./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB --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 bc55f480d2dabcba35697f502078f181c178ae095f610e1cdbc5d03f14d18670 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 03:59:20,750 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 03:59:20,863 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Overflow-32bit-Automizer_Default.epf [2024-11-28 03:59:20,872 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 03:59:20,875 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 03:59:20,918 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 03:59:20,920 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 03:59:20,921 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 03:59:20,921 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 03:59:20,922 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 03:59:20,923 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 03:59:20,924 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 03:59:20,924 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 03:59:20,925 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 03:59:20,925 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 03:59:20,925 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 03:59:20,926 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-28 03:59:20,926 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 03:59:20,926 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 03:59:20,927 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 03:59:20,927 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 03:59:20,927 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-28 03:59:20,927 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 03:59:20,927 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-28 03:59:20,927 INFO L153 SettingsManager]: * Check absence of signed integer overflows=ASSERTandASSUME [2024-11-28 03:59:20,927 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-28 03:59:20,927 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 03:59:20,928 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-28 03:59:20,928 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 03:59:20,928 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 03:59:20,928 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 03:59:20,928 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 03:59:20,928 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 03:59:20,928 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 03:59:20,928 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:59:20,928 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 03:59:20,929 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 03:59:20,929 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 03:59:20,929 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 03:59:20,929 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:59:20,929 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 03:59:20,929 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 03:59:20,929 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-28 03:59:20,929 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-28 03:59:20,929 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 03:59:20,930 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 03:59:20,930 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 03:59:20,930 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 03:59:20,932 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 03:59:20,932 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 03:59:20,932 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_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB 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 -> bc55f480d2dabcba35697f502078f181c178ae095f610e1cdbc5d03f14d18670 [2024-11-28 03:59:21,259 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 03:59:21,279 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 03:59:21,281 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 03:59:21,285 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 03:59:21,286 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 03:59:21,287 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c [2024-11-28 03:59:24,696 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/data/0d0b81906/d915778761824269afcc1170605cd622/FLAG8c8a9f0d6 [2024-11-28 03:59:25,046 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 03:59:25,047 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c [2024-11-28 03:59:25,059 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/data/0d0b81906/d915778761824269afcc1170605cd622/FLAG8c8a9f0d6 [2024-11-28 03:59:25,085 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/data/0d0b81906/d915778761824269afcc1170605cd622 [2024-11-28 03:59:25,088 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 03:59:25,090 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 03:59:25,092 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 03:59:25,093 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 03:59:25,098 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 03:59:25,099 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:59:25" (1/1) ... [2024-11-28 03:59:25,103 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45a17866 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:59:25, skipping insertion in model container [2024-11-28 03:59:25,103 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:59:25" (1/1) ... [2024-11-28 03:59:25,126 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 03:59:25,389 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 03:59:25,402 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 03:59:25,449 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 03:59:25,471 INFO L204 MainTranslator]: Completed translation [2024-11-28 03:59:25,472 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:59:25 WrapperNode [2024-11-28 03:59:25,472 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 03:59:25,473 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 03:59:25,474 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 03:59:25,474 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 03:59:25,489 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:59:25" (1/1) ... [2024-11-28 03:59:25,498 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:59:25" (1/1) ... [2024-11-28 03:59:25,540 INFO L138 Inliner]: procedures = 21, calls = 22, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 144 [2024-11-28 03:59:25,540 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 03:59:25,541 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 03:59:25,541 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 03:59:25,541 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 03:59:25,551 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:59:25" (1/1) ... [2024-11-28 03:59:25,552 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:59:25" (1/1) ... [2024-11-28 03:59:25,554 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:59:25" (1/1) ... [2024-11-28 03:59:25,581 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]. [2024-11-28 03:59:25,582 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:59:25" (1/1) ... [2024-11-28 03:59:25,583 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:59:25" (1/1) ... [2024-11-28 03:59:25,599 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:59:25" (1/1) ... [2024-11-28 03:59:25,600 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:59:25" (1/1) ... [2024-11-28 03:59:25,608 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:59:25" (1/1) ... [2024-11-28 03:59:25,612 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:59:25" (1/1) ... [2024-11-28 03:59:25,613 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:59:25" (1/1) ... [2024-11-28 03:59:25,619 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 03:59:25,624 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 03:59:25,624 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 03:59:25,624 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 03:59:25,625 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:59:25" (1/1) ... [2024-11-28 03:59:25,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:59:25,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:59:25,672 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 03:59:25,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 03:59:25,711 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 03:59:25,711 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-28 03:59:25,712 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-28 03:59:25,712 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-28 03:59:25,713 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-28 03:59:25,713 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-28 03:59:25,713 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-28 03:59:25,713 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-28 03:59:25,713 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-28 03:59:25,714 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-28 03:59:25,714 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 03:59:25,714 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 03:59:25,714 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-28 03:59:25,714 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-28 03:59:25,717 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-28 03:59:25,867 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 03:59:25,870 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 03:59:26,341 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-28 03:59:26,342 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 03:59:26,644 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 03:59:26,644 INFO L312 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-28 03:59:26,645 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:59:26 BoogieIcfgContainer [2024-11-28 03:59:26,645 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 03:59:26,648 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 03:59:26,648 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 03:59:26,654 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 03:59:26,654 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:59:25" (1/3) ... [2024-11-28 03:59:26,655 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@473953bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:59:26, skipping insertion in model container [2024-11-28 03:59:26,655 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:59:25" (2/3) ... [2024-11-28 03:59:26,656 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@473953bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:59:26, skipping insertion in model container [2024-11-28 03:59:26,656 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:59:26" (3/3) ... [2024-11-28 03:59:26,657 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-channel-sum.wvr.c [2024-11-28 03:59:26,676 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 03:59:26,678 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-channel-sum.wvr.c that has 3 procedures, 44 locations, 1 initial locations, 3 loop locations, and 10 error locations. [2024-11-28 03:59:26,678 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-28 03:59:26,773 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-28 03:59:26,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 48 transitions, 110 flow [2024-11-28 03:59:26,872 INFO L124 PetriNetUnfolderBase]: 5/46 cut-off events. [2024-11-28 03:59:26,876 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-28 03:59:26,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55 conditions, 46 events. 5/46 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 103 event pairs, 0 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 33. Up to 2 conditions per place. [2024-11-28 03:59:26,882 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 48 transitions, 110 flow [2024-11-28 03:59:26,889 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 46 places, 44 transitions, 97 flow [2024-11-28 03:59:26,908 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 03:59:26,931 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;@72af523d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 03:59:26,931 INFO L334 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2024-11-28 03:59:26,942 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-28 03:59:26,943 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2024-11-28 03:59:26,943 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-28 03:59:26,943 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:59:26,944 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:59:26,944 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2024-11-28 03:59:26,952 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:59:26,953 INFO L85 PathProgramCache]: Analyzing trace with hash -733152884, now seen corresponding path program 1 times [2024-11-28 03:59:26,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:59:26,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395181318] [2024-11-28 03:59:26,964 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:59:26,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:59:27,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:59:27,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:59:27,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:59:27,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395181318] [2024-11-28 03:59:27,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395181318] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:59:27,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:59:27,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 03:59:27,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379599636] [2024-11-28 03:59:27,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:59:27,314 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:59:27,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:59:27,352 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:59:27,353 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:59:27,378 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 48 [2024-11-28 03:59:27,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 44 transitions, 97 flow. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:59:27,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:59:27,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 48 [2024-11-28 03:59:27,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:59:27,788 INFO L124 PetriNetUnfolderBase]: 368/644 cut-off events. [2024-11-28 03:59:27,789 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2024-11-28 03:59:27,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1247 conditions, 644 events. 368/644 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 2985 event pairs, 277 based on Foata normal form. 1/420 useless extension candidates. Maximal degree in co-relation 1143. Up to 568 conditions per place. [2024-11-28 03:59:27,804 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 30 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2024-11-28 03:59:27,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 46 transitions, 169 flow [2024-11-28 03:59:27,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:59:27,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 03:59:27,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 93 transitions. [2024-11-28 03:59:27,824 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.484375 [2024-11-28 03:59:27,826 INFO L175 Difference]: Start difference. First operand has 46 places, 44 transitions, 97 flow. Second operand 4 states and 93 transitions. [2024-11-28 03:59:27,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 46 transitions, 169 flow [2024-11-28 03:59:27,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 46 transitions, 164 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-28 03:59:27,837 INFO L231 Difference]: Finished difference. Result has 48 places, 46 transitions, 119 flow [2024-11-28 03:59:27,841 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=43, 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=119, PETRI_PLACES=48, PETRI_TRANSITIONS=46} [2024-11-28 03:59:27,851 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 2 predicate places. [2024-11-28 03:59:27,852 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 46 transitions, 119 flow [2024-11-28 03:59:27,852 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:59:27,852 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:59:27,853 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:59:27,853 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-28 03:59:27,853 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2024-11-28 03:59:27,854 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:59:27,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1448412907, now seen corresponding path program 1 times [2024-11-28 03:59:27,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:59:27,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858308577] [2024-11-28 03:59:27,856 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:59:27,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:59:27,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:59:28,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:59:28,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:59:28,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858308577] [2024-11-28 03:59:28,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858308577] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:59:28,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094534829] [2024-11-28 03:59:28,217 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:59:28,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:59:28,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:59:28,220 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:59:28,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 03:59:28,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:59:28,357 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-28 03:59:28,361 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:59:28,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:59:28,444 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:59:28,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094534829] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:59:28,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 03:59:28,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2024-11-28 03:59:28,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602611994] [2024-11-28 03:59:28,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:59:28,446 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 03:59:28,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:59:28,449 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 03:59:28,449 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-28 03:59:28,467 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 48 [2024-11-28 03:59:28,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 46 transitions, 119 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) [2024-11-28 03:59:28,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:59:28,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 48 [2024-11-28 03:59:28,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:59:28,770 INFO L124 PetriNetUnfolderBase]: 368/643 cut-off events. [2024-11-28 03:59:28,770 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2024-11-28 03:59:28,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1242 conditions, 643 events. 