. 5603/11372 cut-off events. For 143000/143628 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 91835 event pairs, 1192 based on Foata normal form. 654/11992 useless extension candidates. Maximal degree in co-relation 54831. Up to 2990 conditions per place. [2024-11-13 14:01:58,065 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 500 selfloop transitions, 122 changer transitions 12/640 dead transitions. [2024-11-13 14:01:58,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 640 transitions, 6416 flow [2024-11-13 14:01:58,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-13 14:01:58,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2024-11-13 14:01:58,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 621 transitions. [2024-11-13 14:01:58,068 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3714114832535885 [2024-11-13 14:01:58,068 INFO L175 Difference]: Start difference. First operand has 201 places, 322 transitions, 4106 flow. Second operand 38 states and 621 transitions. [2024-11-13 14:01:58,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 640 transitions, 6416 flow [2024-11-13 14:01:59,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 640 transitions, 5720 flow, removed 334 selfloop flow, removed 18 redundant places. [2024-11-13 14:01:59,143 INFO L231 Difference]: Finished difference. Result has 221 places, 248 transitions, 3035 flow [2024-11-13 14:01:59,143 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2226, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=3035, PETRI_PLACES=221, PETRI_TRANSITIONS=248} [2024-11-13 14:01:59,144 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 178 predicate places. [2024-11-13 14:01:59,144 INFO L471 AbstractCegarLoop]: Abstraction has has 221 places, 248 transitions, 3035 flow [2024-11-13 14:01:59,145 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 10.564102564102564) internal successors, (412), 39 states have internal predecessors, (412), 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 14:01:59,145 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:01:59,145 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:01:59,170 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-13 14:01:59,349 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-13 14:01:59,349 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2024-11-13 14:01:59,349 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:01:59,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1926980947, now seen corresponding path program 3 times [2024-11-13 14:01:59,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:01:59,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634260972] [2024-11-13 14:01:59,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:01:59,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:01:59,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:02:00,536 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:02:00,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:02:00,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634260972] [2024-11-13 14:02:00,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634260972] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:02:00,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019985544] [2024-11-13 14:02:00,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 14:02:00,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:02:00,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:02:00,540 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:02:00,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-13 14:02:00,665 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-13 14:02:00,665 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:02:00,667 INFO L255 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-13 14:02:00,669 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:02:01,128 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 14:02:01,128 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:02:01,671 INFO L349 Elim1Store]: treesize reduction 13, result has 64.9 percent of original size [2024-11-13 14:02:01,671 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 102 treesize of output 57 [2024-11-13 14:02:01,711 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 14:02:01,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019985544] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:02:01,712 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:02:01,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 28 [2024-11-13 14:02:01,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092289124] [2024-11-13 14:02:01,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:02:01,712 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-13 14:02:01,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:02:01,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-13 14:02:01,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2024-11-13 14:02:01,856 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-11-13 14:02:01,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 248 transitions, 3035 flow. Second operand has 30 states, 30 states have (on average 9.7) internal successors, (291), 30 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:02:01,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:02:01,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-11-13 14:02:01,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:02:11,840 INFO L124 PetriNetUnfolderBase]: 10500/19961 cut-off events. [2024-11-13 14:02:11,840 INFO L125 PetriNetUnfolderBase]: For 164549/164787 co-relation queries the response was YES. [2024-11-13 14:02:12,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90194 conditions, 19961 events. 10500/19961 cut-off events. For 164549/164787 co-relation queries the response was YES. Maximal size of possible extension queue 609. Compared 166136 event pairs, 472 based on Foata normal form. 246/20206 useless extension candidates. Maximal degree in co-relation 90124. Up to 3360 conditions per place. [2024-11-13 14:02:12,065 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 802 selfloop transitions, 299 changer transitions 44/1150 dead transitions. [2024-11-13 14:02:12,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 1150 transitions, 11940 flow [2024-11-13 14:02:12,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2024-11-13 14:02:12,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2024-11-13 14:02:12,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 1120 transitions. [2024-11-13 14:02:12,068 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3689064558629776 [2024-11-13 14:02:12,069 INFO L175 Difference]: Start difference. First operand has 221 places, 248 transitions, 3035 flow. Second operand 69 states and 1120 transitions. [2024-11-13 