368/643 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 3001 event pairs, 277 based on Foata normal form. 1/420 useless extension candidates. Maximal degree in co-relation 1215. Up to 563 conditions per place. [2024-11-28 03:59:28,781 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 26 selfloop transitions, 7 changer transitions 0/45 dead transitions. [2024-11-28 03:59:28,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 45 transitions, 181 flow [2024-11-28 03:59:28,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 03:59:28,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-28 03:59:28,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 118 transitions. [2024-11-28 03:59:28,785 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4097222222222222 [2024-11-28 03:59:28,785 INFO L175 Difference]: Start difference. First operand has 48 places, 46 transitions, 119 flow. Second operand 6 states and 118 transitions. [2024-11-28 03:59:28,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 45 transitions, 181 flow [2024-11-28 03:59:28,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 45 transitions, 178 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-28 03:59:28,789 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 126 flow [2024-11-28 03:59:28,790 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=126, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2024-11-28 03:59:28,790 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 5 predicate places. [2024-11-28 03:59:28,791 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 126 flow [2024-11-28 03:59:28,791 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) [2024-11-28 03:59:28,791 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:59:28,791 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:59:28,804 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-28 03:59:28,991 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:59:28,992 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2024-11-28 03:59:28,993 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:59:28,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1446283161, now seen corresponding path program 1 times [2024-11-28 03:59:28,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:59:28,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441632722] [2024-11-28 03:59:28,993 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:59:28,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:59:29,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:59:29,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:59:29,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:59:29,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441632722] [2024-11-28 03:59:29,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441632722] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:59:29,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:59:29,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 03:59:29,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103251159] [2024-11-28 03:59:29,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:59:29,099 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 03:59:29,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:59:29,100 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 03:59:29,100 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 03:59:29,104 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 48 [2024-11-28 03:59:29,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 126 flow. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:59:29,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:59:29,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 48 [2024-11-28 03:59:29,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:59:29,338 INFO L124 PetriNetUnfolderBase]: 364/661 cut-off events. [2024-11-28 03:59:29,338 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-11-28 03:59:29,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1304 conditions, 661 events. 364/661 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2946 event pairs, 160 based on Foata normal form. 0/431 useless extension candidates. Maximal degree in co-relation 1274. Up to 432 conditions per place. [2024-11-28 03:59:29,345 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 41 selfloop transitions, 6 changer transitions 2/60 dead transitions. [2024-11-28 03:59:29,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 60 transitions, 255 flow [2024-11-28 03:59:29,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 03:59:29,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 03:59:29,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 89 transitions. [2024-11-28 03:59:29,347 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6180555555555556 [2024-11-28 03:59:29,347 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 126 flow. Second operand 3 states and 89 transitions. [2024-11-28 03:59:29,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 60 transitions, 255 flow [2024-11-28 03:59:29,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 60 transitions, 233 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-11-28 03:59:29,352 INFO L231 Difference]: Finished difference. Result has 50 places, 48 transitions, 142 flow [2024-11-28 03:59:29,352 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=50, PETRI_TRANSITIONS=48} [2024-11-28 03:59:29,353 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 4 predicate places. [2024-11-28 03:59:29,353 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 48 transitions, 142 flow [2024-11-28 03:59:29,353 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:59:29,353 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:59:29,354 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:59:29,354 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-28 03:59:29,354 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2024-11-28 03:59:29,356 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:59:29,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1951126700, now seen corresponding path program 1 times [2024-11-28 03:59:29,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:59:29,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948100890] [2024-11-28 03:59:29,357 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:59:29,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:59:29,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:59:29,561 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:59:29,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:59:29,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948100890] [2024-11-28 03:59:29,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948100890] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:59:29,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208158043] [2024-11-28 03:59:29,561 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:59:29,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:59:29,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:59:29,567 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:59:29,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 03:59:29,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:59:29,656 INFO L256 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-28 03:59:29,657 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:59:29,701 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:59:29,701 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:59:29,768 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:59:29,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208158043] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:59:29,770 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:59:29,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-11-28 03:59:29,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707657078] [2024-11-28 03:59:29,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:59:29,771 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 03:59:29,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:59:29,771 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 03:59:29,771 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-11-28 03:59:29,795 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 48 [2024-11-28 03:59:29,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 48 transitions, 142 flow. Second operand has 12 states, 12 states have (on average 15.166666666666666) internal successors, (182), 12 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:59:29,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:59:29,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 48 [2024-11-28 03:59:29,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:59:30,129 INFO L124 PetriNetUnfolderBase]: 367/745 cut-off events. [2024-11-28 03:59:30,129 INFO L125 PetriNetUnfolderBase]: For 196/196 co-relation queries the response was YES. [2024-11-28 03:59:30,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1617 conditions, 745 events. 367/745 cut-off events. For 196/196 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3582 event pairs, 256 based on Foata normal form. 3/587 useless extension candidates. Maximal degree in co-relation 1566. Up to 618 conditions per place. [2024-11-28 03:59:30,136 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 32 selfloop transitions, 13 changer transitions 0/57 dead transitions. [2024-11-28 03:59:30,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 57 transitions, 262 flow [2024-11-28 03:59:30,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 03:59:30,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-28 03:59:30,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-11-28 03:59:30,139 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3854166666666667 [2024-11-28 03:59:30,139 INFO L175 Difference]: Start difference. First operand has 50 places, 48 transitions, 142 flow. Second operand 10 states and 185 transitions. [2024-11-28 03:59:30,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 57 transitions, 262 flow [2024-11-28 03:59:30,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 57 transitions, 250 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 03:59:30,147 INFO L231 Difference]: Finished difference. Result has 60 places, 57 transitions, 204 flow [2024-11-28 03:59:30,148 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=204, PETRI_PLACES=60, PETRI_TRANSITIONS=57} [2024-11-28 03:59:30,149 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 14 predicate places. [2024-11-28 03:59:30,149 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 57 transitions, 204 flow [2024-11-28 03:59:30,150 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 15.166666666666666) internal successors, (182), 12 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:59:30,150 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:59:30,150 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:59:30,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-28 03:59:30,351 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:59:30,351 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2024-11-28 03:59:30,352 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:59:30,352 INFO L85 PathProgramCache]: Analyzing trace with hash -267586006, now seen corresponding path program 1 times [2024-11-28 03:59:30,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:59:30,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281971202] [2024-11-28 03:59:30,352 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:59:30,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:59:30,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:59:30,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:59:30,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:59:30,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281971202] [2024-11-28 03:59:30,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281971202] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:59:30,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:59:30,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 03:59:30,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402674524] [2024-11-28 03:59:30,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:59:30,461 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 03:59:30,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:59:30,461 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 03:59:30,462 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 03:59:30,464 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 48 [2024-11-28 03:59:30,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 57 transitions, 204 flow. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:59:30,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:59:30,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 48 [2024-11-28 03:59:30,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:59:30,626 INFO L124 PetriNetUnfolderBase]: 315/590 cut-off events. [2024-11-28 03:59:30,626 INFO L125 PetriNetUnfolderBase]: For 106/106 co-relation queries the response was YES. [2024-11-28 03:59:30,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1323 conditions, 590 events. 315/590 cut-off events. For 106/106 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2677 event pairs, 112 based on Foata normal form. 0/447 useless extension candidates. Maximal degree in co-relation 1288. Up to 473 conditions per place. [2024-11-28 03:59:30,631 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 45 selfloop transitions, 3 changer transitions 2/62 dead transitions. [2024-11-28 03:59:30,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 62 transitions, 317 flow [2024-11-28 03:59:30,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 03:59:30,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 03:59:30,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 82 transitions. [2024-11-28 03:59:30,633 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5694444444444444 [2024-11-28 03:59:30,633 INFO L175 Difference]: Start difference. First operand has 60 places, 57 transitions, 204 flow. Second operand 3 states and 82 transitions. [2024-11-28 03:59:30,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 62 transitions, 317 flow [2024-11-28 03:59:30,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 62 transitions, 306 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-11-28 03:59:30,637 INFO L231 Difference]: Finished difference. Result has 59 places, 56 transitions, 202 flow [2024-11-28 03:59:30,637 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=202, PETRI_PLACES=59, PETRI_TRANSITIONS=56} [2024-11-28 03:59:30,638 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 13 predicate places. [2024-11-28 03:59:30,639 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 56 transitions, 202 flow [2024-11-28 03:59:30,639 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:59:30,639 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:59:30,639 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:59:30,639 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-28 03:59:30,639 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2024-11-28 03:59:30,640 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:59:30,640 INFO L85 PathProgramCache]: Analyzing trace with hash -267586005, now seen corresponding path program 1 times [2024-11-28 03:59:30,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:59:30,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96847759] [2024-11-28 03:59:30,641 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:59:30,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:59:30,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:59:30,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:59:30,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:59:30,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96847759] [2024-11-28 03:59:30,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96847759] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:59:30,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:59:30,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 03:59:30,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875492773] [2024-11-28 03:59:30,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:59:30,816 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:59:30,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:59:30,816 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:59:30,817 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:59:30,817 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 48 [2024-11-28 03:59:30,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 56 transitions, 202 flow. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:59:30,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:59:30,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 48 [2024-11-28 03:59:30,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:59:31,037 INFO L124 PetriNetUnfolderBase]: 337/659 cut-off events. [2024-11-28 03:59:31,038 INFO L125 PetriNetUnfolderBase]: For 122/122 co-relation queries the response was YES. [2024-11-28 03:59:31,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1487 conditions, 659 events. 337/659 cut-off events. For 122/122 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 3025 event pairs, 245 based on Foata normal form. 5/542 useless extension candidates. Maximal degree in co-relation 1452. Up to 538 conditions per place. [2024-11-28 03:59:31,046 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 39 selfloop transitions, 3 changer transitions 11/66 dead transitions. [2024-11-28 03:59:31,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 66 transitions, 334 flow [2024-11-28 03:59:31,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:59:31,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 03:59:31,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 105 transitions. [2024-11-28 03:59:31,050 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.546875 [2024-11-28 03:59:31,050 INFO L175 Difference]: Start difference. First operand has 59 places, 56 transitions, 202 flow. Second operand 4 states and 105 transitions. [2024-11-28 03:59:31,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 66 transitions, 334 flow [2024-11-28 03:59:31,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 66 transitions, 331 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-28 03:59:31,056 INFO L231 Difference]: Finished difference. Result has 62 places, 55 transitions, 206 flow [2024-11-28 03:59:31,056 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=206, PETRI_PLACES=62, PETRI_TRANSITIONS=55} [2024-11-28 03:59:31,057 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 16 predicate places. [2024-11-28 03:59:31,057 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 55 transitions, 206 flow [2024-11-28 03:59:31,057 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:59:31,057 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:59:31,057 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:59:31,057 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-28 03:59:31,058 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2024-11-28 03:59:31,059 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:59:31,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1421665662, now seen corresponding path program 1 times [2024-11-28 03:59:31,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:59:31,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245338515] [2024-11-28 03:59:31,059 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:59:31,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:59:31,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:59:31,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:59:31,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:59:31,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245338515] [2024-11-28 03:59:31,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245338515] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:59:31,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099149155] [2024-11-28 03:59:31,326 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:59:31,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:59:31,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:59:31,329 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:59:31,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 03:59:31,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:59:31,417 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-28 03:59:31,418 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:59:31,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:59:31,487 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:59:31,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099149155] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:59:31,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 03:59:31,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2024-11-28 03:59:31,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619202814] [2024-11-28 03:59:31,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:59:31,488 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:59:31,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:59:31,488 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:59:31,489 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-28 03:59:31,492 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 48 [2024-11-28 03:59:31,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 55 transitions, 206 flow. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:59:31,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:59:31,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 48 [2024-11-28 03:59:31,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:59:31,688 INFO L124 PetriNetUnfolderBase]: 255/504 cut-off events. [2024-11-28 03:59:31,689 INFO L125 PetriNetUnfolderBase]: For 99/99 co-relation queries the response was YES. [2024-11-28 03:59:31,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1149 conditions, 504 events. 255/504 cut-off events. For 99/99 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2189 event pairs, 107 based on Foata normal form. 40/439 useless extension candidates. Maximal degree in co-relation 1113. Up to 292 conditions per place. [2024-11-28 03:59:31,693 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 38 selfloop transitions, 8 changer transitions 4/62 dead transitions. [2024-11-28 03:59:31,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 62 transitions, 327 flow [2024-11-28 03:59:31,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:59:31,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 03:59:31,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 96 transitions. [2024-11-28 03:59:31,696 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-11-28 03:59:31,696 INFO L175 Difference]: Start difference. First operand has 62 places, 55 transitions, 206 flow. Second operand 4 states and 96 transitions. [2024-11-28 03:59:31,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 62 transitions, 327 flow [2024-11-28 03:59:31,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 62 transitions, 317 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-11-28 03:59:31,703 INFO L231 Difference]: Finished difference. Result has 59 places, 52 transitions, 204 flow [2024-11-28 03:59:31,703 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=204, PETRI_PLACES=59, PETRI_TRANSITIONS=52} [2024-11-28 03:59:31,704 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 13 predicate places. [2024-11-28 03:59:31,707 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 52 transitions, 204 flow [2024-11-28 03:59:31,707 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:59:31,707 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:59:31,707 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1] [2024-11-28 03:59:31,718 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-28 03:59:31,908 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:59:31,908 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2024-11-28 03:59:31,909 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:59:31,909 INFO L85 PathProgramCache]: Analyzing trace with hash 944392957, now seen corresponding path program 2 times [2024-11-28 03:59:31,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:59:31,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859693292] [2024-11-28 03:59:31,909 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:59:31,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:59:31,930 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 03:59:31,930 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:59:32,005 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-28 03:59:32,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:59:32,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859693292] [2024-11-28 03:59:32,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859693292] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:59:32,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359845127] [2024-11-28 03:59:32,006 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:59:32,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:59:32,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:59:32,012 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:59:32,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 03:59:32,090 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 03:59:32,091 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:59:32,092 INFO L256 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-28 03:59:32,094 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:59:32,146 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-28 03:59:32,147 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:59:32,196 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-28 03:59:32,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359845127] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:59:32,196 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:59:32,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2024-11-28 03:59:32,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937441376] [2024-11-28 03:59:32,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:59:32,197 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:59:32,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:59:32,197 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:59:32,197 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:59:32,204 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 48 [2024-11-28 03:59:32,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 52 transitions, 204 flow. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:59:32,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:59:32,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 48 [2024-11-28 03:59:32,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:59:32,361 INFO L124 PetriNetUnfolderBase]: 228/461 cut-off events. [2024-11-28 03:59:32,361 INFO L125 PetriNetUnfolderBase]: For 145/145 co-relation queries the response was YES. [2024-11-28 03:59:32,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1085 conditions, 461 events. 228/461 cut-off events. For 145/145 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1933 event pairs, 157 based on Foata normal form. 1/357 useless extension candidates. Maximal degree in co-relation 1054. Up to 387 conditions per place. [2024-11-28 03:59:32,364 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 24 selfloop transitions, 15 changer transitions 0/51 dead transitions. [2024-11-28 03:59:32,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 51 transitions, 272 flow [2024-11-28 03:59:32,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:59:32,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 03:59:32,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 82 transitions. [2024-11-28 03:59:32,366 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4270833333333333 [2024-11-28 03:59:32,366 INFO L175 Difference]: Start difference. First operand has 59 places, 52 transitions, 204 flow. Second operand 4 states and 82 transitions. [2024-11-28 03:59:32,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 51 transitions, 272 flow [2024-11-28 03:59:32,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 51 transitions, 246 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-11-28 03:59:32,371 INFO L231 Difference]: Finished difference. Result has 54 places, 51 transitions, 198 flow [2024-11-28 03:59:32,371 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=198, PETRI_PLACES=54, PETRI_TRANSITIONS=51} [2024-11-28 03:59:32,372 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 8 predicate places. [2024-11-28 03:59:32,372 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 51 transitions, 198 flow [2024-11-28 03:59:32,372 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:59:32,373 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:59:32,373 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:59:32,387 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-28 03:59:32,579 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:59:32,579 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2024-11-28 03:59:32,580 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:59:32,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1870301532, now seen corresponding path program 1 times [2024-11-28 03:59:32,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:59:32,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698362607] [2024-11-28 03:59:32,580 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:59:32,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:59:32,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:59:32,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:59:32,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:59:32,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698362607] [2024-11-28 03:59:32,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698362607] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:59:32,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:59:32,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 03:59:32,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681676390] [2024-11-28 03:59:32,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:59:32,675 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 03:59:32,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:59:32,676 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 03:59:32,676 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 03:59:32,682 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 48 [2024-11-28 03:59:32,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 51 transitions, 198 flow. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:59:32,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:59:32,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 48 [2024-11-28 03:59:32,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:59:32,843 INFO L124 PetriNetUnfolderBase]: 239/534 cut-off events. [2024-11-28 03:59:32,843 INFO L125 PetriNetUnfolderBase]: For 90/90 co-relation queries the response was YES. [2024-11-28 03:59:32,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1155 conditions, 534 events. 239/534 cut-off events. For 90/90 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2324 event pairs, 65 based on Foata normal form. 0/440 useless extension candidates. Maximal degree in co-relation 1070. Up to 273 conditions per place. [2024-11-28 03:59:32,847 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 48 selfloop transitions, 3 changer transitions 2/64 dead transitions. [2024-11-28 03:59:32,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 64 transitions, 345 flow [2024-11-28 03:59:32,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 03:59:32,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 03:59:32,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 83 transitions. [2024-11-28 03:59:32,851 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5763888888888888 [2024-11-28 03:59:32,851 INFO L175 Difference]: Start difference. First operand has 54 places, 51 transitions, 198 flow. Second operand 3 states and 83 transitions. [2024-11-28 03:59:32,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 64 transitions, 345 flow [2024-11-28 03:59:32,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 64 transitions, 315 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-28 03:59:32,855 INFO L231 Difference]: Finished difference. Result has 53 places, 51 transitions, 181 flow [2024-11-28 03:59:32,855 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=181, PETRI_PLACES=53, PETRI_TRANSITIONS=51} [2024-11-28 03:59:32,856 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 7 predicate places. [2024-11-28 03:59:32,856 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 51 transitions, 181 flow [2024-11-28 03:59:32,856 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:59:32,857 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:59:32,857 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:59:32,857 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-28 03:59:32,857 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2024-11-28 03:59:32,857 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:59:32,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1870301531, now seen corresponding path program 1 times [2024-11-28 03:59:32,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:59:32,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480936460] [2024-11-28 03:59:32,859 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:59:32,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:59:32,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:59:33,141 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:59:33,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:59:33,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480936460] [2024-11-28 03:59:33,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480936460] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:59:33,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534790032] [2024-11-28 03:59:33,141 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:59:33,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:59:33,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:59:33,149 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:59:33,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 03:59:33,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:59:33,247 INFO L256 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-28 03:59:33,249 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:59:33,386 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:59:33,386 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:59:33,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534790032] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:59:33,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 03:59:33,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2024-11-28 03:59:33,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413479954] [2024-11-28 03:59:33,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:59:33,387 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 03:59:33,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:59:33,388 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 03:59:33,388 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-11-28 03:59:33,396 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 48 [2024-11-28 03:59:33,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 51 transitions, 181 flow. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:59:33,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:59:33,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 48 [2024-11-28 03:59:33,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:59:33,693 INFO L124 PetriNetUnfolderBase]: 299/650 cut-off events. [2024-11-28 03:59:33,693 INFO L125 PetriNetUnfolderBase]: For 135/135 co-relation queries the response was YES. [2024-11-28 03:59:33,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1430 conditions, 650 events. 299/650 cut-off events. For 135/135 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2937 event pairs, 50 based on Foata normal form. 0/580 useless extension candidates. Maximal degree in co-relation 1356. Up to 210 conditions per place. [2024-11-28 03:59:33,697 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 63 selfloop transitions, 11 changer transitions 4/88 dead transitions. [2024-11-28 03:59:33,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 88 transitions, 436 flow [2024-11-28 03:59:33,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 03:59:33,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-28 03:59:33,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-11-28 03:59:33,699 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5173611111111112 [2024-11-28 03:59:33,699 INFO L175 Difference]: Start difference. First operand has 53 places, 51 transitions, 181 flow. Second operand 6 states and 149 transitions. [2024-11-28 03:59:33,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 88 transitions, 436 flow [2024-11-28 03:59:33,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 88 transitions, 433 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-28 03:59:33,702 INFO L231 Difference]: Finished difference. Result has 60 places, 55 transitions, 233 flow [2024-11-28 03:59:33,703 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=233, PETRI_PLACES=60, PETRI_TRANSITIONS=55} [2024-11-28 03:59:33,704 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 14 predicate places. [2024-11-28 03:59:33,704 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 55 transitions, 233 flow [2024-11-28 03:59:33,704 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:59:33,704 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:59:33,704 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:59:33,718 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-28 03:59:33,905 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-28 03:59:33,905 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2024-11-28 03:59:33,905 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:59:33,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1028468443, now seen corresponding path program 1 times [2024-11-28 03:59:33,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:59:33,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460361868] [2024-11-28 03:59:33,906 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:59:33,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:59:33,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:59:34,903 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:59:34,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:59:34,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460361868] [2024-11-28 03:59:34,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460361868] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:59:34,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901335605] [2024-11-28 03:59:34,905 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:59:34,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:59:34,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:59:34,908 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:59:34,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 03:59:35,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:59:35,019 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-28 03:59:35,023 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:59:35,170 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 [2024-11-28 03:59:35,813 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-11-28 03:59:35,857 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:59:35,857 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:59:36,452 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2024-11-28 03:59:36,463 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2024-11-28 03:59:36,631 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:59:36,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901335605] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:59:36,632 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:59:36,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 25 [2024-11-28 03:59:36,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347137570] [2024-11-28 03:59:36,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:59:36,633 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-28 03:59:36,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:59:36,634 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-28 03:59:36,634 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2024-11-28 03:59:36,816 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 48 [2024-11-28 03:59:36,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 55 transitions, 233 flow. Second operand has 27 states, 27 states have (on average 10.925925925925926) internal successors, (295), 27 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:59:36,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:59:36,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 48 [2024-11-28 03:59:36,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:59:40,579 INFO L124 PetriNetUnfolderBase]: 1185/2274 cut-off events. [2024-11-28 03:59:40,580 INFO L125 PetriNetUnfolderBase]: For 948/948 co-relation queries the response was YES. [2024-11-28 03:59:40,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5551 conditions, 2274 events. 1185/2274 cut-off events. For 948/948 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 13761 event pairs, 160 based on Foata normal form. 10/2062 useless extension candidates. Maximal degree in co-relation 4861. Up to 400 conditions per place. [2024-11-28 03:59:40,598 INFO L140 encePairwiseOnDemand]: 30/48 looper letters, 186 selfloop transitions, 54 changer transitions 27/274 dead transitions. [2024-11-28 03:59:40,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 274 transitions, 1468 flow [2024-11-28 03:59:40,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-28 03:59:40,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-11-28 03:59:40,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 525 transitions. [2024-11-28 03:59:40,602 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3645833333333333 [2024-11-28 03:59:40,602 INFO L175 Difference]: Start difference. First operand has 60 places, 55 transitions, 233 flow. Second operand 30 states and 525 transitions. [2024-11-28 03:59:40,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 274 transitions, 1468 flow [2024-11-28 03:59:40,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 274 transitions, 1463 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-28 03:59:40,611 INFO L231 Difference]: Finished difference. Result has 105 places, 90 transitions, 644 flow [2024-11-28 03:59:40,611 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=644, PETRI_PLACES=105, PETRI_TRANSITIONS=90} [2024-11-28 03:59:40,612 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 59 predicate places. [2024-11-28 03:59:40,612 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 90 transitions, 644 flow [2024-11-28 03:59:40,613 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 10.925925925925926) internal successors, (295), 27 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:59:40,613 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:59:40,613 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:59:40,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-28 03:59:40,817 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-28 03:59:40,818 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2024-11-28 03:59:40,818 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:59:40,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1431686841, now seen corresponding path program 1 times [2024-11-28 03:59:40,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:59:40,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246983892] [2024-11-28 03:59:40,819 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:59:40,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:59:40,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:59:40,907 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:59:40,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:59:40,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246983892] [2024-11-28 03:59:40,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246983892] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:59:40,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:59:40,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 03:59:40,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393551980] [2024-11-28 03:59:40,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:59:40,908 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 03:59:40,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:59:40,909 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 03:59:40,909 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 03:59:40,912 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 48 [2024-11-28 03:59:40,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 90 transitions, 644 flow. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:59:40,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:59:40,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 48 [2024-11-28 03:59:40,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:59:41,315 INFO L124 PetriNetUnfolderBase]: 892/1837 cut-off events. [2024-11-28 03:59:41,316 INFO L125 PetriNetUnfolderBase]: For 4002/4019 co-relation queries the response was YES. [2024-11-28 03:59:41,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6190 conditions, 1837 events. 892/1837 cut-off events. For 4002/4019 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 11267 event pairs, 370 based on Foata normal form. 6/1842 useless extension candidates. Maximal degree in co-relation 6054. Up to 1452 conditions per place. [2024-11-28 03:59:41,336 INFO L140 encePairwiseOnDemand]: 45/48 looper letters, 84 selfloop transitions, 2 changer transitions 7/106 dead transitions. [2024-11-28 03:59:41,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 106 transitions, 928 flow [2024-11-28 03:59:41,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 03:59:41,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 03:59:41,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 85 transitions. [2024-11-28 03:59:41,339 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5902777777777778 [2024-11-28 03:59:41,339 INFO L175 Difference]: Start difference. First operand has 105 places, 90 transitions, 644 flow. Second operand 3 states and 85 transitions. [2024-11-28 03:59:41,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 106 transitions, 928 flow [2024-11-28 03:59:41,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 106 transitions, 867 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-11-28 03:59:41,376 INFO L231 Difference]: Finished difference. Result has 97 places, 81 transitions, 522 flow [2024-11-28 03:59:41,377 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=518, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=522, PETRI_PLACES=97, PETRI_TRANSITIONS=81} [2024-11-28 03:59:41,378 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 51 predicate places. [2024-11-28 03:59:41,380 INFO L471 AbstractCegarLoop]: Abstraction has has 97 places, 81 transitions, 522 flow [2024-11-28 03:59:41,380 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:59:41,380 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:59:41,380 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:59:41,380 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-28 03:59:41,381 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2024-11-28 03:59:41,381 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:59:41,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1959441890, now seen corresponding path program 1 times [2024-11-28 03:59:41,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:59:41,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330053574] [2024-11-28 03:59:41,382 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:59:41,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:59:41,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:59:41,606 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:59:41,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:59:41,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330053574] [2024-11-28 03:59:41,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330053574] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:59:41,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884821298] [2024-11-28 03:59:41,607 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:59:41,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:59:41,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:59:41,610 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:59:41,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 03:59:41,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:59:41,701 INFO L256 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-28 03:59:41,702 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:59:41,772 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:59:41,772 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:59:41,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884821298] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:59:41,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 03:59:41,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2024-11-28 03:59:41,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332248181] [2024-11-28 03:59:41,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:59:41,774 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:59:41,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:59:41,775 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:59:41,776 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-28 03:59:41,778 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 48 [2024-11-28 03:59:41,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 81 transitions, 522 flow. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:59:41,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:59:41,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 48 [2024-11-28 03:59:41,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:59:42,355 INFO L124 PetriNetUnfolderBase]: 1431/2889 cut-off events. [2024-11-28 03:59:42,355 INFO L125 PetriNetUnfolderBase]: For 6098/6158 co-relation queries the response was YES. [2024-11-28 03:59:42,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9784 conditions, 2889 events. 1431/2889 cut-off events. For 6098/6158 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 18425 event pairs, 398 based on Foata normal form. 32/2898 useless extension candidates. Maximal degree in co-relation 8740. Up to 1046 conditions per place. [2024-11-28 03:59:42,389 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 92 selfloop transitions, 26 changer transitions 3/134 dead transitions. [2024-11-28 03:59:42,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 134 transitions, 1118 flow [2024-11-28 03:59:42,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:59:42,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 03:59:42,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 110 transitions. [2024-11-28 03:59:42,391 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5729166666666666 [2024-11-28 03:59:42,391 INFO L175 Difference]: Start difference. First operand has 97 places, 81 transitions, 522 flow. Second operand 4 states and 110 transitions. [2024-11-28 03:59:42,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 134 transitions, 1118 flow [2024-11-28 03:59:42,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 134 transitions, 1116 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-28 03:59:42,416 INFO L231 Difference]: Finished difference. Result has 101 places, 101 transitions, 819 flow [2024-11-28 03:59:42,416 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=520, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=819, PETRI_PLACES=101, PETRI_TRANSITIONS=101} [2024-11-28 03:59:42,417 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 55 predicate places. [2024-11-28 03:59:42,417 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 101 transitions, 819 flow [2024-11-28 03:59:42,418 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:59:42,418 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:59:42,418 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:59:42,430 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-28 03:59:42,619 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-28 03:59:42,620 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2024-11-28 03:59:42,620 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:59:42,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1187019760, now seen corresponding path program 1 times [2024-11-28 03:59:42,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:59:42,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539870080] [2024-11-28 03:59:42,621 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:59:42,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:59:42,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:59:44,329 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:59:44,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:59:44,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539870080] [2024-11-28 03:59:44,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539870080] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:59:44,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320055202] [2024-11-28 03:59:44,330 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:59:44,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:59:44,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:59:44,332 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:59:44,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 03:59:44,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:59:44,443 INFO L256 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-28 03:59:44,445 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:59:44,674 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:59:44,674 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:59:44,749 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:59:44,749 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2024-11-28 03:59:44,866 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-28 03:59:44,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320055202] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-28 03:59:44,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:59:44,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [12, 6] total 22 [2024-11-28 03:59:44,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855632728] [2024-11-28 03:59:44,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:59:44,867 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 03:59:44,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:59:44,868 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 03:59:44,869 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2024-11-28 03:59:44,893 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-11-28 03:59:44,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 101 transitions, 819 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) [2024-11-28 03:59:44,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:59:44,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-11-28 03:59:44,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:59:45,602 INFO L124 PetriNetUnfolderBase]: 1720/3391 cut-off events. [2024-11-28 03:59:45,602 INFO L125 PetriNetUnfolderBase]: For 9563/9587 co-relation queries the response was YES. [2024-11-28 03:59:45,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12414 conditions, 3391 events. 1720/3391 cut-off events. For 9563/9587 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 21770 event pairs, 242 based on Foata normal form. 42/3392 useless extension candidates. Maximal degree in co-relation 11146. Up to 1567 conditions per place. [2024-11-28 03:59:45,643 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 116 selfloop transitions, 18 changer transitions 5/150 dead transitions. [2024-11-28 03:59:45,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 150 transitions, 1467 flow [2024-11-28 03:59:45,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 03:59:45,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-28 03:59:45,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 154 transitions. [2024-11-28 03:59:45,645 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-11-28 03:59:45,646 INFO L175 Difference]: Start difference. First operand has 101 places, 101 transitions, 819 flow. Second operand 7 states and 154 transitions. [2024-11-28 03:59:45,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 150 transitions, 1467 flow [2024-11-28 03:59:45,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 150 transitions, 1455 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-11-28 03:59:45,676 INFO L231 Difference]: Finished difference. Result has 110 places, 103 transitions, 892 flow [2024-11-28 03:59:45,677 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=815, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=892, PETRI_PLACES=110, PETRI_TRANSITIONS=103} [2024-11-28 03:59:45,677 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 64 predicate places. [2024-11-28 03:59:45,678 INFO L471 AbstractCegarLoop]: Abstraction has has 110 places, 103 transitions, 892 flow [2024-11-28 03:59:45,678 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) [2024-11-28 03:59:45,678 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:59:45,678 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:59:45,689 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-28 03:59:45,878 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-28 03:59:45,879 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2024-11-28 03:59:45,879 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:59:45,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1158388603, now seen corresponding path program 2 times [2024-11-28 03:59:45,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:59:45,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629415172] [2024-11-28 03:59:45,880 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:59:45,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:59:45,909 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:59:45,909 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:59:46,084 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 03:59:46,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:59:46,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629415172] [2024-11-28 03:59:46,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629415172] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:59:46,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:59:46,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 03:59:46,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379487536] [2024-11-28 03:59:46,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:59:46,085 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 03:59:46,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:59:46,086 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 03:59:46,086 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-11-28 03:59:46,108 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-11-28 03:59:46,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 103 transitions, 892 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:59:46,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:59:46,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-11-28 03:59:46,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:59:46,797 INFO L124 PetriNetUnfolderBase]: 1735/3464 cut-off events. [2024-11-28 03:59:46,797 INFO L125 PetriNetUnfolderBase]: For 11897/11945 co-relation queries the response was YES. [2024-11-28 03:59:46,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13593 conditions, 3464 events. 1735/3464 cut-off events. For 11897/11945 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 21546 event pairs, 145 based on Foata normal form. 46/3477 useless extension candidates. Maximal degree in co-relation 11686. Up to 777 conditions per place. [2024-11-28 03:59:46,827 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 135 selfloop transitions, 22 changer transitions 4/173 dead transitions. [2024-11-28 03:59:46,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 173 transitions, 1764 flow [2024-11-28 03:59:46,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 03:59:46,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-28 03:59:46,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-11-28 03:59:46,828 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4895833333333333 [2024-11-28 03:59:46,828 INFO L175 Difference]: Start difference. First operand has 110 places, 103 transitions, 892 flow. Second operand 8 states and 188 transitions. [2024-11-28 03:59:46,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 173 transitions, 1764 flow [2024-11-28 03:59:46,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 173 transitions, 1709 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-11-28 03:59:46,859 INFO L231 Difference]: Finished difference. Result has 115 places, 104 transitions, 927 flow [2024-11-28 03:59:46,860 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=843, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=927, PETRI_PLACES=115, PETRI_TRANSITIONS=104} [2024-11-28 03:59:46,860 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 69 predicate places. [2024-11-28 03:59:46,860 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 104 transitions, 927 flow [2024-11-28 03:59:46,860 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:59:46,860 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:59:46,861 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:59:46,861 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-28 03:59:46,861 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2024-11-28 03:59:46,861 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:59:46,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1303536181, now seen corresponding path program 1 times [2024-11-28 03:59:46,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:59:46,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3723769] [2024-11-28 03:59:46,862 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:59:46,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:59:46,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:59:47,100 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:59:47,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:59:47,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3723769] [2024-11-28 03:59:47,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3723769] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:59:47,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198581268] [2024-11-28 03:59:47,101 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:59:47,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:59:47,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:59:47,103 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:59:47,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-28 03:59:47,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:59:47,180 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-28 03:59:47,182 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:59:47,345 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:59:47,345 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:59:47,546 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:59:47,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198581268] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:59:47,548 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:59:47,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2024-11-28 03:59:47,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972500931] [2024-11-28 03:59:47,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:59:47,549 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-28 03:59:47,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:59:47,551 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-28 03:59:47,551 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2024-11-28 03:59:47,626 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-11-28 03:59:47,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 104 transitions, 927 flow. Second operand has 20 states, 20 states have (on average 14.7) internal successors, (294), 20 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:59:47,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:59:47,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-11-28 03:59:47,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:59:48,512 INFO L124 PetriNetUnfolderBase]: 1126/2372 cut-off events. [2024-11-28 03:59:48,513 INFO L125 PetriNetUnfolderBase]: For 9239/9251 co-relation queries the response was YES. [2024-11-28 03:59:48,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9072 conditions, 2372 events. 