14:02:12,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 1150 transitions, 11940 flow [2024-11-13 14:02:14,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 1150 transitions, 11294 flow, removed 258 selfloop flow, removed 22 redundant places. [2024-11-13 14:02:14,704 INFO L231 Difference]: Finished difference. Result has 296 places, 415 transitions, 6310 flow [2024-11-13 14:02:14,704 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2727, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=69, PETRI_FLOW=6310, PETRI_PLACES=296, PETRI_TRANSITIONS=415} [2024-11-13 14:02:14,705 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 253 predicate places. [2024-11-13 14:02:14,705 INFO L471 AbstractCegarLoop]: Abstraction has has 296 places, 415 transitions, 6310 flow [2024-11-13 14:02:14,705 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 9.7) internal successors, (291), 30 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:02:14,705 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:02:14,705 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:02:14,729 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-13 14:02:14,906 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:02:14,906 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2024-11-13 14:02:14,906 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:02:14,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1297526745, now seen corresponding path program 4 times [2024-11-13 14:02:14,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:02:14,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471764563] [2024-11-13 14:02:14,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:02:14,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:02:14,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:02:15,664 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:02:15,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:02:15,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471764563] [2024-11-13 14:02:15,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471764563] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:02:15,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251704738] [2024-11-13 14:02:15,664 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 14:02:15,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:02:15,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:02:15,668 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:02:15,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-13 14:02:15,791 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 14:02:15,791 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:02:15,793 INFO L255 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-13 14:02:15,795 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:02:16,432 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:02:16,432 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:02:16,782 INFO L349 Elim1Store]: treesize reduction 13, result has 64.9 percent of original size [2024-11-13 14:02:16,782 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 38 [2024-11-13 14:02:17,215 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:02:17,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251704738] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:02:17,216 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:02:17,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 36 [2024-11-13 14:02:17,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055890414] [2024-11-13 14:02:17,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:02:17,216 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-13 14:02:17,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:02:17,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-13 14:02:17,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1228, Unknown=0, NotChecked=0, Total=1406 [2024-11-13 14:02:17,561 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-11-13 14:02:17,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 415 transitions, 6310 flow. Second operand has 38 states, 38 states have (on average 10.578947368421053) internal successors, (402), 38 states have internal predecessors, (402), 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 14:02:17,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:02:17,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-11-13 14:02:17,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:02:26,802 INFO L124 PetriNetUnfolderBase]: 8948/18173 cut-off events. [2024-11-13 14:02:26,802 INFO L125 PetriNetUnfolderBase]: For 186785/187205 co-relation queries the response was YES. [2024-11-13 14:02:26,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94601 conditions, 18173 events. 8948/18173 cut-off events. For 186785/187205 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 159260 event pairs, 643 based on Foata normal form. 241/18324 useless extension candidates. Maximal degree in co-relation 94508. Up to 4572 conditions per place. [2024-11-13 14:02:27,046 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 685 selfloop transitions, 213 changer transitions 0/908 dead transitions. [2024-11-13 14:02:27,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 908 transitions, 11108 flow [2024-11-13 14:02:27,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-11-13 14:02:27,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2024-11-13 14:02:27,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 836 transitions. [2024-11-13 14:02:27,049 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.36538461538461536 [2024-11-13 14:02:27,049 INFO L175 Difference]: Start difference. First operand has 296 places, 415 transitions, 6310 flow. Second operand 52 states and 836 transitions. [2024-11-13 14:02:27,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 908 transitions, 11108 flow [2024-11-13 14:02:29,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 908 transitions, 10153 flow, removed 405 selfloop flow, removed 13 redundant places. [2024-11-13 14:02:29,664 INFO L231 Difference]: Finished difference. Result has 346 places, 445 transitions, 6646 flow [2024-11-13 14:02:29,665 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5270, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=6646, PETRI_PLACES=346, PETRI_TRANSITIONS=445} [2024-11-13 14:02:29,671 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 303 predicate places. [2024-11-13 14:02:29,671 INFO L471 AbstractCegarLoop]: Abstraction has has 346 places, 445 transitions, 6646 flow [2024-11-13 14:02:29,671 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 10.578947368421053) internal successors, (402), 38 states have internal predecessors, (402), 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 14:02:29,671 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:02:29,671 