1126/2372 cut-off events. For 9239/9251 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 13614 event pairs, 392 based on Foata normal form. 11/2354 useless extension candidates. Maximal degree in co-relation 8879. Up to 895 conditions per place. [2024-11-28 03:59:48,536 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 52 selfloop transitions, 22 changer transitions 27/114 dead transitions. [2024-11-28 03:59:48,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 114 transitions, 1025 flow [2024-11-28 03:59:48,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-28 03:59:48,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-28 03:59:48,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 226 transitions. [2024-11-28 03:59:48,541 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36217948717948717 [2024-11-28 03:59:48,541 INFO L175 Difference]: Start difference. First operand has 115 places, 104 transitions, 927 flow. Second operand 13 states and 226 transitions. [2024-11-28 03:59:48,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 114 transitions, 1025 flow [2024-11-28 03:59:48,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 114 transitions, 940 flow, removed 22 selfloop flow, removed 11 redundant places. [2024-11-28 03:59:48,567 INFO L231 Difference]: Finished difference. Result has 113 places, 74 transitions, 584 flow [2024-11-28 03:59:48,567 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=605, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=584, PETRI_PLACES=113, PETRI_TRANSITIONS=74} [2024-11-28 03:59:48,568 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 67 predicate places. [2024-11-28 03:59:48,568 INFO L471 AbstractCegarLoop]: Abstraction has has 113 places, 74 transitions, 584 flow [2024-11-28 03:59:48,569 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 14.7) internal successors, (294), 20 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:59:48,569 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:59:48,569 INFO L206 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, 1, 1, 1, 1, 1] [2024-11-28 03:59:48,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-28 03:59:48,769 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-28 03:59:48,769 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2024-11-28 03:59:48,770 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:59:48,770 INFO L85 PathProgramCache]: Analyzing trace with hash -222544236, now seen corresponding path program 2 times [2024-11-28 03:59:48,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:59:48,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939093538] [2024-11-28 03:59:48,770 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:59:48,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:59:48,791 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 03:59:48,792 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:59:48,847 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 03:59:48,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:59:48,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939093538] [2024-11-28 03:59:48,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939093538] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:59:48,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:59:48,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 03:59:48,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356283036] [2024-11-28 03:59:48,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:59:48,849 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 03:59:48,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:59:48,850 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 03:59:48,851 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:59:48,853 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 48 [2024-11-28 03:59:48,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 74 transitions, 584 flow. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:59:48,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:59:48,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 48 [2024-11-28 03:59:48,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:59:49,300 INFO L124 PetriNetUnfolderBase]: 1073/2135 cut-off events. [2024-11-28 03:59:49,300 INFO L125 PetriNetUnfolderBase]: For 9051/9107 co-relation queries the response was YES. [2024-11-28 03:59:49,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8386 conditions, 2135 events. 1073/2135 cut-off events. For 9051/9107 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 11968 event pairs, 334 based on Foata normal form. 188/2311 useless extension candidates. Maximal degree in co-relation 8118. Up to 956 conditions per place. [2024-11-28 03:59:49,316 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 64 selfloop transitions, 20 changer transitions 0/97 dead transitions. [2024-11-28 03:59:49,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 97 transitions, 903 flow [2024-11-28 03:59:49,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 03:59:49,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-28 03:59:49,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 133 transitions. [2024-11-28 03:59:49,317 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4618055555555556 [2024-11-28 03:59:49,317 INFO L175 Difference]: Start difference. First operand has 113 places, 74 transitions, 584 flow. Second operand 6 states and 133 transitions. [2024-11-28 03:59:49,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 97 transitions, 903 flow [2024-11-28 03:59:49,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 97 transitions, 841 flow, removed 10 selfloop flow, removed 14 redundant places. [2024-11-28 03:59:49,330 INFO L231 Difference]: Finished difference. Result has 97 places, 80 transitions, 695 flow [2024-11-28 03:59:49,331 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=524, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=695, PETRI_PLACES=97, PETRI_TRANSITIONS=80} [2024-11-28 03:59:49,331 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 51 predicate places. [2024-11-28 03:59:49,332 INFO L471 AbstractCegarLoop]: Abstraction has has 97 places, 80 transitions, 695 flow [2024-11-28 03:59:49,333 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:59:49,333 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:59:49,333 INFO L206 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, 1, 1, 1, 1, 1] [2024-11-28 03:59:49,333 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-28 03:59:49,333 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2024-11-28 03:59:49,334 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:59:49,334 INFO L85 PathProgramCache]: Analyzing trace with hash -570392710, now seen corresponding path program 3 times [2024-11-28 03:59:49,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:59:49,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577166225] [2024-11-28 03:59:49,334 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:59:49,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:59:49,358 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 03:59:49,358 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:59:49,417 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-28 03:59:49,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:59:49,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577166225] [2024-11-28 03:59:49,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577166225] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:59:49,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968848800] [2024-11-28 03:59:49,417 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:59:49,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:59:49,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:59:49,419 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:59:49,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-28 03:59:49,505 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 03:59:49,505 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:59:49,506 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-28 03:59:49,508 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:59:49,569 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-28 03:59:49,569 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:59:49,633 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-28 03:59:49,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968848800] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:59:49,634 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:59:49,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 5, 5] total 6 [2024-11-28 03:59:49,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984066155] [2024-11-28 03:59:49,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:59:49,634 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 03:59:49,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:59:49,635 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 03:59:49,635 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-11-28 03:59:49,643 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 48 [2024-11-28 03:59:49,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 80 transitions, 695 flow. Second operand has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:59:49,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:59:49,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 48 [2024-11-28 03:59:49,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:59:50,020 INFO L124 PetriNetUnfolderBase]: 1005/1999 cut-off events. [2024-11-28 03:59:50,020 INFO L125 PetriNetUnfolderBase]: For 9065/9109 co-relation queries the response was YES. [2024-11-28 03:59:50,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8201 conditions, 1999 events. 1005/1999 cut-off events. For 9065/9109 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 11076 event pairs, 138 based on Foata normal form. 32/2027 useless extension candidates. Maximal degree in co-relation 7639. Up to 734 conditions per place. [2024-11-28 03:59:50,037 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 44 selfloop transitions, 54 changer transitions 5/116 dead transitions. [2024-11-28 03:59:50,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 116 transitions, 1239 flow [2024-11-28 03:59:50,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 03:59:50,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-28 03:59:50,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 146 transitions. [2024-11-28 03:59:50,039 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-11-28 03:59:50,039 INFO L175 Difference]: Start difference. First operand has 97 places, 80 transitions, 695 flow. Second operand 7 states and 146 transitions. [2024-11-28 03:59:50,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 116 transitions, 1239 flow [2024-11-28 03:59:50,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 116 transitions, 1178 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-11-28 03:59:50,057 INFO L231 Difference]: Finished difference. Result has 97 places, 98 transitions, 1009 flow [2024-11-28 03:59:50,058 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=647, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1009, PETRI_PLACES=97, PETRI_TRANSITIONS=98} [2024-11-28 03:59:50,058 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 51 predicate places. [2024-11-28 03:59:50,059 INFO L471 AbstractCegarLoop]: Abstraction has has 97 places, 98 transitions, 1009 flow [2024-11-28 03:59:50,059 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:59:50,059 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:59:50,059 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:59:50,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-28 03:59:50,264 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-28 03:59:50,264 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2024-11-28 03:59:50,265 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:59:50,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1821165846, now seen corresponding path program 1 times [2024-11-28 03:59:50,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:59:50,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723735958] [2024-11-28 03:59:50,265 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:59:50,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:59:50,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:59:51,433 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:59:51,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:59:51,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723735958] [2024-11-28 03:59:51,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723735958] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:59:51,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264268914] [2024-11-28 03:59:51,434 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:59:51,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:59:51,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:59:51,437 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:59:51,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-28 03:59:51,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:59:51,529 INFO L256 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-28 03:59:51,531 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:59:51,685 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 [2024-11-28 03:59:52,603 INFO L349 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2024-11-28 03:59:52,603 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 37 treesize of output 15 [2024-11-28 03:59:52,643 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:59:52,643 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:59:53,386 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 58 treesize of output 52 [2024-11-28 03:59:53,406 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:59:53,406 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 117 treesize of output 103 [2024-11-28 03:59:54,144 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:59:54,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264268914] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:59:54,144 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:59:54,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 45 [2024-11-28 03:59:54,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451743506] [2024-11-28 03:59:54,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:59:54,145 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-11-28 03:59:54,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:59:54,146 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-11-28 03:59:54,147 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=1877, Unknown=0, NotChecked=0, Total=2162 [2024-11-28 03:59:54,374 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 48 [2024-11-28 03:59:54,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 98 transitions, 1009 flow. Second operand has 47 states, 47 states have (on average 10.787234042553191) internal successors, (507), 47 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:59:54,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:59:54,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 48 [2024-11-28 03:59:54,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:00:06,472 INFO L124 PetriNetUnfolderBase]: 5644/10133 cut-off events. [2024-11-28 04:00:06,472 INFO L125 PetriNetUnfolderBase]: For 47437/47437 co-relation queries the response was YES. [2024-11-28 04:00:06,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40273 conditions, 10133 events. 5644/10133 cut-off events. For 47437/47437 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 68514 event pairs, 249 based on Foata normal form. 644/10777 useless extension candidates. Maximal degree in co-relation 26835. Up to 1830 conditions per place. [2024-11-28 04:00:06,540 INFO L140 encePairwiseOnDemand]: 29/48 looper letters, 416 selfloop transitions, 336 changer transitions 67/827 dead transitions. [2024-11-28 04:00:06,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 827 transitions, 8471 flow [2024-11-28 04:00:06,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2024-11-28 04:00:06,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2024-11-28 04:00:06,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 1478 transitions. [2024-11-28 04:00:06,545 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3310931899641577 [2024-11-28 04:00:06,545 INFO L175 Difference]: Start difference. First operand has 97 places, 98 transitions, 1009 flow. Second operand 93 states and 1478 transitions. [2024-11-28 04:00:06,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 827 transitions, 8471 flow [2024-11-28 04:00:06,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 827 transitions, 8069 flow, removed 196 selfloop flow, removed 3 redundant places. [2024-11-28 04:00:06,639 INFO L231 Difference]: Finished difference. Result has 227 places, 439 transitions, 6236 flow [2024-11-28 04:00:06,639 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=973, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=6236, PETRI_PLACES=227, PETRI_TRANSITIONS=439} [2024-11-28 04:00:06,640 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 181 predicate places. [2024-11-28 04:00:06,640 INFO L471 AbstractCegarLoop]: Abstraction has has 227 places, 439 transitions, 6236 flow [2024-11-28 04:00:06,640 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 10.787234042553191) internal successors, (507), 47 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:00:06,641 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:00:06,641 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:00:06,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-28 04:00:06,845 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:00:06,846 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2024-11-28 04:00:06,846 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:00:06,846 INFO L85 PathProgramCache]: Analyzing trace with hash -2054846200, now seen corresponding path program 1 times [2024-11-28 04:00:06,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:00:06,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887465104] [2024-11-28 04:00:06,847 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:00:06,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:00:06,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:00:07,774 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:00:07,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:00:07,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887465104] [2024-11-28 04:00:07,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887465104] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:00:07,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069148926] [2024-11-28 04:00:07,774 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:00:07,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:00:07,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:00:07,777 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:00:07,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-28 04:00:07,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:00:07,864 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-28 04:00:07,868 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:00:08,374 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-28 04:00:08,374 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 25 treesize of output 12 [2024-11-28 04:00:08,446 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:00:08,447 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:00:08,508 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:00:08,509 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 28 treesize of output 20 [2024-11-28 04:00:09,331 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:00:09,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069148926] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:00:09,332 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:00:09,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 42 [2024-11-28 04:00:09,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352602170] [2024-11-28 04:00:09,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:00:09,332 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-28 04:00:09,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:00:09,333 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-28 04:00:09,334 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1589, Unknown=0, NotChecked=0, Total=1806 [2024-11-28 04:00:09,616 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 48 [2024-11-28 04:00:09,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 439 transitions, 6236 flow. Second operand has 43 states, 43 states have (on average 11.767441860465116) internal successors, (506), 43 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:00:09,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:00:09,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 48 [2024-11-28 04:00:09,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:00:14,069 INFO L124 PetriNetUnfolderBase]: 3095/6088 cut-off events. [2024-11-28 04:00:14,069 INFO L125 PetriNetUnfolderBase]: For 93264/93444 co-relation queries the response was YES. [2024-11-28 04:00:14,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35140 conditions, 6088 events. 3095/6088 cut-off events. For 93264/93444 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 42840 event pairs, 160 based on Foata normal form. 191/6271 useless extension candidates. Maximal degree in co-relation 34856. Up to 1979 conditions per place. [2024-11-28 04:00:14,122 INFO L140 encePairwiseOnDemand]: 31/48 looper letters, 300 selfloop transitions, 186 changer transitions 35/534 dead transitions. [2024-11-28 04:00:14,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 534 transitions, 7627 flow [2024-11-28 04:00:14,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-28 04:00:14,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2024-11-28 04:00:14,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 604 transitions. [2024-11-28 04:00:14,125 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3400900900900901 [2024-11-28 04:00:14,125 INFO L175 Difference]: Start difference. First operand has 227 places, 439 transitions, 6236 flow. Second operand 37 states and 604 transitions. [2024-11-28 04:00:14,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 534 transitions, 7627 flow [2024-11-28 04:00:14,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 534 transitions, 6954 flow, removed 232 selfloop flow, removed 26 redundant places. [2024-11-28 04:00:14,456 INFO L231 Difference]: Finished difference. Result has 232 places, 371 transitions, 5425 flow [2024-11-28 04:00:14,457 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4351, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=5425, PETRI_PLACES=232, PETRI_TRANSITIONS=371} [2024-11-28 04:00:14,457 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 186 predicate places. [2024-11-28 04:00:14,457 INFO L471 AbstractCegarLoop]: Abstraction has has 232 places, 371 transitions, 5425 flow [2024-11-28 04:00:14,458 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 11.767441860465116) internal successors, (506), 43 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:00:14,458 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:00:14,458 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:00:14,469 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-28 04:00:14,658 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:00:14,658 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2024-11-28 04:00:14,659 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:00:14,659 INFO L85 PathProgramCache]: Analyzing trace with hash -351824274, now seen corresponding path program 1 times [2024-11-28 04:00:14,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:00:14,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130481114] [2024-11-28 04:00:14,659 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:00:14,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:00:14,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:00:14,771 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-28 04:00:14,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:00:14,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130481114] [2024-11-28 04:00:14,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130481114] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:00:14,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:00:14,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 04:00:14,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461903970] [2024-11-28 04:00:14,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:00:14,772 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 04:00:14,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:00:14,773 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 04:00:14,773 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:00:14,775 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 48 [2024-11-28 04:00:14,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 371 transitions, 5425 flow. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 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) [2024-11-28 04:00:14,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:00:14,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 48 [2024-11-28 04:00:14,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:00:16,698 INFO L124 PetriNetUnfolderBase]: 3620/7242 cut-off events. [2024-11-28 04:00:16,698 INFO L125 PetriNetUnfolderBase]: For 116509/116819 co-relation queries the response was YES. [2024-11-28 04:00:16,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41940 conditions, 7242 events. 3620/7242 cut-off events. For 116509/116819 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 52982 event pairs, 608 based on Foata normal form. 374/7586 useless extension candidates. Maximal degree in co-relation 41553. Up to 3266 conditions per place. [2024-11-28 04:00:16,796 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 425 selfloop transitions, 4 changer transitions 12/460 dead transitions. [2024-11-28 04:00:16,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 460 transitions, 7917 flow [2024-11-28 04:00:16,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 04:00:16,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 04:00:16,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 98 transitions. [2024-11-28 04:00:16,798 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5104166666666666 [2024-11-28 04:00:16,798 INFO L175 Difference]: Start difference. First operand has 232 places, 371 transitions, 5425 flow. Second operand 4 states and 98 transitions. [2024-11-28 04:00:16,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 460 transitions, 7917 flow [2024-11-28 04:00:17,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 460 transitions, 7475 flow, removed 90 selfloop flow, removed 21 redundant places. [2024-11-28 04:00:17,200 INFO L231 Difference]: Finished difference. Result has 211 places, 343 transitions, 4780 flow [2024-11-28 04:00:17,200 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4778, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=4780, PETRI_PLACES=211, PETRI_TRANSITIONS=343} [2024-11-28 04:00:17,201 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 165 predicate places. [2024-11-28 04:00:17,201 INFO L471 AbstractCegarLoop]: Abstraction has has 211 places, 343 transitions, 4780 flow [2024-11-28 04:00:17,201 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 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) [2024-11-28 04:00:17,201 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:00:17,201 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:00:17,201 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-11-28 04:00:17,201 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2024-11-28 04:00:17,202 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:00:17,202 INFO L85 PathProgramCache]: Analyzing trace with hash 702388344, now seen corresponding path program 2 times [2024-11-28 04:00:17,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:00:17,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405603608] [2024-11-28 04:00:17,203 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:00:17,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:00:17,230 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:00:17,230 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:00:18,195 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:00:18,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:00:18,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405603608] [2024-11-28 04:00:18,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405603608] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:00:18,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025248038] [2024-11-28 04:00:18,196 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:00:18,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:00:18,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:00:18,198 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:00:18,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-28 04:00:18,297 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:00:18,298 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:00:18,299 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-28 04:00:18,302 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:00:18,438 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 [2024-11-28 04:00:18,968 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-28 04:00:18,969 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 25 treesize of output 12 [2024-11-28 04:00:19,015 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:00:19,015 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:00:19,896 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 [2024-11-28 04:00:19,907 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-11-28 04:00:19,908 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 [2024-11-28 04:00:20,220 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:00:20,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025248038] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:00:20,220 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:00:20,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 15] total 47 [2024-11-28 04:00:20,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101603209] [2024-11-28 04:00:20,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:00:20,221 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-11-28 04:00:20,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:00:20,222 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-11-28 04:00:20,223 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=2016, Unknown=0, NotChecked=0, Total=2256 [2024-11-28 04:00:20,597 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 48 [2024-11-28 04:00:20,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 343 transitions, 4780 flow. Second operand has 48 states, 48 states have (on average 11.645833333333334) internal successors, (559), 48 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:00:20,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:00:20,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 48 [2024-11-28 04:00:20,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:00:28,191 INFO L124 PetriNetUnfolderBase]: 4053/7792 cut-off events. [2024-11-28 04:00:28,191 INFO L125 PetriNetUnfolderBase]: For 113720/113926 co-relation queries the response was YES. [2024-11-28 04:00:28,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45848 conditions, 7792 events. 4053/7792 cut-off events. For 113720/113926 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 54341 event pairs, 88 based on Foata normal form. 228/7977 useless extension candidates. Maximal degree in co-relation 44324. Up to 1874 conditions per place. [2024-11-28 04:00:28,255 INFO L140 encePairwiseOnDemand]: 31/48 looper letters, 348 selfloop transitions, 436 changer transitions 66/864 dead transitions. [2024-11-28 04:00:28,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 864 transitions, 11911 flow [2024-11-28 04:00:28,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2024-11-28 04:00:28,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2024-11-28 04:00:28,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 1427 transitions. [2024-11-28 04:00:28,259 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.319668458781362 [2024-11-28 04:00:28,259 INFO L175 Difference]: Start difference. First operand has 211 places, 343 transitions, 4780 flow. Second operand 93 states and 1427 transitions. [2024-11-28 04:00:28,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 864 transitions, 11911 flow [2024-11-28 04:00:28,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 864 transitions, 10676 flow, removed 475 selfloop flow, removed 18 redundant places. [2024-11-28 04:00:28,595 INFO L231 Difference]: Finished difference. Result has 291 places, 545 transitions, 8725 flow [2024-11-28 04:00:28,595 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=3341, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=8725, PETRI_PLACES=291, PETRI_TRANSITIONS=545} [2024-11-28 04:00:28,595 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 245 predicate places. [2024-11-28 04:00:28,595 INFO L471 AbstractCegarLoop]: Abstraction has has 291 places, 545 transitions, 8725 flow [2024-11-28 04:00:28,595 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 11.645833333333334) internal successors, (559), 48 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:00:28,596 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:00:28,596 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:00:28,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-28 04:00:28,796 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-28 04:00:28,796 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2024-11-28 04:00:28,796 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:00:28,797 INFO L85 PathProgramCache]: Analyzing trace with hash 794814552, now seen corresponding path program 3 times [2024-11-28 04:00:28,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:00:28,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281646116] [2024-11-28 04:00:28,797 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:00:28,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:00:28,813 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 04:00:28,814 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:00:28,972 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-28 04:00:28,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:00:28,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281646116] [2024-11-28 04:00:28,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281646116] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:00:28,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639553043] [2024-11-28 04:00:28,973 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:00:28,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:00:28,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:00:28,975 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:00:28,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-28 04:00:29,058 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 04:00:29,058 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:00:29,059 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-28 04:00:29,061 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:00:29,153 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-28 04:00:29,153 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:00:29,194 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:00:29,194 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 28 treesize of output 20 [2024-11-28 04:00:29,273 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-28 04:00:29,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639553043] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:00:29,273 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:00:29,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 14 [2024-11-28 04:00:29,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15651492] [2024-11-28 04:00:29,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:00:29,274 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-28 04:00:29,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:00:29,274 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-28 04:00:29,274 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-11-28 04:00:29,309 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-11-28 04:00:29,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 545 transitions, 8725 flow. Second operand has 15 states, 15 states have (on average 14.4) internal successors, (216), 15 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:00:29,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:00:29,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-11-28 04:00:29,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:00:31,803 INFO L124 PetriNetUnfolderBase]: 5308/10361 cut-off events. [2024-11-28 04:00:31,803 INFO L125 PetriNetUnfolderBase]: For 148433/148755 co-relation queries the response was YES. [2024-11-28 04:00:31,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62976 conditions, 10361 events. 5308/10361 cut-off events. For 148433/148755 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 75104 event pairs, 577 based on Foata normal form. 378/10629 useless extension candidates. Maximal degree in co-relation 62736. Up to 4020 conditions per place. [2024-11-28 04:00:31,940 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 598 selfloop transitions, 238 changer transitions 15/865 dead transitions. [2024-11-28 04:00:31,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 865 transitions, 15161 flow [2024-11-28 04:00:31,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-28 04:00:31,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-28 04:00:31,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 365 transitions. [2024-11-28 04:00:31,942 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.44730392156862747 [2024-11-28 04:00:31,942 INFO L175 Difference]: Start difference. First operand has 291 places, 545 transitions, 8725 flow. Second operand 17 states and 365 transitions. [2024-11-28 04:00:31,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 865 transitions, 15161 flow [2024-11-28 04:00:33,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 865 transitions, 13233 flow, removed 674 selfloop flow, removed 29 redundant places. [2024-11-28 04:00:33,051 INFO L231 Difference]: Finished difference. Result has 272 places, 643 transitions, 10182 flow [2024-11-28 04:00:33,052 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=7554, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=10182, PETRI_PLACES=272, PETRI_TRANSITIONS=643} [2024-11-28 04:00:33,052 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 226 predicate places. [2024-11-28 04:00:33,053 INFO L471 AbstractCegarLoop]: Abstraction has has 272 places, 643 transitions, 10182 flow [2024-11-28 04:00:33,053 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 14.4) internal successors, (216), 15 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:00:33,053 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:00:33,053 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:00:33,062 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-28 04:00:33,253 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:00:33,254 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2024-11-28 04:00:33,254 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:00:33,254 INFO L85 PathProgramCache]: Analyzing trace with hash -747242296, now seen corresponding path program 4 times [2024-11-28 04:00:33,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:00:33,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048644434] [2024-11-28 04:00:33,254 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:00:33,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:00:33,280 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:00:33,284 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:00:35,028 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:00:35,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:00:35,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048644434] [2024-11-28 04:00:35,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048644434] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:00:35,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72112044] [2024-11-28 04:00:35,029 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:00:35,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:00:35,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:00:35,031 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:00:35,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-28 04:00:35,130 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:00:35,131 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:00:35,132 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-28 04:00:35,135 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:00:35,326 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 [2024-11-28 04:00:36,118 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:00:36,118 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:00:37,005 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 71 [2024-11-28 04:00:37,033 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:00:37,034 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 146 treesize of output 143 [2024-11-28 04:00:37,826 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:00:37,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72112044] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:00:37,826 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:00:37,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 47 [2024-11-28 04:00:37,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93589695] [2024-11-28 04:00:37,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:00:37,827 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-28 04:00:37,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:00:37,827 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-28 04:00:37,828 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=2051, Unknown=0, NotChecked=0, Total=2352 [2024-11-28 04:00:38,405 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 48 [2024-11-28 04:00:38,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 643 transitions, 10182 flow. Second operand has 49 states, 49 states have (on average 11.653061224489797) internal successors, (571), 49 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:00:38,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:00:38,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 48 [2024-11-28 04:00:38,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:00:48,262 INFO L124 PetriNetUnfolderBase]: 6355/12208 cut-off events. [2024-11-28 04:00:48,262 INFO L125 PetriNetUnfolderBase]: For 150513/150857 co-relation queries the response was YES. [2024-11-28 04:00:48,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73702 conditions, 12208 events. 