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:02:29,722 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-13 14:02:29,872 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:02:29,872 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2024-11-13 14:02:29,872 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:02:29,873 INFO L85 PathProgramCache]: Analyzing trace with hash -559770932, now seen corresponding path program 1 times [2024-11-13 14:02:29,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:02:29,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596827186] [2024-11-13 14:02:29,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:02:29,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:02:29,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:02:30,591 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:02:30,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:02:30,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596827186] [2024-11-13 14:02:30,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596827186] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:02:30,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868132054] [2024-11-13 14:02:30,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:02:30,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:02:30,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:02:30,594 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:02:30,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-13 14:02:30,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:02:30,713 INFO L255 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-13 14:02:30,715 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:02:31,393 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 14:02:31,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 14:02:31,398 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 14:02:31,399 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 30 treesize of output 13 [2024-11-13 14:02:31,434 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:02:31,434 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:02:31,893 INFO L349 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2024-11-13 14:02:31,894 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 42 [2024-11-13 14:02:32,500 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:02:32,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868132054] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:02:32,501 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:02:32,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 35 [2024-11-13 14:02:32,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106752995] [2024-11-13 14:02:32,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:02:32,501 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-13 14:02:32,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:02:32,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-13 14:02:32,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1137, Unknown=0, NotChecked=0, Total=1332 [2024-11-13 14:02:32,825 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-11-13 14:02:32,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 445 transitions, 6646 flow. Second operand has 37 states, 37 states have (on average 10.702702702702704) internal successors, (396), 37 states have internal predecessors, (396), 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 14:02:32,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:02:32,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-11-13 14:02:32,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:02:41,087 INFO L124 PetriNetUnfolderBase]: 9763/19843 cut-off events. [2024-11-13 14:02:41,087 INFO L125 PetriNetUnfolderBase]: For 186715/187022 co-relation queries the response was YES. [2024-11-13 14:02:41,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100737 conditions, 19843 events. 9763/19843 cut-off events. For 186715/187022 co-relation queries the response was YES. Maximal size of possible extension queue 664. Compared 176970 event pairs, 1908 based on Foata normal form. 158/19942 useless extension candidates. Maximal degree in co-relation 100634. Up to 8624 conditions per place. [2024-11-13 14:02:41,384 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 480 selfloop transitions, 121 changer transitions 61/717 dead transitions. [2024-11-13 14:02:41,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 717 transitions, 9411 flow [2024-11-13 14:02:41,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-13 14:02:41,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-11-13 14:02:41,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 499 transitions. [2024-11-13 14:02:41,386 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3544034090909091 [2024-11-13 14:02:41,386 INFO L175 Difference]: Start difference. First operand has 346 places, 445 transitions, 6646 flow. Second operand 32 states and 499 transitions. [2024-11-13 14:02:41,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 717 transitions, 9411 flow [2024-11-13 14:02:43,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 717 transitions, 9211 flow, removed 73 selfloop flow, removed 12 redundant places. [2024-11-13 14:02:43,731 INFO L231 Difference]: Finished difference. Result has 369 places, 418 transitions, 6416 flow [2024-11-13 14:02:43,731 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6433, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=6416, PETRI_PLACES=369, PETRI_TRANSITIONS=418} [2024-11-13 14:02:43,732 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 326 predicate places. [2024-11-13 14:02:43,732 INFO L471 AbstractCegarLoop]: Abstraction has has 369 places, 418 transitions, 6416 flow [2024-11-13 14:02:43,732 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 10.702702702702704) internal successors, (396), 37 states have internal predecessors, (396), 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 14:02:43,732 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:02:43,732 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:02:43,749 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-13 14:02:43,933 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-13 14:02:43,933 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2024-11-13 14:02:43,934 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:02:43,934 INFO L85 PathProgramCache]: Analyzing trace with hash 294222762, now seen corresponding path program 1 times [2024-11-13 14:02:43,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:02:43,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707638732] [2024-11-13 14:02:43,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:02:43,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:02:43,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:02:44,716 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:02:44,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:02:44,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707638732] [2024-11-13 14:02:44,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707638732] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:02:44,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660587075] [2024-11-13 14:02:44,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:02:44,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:02:44,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:02:44,718 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:02:44,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-13 14:02:44,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:02:44,837 INFO L255 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-13 14:02:44,839 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:02:45,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 14:02:45,485 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 14:02:45,488 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 14:02:45,489 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 30 treesize of output 13 [2024-11-13 14:02:45,520 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:02:45,521 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:02:46,050 INFO L349 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2024-11-13 14:02:46,051 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 42 [2024-11-13 14:02:46,627 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:02:46,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660587075] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:02:46,627 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:02:46,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 37 [2024-11-13 14:02:46,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558318807] [2024-11-13 14:02:46,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:02:46,628 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-13 14:02:46,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:02:46,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-13 14:02:46,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=1251, Unknown=0, NotChecked=0, Total=1482 [2024-11-13 14:02:47,066 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-11-13 14:02:47,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 418 transitions, 6416 flow. Second operand has 39 states, 39 states have (on average 11.487179487179487) internal successors, (448), 39 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:02:47,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:02:47,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-11-13 14:02:47,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:02:55,778 INFO L124 PetriNetUnfolderBase]: 8248/18166 cut-off events. [2024-11-13 14:02:55,778 INFO L125 PetriNetUnfolderBase]: For 218920/219497 co-relation queries the response was YES. [2024-11-13 14:02:56,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101669 conditions, 18166 events. 8248/18166 cut-off events. For 218920/219497 co-relation queries the response was YES. Maximal size of possible extension queue 635. Compared 169094 event pairs, 693 based on Foata normal form. 414/18460 useless extension candidates. Maximal degree in co-relation 101562. Up to 5500 conditions per place. [2024-11-13 14:02:56,066 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 611 selfloop transitions, 207 changer transitions 46/919 dead transitions. [2024-11-13 14:02:56,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 919 transitions, 11470 flow [2024-11-13 14:02:56,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-11-13 14:02:56,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2024-11-13 14:02:56,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 778 transitions. [2024-11-13 14:02:56,068 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.37620889748549324 [2024-11-13 14:02:56,069 INFO L175 Difference]: Start difference. First operand has 369 places, 418 transitions, 6416 flow. Second operand 47 states and 778 transitions. [2024-11-13 14:02:56,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 919 transitions, 11470 flow [2024-11-13 14:02:58,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 919 transitions, 11161 flow, removed 51 selfloop flow, removed 33 redundant places. [2024-11-13 14:02:58,920 INFO L231 Difference]: Finished difference. Result has 377 places, 453 transitions, 7618 flow [2024-11-13 14:02:58,920 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6092, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=7618, PETRI_PLACES=377, PETRI_TRANSITIONS=453} [2024-11-13 14:02:58,921 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 334 predicate places. [2024-11-13 14:02:58,921 INFO L471 AbstractCegarLoop]: Abstraction has has 377 places, 453 transitions, 7618 flow [2024-11-13 14:02:58,921 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 11.487179487179487) internal successors, (448), 39 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:02:58,921 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:02:58,921 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:02:58,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-11-13 14:02:59,121 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-13 14:02:59,122 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2024-11-13 14:02:59,122 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:02:59,122 INFO L85 PathProgramCache]: Analyzing trace with hash -104691616, now seen corresponding path program 2 times [2024-11-13 14:02:59,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:02:59,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087826849] [2024-11-13 14:02:59,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:02:59,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:02:59,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:02:59,972 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:02:59,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:02:59,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087826849] [2024-11-13 14:02:59,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087826849] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:02:59,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985030193] [2024-11-13 14:02:59,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 14:02:59,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:02:59,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:02:59,976 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:02:59,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-13 14:03:00,093 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 14:03:00,093 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:03:00,095 INFO L255 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-13 14:03:00,097 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:03:00,203 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 14:03:00,709 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:03:00,709 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:03:01,736 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 76 treesize of output 68 [2024-11-13 14:03:01,787 INFO L349 Elim1Store]: treesize reduction 13, result has 64.9 percent of original size [2024-11-13 14:03:01,787 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 131 treesize of output 115 [2024-11-13 14:03:02,264 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:03:02,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985030193] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:03:02,264 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:03:02,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 37 [2024-11-13 14:03:02,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799356763] [2024-11-13 14:03:02,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:03:02,264 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-13 14:03:02,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:03:02,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-13 14:03:02,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1274, Unknown=0, NotChecked=0, Total=1482 [2024-11-13 14:03:02,673 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-11-13 14:03:02,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 453 transitions, 7618 flow. Second operand has 39 states, 39 states have (on average 11.487179487179487) internal successors, (448), 39 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:03:02,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:03:02,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-11-13 14:03:02,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:03:13,279 INFO L124 PetriNetUnfolderBase]: 8617/18858 cut-off events. [2024-11-13 14:03:13,279 INFO L125 PetriNetUnfolderBase]: For 260232/260913 co-relation queries the response was YES. [2024-11-13 14:03:13,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107722 conditions, 18858 events. 8617/18858 cut-off events. For 260232/260913 co-relation queries the response was YES. Maximal size of possible extension queue 671. Compared 176785 event pairs, 1465 based on Foata normal form. 362/19017 useless extension candidates. Maximal degree in co-relation 107609. Up to 6293 conditions per place. [2024-11-13 14:03:13,688 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 642 selfloop transitions, 155 changer transitions 0/852 dead transitions. [2024-11-13 14:03:13,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 852 transitions, 11976 flow [2024-11-13 14:03:13,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-11-13 14:03:13,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2024-11-13 14:03:13,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 741 transitions. [2024-11-13 14:03:13,691 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.36610671936758893 [2024-11-13 14:03:13,691 INFO L175 Difference]: Start difference. First operand has 377 places, 453 transitions, 7618 flow. Second operand 46 states and 741 transitions. [2024-11-13 14:03:13,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 852 transitions, 11976 flow [2024-11-13 14:03:17,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 852 transitions, 11379 flow, removed 159 selfloop flow, removed 29 redundant places. [2024-11-13 14:03:17,538 INFO L231 Difference]: Finished difference. Result has 395 places, 500 transitions, 8489 flow [2024-11-13 14:03:17,538 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7055, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=8489, PETRI_PLACES=395, PETRI_TRANSITIONS=500} [2024-11-13 14:03:17,539 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 352 predicate places. [2024-11-13 14:03:17,539 INFO L471 AbstractCegarLoop]: Abstraction has has 395 places, 500 transitions, 8489 flow [2024-11-13 14:03:17,539 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 11.487179487179487) internal successors, (448), 39 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:03:17,539 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:03:17,539 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:03:17,563 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-13 14:03:17,744 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-13 14:03:17,744 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2024-11-13 14:03:17,745 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:03:17,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1820111720, now seen corresponding path program 3 times [2024-11-13 14:03:17,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:03:17,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478187754] [2024-11-13 14:03:17,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:03:17,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:03:17,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:03:18,430 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:03:18,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:03:18,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478187754] [2024-11-13 14:03:18,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478187754] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:03:18,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210520377] [2024-11-13 14:03:18,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 14:03:18,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:03:18,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:03:18,432 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:03:18,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-13 14:03:18,531 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-13 14:03:18,531 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:03:18,532 INFO L255 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-13 14:03:18,534 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:03:18,854 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 14:03:18,854 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:03:19,111 INFO L349 Elim1Store]: treesize reduction 13, result has 64.9 percent of original size [2024-11-13 14:03:19,111 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 37 [2024-11-13 14:03:19,136 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 14:03:19,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210520377] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:03:19,136 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:03:19,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 7] total 27 [2024-11-13 14:03:19,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938293060] [2024-11-13 14:03:19,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:03:19,137 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-13 14:03:19,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:03:19,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-13 14:03:19,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2024-11-13 14:03:19,393 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-11-13 14:03:19,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 500 transitions, 8489 flow. Second operand has 29 states, 29 states have (on average 11.620689655172415) internal successors, (337), 29 states have internal predecessors, (337), 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 14:03:19,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:03:19,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-11-13 14:03:19,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:03:32,747 INFO L124 PetriNetUnfolderBase]: 12238/26459 cut-off events. [2024-11-13 14:03:32,747 INFO L125 PetriNetUnfolderBase]: For 381297/382018 co-relation queries the response was YES. [2024-11-13 14:03:33,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154534 conditions, 26459 events. 12238/26459 cut-off events. For 381297/382018 co-relation queries the response was YES. Maximal size of possible extension queue 935. Compared 258603 event pairs, 1307 based on Foata normal form. 398/26541 useless extension candidates. Maximal degree in co-relation 154411. Up to 5225 conditions per place. [2024-11-13 14:03:33,232 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 950 selfloop transitions, 352 changer transitions 16/1373 dead transitions. [2024-11-13 14:03:33,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 1373 transitions, 19817 flow [2024-11-13 14:03:33,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2024-11-13 14:03:33,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2024-11-13 14:03:33,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 1093 transitions. [2024-11-13 14:03:33,235 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38813920454545453 [2024-11-13 14:03:33,235 INFO L175 Difference]: Start difference. First operand has 395 places, 500 transitions, 8489 flow. Second operand 64 states and 1093 transitions. [2024-11-13 14:03:33,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 1373 transitions, 19817 flow [2024-11-13 14:03:39,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 1373 transitions, 19614 flow, removed 36 selfloop flow, removed 22 redundant places. [2024-11-13 14:03:39,817 INFO L231 Difference]: Finished difference. Result has 468 places, 690 transitions, 13384 flow [2024-11-13 14:03:39,818 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8370, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=500, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=13384, PETRI_PLACES=468, PETRI_TRANSITIONS=690} [2024-11-13 14:03:39,819 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 425 predicate places. [2024-11-13 14:03:39,819 INFO L471 AbstractCegarLoop]: Abstraction has has 468 places, 690 transitions, 13384 flow [2024-11-13 14:03:39,820 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 11.620689655172415) internal successors, (337), 29 states have internal predecessors, (337), 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 14:03:39,820 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:03:39,820 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:03:39,841 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-13 14:03:40,020 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-13 14:03:40,021 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2024-11-13 14:03:40,021 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:03:40,021 INFO L85 PathProgramCache]: Analyzing trace with hash -351896400, now seen corresponding path program 4 times [2024-11-13 14:03:40,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:03:40,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714053831] [2024-11-13 14:03:40,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:03:40,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:03:40,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:03:40,876 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:03:40,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:03:40,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714053831] [2024-11-13 14:03:40,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714053831] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:03:40,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876047850] [2024-11-13 14:03:40,877 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 14:03:40,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:03:40,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:03:40,883 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:03:40,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-13 14:03:41,090 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 14:03:41,091 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:03:41,092 INFO L255 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-13 14:03:41,094 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:03:41,867 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:03:41,867 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:03:42,211 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 14:03:42,211 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 51 [2024-11-13 14:03:42,819 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:03:42,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876047850] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:03:42,820 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:03:42,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 37 [2024-11-13 14:03:42,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024182996] [2024-11-13 14:03:42,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:03:42,824 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-13 14:03:42,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:03:42,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-13 14:03:42,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1284, Unknown=0, NotChecked=0, Total=1482 [2024-11-13 14:03:43,398 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-11-13 14:03:43,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 690 transitions, 13384 flow. Second operand has 39 states, 39 states have (on average 11.487179487179487) internal successors, (448), 39 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:03:43,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:03:43,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-11-13 14:03:43,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:03:57,075 INFO L124 PetriNetUnfolderBase]: 12223/26677 cut-off events. [2024-11-13 14:03:57,075 INFO L125 PetriNetUnfolderBase]: For 456929/457685 co-relation queries the response was YES. [2024-11-13 14:03:57,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164105 conditions, 26677 events. 12223/26677 cut-off events. For 456929/457685 co-relation queries the response was YES. Maximal size of possible extension queue 964. Compared 264128 event pairs, 1688 based on Foata normal form. 317/26737 useless extension candidates. Maximal degree in co-relation 163949. Up to 11365 conditions per place. [2024-11-13 14:03:57,774 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 704 selfloop transitions, 252 changer transitions 17/1026 dead transitions. [2024-11-13 14:03:57,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 1026 transitions, 17796 flow [2024-11-13 14:03:57,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-13 14:03:57,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2024-11-13 14:03:57,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 609 transitions. [2024-11-13 14:03:57,776 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3740786240786241 [2024-11-13 14:03:57,776 INFO L175 Difference]: Start difference. First operand has 468 places, 690 transitions, 13384 flow. Second operand 37 states and 609 transitions. [2024-11-13 14:03:57,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 1026 transitions, 17796 flow [2024-11-13 14:04:05,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 1026 transitions, 17506 flow, removed 120 selfloop flow, removed 12 redundant places. [2024-11-13 14:04:05,863 INFO L231 Difference]: Finished difference. Result has 495 places, 727 transitions, 14561 flow [2024-11-13 14:04:05,864 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=12978, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=682, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=14561, PETRI_PLACES=495, PETRI_TRANSITIONS=727} [2024-11-13 14:04:05,864 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 452 predicate places. [2024-11-13 14:04:05,865 INFO L471 AbstractCegarLoop]: Abstraction has has 495 places, 727 transitions, 14561 flow [2024-11-13 14:04:05,865 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 11.487179487179487) internal successors, (448), 39 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:04:05,865 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:04:05,865 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:04:05,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-11-13 14:04:06,070 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:04:06,070 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2024-11-13 14:04:06,070 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:04:06,070 INFO L85 PathProgramCache]: Analyzing trace with hash 708202376, now seen corresponding path program 2 times [2024-11-13 14:04:06,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:04:06,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319149613] [2024-11-13 14:04:06,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:04:06,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:04:06,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:04:06,533 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:04:06,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:04:06,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319149613] [2024-11-13 14:04:06,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319149613] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:04:06,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322630104] [2024-11-13 14:04:06,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 14:04:06,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:04:06,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:04:06,536 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:04:06,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-13 14:04:06,632 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 14:04:06,632 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:04:06,634 INFO L255 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-13 14:04:06,636 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:04:06,729 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 14:04:07,170 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:04:07,170 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:04:07,897 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 76 treesize of output 68 [2024-11-13 14:04:07,932 INFO L349 Elim1Store]: treesize reduction 13, result has 64.9 percent of original size [2024-11-13 14:04:07,933 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 131 treesize of output 115 [2024-11-13 14:04:08,282 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:04:08,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322630104] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:04:08,282 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:04:08,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 35 [2024-11-13 14:04:08,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780792777] [2024-11-13 14:04:08,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:04:08,283 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-13 14:04:08,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:04:08,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-13 14:04:08,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1160, Unknown=0, NotChecked=0, Total=1332 [2024-11-13 14:04:08,658 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-11-13 14:04:08,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 495 places, 727 transitions, 14561 flow. Second operand has 37 states, 37 states have (on average 10.702702702702704) internal successors, (396), 37 states have internal predecessors, (396), 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 14:04:08,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:04:08,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-11-13 14:04:08,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:04:23,928 INFO L124 PetriNetUnfolderBase]: 15479/31519 cut-off events. [2024-11-13 14:04:23,929 INFO L125 PetriNetUnfolderBase]: For 507332/507830 co-relation queries the response was YES. [2024-11-13 14:04:24,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 185937 conditions, 31519 events. 15479/31519 cut-off events. For 507332/507830 co-relation queries the response was YES. Maximal size of possible extension queue 1054. Compared 299687 event pairs, 4137 based on Foata normal form. 213/31566 useless extension candidates. Maximal degree in co-relation 185775. Up to 16067 conditions per place. [2024-11-13 14:04:24,615 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 687 selfloop transitions, 173 changer transitions 69/975 dead transitions. [2024-11-13 14:04:24,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 532 places, 975 transitions, 17907 flow [2024-11-13 14:04:24,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-11-13 14:04:24,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2024-11-13 14:04:24,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 628 transitions. [2024-11-13 14:04:24,618 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.33192389006342493 [2024-11-13 14:04:24,618 INFO L175 Difference]: Start difference. First operand has 495 places, 727 transitions, 14561 flow. Second operand 43 states and 628 transitions. [2024-11-13 14:04:24,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 532 places, 975 transitions, 17907 flow [2024-11-13 14:04:32,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 511 places, 975 transitions, 17641 flow, removed 26 selfloop flow, removed 21 redundant places. [2024-11-13 14:04:32,069 INFO L231 Difference]: Finished difference. Result has 520 places, 712 transitions, 14555 flow [2024-11-13 14:04:32,070 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=14285, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=726, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=553, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=14555, PETRI_PLACES=520, PETRI_TRANSITIONS=712} [2024-11-13 14:04:32,070 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 477 predicate places. [2024-11-13 14:04:32,070 INFO L471 AbstractCegarLoop]: Abstraction has has 520 places, 712 transitions, 14555 flow [2024-11-13 14:04:32,070 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 10.702702702702704) internal successors, (396), 37 states have internal predecessors, (396), 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 14:04:32,070 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:04:32,070 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:04:32,085 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-13 14:04:32,271 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:04:32,271 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2024-11-13 14:04:32,271 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:04:32,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1257773262, now seen corresponding path program 1 times [2024-11-13 14:04:32,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:04:32,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034129686] [2024-11-13 14:04:32,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:04:32,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:04:32,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:04:33,258 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:04:33,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:04:33,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034129686] [2024-11-13 14:04:33,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034129686] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:04:33,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19740889] [2024-11-13 14:04:33,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:04:33,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:04:33,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:04:33,260 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:04:33,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d163267-038f-482e-a090-3cf5335d8f3c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-13 14:04:33,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:04:33,357 INFO L255 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-13 14:04:33,358 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:04:33,772 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:04:33,772 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:04:34,293 INFO L349 Elim1Store]: treesize reduction 13, result has 64.9 percent of original size [2024-11-13 14:04:34,293 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 102 treesize of output 57 [2024-11-13 14:04:34,324 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 14:04:34,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19740889] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:04:34,325 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:04:34,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 8] total 33 [2024-11-13 14:04:34,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409128639] [2024-11-13 14:04:34,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:04:34,325 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-13 14:04:34,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:04:34,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-13 14:04:34,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1077, Unknown=0, NotChecked=0, Total=1190 [2024-11-13 14:04:34,550 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-11-13 14:04:34,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 520 places, 712 transitions, 14555 flow. Second operand has 35 states, 35 states have (on average 9.742857142857142) internal successors, (341), 35 states have internal predecessors, (341), 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 14:04:34,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:04:34,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-11-13 14:04:34,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:04:54,379 INFO L124 PetriNetUnfolderBase]: 18220/34575 cut-off events. [2024-11-13 14:04:54,380 INFO L125 PetriNetUnfolderBase]: For 536071/536513 co-relation queries the response was YES. [2024-11-13 14:04:55,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 208062 conditions, 34575 events. 18220/34575 cut-off events. For 536071/536513 co-relation queries the response was YES. Maximal size of possible extension queue 1069. Compared 310710 event pairs, 879 based on Foata normal form. 45/34616 useless extension candidates. Maximal degree in co-relation 207896. Up to 5826 conditions per place. [2024-11-13 14:04:55,255 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 657 selfloop transitions, 541 changer transitions 90/1293 dead transitions. [2024-11-13 14:04:55,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 550 places, 1293 transitions, 22540 flow [2024-11-13 14:04:55,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2024-11-13 14:04:55,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2024-11-13 14:04:55,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 884 transitions. [2024-11-13 14:04:55,258 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3405238828967643 [2024-11-13 14:04:55,258 INFO L175 Difference]: Start difference. First operand has 520 places, 712 transitions, 14555 flow. Second operand 59 states and 884 transitions. [2024-11-13 14:04:55,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 550 places, 1293 transitions, 22540 flow