6355/12208 cut-off events. For 150513/150857 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 90204 event pairs, 479 based on Foata normal form. 378/12461 useless extension candidates. Maximal degree in co-relation 70738. Up to 5661 conditions per place. [2024-11-28 04:00:48,438 INFO L140 encePairwiseOnDemand]: 31/48 looper letters, 503 selfloop transitions, 538 changer transitions 63/1118 dead transitions. [2024-11-28 04:00:48,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 1118 transitions, 17325 flow [2024-11-28 04:00:48,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2024-11-28 04:00:48,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2024-11-28 04:00:48,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 1279 transitions. [2024-11-28 04:00:48,441 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.30983527131782945 [2024-11-28 04:00:48,441 INFO L175 Difference]: Start difference. First operand has 272 places, 643 transitions, 10182 flow. Second operand 86 states and 1279 transitions. [2024-11-28 04:00:48,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 1118 transitions, 17325 flow [2024-11-28 04:00:49,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 1118 transitions, 16695 flow, removed 151 selfloop flow, removed 7 redundant places. [2024-11-28 04:00:49,987 INFO L231 Difference]: Finished difference. Result has 370 places, 837 transitions, 14275 flow [2024-11-28 04:00:49,988 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=9731, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=643, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=349, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=86, PETRI_FLOW=14275, PETRI_PLACES=370, PETRI_TRANSITIONS=837} [2024-11-28 04:00:49,989 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 324 predicate places. [2024-11-28 04:00:49,989 INFO L471 AbstractCegarLoop]: Abstraction has has 370 places, 837 transitions, 14275 flow [2024-11-28 04:00:49,989 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 11.653061224489797) internal successors, (571), 49 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:00:49,989 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:00:49,989 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:00:49,998 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-28 04:00:50,189 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:00:50,190 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2024-11-28 04:00:50,191 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:00:50,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1764734818, now seen corresponding path program 5 times [2024-11-28 04:00:50,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:00:50,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068402161] [2024-11-28 04:00:50,191 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 04:00:50,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:00:50,211 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-28 04:00:50,212 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:00:51,361 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:00:51,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:00:51,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068402161] [2024-11-28 04:00:51,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068402161] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:00:51,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078462542] [2024-11-28 04:00:51,362 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 04:00:51,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:00:51,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:00:51,363 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:00:51,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-28 04:00:51,448 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-28 04:00:51,448 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:00:51,449 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-28 04:00:51,451 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:00:52,229 INFO L349 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2024-11-28 04:00:52,229 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 37 treesize of output 15 [2024-11-28 04:00:52,276 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:00:52,277 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:00:52,849 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2024-11-28 04:00:52,850 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 53 [2024-11-28 04:00:53,630 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:00:53,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078462542] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:00:53,630 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:00:53,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 46 [2024-11-28 04:00:53,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985114124] [2024-11-28 04:00:53,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:00:53,631 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-11-28 04:00:53,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:00:53,631 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-11-28 04:00:53,632 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=2016, Unknown=0, NotChecked=0, Total=2256 [2024-11-28 04:00:54,301 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 48 [2024-11-28 04:00:54,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 837 transitions, 14275 flow. Second operand has 48 states, 48 states have (on average 11.6875) internal successors, (561), 48 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:00:54,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:00:54,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 48 [2024-11-28 04:00:54,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:01:00,264 INFO L124 PetriNetUnfolderBase]: 6202/12009 cut-off events. [2024-11-28 04:01:00,264 INFO L125 PetriNetUnfolderBase]: For 158180/158566 co-relation queries the response was YES. [2024-11-28 04:01:00,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76324 conditions, 12009 events. 6202/12009 cut-off events. For 158180/158566 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 88883 event pairs, 514 based on Foata normal form. 286/12173 useless extension candidates. Maximal degree in co-relation 76039. Up to 6588 conditions per place. [2024-11-28 04:01:00,437 INFO L140 encePairwiseOnDemand]: 31/48 looper letters, 538 selfloop transitions, 335 changer transitions 60/947 dead transitions. [2024-11-28 04:01:00,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 947 transitions, 16648 flow [2024-11-28 04:01:00,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-11-28 04:01:00,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2024-11-28 04:01:00,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 635 transitions. [2024-11-28 04:01:00,439 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3006628787878788 [2024-11-28 04:01:00,439 INFO L175 Difference]: Start difference. First operand has 370 places, 837 transitions, 14275 flow. Second operand 44 states and 635 transitions. [2024-11-28 04:01:00,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 947 transitions, 16648 flow [2024-11-28 04:01:02,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 947 transitions, 16028 flow, removed 159 selfloop flow, removed 41 redundant places. [2024-11-28 04:01:02,702 INFO L231 Difference]: Finished difference. Result has 361 places, 814 transitions, 13946 flow [2024-11-28 04:01:02,703 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=13602, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=834, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=335, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=499, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=13946, PETRI_PLACES=361, PETRI_TRANSITIONS=814} [2024-11-28 04:01:02,703 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 315 predicate places. [2024-11-28 04:01:02,703 INFO L471 AbstractCegarLoop]: Abstraction has has 361 places, 814 transitions, 13946 flow [2024-11-28 04:01:02,704 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 11.6875) internal successors, (561), 48 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:01:02,704 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:01:02,704 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:01:02,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-28 04:01:02,904 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:01:02,905 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2024-11-28 04:01:02,905 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:01:02,905 INFO L85 PathProgramCache]: Analyzing trace with hash 861796807, now seen corresponding path program 2 times [2024-11-28 04:01:02,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:01:02,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630276649] [2024-11-28 04:01:02,905 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:01:02,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:01:02,933 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:01:02,934 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:01:04,721 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 14 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:01:04,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:01:04,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630276649] [2024-11-28 04:01:04,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630276649] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:01:04,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809673314] [2024-11-28 04:01:04,722 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:01:04,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:01:04,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:01:04,723 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:01:04,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-28 04:01:04,816 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:01:04,816 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:01:04,817 INFO L256 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-28 04:01:04,819 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:01:05,246 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 04:01:05,247 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:01:05,487 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:01:05,487 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 52 treesize of output 54 [2024-11-28 04:01:05,603 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-28 04:01:05,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809673314] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:01:05,603 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:01:05,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 13, 9] total 40 [2024-11-28 04:01:05,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847579867] [2024-11-28 04:01:05,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:01:05,604 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-11-28 04:01:05,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:01:05,604 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-11-28 04:01:05,605 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1486, Unknown=0, NotChecked=0, Total=1722 [2024-11-28 04:01:05,810 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 48 [2024-11-28 04:01:05,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 814 transitions, 13946 flow. Second operand has 42 states, 42 states have (on average 11.0) internal successors, (462), 42 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:01:05,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:01:05,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 48 [2024-11-28 04:01:05,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:01:15,321 INFO L124 PetriNetUnfolderBase]: 11533/20872 cut-off events. [2024-11-28 04:01:15,321 INFO L125 PetriNetUnfolderBase]: For 273185/273185 co-relation queries the response was YES. [2024-11-28 04:01:15,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131051 conditions, 20872 events. 11533/20872 cut-off events. For 273185/273185 co-relation queries the response was YES. Maximal size of possible extension queue 627. Compared 161077 event pairs, 795 based on Foata normal form. 318/21120 useless extension candidates. Maximal degree in co-relation 129836. Up to 5842 conditions per place. [2024-11-28 04:01:15,563 INFO L140 encePairwiseOnDemand]: 31/48 looper letters, 851 selfloop transitions, 893 changer transitions 18/1771 dead transitions. [2024-11-28 04:01:15,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 1771 transitions, 31105 flow [2024-11-28 04:01:15,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2024-11-28 04:01:15,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2024-11-28 04:01:15,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 1155 transitions. [2024-11-28 04:01:15,566 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.31661184210526316 [2024-11-28 04:01:15,566 INFO L175 Difference]: Start difference. First operand has 361 places, 814 transitions, 13946 flow. Second operand 76 states and 1155 transitions. [2024-11-28 04:01:15,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 1771 transitions, 31105 flow [2024-11-28 04:01:18,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 1771 transitions, 29653 flow, removed 74 selfloop flow, removed 47 redundant places. [2024-11-28 04:01:18,644 INFO L231 Difference]: Finished difference. Result has 387 places, 1320 transitions, 24672 flow [2024-11-28 04:01:18,644 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=13144, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=809, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=440, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=76, PETRI_FLOW=24672, PETRI_PLACES=387, PETRI_TRANSITIONS=1320} [2024-11-28 04:01:18,645 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 341 predicate places. [2024-11-28 04:01:18,645 INFO L471 AbstractCegarLoop]: Abstraction has has 387 places, 1320 transitions, 24672 flow [2024-11-28 04:01:18,645 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 11.0) internal successors, (462), 42 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:01:18,645 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:01:18,645 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:01:18,651 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-28 04:01:18,846 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:01:18,846 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2024-11-28 04:01:18,846 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:01:18,847 INFO L85 PathProgramCache]: Analyzing trace with hash 70114925, now seen corresponding path program 3 times [2024-11-28 04:01:18,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:01:18,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493549379] [2024-11-28 04:01:18,847 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:01:18,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:01:18,865 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 04:01:18,865 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:01:19,206 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-28 04:01:19,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:01:19,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493549379] [2024-11-28 04:01:19,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493549379] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:01:19,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841485479] [2024-11-28 04:01:19,207 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:01:19,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:01:19,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:01:19,209 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:01:19,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-28 04:01:19,309 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 04:01:19,381 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:01:19,383 INFO L256 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-28 04:01:19,385 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:01:19,880 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-28 04:01:19,880 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:01:20,170 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:01:20,171 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 52 treesize of output 54 [2024-11-28 04:01:20,303 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-28 04:01:20,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841485479] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:01:20,303 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:01:20,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 27 [2024-11-28 04:01:20,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430991407] [2024-11-28 04:01:20,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:01:20,304 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-28 04:01:20,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:01:20,305 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-28 04:01:20,305 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=657, Unknown=0, NotChecked=0, Total=812 [2024-11-28 04:01:20,393 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-11-28 04:01:20,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 1320 transitions, 24672 flow. Second operand has 29 states, 29 states have (on average 13.620689655172415) internal successors, (395), 29 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:01:20,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:01:20,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-11-28 04:01:20,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:01:30,184 INFO L124 PetriNetUnfolderBase]: 12165/22156 cut-off events. [2024-11-28 04:01:30,185 INFO L125 PetriNetUnfolderBase]: For 286764/286764 co-relation queries the response was YES. [2024-11-28 04:01:30,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144842 conditions, 22156 events. 12165/22156 cut-off events. For 286764/286764 co-relation queries the response was YES. Maximal size of possible extension queue 690. Compared 174894 event pairs, 1089 based on Foata normal form. 300/22343 useless extension candidates. Maximal degree in co-relation 143615. Up to 8085 conditions per place. [2024-11-28 04:01:30,499 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 902 selfloop transitions, 872 changer transitions 6/1789 dead transitions. [2024-11-28 04:01:30,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 1789 transitions, 35343 flow [2024-11-28 04:01:30,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-28 04:01:30,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-11-28 04:01:30,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 590 transitions. [2024-11-28 04:01:30,501 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3841145833333333 [2024-11-28 04:01:30,501 INFO L175 Difference]: Start difference. First operand has 387 places, 1320 transitions, 24672 flow. Second operand 32 states and 590 transitions. [2024-11-28 04:01:30,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 1789 transitions, 35343 flow [2024-11-28 04:01:36,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 1789 transitions, 34856 flow, removed 207 selfloop flow, removed 16 redundant places. [2024-11-28 04:01:36,046 INFO L231 Difference]: Finished difference. Result has 411 places, 1489 transitions, 30411 flow [2024-11-28 04:01:36,046 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=24101, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=702, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=570, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=30411, PETRI_PLACES=411, PETRI_TRANSITIONS=1489} [2024-11-28 04:01:36,047 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 365 predicate places. [2024-11-28 04:01:36,047 INFO L471 AbstractCegarLoop]: Abstraction has has 411 places, 1489 transitions, 30411 flow [2024-11-28 04:01:36,047 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 13.620689655172415) internal successors, (395), 29 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:01:36,047 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:01:36,047 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:01:36,053 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-28 04:01:36,248 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:01:36,248 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2024-11-28 04:01:36,248 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:01:36,248 INFO L85 PathProgramCache]: Analyzing trace with hash 112642567, now seen corresponding path program 4 times [2024-11-28 04:01:36,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:01:36,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40780136] [2024-11-28 04:01:36,249 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:01:36,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:01:36,287 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:01:36,287 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:01:36,626 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-28 04:01:36,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:01:36,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40780136] [2024-11-28 04:01:36,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40780136] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:01:36,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:01:36,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-28 04:01:36,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566358338] [2024-11-28 04:01:36,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:01:36,627 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 04:01:36,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:01:36,627 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 04:01:36,628 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-11-28 04:01:36,668 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-11-28 04:01:36,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 1489 transitions, 30411 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) [2024-11-28 04:01:36,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:01:36,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-11-28 04:01:36,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:01:45,724 INFO L124 PetriNetUnfolderBase]: 10277/19978 cut-off events. [2024-11-28 04:01:45,724 INFO L125 PetriNetUnfolderBase]: For 338988/339144 co-relation queries the response was YES. [2024-11-28 04:01:45,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142307 conditions, 19978 events. 10277/19978 cut-off events. For 338988/339144 co-relation queries the response was YES. Maximal size of possible extension queue 664. Compared 165654 event pairs, 657 based on Foata normal form. 228/20083 useless extension candidates. Maximal degree in co-relation 141080. Up to 10844 conditions per place. [2024-11-28 04:01:46,023 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 1304 selfloop transitions, 304 changer transitions 8/1657 dead transitions. [2024-11-28 04:01:46,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 1657 transitions, 36021 flow [2024-11-28 04:01:46,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-28 04:01:46,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-28 04:01:46,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 324 transitions. [2024-11-28 04:01:46,025 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.421875 [2024-11-28 04:01:46,025 INFO L175 Difference]: Start difference. First operand has 411 places, 1489 transitions, 30411 flow. Second operand 16 states and 324 transitions. [2024-11-28 04:01:46,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 1657 transitions, 36021 flow [2024-11-28 04:01:52,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 1657 transitions, 35319 flow, removed 176 selfloop flow, removed 11 redundant places. [2024-11-28 04:01:52,193 INFO L231 Difference]: Finished difference. Result has 417 places, 1510 transitions, 31134 flow [2024-11-28 04:01:52,194 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=29610, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=276, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=31134, PETRI_PLACES=417, PETRI_TRANSITIONS=1510} [2024-11-28 04:01:52,194 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 371 predicate places. [2024-11-28 04:01:52,195 INFO L471 AbstractCegarLoop]: Abstraction has has 417 places, 1510 transitions, 31134 flow [2024-11-28 04:01:52,195 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) [2024-11-28 04:01:52,195 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:01:52,195 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:01:52,195 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-11-28 04:01:52,195 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2024-11-28 04:01:52,196 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:01:52,196 INFO L85 PathProgramCache]: Analyzing trace with hash 449829321, now seen corresponding path program 5 times [2024-11-28 04:01:52,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:01:52,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913605579] [2024-11-28 04:01:52,196 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 04:01:52,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:01:52,228 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-28 04:01:52,228 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:01:53,337 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:01:53,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:01:53,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913605579] [2024-11-28 04:01:53,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913605579] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:01:53,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470761972] [2024-11-28 04:01:53,338 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 04:01:53,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:01:53,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:01:53,340 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:01:53,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-28 04:01:53,437 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-28 04:01:53,437 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:01:53,439 INFO L256 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-28 04:01:53,440 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:01:53,885 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 04:01:53,885 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:01:54,125 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:01:54,126 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 52 treesize of output 54 [2024-11-28 04:01:54,256 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-28 04:01:54,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470761972] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:01:54,256 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:01:54,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 9] total 39 [2024-11-28 04:01:54,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606474966] [2024-11-28 04:01:54,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:01:54,257 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-11-28 04:01:54,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:01:54,257 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-11-28 04:01:54,258 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1408, Unknown=0, NotChecked=0, Total=1640 [2024-11-28 04:01:54,504 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 48 [2024-11-28 04:01:54,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 1510 transitions, 31134 flow. Second operand has 41 states, 41 states have (on average 11.097560975609756) internal successors, (455), 41 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:01:54,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:01:54,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 48 [2024-11-28 04:01:54,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:02:08,907 INFO L124 PetriNetUnfolderBase]: 13976/25451 cut-off events. [2024-11-28 04:02:08,907 INFO L125 PetriNetUnfolderBase]: For 395106/395106 co-relation queries the response was YES. [2024-11-28 04:02:09,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178783 conditions, 25451 events. 13976/25451 cut-off events. For 395106/395106 co-relation queries the response was YES. Maximal size of possible extension queue 714. Compared 204104 event pairs, 843 based on Foata normal form. 168/25550 useless extension candidates. Maximal degree in co-relation 177492. Up to 5062 conditions per place. [2024-11-28 04:02:09,339 INFO L140 encePairwiseOnDemand]: 31/48 looper letters, 927 selfloop transitions, 1221 changer transitions 12/2169 dead transitions. [2024-11-28 04:02:09,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 2169 transitions, 44623 flow [2024-11-28 04:02:09,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2024-11-28 04:02:09,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2024-11-28 04:02:09,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 1141 transitions. [2024-11-28 04:02:09,342 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3256278538812785 [2024-11-28 04:02:09,342 INFO L175 Difference]: Start difference. First operand has 417 places, 1510 transitions, 31134 flow. Second operand 73 states and 1141 transitions. [2024-11-28 04:02:09,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 2169 transitions, 44623 flow [2024-11-28 04:02:18,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 2169 transitions, 44134 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-11-28 04:02:18,059 INFO L231 Difference]: Finished difference. Result has 497 places, 1696 transitions, 38523 flow [2024-11-28 04:02:18,060 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=30590, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1029, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=423, PETRI_DIFFERENCE_SUBTRAHEND_STATES=73, PETRI_FLOW=38523, PETRI_PLACES=497, PETRI_TRANSITIONS=1696} [2024-11-28 04:02:18,061 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 451 predicate places. [2024-11-28 04:02:18,061 INFO L471 AbstractCegarLoop]: Abstraction has has 497 places, 1696 transitions, 38523 flow [2024-11-28 04:02:18,061 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 11.097560975609756) internal successors, (455), 41 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:02:18,061 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:02:18,061 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:02:18,069 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-28 04:02:18,264 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-28 04:02:18,264 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2024-11-28 04:02:18,265 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:02:18,265 INFO L85 PathProgramCache]: Analyzing trace with hash 236191607, now seen corresponding path program 6 times [2024-11-28 04:02:18,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:02:18,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37161245] [2024-11-28 04:02:18,265 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 04:02:18,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:02:18,288 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-11-28 04:02:18,288 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:02:18,581 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-28 04:02:18,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:02:18,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37161245] [2024-11-28 04:02:18,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37161245] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:02:18,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819663311] [2024-11-28 04:02:18,581 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 04:02:18,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:02:18,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:02:18,584 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:02:18,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-28 04:02:18,696 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-11-28 04:02:18,697 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:02:18,698 INFO L256 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-28 04:02:18,700 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:02:19,118 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 04:02:19,118 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:02:19,372 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:02:19,373 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 51 treesize of output 53 [2024-11-28 04:02:19,508 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-28 04:02:19,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819663311] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:02:19,509 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:02:19,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 9] total 29 [2024-11-28 04:02:19,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824593551] [2024-11-28 04:02:19,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:02:19,510 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-28 04:02:19,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:02:19,514 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-28 04:02:19,514 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=779, Unknown=0, NotChecked=0, Total=930 [2024-11-28 04:02:19,740 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 48 [2024-11-28 04:02:19,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 1696 transitions, 38523 flow. Second operand has 31 states, 31 states have (on average 12.129032258064516) internal successors, (376), 31 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:02:19,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:02:19,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 48 [2024-11-28 04:02:19,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:02:34,582 INFO L124 PetriNetUnfolderBase]: 12375/23744 cut-off events. [2024-11-28 04:02:34,582 INFO L125 PetriNetUnfolderBase]: For 527381/527667 co-relation queries the response was YES. [2024-11-28 04:02:34,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 185735 conditions, 23744 events. 12375/23744 cut-off events. For 527381/527667 co-relation queries the response was YES. Maximal size of possible extension queue 734. Compared 199433 event pairs, 1157 based on Foata normal form. 130/23533 useless extension candidates. Maximal degree in co-relation 184427. Up to 11004 conditions per place. [2024-11-28 04:02:35,004 INFO L140 encePairwiseOnDemand]: 33/48 looper letters, 857 selfloop transitions, 1265 changer transitions 25/2200 dead transitions. [2024-11-28 04:02:35,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 568 places, 2200 transitions, 49810 flow [2024-11-28 04:02:35,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2024-11-28 04:02:35,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2024-11-28 04:02:35,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 1137 transitions. [2024-11-28 04:02:35,272 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3289930555555556 [2024-11-28 04:02:35,272 INFO L175 Difference]: Start difference. First operand has 497 places, 1696 transitions, 38523 flow. Second operand 72 states and 1137 transitions. [2024-11-28 04:02:35,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 568 places, 2200 transitions, 49810 flow [2024-11-28 04:02:45,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 526 places, 2200 transitions, 48204 flow, removed 320 selfloop flow, removed 42 redundant places. [2024-11-28 04:02:45,354 INFO L231 Difference]: Finished difference. Result has 541 places, 1860 transitions, 43927 flow [2024-11-28 04:02:45,355 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=36950, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1686, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1091, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=559, PETRI_DIFFERENCE_SUBTRAHEND_STATES=72, PETRI_FLOW=43927, PETRI_PLACES=541, PETRI_TRANSITIONS=1860} [2024-11-28 04:02:45,355 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 495 predicate places. [2024-11-28 04:02:45,355 INFO L471 AbstractCegarLoop]: Abstraction has has 541 places, 1860 transitions, 43927 flow [2024-11-28 04:02:45,356 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 12.129032258064516) internal successors, (376), 31 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:02:45,356 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:02:45,356 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:02:45,362 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-28 04:02:45,556 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:02:45,556 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2024-11-28 04:02:45,557 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:02:45,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1662314955, now seen corresponding path program 7 times [2024-11-28 04:02:45,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:02:45,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781734982] [2024-11-28 04:02:45,557 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 04:02:45,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:02:45,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:02:46,973 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 13 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:02:46,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:02:46,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781734982] [2024-11-28 04:02:46,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781734982] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:02:46,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754308513] [2024-11-28 04:02:46,973 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 04:02:46,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:02:46,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:02:46,975 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:02:46,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f2c363e-7826-4a5f-bf8d-77275c504351/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-28 04:02:47,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:02:47,066 INFO L256 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-28 04:02:47,067 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:02:47,540 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 04:02:47,540 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:02:47,833 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:02:47,833 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 51 treesize of output 53 [2024-11-28 04:02:47,974 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-28 04:02:47,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754308513] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:02:47,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:02:47,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 13, 9] total 41 [2024-11-28 04:02:47,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658786467] [2024-11-28 04:02:47,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:02:47,975 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-28 04:02:47,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:02:47,975 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-28 04:02:47,976 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1602, Unknown=0, NotChecked=0, Total=1806 [2024-11-28 04:02:48,408 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 48 [2024-11-28 04:02:48,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 541 places, 1860 transitions, 43927 flow. Second operand has 43 states, 43 states have (on average 11.930232558139535) internal successors, (513), 43 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:02:48,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:02:48,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 48 [2024-11-28 04:02:48,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand