./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --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 c80601716e9c0111d78d12f0a88108c91b0aa7215f8e775685e33490f22c8502 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:41:52,529 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:41:52,623 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-11-06 22:41:52,641 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:41:52,641 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:41:52,703 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:41:52,704 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:41:52,704 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:41:52,705 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:41:52,711 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:41:52,712 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:41:52,713 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:41:52,713 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:41:52,715 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:41:52,716 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:41:52,716 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:41:52,717 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:41:52,717 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:41:52,718 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:41:52,718 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:41:52,719 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:41:52,720 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:41:52,720 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-06 22:41:52,721 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 22:41:52,721 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:41:52,722 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:41:52,722 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:41:52,723 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:41:52,724 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:41:52,724 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:41:52,725 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:41:52,726 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:41:52,726 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:41:52,726 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:41:52,736 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:41:52,736 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:41:52,736 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:41:52,737 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:41:52,737 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:41:52,737 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:41:52,738 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:41:52,738 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c80601716e9c0111d78d12f0a88108c91b0aa7215f8e775685e33490f22c8502 [2023-11-06 22:41:53,064 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:41:53,103 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:41:53,106 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:41:53,108 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:41:53,108 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:41:53,110 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c [2023-11-06 22:41:56,392 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:41:56,684 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:41:56,685 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c [2023-11-06 22:41:56,698 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/data/e63ae3d2f/3bc1323d8ed8417686df1f864f1a5ebb/FLAGb79bc23cb [2023-11-06 22:41:56,715 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/data/e63ae3d2f/3bc1323d8ed8417686df1f864f1a5ebb [2023-11-06 22:41:56,721 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:41:56,723 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:41:56,728 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:41:56,728 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:41:56,733 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:41:56,734 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:41:56" (1/1) ... [2023-11-06 22:41:56,735 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ca83968 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:41:56, skipping insertion in model container [2023-11-06 22:41:56,735 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:41:56" (1/1) ... [2023-11-06 22:41:56,770 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:41:57,008 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:41:57,019 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:41:57,048 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:41:57,058 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:41:57,058 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:41:57,066 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:41:57,067 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:41:57 WrapperNode [2023-11-06 22:41:57,067 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:41:57,069 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:41:57,069 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:41:57,069 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:41:57,077 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:41:57" (1/1) ... [2023-11-06 22:41:57,086 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:41:57" (1/1) ... [2023-11-06 22:41:57,116 INFO L138 Inliner]: procedures = 25, calls = 40, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 183 [2023-11-06 22:41:57,119 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:41:57,120 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:41:57,121 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:41:57,121 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:41:57,131 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:41:57" (1/1) ... [2023-11-06 22:41:57,131 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:41:57" (1/1) ... [2023-11-06 22:41:57,135 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:41:57" (1/1) ... [2023-11-06 22:41:57,136 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:41:57" (1/1) ... [2023-11-06 22:41:57,144 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:41:57" (1/1) ... [2023-11-06 22:41:57,149 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:41:57" (1/1) ... [2023-11-06 22:41:57,151 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:41:57" (1/1) ... [2023-11-06 22:41:57,153 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:41:57" (1/1) ... [2023-11-06 22:41:57,157 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:41:57,158 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:41:57,158 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:41:57,158 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:41:57,159 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:41:57" (1/1) ... [2023-11-06 22:41:57,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:41:57,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:41:57,196 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:41:57,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:41:57,258 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:41:57,258 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:41:57,258 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:41:57,258 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:41:57,259 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 22:41:57,259 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 22:41:57,259 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 22:41:57,259 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 22:41:57,259 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:41:57,259 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-06 22:41:57,260 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-06 22:41:57,260 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 22:41:57,262 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:41:57,263 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:41:57,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:41:57,264 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 22:41:57,394 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:41:57,396 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:41:57,801 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:41:57,974 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:41:57,974 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-06 22:41:57,977 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:41:57 BoogieIcfgContainer [2023-11-06 22:41:57,977 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:41:57,980 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:41:57,980 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:41:57,989 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:41:57,989 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:41:56" (1/3) ... [2023-11-06 22:41:57,990 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a49da1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:41:57, skipping insertion in model container [2023-11-06 22:41:57,990 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:41:57" (2/3) ... [2023-11-06 22:41:57,990 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a49da1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:41:57, skipping insertion in model container [2023-11-06 22:41:57,991 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:41:57" (3/3) ... [2023-11-06 22:41:57,992 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-queue-add-2-nl.wvr.c [2023-11-06 22:41:58,002 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 22:41:58,014 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:41:58,015 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2023-11-06 22:41:58,015 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:41:58,174 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-06 22:41:58,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 164 places, 168 transitions, 350 flow [2023-11-06 22:41:58,323 INFO L124 PetriNetUnfolderBase]: 11/166 cut-off events. [2023-11-06 22:41:58,323 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:41:58,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 175 conditions, 166 events. 11/166 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 151 event pairs, 0 based on Foata normal form. 0/143 useless extension candidates. Maximal degree in co-relation 121. Up to 3 conditions per place. [2023-11-06 22:41:58,330 INFO L82 GeneralOperation]: Start removeDead. Operand has 164 places, 168 transitions, 350 flow [2023-11-06 22:41:58,343 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 141 places, 144 transitions, 297 flow [2023-11-06 22:41:58,346 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:41:58,364 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 141 places, 144 transitions, 297 flow [2023-11-06 22:41:58,368 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 141 places, 144 transitions, 297 flow [2023-11-06 22:41:58,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 141 places, 144 transitions, 297 flow [2023-11-06 22:41:58,417 INFO L124 PetriNetUnfolderBase]: 10/144 cut-off events. [2023-11-06 22:41:58,418 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 22:41:58,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152 conditions, 144 events. 10/144 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 149 event pairs, 0 based on Foata normal form. 0/122 useless extension candidates. Maximal degree in co-relation 121. Up to 3 conditions per place. [2023-11-06 22:41:58,421 INFO L119 LiptonReduction]: Number of co-enabled transitions 1404 [2023-11-06 22:42:05,523 INFO L134 LiptonReduction]: Checked pairs total: 1834 [2023-11-06 22:42:05,523 INFO L136 LiptonReduction]: Total number of compositions: 161 [2023-11-06 22:42:05,539 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:42:05,549 INFO L357 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, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@4b614e63, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:42:05,549 INFO L358 AbstractCegarLoop]: Starting to check reachability of 24 error locations. [2023-11-06 22:42:05,552 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:42:05,555 INFO L124 PetriNetUnfolderBase]: 1/2 cut-off events. [2023-11-06 22:42:05,555 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:42:05,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:42:05,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 22:42:05,557 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-06 22:42:05,562 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:42:05,562 INFO L85 PathProgramCache]: Analyzing trace with hash 24379, now seen corresponding path program 1 times [2023-11-06 22:42:05,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:42:05,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734919275] [2023-11-06 22:42:05,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:05,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:42:05,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:05,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:42:05,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:42:05,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734919275] [2023-11-06 22:42:05,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734919275] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:42:05,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:42:05,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:42:05,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098002613] [2023-11-06 22:42:05,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:42:05,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:42:05,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:42:06,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:42:06,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:42:06,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 329 [2023-11-06 22:42:06,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 27 transitions, 63 flow. Second operand has 3 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 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) [2023-11-06 22:42:06,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:42:06,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 329 [2023-11-06 22:42:06,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:42:06,255 INFO L124 PetriNetUnfolderBase]: 219/334 cut-off events. [2023-11-06 22:42:06,256 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-11-06 22:42:06,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 693 conditions, 334 events. 219/334 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 1281 event pairs, 122 based on Foata normal form. 0/130 useless extension candidates. Maximal degree in co-relation 617. Up to 333 conditions per place. [2023-11-06 22:42:06,267 INFO L140 encePairwiseOnDemand]: 321/329 looper letters, 22 selfloop transitions, 3 changer transitions 0/26 dead transitions. [2023-11-06 22:42:06,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 26 transitions, 111 flow [2023-11-06 22:42:06,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:42:06,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:42:06,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 453 transitions. [2023-11-06 22:42:06,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45896656534954405 [2023-11-06 22:42:06,302 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 453 transitions. [2023-11-06 22:42:06,303 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 453 transitions. [2023-11-06 22:42:06,308 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:42:06,311 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 453 transitions. [2023-11-06 22:42:06,317 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 151.0) internal successors, (453), 3 states have internal predecessors, (453), 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) [2023-11-06 22:42:06,326 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 329.0) internal successors, (1316), 4 states have internal predecessors, (1316), 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) [2023-11-06 22:42:06,328 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 329.0) internal successors, (1316), 4 states have internal predecessors, (1316), 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) [2023-11-06 22:42:06,331 INFO L175 Difference]: Start difference. First operand has 31 places, 27 transitions, 63 flow. Second operand 3 states and 453 transitions. [2023-11-06 22:42:06,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 26 transitions, 111 flow [2023-11-06 22:42:06,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 26 transitions, 106 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-06 22:42:06,338 INFO L231 Difference]: Finished difference. Result has 28 places, 26 transitions, 73 flow [2023-11-06 22:42:06,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=329, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=73, PETRI_PLACES=28, PETRI_TRANSITIONS=26} [2023-11-06 22:42:06,347 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, -3 predicate places. [2023-11-06 22:42:06,348 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 26 transitions, 73 flow [2023-11-06 22:42:06,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 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) [2023-11-06 22:42:06,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:42:06,350 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-06 22:42:06,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:42:06,351 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-06 22:42:06,352 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:42:06,352 INFO L85 PathProgramCache]: Analyzing trace with hash 757360, now seen corresponding path program 1 times [2023-11-06 22:42:06,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:42:06,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209025217] [2023-11-06 22:42:06,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:06,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:42:06,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:06,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:42:06,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:42:06,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209025217] [2023-11-06 22:42:06,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209025217] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:42:06,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3887808] [2023-11-06 22:42:06,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:06,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:42:06,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:42:06,504 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:42:06,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:42:06,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:06,627 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:42:06,632 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:42:06,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:42:06,672 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:42:06,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:42:06,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3887808] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:42:06,693 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:42:06,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-11-06 22:42:06,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351203407] [2023-11-06 22:42:06,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:42:06,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:42:06,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:42:06,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:42:06,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:42:06,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 329 [2023-11-06 22:42:06,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 26 transitions, 73 flow. Second operand has 7 states, 7 states have (on average 142.14285714285714) internal successors, (995), 7 states have internal predecessors, (995), 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) [2023-11-06 22:42:06,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:42:06,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 329 [2023-11-06 22:42:06,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:42:06,933 INFO L124 PetriNetUnfolderBase]: 225/343 cut-off events. [2023-11-06 22:42:06,934 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-06 22:42:06,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 722 conditions, 343 events. 225/343 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 1314 event pairs, 122 based on Foata normal form. 0/133 useless extension candidates. Maximal degree in co-relation 668. Up to 335 conditions per place. [2023-11-06 22:42:06,938 INFO L140 encePairwiseOnDemand]: 324/329 looper letters, 21 selfloop transitions, 13 changer transitions 0/35 dead transitions. [2023-11-06 22:42:06,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 35 transitions, 177 flow [2023-11-06 22:42:06,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:42:06,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 22:42:06,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1024 transitions. [2023-11-06 22:42:06,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44463742943986106 [2023-11-06 22:42:06,945 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1024 transitions. [2023-11-06 22:42:06,945 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1024 transitions. [2023-11-06 22:42:06,946 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:42:06,946 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1024 transitions. [2023-11-06 22:42:06,950 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 146.28571428571428) internal successors, (1024), 7 states have internal predecessors, (1024), 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) [2023-11-06 22:42:06,957 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 329.0) internal successors, (2632), 8 states have internal predecessors, (2632), 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) [2023-11-06 22:42:06,960 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 329.0) internal successors, (2632), 8 states have internal predecessors, (2632), 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) [2023-11-06 22:42:06,960 INFO L175 Difference]: Start difference. First operand has 28 places, 26 transitions, 73 flow. Second operand 7 states and 1024 transitions. [2023-11-06 22:42:06,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 35 transitions, 177 flow [2023-11-06 22:42:06,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 35 transitions, 172 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-06 22:42:06,963 INFO L231 Difference]: Finished difference. Result has 36 places, 35 transitions, 152 flow [2023-11-06 22:42:06,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=329, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=152, PETRI_PLACES=36, PETRI_TRANSITIONS=35} [2023-11-06 22:42:06,965 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 5 predicate places. [2023-11-06 22:42:06,965 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 35 transitions, 152 flow [2023-11-06 22:42:06,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 142.14285714285714) internal successors, (995), 7 states have internal predecessors, (995), 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) [2023-11-06 22:42:06,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:42:06,967 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1] [2023-11-06 22:42:06,979 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-06 22:42:07,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:42:07,175 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-06 22:42:07,175 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:42:07,175 INFO L85 PathProgramCache]: Analyzing trace with hash 23479227, now seen corresponding path program 1 times [2023-11-06 22:42:07,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:42:07,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247728570] [2023-11-06 22:42:07,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:07,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:42:07,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:07,346 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:42:07,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:42:07,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247728570] [2023-11-06 22:42:07,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247728570] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:42:07,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401345825] [2023-11-06 22:42:07,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:07,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:42:07,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:42:07,350 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:42:07,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:42:07,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:07,437 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 22:42:07,438 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:42:07,454 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:42:07,454 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:42:07,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401345825] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:42:07,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:42:07,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2023-11-06 22:42:07,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642525847] [2023-11-06 22:42:07,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:42:07,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:42:07,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:42:07,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:42:07,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:42:07,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 329 [2023-11-06 22:42:07,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 35 transitions, 152 flow. Second operand has 5 states, 5 states have (on average 141.8) internal successors, (709), 5 states have internal predecessors, (709), 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) [2023-11-06 22:42:07,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:42:07,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 329 [2023-11-06 22:42:07,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:42:07,705 INFO L124 PetriNetUnfolderBase]: 222/339 cut-off events. [2023-11-06 22:42:07,705 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-06 22:42:07,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 730 conditions, 339 events. 222/339 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 1313 event pairs, 122 based on Foata normal form. 0/137 useless extension candidates. Maximal degree in co-relation 694. Up to 332 conditions per place. [2023-11-06 22:42:07,712 INFO L140 encePairwiseOnDemand]: 325/329 looper letters, 22 selfloop transitions, 8 changer transitions 0/31 dead transitions. [2023-11-06 22:42:07,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 31 transitions, 185 flow [2023-11-06 22:42:07,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:42:07,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:42:07,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 733 transitions. [2023-11-06 22:42:07,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44559270516717325 [2023-11-06 22:42:07,746 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 733 transitions. [2023-11-06 22:42:07,746 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 733 transitions. [2023-11-06 22:42:07,747 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:42:07,748 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 733 transitions. [2023-11-06 22:42:07,750 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 146.6) internal successors, (733), 5 states have internal predecessors, (733), 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) [2023-11-06 22:42:07,758 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 329.0) internal successors, (1974), 6 states have internal predecessors, (1974), 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) [2023-11-06 22:42:07,760 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 329.0) internal successors, (1974), 6 states have internal predecessors, (1974), 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) [2023-11-06 22:42:07,761 INFO L175 Difference]: Start difference. First operand has 36 places, 35 transitions, 152 flow. Second operand 5 states and 733 transitions. [2023-11-06 22:42:07,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 31 transitions, 185 flow [2023-11-06 22:42:07,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 31 transitions, 164 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-11-06 22:42:07,766 INFO L231 Difference]: Finished difference. Result has 37 places, 31 transitions, 120 flow [2023-11-06 22:42:07,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=329, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=120, PETRI_PLACES=37, PETRI_TRANSITIONS=31} [2023-11-06 22:42:07,769 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 6 predicate places. [2023-11-06 22:42:07,769 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 31 transitions, 120 flow [2023-11-06 22:42:07,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 141.8) internal successors, (709), 5 states have internal predecessors, (709), 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) [2023-11-06 22:42:07,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:42:07,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 22:42:07,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:42:07,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:42:07,986 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-06 22:42:07,986 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:42:07,987 INFO L85 PathProgramCache]: Analyzing trace with hash 727941843, now seen corresponding path program 1 times [2023-11-06 22:42:07,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:42:07,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303275292] [2023-11-06 22:42:07,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:07,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:42:08,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:08,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:42:08,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:42:08,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303275292] [2023-11-06 22:42:08,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303275292] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:42:08,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:42:08,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:42:08,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403296378] [2023-11-06 22:42:08,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:42:08,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:42:08,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:42:08,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:42:08,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:42:08,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 329 [2023-11-06 22:42:08,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 31 transitions, 120 flow. Second operand has 4 states, 4 states have (on average 139.0) internal successors, (556), 4 states have internal predecessors, (556), 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) [2023-11-06 22:42:08,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:42:08,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 329 [2023-11-06 22:42:08,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:42:08,332 INFO L124 PetriNetUnfolderBase]: 222/347 cut-off events. [2023-11-06 22:42:08,332 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-11-06 22:42:08,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 747 conditions, 347 events. 222/347 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 1323 event pairs, 123 based on Foata normal form. 7/155 useless extension candidates. Maximal degree in co-relation 713. Up to 337 conditions per place. [2023-11-06 22:42:08,339 INFO L140 encePairwiseOnDemand]: 315/329 looper letters, 27 selfloop transitions, 2 changer transitions 6/36 dead transitions. [2023-11-06 22:42:08,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 36 transitions, 203 flow [2023-11-06 22:42:08,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:42:08,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:42:08,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 592 transitions. [2023-11-06 22:42:08,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44984802431610943 [2023-11-06 22:42:08,343 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 592 transitions. [2023-11-06 22:42:08,347 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 592 transitions. [2023-11-06 22:42:08,347 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:42:08,348 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 592 transitions. [2023-11-06 22:42:08,350 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 148.0) internal successors, (592), 4 states have internal predecessors, (592), 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) [2023-11-06 22:42:08,353 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 329.0) internal successors, (1645), 5 states have internal predecessors, (1645), 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) [2023-11-06 22:42:08,355 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 329.0) internal successors, (1645), 5 states have internal predecessors, (1645), 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) [2023-11-06 22:42:08,355 INFO L175 Difference]: Start difference. First operand has 37 places, 31 transitions, 120 flow. Second operand 4 states and 592 transitions. [2023-11-06 22:42:08,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 36 transitions, 203 flow [2023-11-06 22:42:08,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 36 transitions, 191 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-06 22:42:08,363 INFO L231 Difference]: Finished difference. Result has 38 places, 30 transitions, 129 flow [2023-11-06 22:42:08,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=329, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=129, PETRI_PLACES=38, PETRI_TRANSITIONS=30} [2023-11-06 22:42:08,365 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 7 predicate places. [2023-11-06 22:42:08,365 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 30 transitions, 129 flow [2023-11-06 22:42:08,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 139.0) internal successors, (556), 4 states have internal predecessors, (556), 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) [2023-11-06 22:42:08,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:42:08,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 22:42:08,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 22:42:08,367 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-06 22:42:08,367 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:42:08,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1088835797, now seen corresponding path program 1 times [2023-11-06 22:42:08,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:42:08,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212757434] [2023-11-06 22:42:08,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:08,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:42:08,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:08,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:42:08,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:42:08,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212757434] [2023-11-06 22:42:08,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212757434] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:42:08,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46815454] [2023-11-06 22:42:08,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:08,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:42:08,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:42:08,497 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:42:08,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:42:08,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:08,586 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:42:08,588 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:42:08,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:42:08,607 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:42:08,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46815454] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:42:08,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:42:08,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2023-11-06 22:42:08,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485541721] [2023-11-06 22:42:08,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:42:08,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:42:08,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:42:08,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:42:08,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:42:08,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 329 [2023-11-06 22:42:08,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 30 transitions, 129 flow. Second operand has 3 states, 3 states have (on average 145.66666666666666) internal successors, (437), 3 states have internal predecessors, (437), 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) [2023-11-06 22:42:08,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:42:08,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 329 [2023-11-06 22:42:08,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:42:08,697 INFO L124 PetriNetUnfolderBase]: 132/209 cut-off events. [2023-11-06 22:42:08,697 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-06 22:42:08,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 599 conditions, 209 events. 132/209 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 678 event pairs, 71 based on Foata normal form. 0/103 useless extension candidates. Maximal degree in co-relation 582. Up to 208 conditions per place. [2023-11-06 22:42:08,700 INFO L140 encePairwiseOnDemand]: 325/329 looper letters, 25 selfloop transitions, 1 changer transitions 0/27 dead transitions. [2023-11-06 22:42:08,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 27 transitions, 169 flow [2023-11-06 22:42:08,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:42:08,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:42:08,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 454 transitions. [2023-11-06 22:42:08,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45997973657548125 [2023-11-06 22:42:08,703 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 454 transitions. [2023-11-06 22:42:08,703 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 454 transitions. [2023-11-06 22:42:08,704 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:42:08,704 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 454 transitions. [2023-11-06 22:42:08,705 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 151.33333333333334) internal successors, (454), 3 states have internal predecessors, (454), 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) [2023-11-06 22:42:08,708 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 329.0) internal successors, (1316), 4 states have internal predecessors, (1316), 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) [2023-11-06 22:42:08,709 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 329.0) internal successors, (1316), 4 states have internal predecessors, (1316), 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) [2023-11-06 22:42:08,709 INFO L175 Difference]: Start difference. First operand has 38 places, 30 transitions, 129 flow. Second operand 3 states and 454 transitions. [2023-11-06 22:42:08,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 27 transitions, 169 flow [2023-11-06 22:42:08,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 27 transitions, 165 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:42:08,715 INFO L231 Difference]: Finished difference. Result has 34 places, 27 transitions, 115 flow [2023-11-06 22:42:08,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=329, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=115, PETRI_PLACES=34, PETRI_TRANSITIONS=27} [2023-11-06 22:42:08,718 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 3 predicate places. [2023-11-06 22:42:08,719 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 27 transitions, 115 flow [2023-11-06 22:42:08,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 145.66666666666666) internal successors, (437), 3 states have internal predecessors, (437), 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) [2023-11-06 22:42:08,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:42:08,720 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-11-06 22:42:08,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:42:08,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:42:08,926 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-06 22:42:08,926 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:42:08,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1088751692, now seen corresponding path program 2 times [2023-11-06 22:42:08,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:42:08,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496924567] [2023-11-06 22:42:08,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:08,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:42:08,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:09,047 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:42:09,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:42:09,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496924567] [2023-11-06 22:42:09,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496924567] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:42:09,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005725442] [2023-11-06 22:42:09,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:42:09,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:42:09,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:42:09,051 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:42:09,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:42:09,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 22:42:09,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:42:09,138 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:42:09,139 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:42:09,157 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-06 22:42:09,157 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:42:09,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005725442] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:42:09,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:42:09,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2023-11-06 22:42:09,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017737149] [2023-11-06 22:42:09,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:42:09,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:42:09,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:42:09,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:42:09,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:42:09,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 329 [2023-11-06 22:42:09,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 27 transitions, 115 flow. Second operand has 3 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 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) [2023-11-06 22:42:09,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:42:09,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 329 [2023-11-06 22:42:09,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:42:09,255 INFO L124 PetriNetUnfolderBase]: 132/208 cut-off events. [2023-11-06 22:42:09,255 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-06 22:42:09,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 592 conditions, 208 events. 132/208 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 659 event pairs, 71 based on Foata normal form. 1/103 useless extension candidates. Maximal degree in co-relation 579. Up to 202 conditions per place. [2023-11-06 22:42:09,258 INFO L140 encePairwiseOnDemand]: 326/329 looper letters, 20 selfloop transitions, 5 changer transitions 0/26 dead transitions. [2023-11-06 22:42:09,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 26 transitions, 155 flow [2023-11-06 22:42:09,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:42:09,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:42:09,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 448 transitions. [2023-11-06 22:42:09,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45390070921985815 [2023-11-06 22:42:09,261 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 448 transitions. [2023-11-06 22:42:09,261 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 448 transitions. [2023-11-06 22:42:09,262 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:42:09,262 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 448 transitions. [2023-11-06 22:42:09,264 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 149.33333333333334) internal successors, (448), 3 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:09,266 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 329.0) internal successors, (1316), 4 states have internal predecessors, (1316), 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) [2023-11-06 22:42:09,267 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 329.0) internal successors, (1316), 4 states have internal predecessors, (1316), 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) [2023-11-06 22:42:09,267 INFO L175 Difference]: Start difference. First operand has 34 places, 27 transitions, 115 flow. Second operand 3 states and 448 transitions. [2023-11-06 22:42:09,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 26 transitions, 155 flow [2023-11-06 22:42:09,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 26 transitions, 139 flow, removed 2 selfloop flow, removed 5 redundant places. [2023-11-06 22:42:09,269 INFO L231 Difference]: Finished difference. Result has 30 places, 26 transitions, 99 flow [2023-11-06 22:42:09,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=329, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=99, PETRI_PLACES=30, PETRI_TRANSITIONS=26} [2023-11-06 22:42:09,270 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, -1 predicate places. [2023-11-06 22:42:09,271 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 26 transitions, 99 flow [2023-11-06 22:42:09,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 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) [2023-11-06 22:42:09,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:42:09,271 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 22:42:09,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:42:09,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:42:09,477 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-06 22:42:09,478 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:42:09,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1088835898, now seen corresponding path program 1 times [2023-11-06 22:42:09,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:42:09,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511002315] [2023-11-06 22:42:09,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:09,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:42:09,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:09,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:42:09,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:42:09,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511002315] [2023-11-06 22:42:09,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511002315] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:42:09,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:42:09,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:42:09,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997736879] [2023-11-06 22:42:09,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:42:09,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:42:09,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:42:09,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:42:09,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:42:09,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 329 [2023-11-06 22:42:09,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 26 transitions, 99 flow. Second operand has 3 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 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) [2023-11-06 22:42:09,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:42:09,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 329 [2023-11-06 22:42:09,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:42:09,628 INFO L124 PetriNetUnfolderBase]: 129/217 cut-off events. [2023-11-06 22:42:09,628 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2023-11-06 22:42:09,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 593 conditions, 217 events. 129/217 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 665 event pairs, 72 based on Foata normal form. 0/127 useless extension candidates. Maximal degree in co-relation 583. Up to 189 conditions per place. [2023-11-06 22:42:09,631 INFO L140 encePairwiseOnDemand]: 324/329 looper letters, 33 selfloop transitions, 3 changer transitions 0/36 dead transitions. [2023-11-06 22:42:09,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 36 transitions, 205 flow [2023-11-06 22:42:09,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:42:09,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:42:09,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 460 transitions. [2023-11-06 22:42:09,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46605876393110435 [2023-11-06 22:42:09,634 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 460 transitions. [2023-11-06 22:42:09,634 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 460 transitions. [2023-11-06 22:42:09,635 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:42:09,635 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 460 transitions. [2023-11-06 22:42:09,636 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 153.33333333333334) internal successors, (460), 3 states have internal predecessors, (460), 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) [2023-11-06 22:42:09,639 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 329.0) internal successors, (1316), 4 states have internal predecessors, (1316), 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) [2023-11-06 22:42:09,640 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 329.0) internal successors, (1316), 4 states have internal predecessors, (1316), 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) [2023-11-06 22:42:09,640 INFO L175 Difference]: Start difference. First operand has 30 places, 26 transitions, 99 flow. Second operand 3 states and 460 transitions. [2023-11-06 22:42:09,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 36 transitions, 205 flow [2023-11-06 22:42:09,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 36 transitions, 195 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:42:09,642 INFO L231 Difference]: Finished difference. Result has 31 places, 28 transitions, 114 flow [2023-11-06 22:42:09,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=329, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=31, PETRI_TRANSITIONS=28} [2023-11-06 22:42:09,643 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 0 predicate places. [2023-11-06 22:42:09,644 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 28 transitions, 114 flow [2023-11-06 22:42:09,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 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) [2023-11-06 22:42:09,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:42:09,644 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:42:09,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 22:42:09,645 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-06 22:42:09,645 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:42:09,645 INFO L85 PathProgramCache]: Analyzing trace with hash -605823692, now seen corresponding path program 1 times [2023-11-06 22:42:09,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:42:09,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745173486] [2023-11-06 22:42:09,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:09,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:42:09,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:09,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:42:09,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:42:09,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745173486] [2023-11-06 22:42:09,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745173486] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:42:09,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:42:09,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:42:09,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522474664] [2023-11-06 22:42:09,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:42:09,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:42:09,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:42:09,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:42:09,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:42:09,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 329 [2023-11-06 22:42:09,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 28 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 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) [2023-11-06 22:42:09,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:42:09,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 329 [2023-11-06 22:42:09,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:42:09,775 INFO L124 PetriNetUnfolderBase]: 112/188 cut-off events. [2023-11-06 22:42:09,775 INFO L125 PetriNetUnfolderBase]: For 45/45 co-relation queries the response was YES. [2023-11-06 22:42:09,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 605 conditions, 188 events. 112/188 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 577 event pairs, 27 based on Foata normal form. 0/116 useless extension candidates. Maximal degree in co-relation 595. Up to 109 conditions per place. [2023-11-06 22:42:09,778 INFO L140 encePairwiseOnDemand]: 326/329 looper letters, 32 selfloop transitions, 3 changer transitions 0/35 dead transitions. [2023-11-06 22:42:09,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 35 transitions, 204 flow [2023-11-06 22:42:09,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:42:09,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:42:09,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 456 transitions. [2023-11-06 22:42:09,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46200607902735563 [2023-11-06 22:42:09,781 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 456 transitions. [2023-11-06 22:42:09,781 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 456 transitions. [2023-11-06 22:42:09,782 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:42:09,782 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 456 transitions. [2023-11-06 22:42:09,783 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 152.0) internal successors, (456), 3 states have internal predecessors, (456), 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) [2023-11-06 22:42:09,786 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 329.0) internal successors, (1316), 4 states have internal predecessors, (1316), 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) [2023-11-06 22:42:09,787 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 329.0) internal successors, (1316), 4 states have internal predecessors, (1316), 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) [2023-11-06 22:42:09,787 INFO L175 Difference]: Start difference. First operand has 31 places, 28 transitions, 114 flow. Second operand 3 states and 456 transitions. [2023-11-06 22:42:09,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 35 transitions, 204 flow [2023-11-06 22:42:09,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 35 transitions, 199 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-06 22:42:09,789 INFO L231 Difference]: Finished difference. Result has 31 places, 27 transitions, 109 flow [2023-11-06 22:42:09,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=329, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=109, PETRI_PLACES=31, PETRI_TRANSITIONS=27} [2023-11-06 22:42:09,790 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 0 predicate places. [2023-11-06 22:42:09,791 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 27 transitions, 109 flow [2023-11-06 22:42:09,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 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) [2023-11-06 22:42:09,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:42:09,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:42:09,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-06 22:42:09,792 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-06 22:42:09,792 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:42:09,793 INFO L85 PathProgramCache]: Analyzing trace with hash -605823674, now seen corresponding path program 1 times [2023-11-06 22:42:09,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:42:09,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426922526] [2023-11-06 22:42:09,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:09,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:42:09,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:09,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:42:09,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:42:09,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426922526] [2023-11-06 22:42:09,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426922526] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:42:09,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750556369] [2023-11-06 22:42:09,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:09,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:42:09,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:42:09,855 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:42:09,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:42:09,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:09,952 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:42:09,953 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:42:09,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:42:09,962 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:42:09,981 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:42:09,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750556369] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:42:09,981 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:42:09,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-06 22:42:09,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454955049] [2023-11-06 22:42:09,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:42:09,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:42:09,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:42:09,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:42:09,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:42:10,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 329 [2023-11-06 22:42:10,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 27 transitions, 109 flow. Second operand has 7 states, 7 states have (on average 144.71428571428572) internal successors, (1013), 7 states have internal predecessors, (1013), 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) [2023-11-06 22:42:10,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:42:10,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 329 [2023-11-06 22:42:10,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:42:10,175 INFO L124 PetriNetUnfolderBase]: 199/311 cut-off events. [2023-11-06 22:42:10,175 INFO L125 PetriNetUnfolderBase]: For 118/118 co-relation queries the response was YES. [2023-11-06 22:42:10,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1061 conditions, 311 events. 199/311 cut-off events. For 118/118 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 939 event pairs, 57 based on Foata normal form. 0/245 useless extension candidates. Maximal degree in co-relation 1051. Up to 205 conditions per place. [2023-11-06 22:42:10,179 INFO L140 encePairwiseOnDemand]: 325/329 looper letters, 56 selfloop transitions, 9 changer transitions 0/65 dead transitions. [2023-11-06 22:42:10,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 65 transitions, 385 flow [2023-11-06 22:42:10,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:42:10,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:42:10,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 919 transitions. [2023-11-06 22:42:10,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4655521783181358 [2023-11-06 22:42:10,183 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 919 transitions. [2023-11-06 22:42:10,184 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 919 transitions. [2023-11-06 22:42:10,184 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:42:10,185 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 919 transitions. [2023-11-06 22:42:10,187 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 153.16666666666666) internal successors, (919), 6 states have internal predecessors, (919), 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) [2023-11-06 22:42:10,192 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 329.0) internal successors, (2303), 7 states have internal predecessors, (2303), 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) [2023-11-06 22:42:10,193 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 329.0) internal successors, (2303), 7 states have internal predecessors, (2303), 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) [2023-11-06 22:42:10,193 INFO L175 Difference]: Start difference. First operand has 31 places, 27 transitions, 109 flow. Second operand 6 states and 919 transitions. [2023-11-06 22:42:10,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 65 transitions, 385 flow [2023-11-06 22:42:10,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 65 transitions, 373 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:42:10,196 INFO L231 Difference]: Finished difference. Result has 37 places, 33 transitions, 176 flow [2023-11-06 22:42:10,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=329, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=176, PETRI_PLACES=37, PETRI_TRANSITIONS=33} [2023-11-06 22:42:10,197 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 6 predicate places. [2023-11-06 22:42:10,198 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 33 transitions, 176 flow [2023-11-06 22:42:10,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 144.71428571428572) internal successors, (1013), 7 states have internal predecessors, (1013), 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) [2023-11-06 22:42:10,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:42:10,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:42:10,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:42:10,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:42:10,404 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-06 22:42:10,405 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:42:10,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1595607934, now seen corresponding path program 1 times [2023-11-06 22:42:10,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:42:10,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123937773] [2023-11-06 22:42:10,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:10,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:42:10,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:10,490 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:42:10,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:42:10,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123937773] [2023-11-06 22:42:10,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123937773] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:42:10,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:42:10,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:42:10,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568973105] [2023-11-06 22:42:10,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:42:10,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:42:10,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:42:10,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:42:10,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:42:10,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 329 [2023-11-06 22:42:10,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 33 transitions, 176 flow. Second operand has 3 states, 3 states have (on average 144.66666666666666) internal successors, (434), 3 states have internal predecessors, (434), 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) [2023-11-06 22:42:10,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:42:10,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 329 [2023-11-06 22:42:10,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:42:10,585 INFO L124 PetriNetUnfolderBase]: 165/260 cut-off events. [2023-11-06 22:42:10,585 INFO L125 PetriNetUnfolderBase]: For 345/353 co-relation queries the response was YES. [2023-11-06 22:42:10,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1059 conditions, 260 events. 165/260 cut-off events. For 345/353 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 697 event pairs, 31 based on Foata normal form. 10/202 useless extension candidates. Maximal degree in co-relation 1046. Up to 243 conditions per place. [2023-11-06 22:42:10,589 INFO L140 encePairwiseOnDemand]: 322/329 looper letters, 33 selfloop transitions, 3 changer transitions 0/37 dead transitions. [2023-11-06 22:42:10,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 37 transitions, 258 flow [2023-11-06 22:42:10,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:42:10,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:42:10,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 453 transitions. [2023-11-06 22:42:10,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45896656534954405 [2023-11-06 22:42:10,592 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 453 transitions. [2023-11-06 22:42:10,592 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 453 transitions. [2023-11-06 22:42:10,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:42:10,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 453 transitions. [2023-11-06 22:42:10,595 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 151.0) internal successors, (453), 3 states have internal predecessors, (453), 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) [2023-11-06 22:42:10,597 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 329.0) internal successors, (1316), 4 states have internal predecessors, (1316), 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) [2023-11-06 22:42:10,599 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 329.0) internal successors, (1316), 4 states have internal predecessors, (1316), 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) [2023-11-06 22:42:10,599 INFO L175 Difference]: Start difference. First operand has 37 places, 33 transitions, 176 flow. Second operand 3 states and 453 transitions. [2023-11-06 22:42:10,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 37 transitions, 258 flow [2023-11-06 22:42:10,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 37 transitions, 233 flow, removed 11 selfloop flow, removed 1 redundant places. [2023-11-06 22:42:10,602 INFO L231 Difference]: Finished difference. Result has 39 places, 33 transitions, 168 flow [2023-11-06 22:42:10,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=329, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=168, PETRI_PLACES=39, PETRI_TRANSITIONS=33} [2023-11-06 22:42:10,604 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 8 predicate places. [2023-11-06 22:42:10,604 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 33 transitions, 168 flow [2023-11-06 22:42:10,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 144.66666666666666) internal successors, (434), 3 states have internal predecessors, (434), 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) [2023-11-06 22:42:10,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:42:10,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:42:10,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-06 22:42:10,605 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-06 22:42:10,606 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:42:10,606 INFO L85 PathProgramCache]: Analyzing trace with hash -668111411, now seen corresponding path program 1 times [2023-11-06 22:42:10,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:42:10,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780700627] [2023-11-06 22:42:10,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:10,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:42:10,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:11,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:42:11,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:42:11,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780700627] [2023-11-06 22:42:11,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780700627] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:42:11,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298810832] [2023-11-06 22:42:11,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:11,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:42:11,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:42:11,132 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:42:11,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:42:11,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:11,239 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-06 22:42:11,243 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:42:11,332 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 22:42:11,428 INFO L351 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 8 treesize of output 1 [2023-11-06 22:42:11,492 INFO L351 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 8 treesize of output 1 [2023-11-06 22:42:11,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:42:11,578 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:42:11,969 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:42:11,969 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 50 [2023-11-06 22:42:11,987 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-06 22:42:11,987 INFO L351 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 316 treesize of output 287 [2023-11-06 22:42:12,008 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:42:12,009 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 84 [2023-11-06 22:42:12,032 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-06 22:42:12,033 INFO L351 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 95 treesize of output 71 [2023-11-06 22:42:12,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:42:12,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298810832] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:42:12,107 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:42:12,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 17 [2023-11-06 22:42:12,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167141263] [2023-11-06 22:42:12,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:42:12,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-06 22:42:12,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:42:12,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-06 22:42:12,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=274, Unknown=1, NotChecked=0, Total=342 [2023-11-06 22:42:13,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 329 [2023-11-06 22:42:13,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 33 transitions, 168 flow. Second operand has 19 states, 19 states have (on average 101.42105263157895) internal successors, (1927), 19 states have internal predecessors, (1927), 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) [2023-11-06 22:42:13,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:42:13,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 329 [2023-11-06 22:42:13,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:42:16,037 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:42:17,286 INFO L124 PetriNetUnfolderBase]: 900/1385 cut-off events. [2023-11-06 22:42:17,286 INFO L125 PetriNetUnfolderBase]: For 1823/1861 co-relation queries the response was YES. [2023-11-06 22:42:17,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5469 conditions, 1385 events. 900/1385 cut-off events. For 1823/1861 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 6049 event pairs, 27 based on Foata normal form. 44/1101 useless extension candidates. Maximal degree in co-relation 5453. Up to 957 conditions per place. [2023-11-06 22:42:17,302 INFO L140 encePairwiseOnDemand]: 317/329 looper letters, 113 selfloop transitions, 98 changer transitions 2/214 dead transitions. [2023-11-06 22:42:17,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 214 transitions, 1628 flow [2023-11-06 22:42:17,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-06 22:42:17,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-06 22:42:17,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2459 transitions. [2023-11-06 22:42:17,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32496365798863486 [2023-11-06 22:42:17,316 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2459 transitions. [2023-11-06 22:42:17,316 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2459 transitions. [2023-11-06 22:42:17,318 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:42:17,319 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2459 transitions. [2023-11-06 22:42:17,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 106.91304347826087) internal successors, (2459), 23 states have internal predecessors, (2459), 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) [2023-11-06 22:42:17,341 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 329.0) internal successors, (7896), 24 states have internal predecessors, (7896), 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) [2023-11-06 22:42:17,345 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 329.0) internal successors, (7896), 24 states have internal predecessors, (7896), 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) [2023-11-06 22:42:17,345 INFO L175 Difference]: Start difference. First operand has 39 places, 33 transitions, 168 flow. Second operand 23 states and 2459 transitions. [2023-11-06 22:42:17,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 214 transitions, 1628 flow [2023-11-06 22:42:17,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 214 transitions, 1590 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:42:17,366 INFO L231 Difference]: Finished difference. Result has 71 places, 136 transitions, 1254 flow [2023-11-06 22:42:17,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=329, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1254, PETRI_PLACES=71, PETRI_TRANSITIONS=136} [2023-11-06 22:42:17,367 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 40 predicate places. [2023-11-06 22:42:17,367 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 136 transitions, 1254 flow [2023-11-06 22:42:17,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 101.42105263157895) internal successors, (1927), 19 states have internal predecessors, (1927), 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) [2023-11-06 22:42:17,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:42:17,368 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:42:17,381 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:42:17,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-06 22:42:17,574 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-06 22:42:17,575 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:42:17,575 INFO L85 PathProgramCache]: Analyzing trace with hash -75991086, now seen corresponding path program 1 times [2023-11-06 22:42:17,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:42:17,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672741975] [2023-11-06 22:42:17,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:17,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:42:17,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:18,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:42:18,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:42:18,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672741975] [2023-11-06 22:42:18,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672741975] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:42:18,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060047887] [2023-11-06 22:42:18,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:18,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:42:18,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:42:18,119 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:42:18,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:42:18,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:18,215 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-06 22:42:18,219 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:42:18,285 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 22:42:18,353 INFO L351 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 8 treesize of output 1 [2023-11-06 22:42:18,407 INFO L351 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 8 treesize of output 1 [2023-11-06 22:42:18,536 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:42:18,536 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:42:18,988 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:42:18,988 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 48 [2023-11-06 22:42:19,009 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-06 22:42:19,010 INFO L351 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 140 treesize of output 127 [2023-11-06 22:42:19,030 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-06 22:42:19,030 INFO L351 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 124 treesize of output 100 [2023-11-06 22:42:19,044 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-06 22:42:19,045 INFO L351 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 79 treesize of output 67 [2023-11-06 22:42:19,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:42:19,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060047887] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:42:19,141 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:42:19,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 17 [2023-11-06 22:42:19,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081877686] [2023-11-06 22:42:19,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:42:19,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-06 22:42:19,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:42:19,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-06 22:42:19,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=253, Unknown=2, NotChecked=0, Total=342 [2023-11-06 22:42:21,683 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:42:23,974 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:42:24,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 329 [2023-11-06 22:42:24,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 136 transitions, 1254 flow. Second operand has 19 states, 19 states have (on average 101.42105263157895) internal successors, (1927), 19 states have internal predecessors, (1927), 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) [2023-11-06 22:42:24,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:42:24,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 329 [2023-11-06 22:42:24,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:42:25,872 INFO L124 PetriNetUnfolderBase]: 1072/1785 cut-off events. [2023-11-06 22:42:25,872 INFO L125 PetriNetUnfolderBase]: For 12380/12440 co-relation queries the response was YES. [2023-11-06 22:42:25,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10906 conditions, 1785 events. 1072/1785 cut-off events. For 12380/12440 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 9348 event pairs, 98 based on Foata normal form. 80/1654 useless extension candidates. Maximal degree in co-relation 10878. Up to 1230 conditions per place. [2023-11-06 22:42:25,897 INFO L140 encePairwiseOnDemand]: 318/329 looper letters, 144 selfloop transitions, 71 changer transitions 14/230 dead transitions. [2023-11-06 22:42:25,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 230 transitions, 2403 flow [2023-11-06 22:42:25,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-06 22:42:25,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-06 22:42:25,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2027 transitions. [2023-11-06 22:42:25,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3242681171012638 [2023-11-06 22:42:25,907 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2027 transitions. [2023-11-06 22:42:25,907 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2027 transitions. [2023-11-06 22:42:25,909 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:42:25,909 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2027 transitions. [2023-11-06 22:42:25,914 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 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) [2023-11-06 22:42:25,925 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 329.0) internal successors, (6580), 20 states have internal predecessors, (6580), 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) [2023-11-06 22:42:25,928 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 329.0) internal successors, (6580), 20 states have internal predecessors, (6580), 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) [2023-11-06 22:42:25,928 INFO L175 Difference]: Start difference. First operand has 71 places, 136 transitions, 1254 flow. Second operand 19 states and 2027 transitions. [2023-11-06 22:42:25,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 230 transitions, 2403 flow [2023-11-06 22:42:25,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 230 transitions, 2265 flow, removed 65 selfloop flow, removed 3 redundant places. [2023-11-06 22:42:25,992 INFO L231 Difference]: Finished difference. Result has 93 places, 170 transitions, 1762 flow [2023-11-06 22:42:25,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=329, PETRI_DIFFERENCE_MINUEND_FLOW=1134, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1762, PETRI_PLACES=93, PETRI_TRANSITIONS=170} [2023-11-06 22:42:25,993 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 62 predicate places. [2023-11-06 22:42:25,994 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 170 transitions, 1762 flow [2023-11-06 22:42:25,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 101.42105263157895) internal successors, (1927), 19 states have internal predecessors, (1927), 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) [2023-11-06 22:42:25,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:42:25,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:42:26,005 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-06 22:42:26,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-06 22:42:26,201 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-06 22:42:26,201 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:42:26,201 INFO L85 PathProgramCache]: Analyzing trace with hash -671537655, now seen corresponding path program 1 times [2023-11-06 22:42:26,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:42:26,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218850324] [2023-11-06 22:42:26,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:26,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:42:26,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:26,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:42:26,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:42:26,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218850324] [2023-11-06 22:42:26,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218850324] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:42:26,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916684092] [2023-11-06 22:42:26,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:26,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:42:26,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:42:26,872 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:42:26,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:42:26,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:26,978 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-06 22:42:26,982 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:42:27,042 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 22:42:27,098 INFO L351 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 8 treesize of output 1 [2023-11-06 22:42:27,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:42:27,220 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-06 22:42:27,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:42:27,320 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:42:27,682 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:42:27,682 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 47 [2023-11-06 22:42:27,700 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:42:27,700 INFO L351 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 108 treesize of output 100 [2023-11-06 22:42:27,710 INFO L351 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 68 treesize of output 56 [2023-11-06 22:42:27,725 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:42:27,725 INFO L351 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 51 [2023-11-06 22:42:27,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:42:27,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916684092] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:42:27,904 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:42:27,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-11-06 22:42:27,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103464023] [2023-11-06 22:42:27,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:42:27,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-06 22:42:27,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:42:27,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-06 22:42:27,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2023-11-06 22:42:29,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 329 [2023-11-06 22:42:29,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 170 transitions, 1762 flow. Second operand has 20 states, 20 states have (on average 118.35) internal successors, (2367), 20 states have internal predecessors, (2367), 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) [2023-11-06 22:42:29,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:42:29,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 329 [2023-11-06 22:42:29,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:42:30,747 INFO L124 PetriNetUnfolderBase]: 966/1620 cut-off events. [2023-11-06 22:42:30,747 INFO L125 PetriNetUnfolderBase]: For 13262/13322 co-relation queries the response was YES. [2023-11-06 22:42:30,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10402 conditions, 1620 events. 966/1620 cut-off events. For 13262/13322 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 8430 event pairs, 127 based on Foata normal form. 98/1615 useless extension candidates. Maximal degree in co-relation 10366. Up to 1188 conditions per place. [2023-11-06 22:42:30,770 INFO L140 encePairwiseOnDemand]: 318/329 looper letters, 164 selfloop transitions, 59 changer transitions 17/241 dead transitions. [2023-11-06 22:42:30,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 241 transitions, 2860 flow [2023-11-06 22:42:30,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-06 22:42:30,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-06 22:42:30,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2567 transitions. [2023-11-06 22:42:30,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3715443624258214 [2023-11-06 22:42:30,781 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2567 transitions. [2023-11-06 22:42:30,781 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2567 transitions. [2023-11-06 22:42:30,783 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:42:30,783 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2567 transitions. [2023-11-06 22:42:30,791 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 122.23809523809524) internal successors, (2567), 21 states have internal predecessors, (2567), 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) [2023-11-06 22:42:30,803 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 329.0) internal successors, (7238), 22 states have internal predecessors, (7238), 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) [2023-11-06 22:42:30,805 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 329.0) internal successors, (7238), 22 states have internal predecessors, (7238), 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) [2023-11-06 22:42:30,806 INFO L175 Difference]: Start difference. First operand has 93 places, 170 transitions, 1762 flow. Second operand 21 states and 2567 transitions. [2023-11-06 22:42:30,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 241 transitions, 2860 flow [2023-11-06 22:42:30,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 241 transitions, 2740 flow, removed 45 selfloop flow, removed 10 redundant places. [2023-11-06 22:42:30,878 INFO L231 Difference]: Finished difference. Result has 104 places, 171 transitions, 1803 flow [2023-11-06 22:42:30,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=329, PETRI_DIFFERENCE_MINUEND_FLOW=1614, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1803, PETRI_PLACES=104, PETRI_TRANSITIONS=171} [2023-11-06 22:42:30,879 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 73 predicate places. [2023-11-06 22:42:30,879 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 171 transitions, 1803 flow [2023-11-06 22:42:30,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 118.35) internal successors, (2367), 20 states have internal predecessors, (2367), 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) [2023-11-06 22:42:30,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:42:30,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:42:30,892 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 22:42:31,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-06 22:42:31,086 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-06 22:42:31,086 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:42:31,086 INFO L85 PathProgramCache]: Analyzing trace with hash -640137886, now seen corresponding path program 1 times [2023-11-06 22:42:31,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:42:31,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735394796] [2023-11-06 22:42:31,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:31,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:42:31,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:31,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:42:31,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:42:31,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735394796] [2023-11-06 22:42:31,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735394796] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:42:31,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041795882] [2023-11-06 22:42:31,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:31,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:42:31,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:42:31,565 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:42:31,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 22:42:31,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:31,662 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-06 22:42:31,665 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:42:31,727 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 22:42:31,779 INFO L351 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 8 treesize of output 1 [2023-11-06 22:42:31,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:42:31,889 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-06 22:42:31,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:42:31,998 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:42:32,352 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:42:32,353 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 45 [2023-11-06 22:42:32,367 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:42:32,367 INFO L351 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 100 treesize of output 92 [2023-11-06 22:42:32,377 INFO L351 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 60 treesize of output 48 [2023-11-06 22:42:32,393 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:42:32,394 INFO L351 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 51 treesize of output 47 [2023-11-06 22:42:32,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:42:32,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041795882] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:42:32,561 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:42:32,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-11-06 22:42:32,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295374871] [2023-11-06 22:42:32,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:42:32,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-06 22:42:32,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:42:32,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-06 22:42:32,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=307, Unknown=1, NotChecked=0, Total=380 [2023-11-06 22:42:33,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 329 [2023-11-06 22:42:33,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 171 transitions, 1803 flow. Second operand has 20 states, 20 states have (on average 118.35) internal successors, (2367), 20 states have internal predecessors, (2367), 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) [2023-11-06 22:42:33,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:42:33,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 329 [2023-11-06 22:42:33,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:42:35,728 INFO L124 PetriNetUnfolderBase]: 1167/1849 cut-off events. [2023-11-06 22:42:35,728 INFO L125 PetriNetUnfolderBase]: For 17617/17677 co-relation queries the response was YES. [2023-11-06 22:42:35,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12794 conditions, 1849 events. 1167/1849 cut-off events. For 17617/17677 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 8811 event pairs, 125 based on Foata normal form. 180/1887 useless extension candidates. Maximal degree in co-relation 12755. Up to 1242 conditions per place. [2023-11-06 22:42:35,763 INFO L140 encePairwiseOnDemand]: 317/329 looper letters, 189 selfloop transitions, 88 changer transitions 2/280 dead transitions. [2023-11-06 22:42:35,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 280 transitions, 3783 flow [2023-11-06 22:42:35,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-06 22:42:35,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-06 22:42:35,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2106 transitions. [2023-11-06 22:42:35,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3765421062041838 [2023-11-06 22:42:35,775 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2106 transitions. [2023-11-06 22:42:35,775 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2106 transitions. [2023-11-06 22:42:35,776 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:42:35,776 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2106 transitions. [2023-11-06 22:42:35,780 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 123.88235294117646) internal successors, (2106), 17 states have internal predecessors, (2106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:35,790 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 329.0) internal successors, (5922), 18 states have internal predecessors, (5922), 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) [2023-11-06 22:42:35,792 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 329.0) internal successors, (5922), 18 states have internal predecessors, (5922), 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) [2023-11-06 22:42:35,792 INFO L175 Difference]: Start difference. First operand has 104 places, 171 transitions, 1803 flow. Second operand 17 states and 2106 transitions. [2023-11-06 22:42:35,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 280 transitions, 3783 flow [2023-11-06 22:42:35,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 280 transitions, 3630 flow, removed 42 selfloop flow, removed 11 redundant places. [2023-11-06 22:42:35,855 INFO L231 Difference]: Finished difference. Result has 116 places, 204 transitions, 2579 flow [2023-11-06 22:42:35,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=329, PETRI_DIFFERENCE_MINUEND_FLOW=1424, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2579, PETRI_PLACES=116, PETRI_TRANSITIONS=204} [2023-11-06 22:42:35,856 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 85 predicate places. [2023-11-06 22:42:35,856 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 204 transitions, 2579 flow [2023-11-06 22:42:35,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 118.35) internal successors, (2367), 20 states have internal predecessors, (2367), 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) [2023-11-06 22:42:35,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:42:35,857 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:42:35,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:42:36,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-06 22:42:36,063 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-06 22:42:36,063 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:42:36,063 INFO L85 PathProgramCache]: Analyzing trace with hash 713310911, now seen corresponding path program 2 times [2023-11-06 22:42:36,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:42:36,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614840876] [2023-11-06 22:42:36,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:36,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:42:36,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:36,710 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:42:36,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:42:36,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614840876] [2023-11-06 22:42:36,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614840876] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:42:36,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410537570] [2023-11-06 22:42:36,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:42:36,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:42:36,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:42:36,713 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:42:36,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 22:42:36,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 22:42:36,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:42:36,820 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:42:36,821 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:42:36,889 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:42:36,890 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:42:36,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410537570] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:42:36,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:42:36,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 9 [2023-11-06 22:42:36,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818390968] [2023-11-06 22:42:36,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:42:36,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:42:36,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:42:36,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:42:36,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:42:36,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 329 [2023-11-06 22:42:36,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 204 transitions, 2579 flow. Second operand has 5 states, 5 states have (on average 135.8) internal successors, (679), 5 states have internal predecessors, (679), 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) [2023-11-06 22:42:36,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:42:36,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 329 [2023-11-06 22:42:36,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:42:37,486 INFO L124 PetriNetUnfolderBase]: 1156/1844 cut-off events. [2023-11-06 22:42:37,486 INFO L125 PetriNetUnfolderBase]: For 25597/25657 co-relation queries the response was YES. [2023-11-06 22:42:37,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14474 conditions, 1844 events. 1156/1844 cut-off events. For 25597/25657 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 8944 event pairs, 95 based on Foata normal form. 84/1838 useless extension candidates. Maximal degree in co-relation 14427. Up to 1760 conditions per place. [2023-11-06 22:42:37,509 INFO L140 encePairwiseOnDemand]: 321/329 looper letters, 190 selfloop transitions, 18 changer transitions 3/212 dead transitions. [2023-11-06 22:42:37,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 212 transitions, 3036 flow [2023-11-06 22:42:37,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:42:37,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:42:37,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 569 transitions. [2023-11-06 22:42:37,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43237082066869303 [2023-11-06 22:42:37,511 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 569 transitions. [2023-11-06 22:42:37,511 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 569 transitions. [2023-11-06 22:42:37,512 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:42:37,512 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 569 transitions. [2023-11-06 22:42:37,513 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 142.25) internal successors, (569), 4 states have internal predecessors, (569), 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) [2023-11-06 22:42:37,516 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 329.0) internal successors, (1645), 5 states have internal predecessors, (1645), 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) [2023-11-06 22:42:37,516 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 329.0) internal successors, (1645), 5 states have internal predecessors, (1645), 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) [2023-11-06 22:42:37,517 INFO L175 Difference]: Start difference. First operand has 116 places, 204 transitions, 2579 flow. Second operand 4 states and 569 transitions. [2023-11-06 22:42:37,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 212 transitions, 3036 flow [2023-11-06 22:42:37,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 212 transitions, 2657 flow, removed 165 selfloop flow, removed 7 redundant places. [2023-11-06 22:42:37,669 INFO L231 Difference]: Finished difference. Result has 113 places, 200 transitions, 2205 flow [2023-11-06 22:42:37,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=329, PETRI_DIFFERENCE_MINUEND_FLOW=2152, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2205, PETRI_PLACES=113, PETRI_TRANSITIONS=200} [2023-11-06 22:42:37,670 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 82 predicate places. [2023-11-06 22:42:37,670 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 200 transitions, 2205 flow [2023-11-06 22:42:37,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 135.8) internal successors, (679), 5 states have internal predecessors, (679), 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) [2023-11-06 22:42:37,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:42:37,671 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2023-11-06 22:42:37,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 22:42:37,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-06 22:42:37,886 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-06 22:42:37,887 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:42:37,887 INFO L85 PathProgramCache]: Analyzing trace with hash -639205428, now seen corresponding path program 2 times [2023-11-06 22:42:37,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:42:37,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533802718] [2023-11-06 22:42:37,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:37,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:42:37,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:37,988 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:42:37,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:42:37,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533802718] [2023-11-06 22:42:37,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533802718] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:42:37,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474485897] [2023-11-06 22:42:37,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:42:37,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:42:37,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:42:37,990 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:42:38,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 22:42:38,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 22:42:38,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:42:38,095 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:42:38,097 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:42:38,113 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-06 22:42:38,114 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:42:38,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474485897] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:42:38,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:42:38,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [6] total 7 [2023-11-06 22:42:38,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876055312] [2023-11-06 22:42:38,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:42:38,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:42:38,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:42:38,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:42:38,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:42:38,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 329 [2023-11-06 22:42:38,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 200 transitions, 2205 flow. Second operand has 3 states, 3 states have (on average 146.0) internal successors, (438), 3 states have internal predecessors, (438), 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) [2023-11-06 22:42:38,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:42:38,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 329 [2023-11-06 22:42:38,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:42:38,511 INFO L124 PetriNetUnfolderBase]: 985/1563 cut-off events. [2023-11-06 22:42:38,511 INFO L125 PetriNetUnfolderBase]: For 22353/22413 co-relation queries the response was YES. [2023-11-06 22:42:38,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11283 conditions, 1563 events. 985/1563 cut-off events. For 22353/22413 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 7127 event pairs, 271 based on Foata normal form. 166/1663 useless extension candidates. Maximal degree in co-relation 11235. Up to 1559 conditions per place. [2023-11-06 22:42:38,532 INFO L140 encePairwiseOnDemand]: 327/329 looper letters, 175 selfloop transitions, 1 changer transitions 13/190 dead transitions. [2023-11-06 22:42:38,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 190 transitions, 2426 flow [2023-11-06 22:42:38,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:42:38,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:42:38,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 449 transitions. [2023-11-06 22:42:38,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45491388044579534 [2023-11-06 22:42:38,535 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 449 transitions. [2023-11-06 22:42:38,535 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 449 transitions. [2023-11-06 22:42:38,535 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:42:38,536 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 449 transitions. [2023-11-06 22:42:38,537 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 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) [2023-11-06 22:42:38,539 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 329.0) internal successors, (1316), 4 states have internal predecessors, (1316), 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) [2023-11-06 22:42:38,539 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 329.0) internal successors, (1316), 4 states have internal predecessors, (1316), 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) [2023-11-06 22:42:38,539 INFO L175 Difference]: Start difference. First operand has 113 places, 200 transitions, 2205 flow. Second operand 3 states and 449 transitions. [2023-11-06 22:42:38,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 190 transitions, 2426 flow [2023-11-06 22:42:38,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 190 transitions, 2260 flow, removed 19 selfloop flow, removed 6 redundant places. [2023-11-06 22:42:38,630 INFO L231 Difference]: Finished difference. Result has 108 places, 177 transitions, 1720 flow [2023-11-06 22:42:38,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=329, PETRI_DIFFERENCE_MINUEND_FLOW=1882, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1720, PETRI_PLACES=108, PETRI_TRANSITIONS=177} [2023-11-06 22:42:38,631 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 77 predicate places. [2023-11-06 22:42:38,631 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 177 transitions, 1720 flow [2023-11-06 22:42:38,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 146.0) internal successors, (438), 3 states have internal predecessors, (438), 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) [2023-11-06 22:42:38,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:42:38,631 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:42:38,640 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 22:42:38,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-06 22:42:38,832 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-06 22:42:38,832 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:42:38,832 INFO L85 PathProgramCache]: Analyzing trace with hash 713312020, now seen corresponding path program 2 times [2023-11-06 22:42:38,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:42:38,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159596948] [2023-11-06 22:42:38,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:38,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:42:38,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:39,508 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:42:39,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:42:39,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159596948] [2023-11-06 22:42:39,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159596948] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:42:39,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732482333] [2023-11-06 22:42:39,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:42:39,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:42:39,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:42:39,510 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:42:39,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 22:42:39,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 22:42:39,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:42:39,622 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:42:39,623 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:42:39,700 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:42:39,701 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:42:39,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732482333] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:42:39,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:42:39,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 9 [2023-11-06 22:42:39,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805482434] [2023-11-06 22:42:39,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:42:39,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:42:39,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:42:39,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:42:39,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:42:39,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 329 [2023-11-06 22:42:39,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 177 transitions, 1720 flow. Second operand has 5 states, 5 states have (on average 135.8) internal successors, (679), 5 states have internal predecessors, (679), 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) [2023-11-06 22:42:39,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:42:39,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 329 [2023-11-06 22:42:39,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:42:40,164 INFO L124 PetriNetUnfolderBase]: 879/1422 cut-off events. [2023-11-06 22:42:40,164 INFO L125 PetriNetUnfolderBase]: For 17766/17806 co-relation queries the response was YES. [2023-11-06 22:42:40,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9568 conditions, 1422 events. 879/1422 cut-off events. For 17766/17806 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 6556 event pairs, 62 based on Foata normal form. 52/1474 useless extension candidates. Maximal degree in co-relation 9524. Up to 1116 conditions per place. [2023-11-06 22:42:40,182 INFO L140 encePairwiseOnDemand]: 322/329 looper letters, 178 selfloop transitions, 35 changer transitions 0/214 dead transitions. [2023-11-06 22:42:40,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 214 transitions, 2562 flow [2023-11-06 22:42:40,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:42:40,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:42:40,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 568 transitions. [2023-11-06 22:42:40,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4316109422492401 [2023-11-06 22:42:40,185 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 568 transitions. [2023-11-06 22:42:40,185 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 568 transitions. [2023-11-06 22:42:40,189 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:42:40,189 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 568 transitions. [2023-11-06 22:42:40,192 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 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) [2023-11-06 22:42:40,194 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 329.0) internal successors, (1645), 5 states have internal predecessors, (1645), 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) [2023-11-06 22:42:40,195 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 329.0) internal successors, (1645), 5 states have internal predecessors, (1645), 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) [2023-11-06 22:42:40,195 INFO L175 Difference]: Start difference. First operand has 108 places, 177 transitions, 1720 flow. Second operand 4 states and 568 transitions. [2023-11-06 22:42:40,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 214 transitions, 2562 flow [2023-11-06 22:42:40,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 214 transitions, 2561 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:42:40,260 INFO L231 Difference]: Finished difference. Result has 110 places, 182 transitions, 1921 flow [2023-11-06 22:42:40,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=329, PETRI_DIFFERENCE_MINUEND_FLOW=1698, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1921, PETRI_PLACES=110, PETRI_TRANSITIONS=182} [2023-11-06 22:42:40,260 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 79 predicate places. [2023-11-06 22:42:40,261 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 182 transitions, 1921 flow [2023-11-06 22:42:40,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 135.8) internal successors, (679), 5 states have internal predecessors, (679), 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) [2023-11-06 22:42:40,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:42:40,261 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:42:40,272 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 22:42:40,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-06 22:42:40,472 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-06 22:42:40,472 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:42:40,472 INFO L85 PathProgramCache]: Analyzing trace with hash 711442596, now seen corresponding path program 2 times [2023-11-06 22:42:40,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:42:40,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620916751] [2023-11-06 22:42:40,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:40,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:42:40,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:41,078 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:42:41,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:42:41,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620916751] [2023-11-06 22:42:41,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620916751] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:42:41,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580710099] [2023-11-06 22:42:41,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:42:41,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:42:41,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:42:41,084 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:42:41,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 22:42:41,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 22:42:41,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:42:41,193 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:42:41,195 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:42:41,262 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:42:41,262 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:42:41,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580710099] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:42:41,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:42:41,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 9 [2023-11-06 22:42:41,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730872086] [2023-11-06 22:42:41,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:42:41,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:42:41,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:42:41,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:42:41,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:42:41,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 329 [2023-11-06 22:42:41,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 182 transitions, 1921 flow. Second operand has 5 states, 5 states have (on average 135.8) internal successors, (679), 5 states have internal predecessors, (679), 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) [2023-11-06 22:42:41,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:42:41,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 329 [2023-11-06 22:42:41,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:42:41,694 INFO L124 PetriNetUnfolderBase]: 875/1418 cut-off events. [2023-11-06 22:42:41,695 INFO L125 PetriNetUnfolderBase]: For 18047/18087 co-relation queries the response was YES. [2023-11-06 22:42:41,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9839 conditions, 1418 events. 875/1418 cut-off events. For 18047/18087 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 6564 event pairs, 89 based on Foata normal form. 48/1466 useless extension candidates. Maximal degree in co-relation 9793. Up to 1338 conditions per place. [2023-11-06 22:42:41,714 INFO L140 encePairwiseOnDemand]: 323/329 looper letters, 168 selfloop transitions, 16 changer transitions 8/193 dead transitions. [2023-11-06 22:42:41,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 193 transitions, 2349 flow [2023-11-06 22:42:41,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:42:41,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:42:41,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 702 transitions. [2023-11-06 22:42:41,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4267477203647416 [2023-11-06 22:42:41,716 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 702 transitions. [2023-11-06 22:42:41,717 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 702 transitions. [2023-11-06 22:42:41,717 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:42:41,717 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 702 transitions. [2023-11-06 22:42:41,719 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 140.4) internal successors, (702), 5 states have internal predecessors, (702), 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) [2023-11-06 22:42:41,721 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 329.0) internal successors, (1974), 6 states have internal predecessors, (1974), 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) [2023-11-06 22:42:41,722 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 329.0) internal successors, (1974), 6 states have internal predecessors, (1974), 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) [2023-11-06 22:42:41,722 INFO L175 Difference]: Start difference. First operand has 110 places, 182 transitions, 1921 flow. Second operand 5 states and 702 transitions. [2023-11-06 22:42:41,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 193 transitions, 2349 flow [2023-11-06 22:42:41,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 193 transitions, 2290 flow, removed 9 selfloop flow, removed 2 redundant places. [2023-11-06 22:42:41,805 INFO L231 Difference]: Finished difference. Result has 113 places, 179 transitions, 1873 flow [2023-11-06 22:42:41,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=329, PETRI_DIFFERENCE_MINUEND_FLOW=1862, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1873, PETRI_PLACES=113, PETRI_TRANSITIONS=179} [2023-11-06 22:42:41,806 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 82 predicate places. [2023-11-06 22:42:41,806 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 179 transitions, 1873 flow [2023-11-06 22:42:41,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 135.8) internal successors, (679), 5 states have internal predecessors, (679), 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) [2023-11-06 22:42:41,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:42:41,807 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:42:41,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 22:42:42,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-06 22:42:42,016 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-06 22:42:42,016 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:42:42,016 INFO L85 PathProgramCache]: Analyzing trace with hash 580897566, now seen corresponding path program 1 times [2023-11-06 22:42:42,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:42:42,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366505240] [2023-11-06 22:42:42,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:42,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:42:42,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:42,086 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:42:42,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:42:42,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366505240] [2023-11-06 22:42:42,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366505240] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:42:42,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:42:42,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:42:42,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767881772] [2023-11-06 22:42:42,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:42:42,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:42:42,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:42:42,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:42:42,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:42:42,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 329 [2023-11-06 22:42:42,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 179 transitions, 1873 flow. Second operand has 4 states, 4 states have (on average 144.5) internal successors, (578), 4 states have internal predecessors, (578), 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) [2023-11-06 22:42:42,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:42:42,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 329 [2023-11-06 22:42:42,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:42:42,536 INFO L124 PetriNetUnfolderBase]: 894/1449 cut-off events. [2023-11-06 22:42:42,536 INFO L125 PetriNetUnfolderBase]: For 21392/21432 co-relation queries the response was YES. [2023-11-06 22:42:42,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10189 conditions, 1449 events. 894/1449 cut-off events. For 21392/21432 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 6745 event pairs, 78 based on Foata normal form. 110/1559 useless extension candidates. Maximal degree in co-relation 10142. Up to 1083 conditions per place. [2023-11-06 22:42:42,554 INFO L140 encePairwiseOnDemand]: 323/329 looper letters, 147 selfloop transitions, 66 changer transitions 2/216 dead transitions. [2023-11-06 22:42:42,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 216 transitions, 2786 flow [2023-11-06 22:42:42,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:42:42,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:42:42,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 605 transitions. [2023-11-06 22:42:42,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45972644376899696 [2023-11-06 22:42:42,556 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 605 transitions. [2023-11-06 22:42:42,557 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 605 transitions. [2023-11-06 22:42:42,557 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:42:42,557 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 605 transitions. [2023-11-06 22:42:42,558 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 151.25) internal successors, (605), 4 states have internal predecessors, (605), 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) [2023-11-06 22:42:42,560 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 329.0) internal successors, (1645), 5 states have internal predecessors, (1645), 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) [2023-11-06 22:42:42,561 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 329.0) internal successors, (1645), 5 states have internal predecessors, (1645), 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) [2023-11-06 22:42:42,561 INFO L175 Difference]: Start difference. First operand has 113 places, 179 transitions, 1873 flow. Second operand 4 states and 605 transitions. [2023-11-06 22:42:42,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 216 transitions, 2786 flow [2023-11-06 22:42:42,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 216 transitions, 2725 flow, removed 12 selfloop flow, removed 5 redundant places. [2023-11-06 22:42:42,647 INFO L231 Difference]: Finished difference. Result has 111 places, 200 transitions, 2502 flow [2023-11-06 22:42:42,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=329, PETRI_DIFFERENCE_MINUEND_FLOW=1673, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2502, PETRI_PLACES=111, PETRI_TRANSITIONS=200} [2023-11-06 22:42:42,648 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 80 predicate places. [2023-11-06 22:42:42,648 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 200 transitions, 2502 flow [2023-11-06 22:42:42,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 144.5) internal successors, (578), 4 states have internal predecessors, (578), 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) [2023-11-06 22:42:42,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:42:42,649 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:42:42,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-06 22:42:42,649 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-06 22:42:42,650 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:42:42,650 INFO L85 PathProgramCache]: Analyzing trace with hash 711475215, now seen corresponding path program 2 times [2023-11-06 22:42:42,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:42:42,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10724816] [2023-11-06 22:42:42,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:42,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:42:42,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:43,255 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:42:43,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:42:43,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10724816] [2023-11-06 22:42:43,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10724816] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:42:43,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341180522] [2023-11-06 22:42:43,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:42:43,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:42:43,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:42:43,257 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:42:43,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 22:42:43,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 22:42:43,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:42:43,373 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:42:43,374 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:42:43,445 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:42:43,445 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:42:43,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341180522] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:42:43,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:42:43,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 9 [2023-11-06 22:42:43,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519199422] [2023-11-06 22:42:43,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:42:43,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:42:43,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:42:43,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:42:43,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:42:43,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 329 [2023-11-06 22:42:43,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 200 transitions, 2502 flow. Second operand has 5 states, 5 states have (on average 135.8) internal successors, (679), 5 states have internal predecessors, (679), 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) [2023-11-06 22:42:43,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:42:43,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 329 [2023-11-06 22:42:43,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:42:43,918 INFO L124 PetriNetUnfolderBase]: 900/1455 cut-off events. [2023-11-06 22:42:43,918 INFO L125 PetriNetUnfolderBase]: For 25404/25444 co-relation queries the response was YES. [2023-11-06 22:42:43,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11259 conditions, 1455 events. 900/1455 cut-off events. For 25404/25444 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 6723 event pairs, 71 based on Foata normal form. 60/1509 useless extension candidates. Maximal degree in co-relation 11211. Up to 1108 conditions per place. [2023-11-06 22:42:43,936 INFO L140 encePairwiseOnDemand]: 322/329 looper letters, 190 selfloop transitions, 46 changer transitions 0/237 dead transitions. [2023-11-06 22:42:43,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 237 transitions, 3456 flow [2023-11-06 22:42:43,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:42:43,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:42:43,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 708 transitions. [2023-11-06 22:42:43,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43039513677811553 [2023-11-06 22:42:43,938 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 708 transitions. [2023-11-06 22:42:43,938 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 708 transitions. [2023-11-06 22:42:43,939 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:42:43,939 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 708 transitions. [2023-11-06 22:42:43,941 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 141.6) internal successors, (708), 5 states have internal predecessors, (708), 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) [2023-11-06 22:42:43,943 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 329.0) internal successors, (1974), 6 states have internal predecessors, (1974), 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) [2023-11-06 22:42:43,943 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 329.0) internal successors, (1974), 6 states have internal predecessors, (1974), 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) [2023-11-06 22:42:43,944 INFO L175 Difference]: Start difference. First operand has 111 places, 200 transitions, 2502 flow. Second operand 5 states and 708 transitions. [2023-11-06 22:42:43,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 237 transitions, 3456 flow [2023-11-06 22:42:44,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 237 transitions, 3226 flow, removed 115 selfloop flow, removed 0 redundant places. [2023-11-06 22:42:44,094 INFO L231 Difference]: Finished difference. Result has 116 places, 203 transitions, 2438 flow [2023-11-06 22:42:44,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=329, PETRI_DIFFERENCE_MINUEND_FLOW=2248, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2438, PETRI_PLACES=116, PETRI_TRANSITIONS=203} [2023-11-06 22:42:44,095 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 85 predicate places. [2023-11-06 22:42:44,095 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 203 transitions, 2438 flow [2023-11-06 22:42:44,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 135.8) internal successors, (679), 5 states have internal predecessors, (679), 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) [2023-11-06 22:42:44,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:42:44,096 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:42:44,102 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-06 22:42:44,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:42:44,301 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-06 22:42:44,302 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:42:44,302 INFO L85 PathProgramCache]: Analyzing trace with hash 149164111, now seen corresponding path program 3 times [2023-11-06 22:42:44,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:42:44,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445063970] [2023-11-06 22:42:44,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:44,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:42:44,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:45,001 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:42:45,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:42:45,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445063970] [2023-11-06 22:42:45,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445063970] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:42:45,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236576849] [2023-11-06 22:42:45,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:42:45,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:42:45,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:42:45,008 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:42:45,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 22:42:45,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-06 22:42:45,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:42:45,117 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 22:42:45,118 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:42:45,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:42:45,199 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-06 22:42:45,238 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:42:45,238 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:42:45,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236576849] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:42:45,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:42:45,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 12 [2023-11-06 22:42:45,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856243352] [2023-11-06 22:42:45,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:42:45,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:42:45,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:42:45,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:42:45,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:42:45,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 329 [2023-11-06 22:42:45,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 203 transitions, 2438 flow. Second operand has 7 states, 7 states have (on average 128.28571428571428) internal successors, (898), 7 states have internal predecessors, (898), 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) [2023-11-06 22:42:45,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:42:45,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 329 [2023-11-06 22:42:45,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:42:45,772 INFO L124 PetriNetUnfolderBase]: 914/1479 cut-off events. [2023-11-06 22:42:45,772 INFO L125 PetriNetUnfolderBase]: For 22499/22539 co-relation queries the response was YES. [2023-11-06 22:42:45,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11020 conditions, 1479 events. 914/1479 cut-off events. For 22499/22539 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 6868 event pairs, 56 based on Foata normal form. 64/1537 useless extension candidates. Maximal degree in co-relation 10969. Up to 870 conditions per place. [2023-11-06 22:42:45,788 INFO L140 encePairwiseOnDemand]: 321/329 looper letters, 168 selfloop transitions, 65 changer transitions 0/234 dead transitions. [2023-11-06 22:42:45,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 234 transitions, 3356 flow [2023-11-06 22:42:45,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:42:45,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:42:45,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 801 transitions. [2023-11-06 22:42:45,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40577507598784196 [2023-11-06 22:42:45,790 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 801 transitions. [2023-11-06 22:42:45,790 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 801 transitions. [2023-11-06 22:42:45,791 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:42:45,791 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 801 transitions. [2023-11-06 22:42:45,793 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 133.5) internal successors, (801), 6 states have internal predecessors, (801), 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) [2023-11-06 22:42:45,795 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 329.0) internal successors, (2303), 7 states have internal predecessors, (2303), 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) [2023-11-06 22:42:45,796 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 329.0) internal successors, (2303), 7 states have internal predecessors, (2303), 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) [2023-11-06 22:42:45,796 INFO L175 Difference]: Start difference. First operand has 116 places, 203 transitions, 2438 flow. Second operand 6 states and 801 transitions. [2023-11-06 22:42:45,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 234 transitions, 3356 flow [2023-11-06 22:42:45,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 234 transitions, 3244 flow, removed 15 selfloop flow, removed 3 redundant places. [2023-11-06 22:42:45,914 INFO L231 Difference]: Finished difference. Result has 120 places, 206 transitions, 2602 flow [2023-11-06 22:42:45,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=329, PETRI_DIFFERENCE_MINUEND_FLOW=2298, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2602, PETRI_PLACES=120, PETRI_TRANSITIONS=206} [2023-11-06 22:42:45,915 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 89 predicate places. [2023-11-06 22:42:45,915 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 206 transitions, 2602 flow [2023-11-06 22:42:45,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 128.28571428571428) internal successors, (898), 7 states have internal predecessors, (898), 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) [2023-11-06 22:42:45,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:42:45,915 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:42:45,928 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-06 22:42:46,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-06 22:42:46,121 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-06 22:42:46,121 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:42:46,121 INFO L85 PathProgramCache]: Analyzing trace with hash 117764452, now seen corresponding path program 3 times [2023-11-06 22:42:46,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:42:46,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650670851] [2023-11-06 22:42:46,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:46,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:42:46,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:46,841 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:42:46,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:42:46,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650670851] [2023-11-06 22:42:46,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650670851] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:42:46,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770914940] [2023-11-06 22:42:46,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:42:46,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:42:46,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:42:46,843 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:42:46,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-06 22:42:46,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-06 22:42:46,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:42:46,954 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 22:42:46,956 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:42:47,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:42:47,049 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-06 22:42:47,099 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:42:47,099 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:42:47,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770914940] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:42:47,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:42:47,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 12 [2023-11-06 22:42:47,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284728366] [2023-11-06 22:42:47,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:42:47,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:42:47,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:42:47,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:42:47,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:42:47,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 329 [2023-11-06 22:42:47,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 206 transitions, 2602 flow. Second operand has 7 states, 7 states have (on average 128.28571428571428) internal successors, (898), 7 states have internal predecessors, (898), 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) [2023-11-06 22:42:47,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:42:47,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 329 [2023-11-06 22:42:47,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:42:47,884 INFO L124 PetriNetUnfolderBase]: 913/1482 cut-off events. [2023-11-06 22:42:47,884 INFO L125 PetriNetUnfolderBase]: For 23149/23189 co-relation queries the response was YES. [2023-11-06 22:42:47,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11392 conditions, 1482 events. 913/1482 cut-off events. For 23149/23189 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 6914 event pairs, 118 based on Foata normal form. 52/1528 useless extension candidates. Maximal degree in co-relation 11339. Up to 1402 conditions per place. [2023-11-06 22:42:47,902 INFO L140 encePairwiseOnDemand]: 321/329 looper letters, 193 selfloop transitions, 18 changer transitions 4/216 dead transitions. [2023-11-06 22:42:47,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 216 transitions, 3090 flow [2023-11-06 22:42:47,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:42:47,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:42:47,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 796 transitions. [2023-11-06 22:42:47,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.403242147922999 [2023-11-06 22:42:47,905 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 796 transitions. [2023-11-06 22:42:47,905 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 796 transitions. [2023-11-06 22:42:47,906 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:42:47,906 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 796 transitions. [2023-11-06 22:42:47,908 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 132.66666666666666) internal successors, (796), 6 states have internal predecessors, (796), 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) [2023-11-06 22:42:47,912 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 329.0) internal successors, (2303), 7 states have internal predecessors, (2303), 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) [2023-11-06 22:42:47,913 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 329.0) internal successors, (2303), 7 states have internal predecessors, (2303), 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) [2023-11-06 22:42:47,913 INFO L175 Difference]: Start difference. First operand has 120 places, 206 transitions, 2602 flow. Second operand 6 states and 796 transitions. [2023-11-06 22:42:47,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 216 transitions, 3090 flow [2023-11-06 22:42:48,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 216 transitions, 2984 flow, removed 23 selfloop flow, removed 3 redundant places. [2023-11-06 22:42:48,062 INFO L231 Difference]: Finished difference. Result has 124 places, 203 transitions, 2523 flow [2023-11-06 22:42:48,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=329, PETRI_DIFFERENCE_MINUEND_FLOW=2492, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2523, PETRI_PLACES=124, PETRI_TRANSITIONS=203} [2023-11-06 22:42:48,063 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 93 predicate places. [2023-11-06 22:42:48,064 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 203 transitions, 2523 flow [2023-11-06 22:42:48,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 128.28571428571428) internal successors, (898), 7 states have internal predecessors, (898), 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) [2023-11-06 22:42:48,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:42:48,065 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:42:48,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-06 22:42:48,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-06 22:42:48,270 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-06 22:42:48,271 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:42:48,271 INFO L85 PathProgramCache]: Analyzing trace with hash 2016898678, now seen corresponding path program 4 times [2023-11-06 22:42:48,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:42:48,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276743498] [2023-11-06 22:42:48,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:48,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:42:48,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:49,423 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:42:49,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:42:49,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276743498] [2023-11-06 22:42:49,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276743498] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:42:49,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814408598] [2023-11-06 22:42:49,423 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:42:49,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:42:49,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:42:49,428 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:42:49,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-06 22:42:49,549 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:42:49,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:42:49,551 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-06 22:42:49,552 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:42:49,730 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:42:49,730 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:42:49,779 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:42:49,780 INFO L351 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 [2023-11-06 22:42:49,845 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-06 22:42:49,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814408598] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:42:49,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:42:49,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9, 6] total 17 [2023-11-06 22:42:49,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019066841] [2023-11-06 22:42:49,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:42:49,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:42:49,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:42:49,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:42:49,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2023-11-06 22:42:49,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 329 [2023-11-06 22:42:49,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 203 transitions, 2523 flow. Second operand has 5 states, 5 states have (on average 135.8) internal successors, (679), 5 states have internal predecessors, (679), 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) [2023-11-06 22:42:49,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:42:49,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 329 [2023-11-06 22:42:49,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:42:50,306 INFO L124 PetriNetUnfolderBase]: 905/1464 cut-off events. [2023-11-06 22:42:50,306 INFO L125 PetriNetUnfolderBase]: For 22155/22195 co-relation queries the response was YES. [2023-11-06 22:42:50,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11060 conditions, 1464 events. 905/1464 cut-off events. For 22155/22195 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 6798 event pairs, 123 based on Foata normal form. 44/1502 useless extension candidates. Maximal degree in co-relation 11005. Up to 1410 conditions per place. [2023-11-06 22:42:50,322 INFO L140 encePairwiseOnDemand]: 324/329 looper letters, 191 selfloop transitions, 12 changer transitions 4/208 dead transitions. [2023-11-06 22:42:50,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 208 transitions, 2942 flow [2023-11-06 22:42:50,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:42:50,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:42:50,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 563 transitions. [2023-11-06 22:42:50,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4278115501519757 [2023-11-06 22:42:50,324 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 563 transitions. [2023-11-06 22:42:50,324 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 563 transitions. [2023-11-06 22:42:50,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:42:50,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 563 transitions. [2023-11-06 22:42:50,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 140.75) internal successors, (563), 4 states have internal predecessors, (563), 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) [2023-11-06 22:42:50,328 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 329.0) internal successors, (1645), 5 states have internal predecessors, (1645), 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) [2023-11-06 22:42:50,328 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 329.0) internal successors, (1645), 5 states have internal predecessors, (1645), 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) [2023-11-06 22:42:50,329 INFO L175 Difference]: Start difference. First operand has 124 places, 203 transitions, 2523 flow. Second operand 4 states and 563 transitions. [2023-11-06 22:42:50,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 208 transitions, 2942 flow [2023-11-06 22:42:50,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 208 transitions, 2870 flow, removed 21 selfloop flow, removed 5 redundant places. [2023-11-06 22:42:50,443 INFO L231 Difference]: Finished difference. Result has 120 places, 202 transitions, 2463 flow [2023-11-06 22:42:50,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=329, PETRI_DIFFERENCE_MINUEND_FLOW=2439, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2463, PETRI_PLACES=120, PETRI_TRANSITIONS=202} [2023-11-06 22:42:50,445 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 89 predicate places. [2023-11-06 22:42:50,445 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 202 transitions, 2463 flow [2023-11-06 22:42:50,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 135.8) internal successors, (679), 5 states have internal predecessors, (679), 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) [2023-11-06 22:42:50,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:42:50,445 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:42:50,456 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-06 22:42:50,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-06 22:42:50,651 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-06 22:42:50,651 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:42:50,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1982136248, now seen corresponding path program 2 times [2023-11-06 22:42:50,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:42:50,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361677888] [2023-11-06 22:42:50,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:50,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:42:50,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:50,768 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:42:50,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:42:50,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361677888] [2023-11-06 22:42:50,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361677888] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:42:50,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675264490] [2023-11-06 22:42:50,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:42:50,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:42:50,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:42:50,776 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:42:50,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-06 22:42:50,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:42:50,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:42:50,903 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:42:50,905 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:42:51,029 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:42:51,030 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:42:51,229 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:42:51,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675264490] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:42:51,229 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:42:51,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 15 [2023-11-06 22:42:51,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124875489] [2023-11-06 22:42:51,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:42:51,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 22:42:51,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:42:51,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 22:42:51,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2023-11-06 22:42:51,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 329 [2023-11-06 22:42:51,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 202 transitions, 2463 flow. Second operand has 16 states, 16 states have (on average 133.9375) internal successors, (2143), 16 states have internal predecessors, (2143), 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) [2023-11-06 22:42:51,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:42:51,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 329 [2023-11-06 22:42:51,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:42:51,815 INFO L124 PetriNetUnfolderBase]: 498/816 cut-off events. [2023-11-06 22:42:51,816 INFO L125 PetriNetUnfolderBase]: For 13820/13860 co-relation queries the response was YES. [2023-11-06 22:42:51,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6332 conditions, 816 events. 498/816 cut-off events. For 13820/13860 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3328 event pairs, 171 based on Foata normal form. 55/871 useless extension candidates. Maximal degree in co-relation 6286. Up to 778 conditions per place. [2023-11-06 22:42:51,822 INFO L140 encePairwiseOnDemand]: 324/329 looper letters, 100 selfloop transitions, 3 changer transitions 17/121 dead transitions. [2023-11-06 22:42:51,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 121 transitions, 1699 flow [2023-11-06 22:42:51,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:42:51,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 22:42:51,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 956 transitions. [2023-11-06 22:42:51,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4151107251411203 [2023-11-06 22:42:51,825 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 956 transitions. [2023-11-06 22:42:51,825 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 956 transitions. [2023-11-06 22:42:51,826 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:42:51,826 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 956 transitions. [2023-11-06 22:42:51,827 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 136.57142857142858) internal successors, (956), 7 states have internal predecessors, (956), 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) [2023-11-06 22:42:51,830 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 329.0) internal successors, (2632), 8 states have internal predecessors, (2632), 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) [2023-11-06 22:42:51,831 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 329.0) internal successors, (2632), 8 states have internal predecessors, (2632), 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) [2023-11-06 22:42:51,831 INFO L175 Difference]: Start difference. First operand has 120 places, 202 transitions, 2463 flow. Second operand 7 states and 956 transitions. [2023-11-06 22:42:51,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 121 transitions, 1699 flow [2023-11-06 22:42:51,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 121 transitions, 1486 flow, removed 68 selfloop flow, removed 18 redundant places. [2023-11-06 22:42:51,917 INFO L231 Difference]: Finished difference. Result has 98 places, 104 transitions, 1128 flow [2023-11-06 22:42:51,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=329, PETRI_DIFFERENCE_MINUEND_FLOW=1229, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1128, PETRI_PLACES=98, PETRI_TRANSITIONS=104} [2023-11-06 22:42:51,918 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 67 predicate places. [2023-11-06 22:42:51,918 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 104 transitions, 1128 flow [2023-11-06 22:42:51,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 133.9375) internal successors, (2143), 16 states have internal predecessors, (2143), 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) [2023-11-06 22:42:51,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:42:51,919 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:42:51,932 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-06 22:42:52,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-06 22:42:52,128 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-06 22:42:52,128 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:42:52,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1421352109, now seen corresponding path program 3 times [2023-11-06 22:42:52,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:42:52,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062866031] [2023-11-06 22:42:52,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:52,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:42:52,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:53,274 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:42:53,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:42:53,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062866031] [2023-11-06 22:42:53,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062866031] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:42:53,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114434910] [2023-11-06 22:42:53,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:42:53,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:42:53,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:42:53,280 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:42:53,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-06 22:42:53,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-06 22:42:53,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:42:53,398 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 22:42:53,400 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:42:53,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:42:53,508 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-06 22:42:53,555 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-06 22:42:53,555 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:42:53,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114434910] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:42:53,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:42:53,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 14 [2023-11-06 22:42:53,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563181375] [2023-11-06 22:42:53,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:42:53,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:42:53,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:42:53,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:42:53,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2023-11-06 22:42:53,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 329 [2023-11-06 22:42:53,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 104 transitions, 1128 flow. Second operand has 7 states, 7 states have (on average 128.28571428571428) internal successors, (898), 7 states have internal predecessors, (898), 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) [2023-11-06 22:42:53,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:42:53,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 329 [2023-11-06 22:42:53,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:42:53,963 INFO L124 PetriNetUnfolderBase]: 483/778 cut-off events. [2023-11-06 22:42:53,963 INFO L125 PetriNetUnfolderBase]: For 6590/6620 co-relation queries the response was YES. [2023-11-06 22:42:53,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5039 conditions, 778 events. 483/778 cut-off events. For 6590/6620 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3103 event pairs, 85 based on Foata normal form. 34/812 useless extension candidates. Maximal degree in co-relation 5005. Up to 721 conditions per place. [2023-11-06 22:42:53,971 INFO L140 encePairwiseOnDemand]: 323/329 looper letters, 90 selfloop transitions, 11 changer transitions 10/112 dead transitions. [2023-11-06 22:42:53,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 112 transitions, 1366 flow [2023-11-06 22:42:53,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:42:53,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:42:53,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 793 transitions. [2023-11-06 22:42:53,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017223910840932 [2023-11-06 22:42:53,973 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 793 transitions. [2023-11-06 22:42:53,973 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 793 transitions. [2023-11-06 22:42:53,974 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:42:53,974 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 793 transitions. [2023-11-06 22:42:53,975 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 132.16666666666666) internal successors, (793), 6 states have internal predecessors, (793), 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) [2023-11-06 22:42:53,977 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 329.0) internal successors, (2303), 7 states have internal predecessors, (2303), 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) [2023-11-06 22:42:53,978 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 329.0) internal successors, (2303), 7 states have internal predecessors, (2303), 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) [2023-11-06 22:42:53,978 INFO L175 Difference]: Start difference. First operand has 98 places, 104 transitions, 1128 flow. Second operand 6 states and 793 transitions. [2023-11-06 22:42:53,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 112 transitions, 1366 flow [2023-11-06 22:42:54,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 112 transitions, 1293 flow, removed 32 selfloop flow, removed 6 redundant places. [2023-11-06 22:42:54,012 INFO L231 Difference]: Finished difference. Result has 84 places, 100 transitions, 1041 flow [2023-11-06 22:42:54,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=329, PETRI_DIFFERENCE_MINUEND_FLOW=1047, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1041, PETRI_PLACES=84, PETRI_TRANSITIONS=100} [2023-11-06 22:42:54,013 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 53 predicate places. [2023-11-06 22:42:54,013 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 100 transitions, 1041 flow [2023-11-06 22:42:54,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 128.28571428571428) internal successors, (898), 7 states have internal predecessors, (898), 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) [2023-11-06 22:42:54,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:42:54,014 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:42:54,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-06 22:42:54,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:42:54,220 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-06 22:42:54,220 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:42:54,220 INFO L85 PathProgramCache]: Analyzing trace with hash -22299282, now seen corresponding path program 3 times [2023-11-06 22:42:54,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:42:54,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466786057] [2023-11-06 22:42:54,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:54,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:42:54,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:54,899 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:42:54,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:42:54,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466786057] [2023-11-06 22:42:54,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466786057] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:42:54,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852225851] [2023-11-06 22:42:54,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:42:54,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:42:54,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:42:54,900 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:42:54,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-06 22:42:55,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 22:42:55,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:42:55,029 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-06 22:42:55,033 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:42:55,122 INFO L351 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 [2023-11-06 22:42:55,174 INFO L351 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 8 treesize of output 1 [2023-11-06 22:42:55,202 INFO L351 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 8 treesize of output 1 [2023-11-06 22:42:55,370 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:42:55,370 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:42:55,958 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:42:55,958 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 50 [2023-11-06 22:42:55,977 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-06 22:42:55,978 INFO L351 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 148 treesize of output 135 [2023-11-06 22:42:55,990 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:42:55,994 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 85 [2023-11-06 22:42:56,007 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-06 22:42:56,007 INFO L351 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 112 treesize of output 88 [2023-11-06 22:42:56,122 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:42:56,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852225851] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:42:56,123 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:42:56,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 22 [2023-11-06 22:42:56,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965590010] [2023-11-06 22:42:56,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:42:56,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 22:42:56,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:42:56,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 22:42:56,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=433, Unknown=1, NotChecked=0, Total=552 [2023-11-06 22:42:57,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 329 [2023-11-06 22:42:57,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 100 transitions, 1041 flow. Second operand has 24 states, 24 states have (on average 101.5) internal successors, (2436), 24 states have internal predecessors, (2436), 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) [2023-11-06 22:42:57,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:42:57,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 329 [2023-11-06 22:42:57,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:42:58,848 INFO L124 PetriNetUnfolderBase]: 686/1123 cut-off events. [2023-11-06 22:42:58,848 INFO L125 PetriNetUnfolderBase]: For 8901/8931 co-relation queries the response was YES. [2023-11-06 22:42:58,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6927 conditions, 1123 events. 686/1123 cut-off events. For 8901/8931 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 5076 event pairs, 172 based on Foata normal form. 175/1282 useless extension candidates. Maximal degree in co-relation 6896. Up to 734 conditions per place. [2023-11-06 22:42:58,855 INFO L140 encePairwiseOnDemand]: 320/329 looper letters, 139 selfloop transitions, 56 changer transitions 2/198 dead transitions. [2023-11-06 22:42:58,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 198 transitions, 2375 flow [2023-11-06 22:42:58,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-06 22:42:58,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-06 22:42:58,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1895 transitions. [2023-11-06 22:42:58,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3199932455251604 [2023-11-06 22:42:58,860 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1895 transitions. [2023-11-06 22:42:58,860 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1895 transitions. [2023-11-06 22:42:58,861 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:42:58,861 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1895 transitions. [2023-11-06 22:42:58,865 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 105.27777777777777) internal successors, (1895), 18 states have internal predecessors, (1895), 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) [2023-11-06 22:42:58,870 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 329.0) internal successors, (6251), 19 states have internal predecessors, (6251), 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) [2023-11-06 22:42:58,871 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 329.0) internal successors, (6251), 19 states have internal predecessors, (6251), 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) [2023-11-06 22:42:58,872 INFO L175 Difference]: Start difference. First operand has 84 places, 100 transitions, 1041 flow. Second operand 18 states and 1895 transitions. [2023-11-06 22:42:58,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 198 transitions, 2375 flow [2023-11-06 22:42:58,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 198 transitions, 2209 flow, removed 68 selfloop flow, removed 8 redundant places. [2023-11-06 22:42:58,904 INFO L231 Difference]: Finished difference. Result has 99 places, 149 transitions, 1872 flow [2023-11-06 22:42:58,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=329, PETRI_DIFFERENCE_MINUEND_FLOW=969, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1872, PETRI_PLACES=99, PETRI_TRANSITIONS=149} [2023-11-06 22:42:58,905 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 68 predicate places. [2023-11-06 22:42:58,905 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 149 transitions, 1872 flow [2023-11-06 22:42:58,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 101.5) internal successors, (2436), 24 states have internal predecessors, (2436), 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) [2023-11-06 22:42:58,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:42:58,906 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:42:58,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-06 22:42:59,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:42:59,112 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-06 22:42:59,113 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:42:59,113 INFO L85 PathProgramCache]: Analyzing trace with hash 827983745, now seen corresponding path program 1 times [2023-11-06 22:42:59,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:42:59,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518898646] [2023-11-06 22:42:59,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:59,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:42:59,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:59,730 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:42:59,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:42:59,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518898646] [2023-11-06 22:42:59,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518898646] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:42:59,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600864439] [2023-11-06 22:42:59,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:59,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:42:59,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:42:59,736 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:42:59,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-06 22:42:59,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:59,880 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-06 22:42:59,885 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:43:00,057 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:43:00,057 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:43:00,216 INFO L322 Elim1Store]: treesize reduction 13, result has 64.9 percent of original size [2023-11-06 22:43:00,216 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 37 [2023-11-06 22:43:00,239 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:43:00,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600864439] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:43:00,239 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:43:00,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 5] total 18 [2023-11-06 22:43:00,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075092148] [2023-11-06 22:43:00,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:43:00,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-06 22:43:00,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:43:00,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-06 22:43:00,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2023-11-06 22:43:01,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 329 [2023-11-06 22:43:01,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 149 transitions, 1872 flow. Second operand has 20 states, 20 states have (on average 126.5) internal successors, (2530), 20 states have internal predecessors, (2530), 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) [2023-11-06 22:43:01,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:43:01,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 329 [2023-11-06 22:43:01,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:43:03,418 INFO L124 PetriNetUnfolderBase]: 1001/1644 cut-off events. [2023-11-06 22:43:03,418 INFO L125 PetriNetUnfolderBase]: For 16201/16231 co-relation queries the response was YES. [2023-11-06 22:43:03,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11774 conditions, 1644 events. 1001/1644 cut-off events. For 16201/16231 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 8197 event pairs, 76 based on Foata normal form. 68/1702 useless extension candidates. Maximal degree in co-relation 11737. Up to 747 conditions per place. [2023-11-06 22:43:03,431 INFO L140 encePairwiseOnDemand]: 319/329 looper letters, 185 selfloop transitions, 168 changer transitions 3/357 dead transitions. [2023-11-06 22:43:03,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 357 transitions, 4918 flow [2023-11-06 22:43:03,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-06 22:43:03,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-11-06 22:43:03,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 4171 transitions. [2023-11-06 22:43:03,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39618161094224924 [2023-11-06 22:43:03,438 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 4171 transitions. [2023-11-06 22:43:03,438 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 4171 transitions. [2023-11-06 22:43:03,440 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:43:03,440 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 4171 transitions. [2023-11-06 22:43:03,447 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 130.34375) internal successors, (4171), 32 states have internal predecessors, (4171), 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) [2023-11-06 22:43:03,457 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 329.0) internal successors, (10857), 33 states have internal predecessors, (10857), 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) [2023-11-06 22:43:03,459 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 329.0) internal successors, (10857), 33 states have internal predecessors, (10857), 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) [2023-11-06 22:43:03,460 INFO L175 Difference]: Start difference. First operand has 99 places, 149 transitions, 1872 flow. Second operand 32 states and 4171 transitions. [2023-11-06 22:43:03,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 357 transitions, 4918 flow [2023-11-06 22:43:03,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 357 transitions, 4553 flow, removed 179 selfloop flow, removed 3 redundant places. [2023-11-06 22:43:03,543 INFO L231 Difference]: Finished difference. Result has 143 places, 255 transitions, 3790 flow [2023-11-06 22:43:03,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=329, PETRI_DIFFERENCE_MINUEND_FLOW=1651, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=3790, PETRI_PLACES=143, PETRI_TRANSITIONS=255} [2023-11-06 22:43:03,544 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 112 predicate places. [2023-11-06 22:43:03,544 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 255 transitions, 3790 flow [2023-11-06 22:43:03,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 126.5) internal successors, (2530), 20 states have internal predecessors, (2530), 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) [2023-11-06 22:43:03,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:43:03,545 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:43:03,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-06 22:43:03,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:43:03,751 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-06 22:43:03,751 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:43:03,751 INFO L85 PathProgramCache]: Analyzing trace with hash 500191203, now seen corresponding path program 2 times [2023-11-06 22:43:03,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:43:03,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586084292] [2023-11-06 22:43:03,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:43:03,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:43:03,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:43:04,463 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:43:04,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:43:04,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586084292] [2023-11-06 22:43:04,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586084292] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:43:04,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949080171] [2023-11-06 22:43:04,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:43:04,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:43:04,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:43:04,465 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:43:04,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-06 22:43:04,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:43:04,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:43:04,617 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-06 22:43:04,619 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:43:04,732 INFO L351 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 [2023-11-06 22:43:04,795 INFO L351 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 8 treesize of output 1 [2023-11-06 22:43:04,846 INFO L351 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 8 treesize of output 1 [2023-11-06 22:43:05,098 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:43:05,098 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:43:06,055 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:43:06,056 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 83 [2023-11-06 22:43:06,135 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-11-06 22:43:06,135 INFO L351 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 530 treesize of output 500 [2023-11-06 22:43:06,165 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:43:06,193 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:43:06,194 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 169 treesize of output 180 [2023-11-06 22:43:06,257 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-11-06 22:43:06,257 INFO L351 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 167 treesize of output 153 [2023-11-06 22:43:07,905 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:43:07,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949080171] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:43:07,906 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:43:07,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 26 [2023-11-06 22:43:07,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211736700] [2023-11-06 22:43:07,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:43:07,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-06 22:43:07,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:43:07,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-06 22:43:07,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=623, Unknown=2, NotChecked=0, Total=756 [2023-11-06 22:43:09,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 329 [2023-11-06 22:43:09,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 255 transitions, 3790 flow. Second operand has 28 states, 28 states have (on average 101.28571428571429) internal successors, (2836), 28 states have internal predecessors, (2836), 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) [2023-11-06 22:43:09,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:43:09,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 329 [2023-11-06 22:43:09,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:43:13,457 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:43:17,938 INFO L124 PetriNetUnfolderBase]: 1105/1900 cut-off events. [2023-11-06 22:43:17,938 INFO L125 PetriNetUnfolderBase]: For 24681/24704 co-relation queries the response was YES. [2023-11-06 22:43:17,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15106 conditions, 1900 events. 1105/1900 cut-off events. For 24681/24704 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 10570 event pairs, 211 based on Foata normal form. 81/1981 useless extension candidates. Maximal degree in co-relation 15052. Up to 1090 conditions per place. [2023-11-06 22:43:17,956 INFO L140 encePairwiseOnDemand]: 320/329 looper letters, 237 selfloop transitions, 152 changer transitions 0/390 dead transitions. [2023-11-06 22:43:17,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 390 transitions, 5936 flow [2023-11-06 22:43:17,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-06 22:43:17,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-11-06 22:43:18,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 3650 transitions. [2023-11-06 22:43:18,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31697785497177594 [2023-11-06 22:43:18,010 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 3650 transitions. [2023-11-06 22:43:18,010 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 3650 transitions. [2023-11-06 22:43:18,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:43:18,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 3650 transitions. [2023-11-06 22:43:18,023 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 104.28571428571429) internal successors, (3650), 35 states have internal predecessors, (3650), 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) [2023-11-06 22:43:18,035 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 329.0) internal successors, (11844), 36 states have internal predecessors, (11844), 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) [2023-11-06 22:43:18,037 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 329.0) internal successors, (11844), 36 states have internal predecessors, (11844), 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) [2023-11-06 22:43:18,037 INFO L175 Difference]: Start difference. First operand has 143 places, 255 transitions, 3790 flow. Second operand 35 states and 3650 transitions. [2023-11-06 22:43:18,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 390 transitions, 5936 flow [2023-11-06 22:43:18,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 390 transitions, 5339 flow, removed 278 selfloop flow, removed 5 redundant places. [2023-11-06 22:43:18,183 INFO L231 Difference]: Finished difference. Result has 185 places, 323 transitions, 4830 flow [2023-11-06 22:43:18,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=329, PETRI_DIFFERENCE_MINUEND_FLOW=3284, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=4830, PETRI_PLACES=185, PETRI_TRANSITIONS=323} [2023-11-06 22:43:18,184 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 154 predicate places. [2023-11-06 22:43:18,184 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 323 transitions, 4830 flow [2023-11-06 22:43:18,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 101.28571428571429) internal successors, (2836), 28 states have internal predecessors, (2836), 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) [2023-11-06 22:43:18,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:43:18,185 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:43:18,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-11-06 22:43:18,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:43:18,391 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-06 22:43:18,392 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:43:18,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1612865933, now seen corresponding path program 1 times [2023-11-06 22:43:18,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:43:18,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934476844] [2023-11-06 22:43:18,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:43:18,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:43:18,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:43:18,796 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:43:18,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:43:18,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934476844] [2023-11-06 22:43:18,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934476844] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:43:18,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215353948] [2023-11-06 22:43:18,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:43:18,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:43:18,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:43:18,800 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:43:18,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-06 22:43:18,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:43:18,938 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-06 22:43:18,939 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:43:19,237 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:43:19,237 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:43:19,278 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:43:19,278 INFO L351 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 [2023-11-06 22:43:19,685 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:43:19,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215353948] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:43:19,686 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:43:19,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2023-11-06 22:43:19,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841737937] [2023-11-06 22:43:19,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:43:19,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-06 22:43:19,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:43:19,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-06 22:43:19,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2023-11-06 22:43:20,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 329 [2023-11-06 22:43:20,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 323 transitions, 4830 flow. Second operand has 23 states, 23 states have (on average 124.56521739130434) internal successors, (2865), 23 states have internal predecessors, (2865), 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) [2023-11-06 22:43:20,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:43:20,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 329 [2023-11-06 22:43:20,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:43:21,645 INFO L124 PetriNetUnfolderBase]: 826/1426 cut-off events. [2023-11-06 22:43:21,646 INFO L125 PetriNetUnfolderBase]: For 17208/17231 co-relation queries the response was YES. [2023-11-06 22:43:21,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11277 conditions, 1426 events. 826/1426 cut-off events. For 17208/17231 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 7291 event pairs, 58 based on Foata normal form. 85/1505 useless extension candidates. Maximal degree in co-relation 11211. Up to 889 conditions per place. [2023-11-06 22:43:21,660 INFO L140 encePairwiseOnDemand]: 321/329 looper letters, 164 selfloop transitions, 119 changer transitions 12/296 dead transitions. [2023-11-06 22:43:21,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 296 transitions, 4577 flow [2023-11-06 22:43:21,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 22:43:21,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-06 22:43:21,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1802 transitions. [2023-11-06 22:43:21,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39122883195831526 [2023-11-06 22:43:21,664 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1802 transitions. [2023-11-06 22:43:21,664 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1802 transitions. [2023-11-06 22:43:21,664 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:43:21,664 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1802 transitions. [2023-11-06 22:43:21,667 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 128.71428571428572) internal successors, (1802), 14 states have internal predecessors, (1802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:21,671 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 329.0) internal successors, (4935), 15 states have internal predecessors, (4935), 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) [2023-11-06 22:43:21,672 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 329.0) internal successors, (4935), 15 states have internal predecessors, (4935), 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) [2023-11-06 22:43:21,673 INFO L175 Difference]: Start difference. First operand has 185 places, 323 transitions, 4830 flow. Second operand 14 states and 1802 transitions. [2023-11-06 22:43:21,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 296 transitions, 4577 flow [2023-11-06 22:43:21,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 296 transitions, 4306 flow, removed 116 selfloop flow, removed 12 redundant places. [2023-11-06 22:43:21,813 INFO L231 Difference]: Finished difference. Result has 182 places, 259 transitions, 3830 flow [2023-11-06 22:43:21,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=329, PETRI_DIFFERENCE_MINUEND_FLOW=3195, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3830, PETRI_PLACES=182, PETRI_TRANSITIONS=259} [2023-11-06 22:43:21,814 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 151 predicate places. [2023-11-06 22:43:21,815 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 259 transitions, 3830 flow [2023-11-06 22:43:21,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 124.56521739130434) internal successors, (2865), 23 states have internal predecessors, (2865), 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) [2023-11-06 22:43:21,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:43:21,815 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:43:21,821 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-06 22:43:22,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-06 22:43:22,021 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-06 22:43:22,022 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:43:22,022 INFO L85 PathProgramCache]: Analyzing trace with hash 621878789, now seen corresponding path program 2 times [2023-11-06 22:43:22,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:43:22,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444777229] [2023-11-06 22:43:22,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:43:22,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:43:22,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:43:22,549 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:43:22,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:43:22,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444777229] [2023-11-06 22:43:22,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444777229] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:43:22,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121257285] [2023-11-06 22:43:22,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:43:22,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:43:22,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:43:22,556 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:43:22,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-06 22:43:22,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:43:22,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:43:22,715 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-06 22:43:22,717 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:43:22,845 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 22:43:22,904 INFO L351 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 8 treesize of output 1 [2023-11-06 22:43:22,970 INFO L351 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 8 treesize of output 1 [2023-11-06 22:43:23,275 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:43:23,275 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:43:24,034 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:43:24,035 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 84 [2023-11-06 22:43:24,089 INFO L322 Elim1Store]: treesize reduction 13, result has 64.9 percent of original size [2023-11-06 22:43:24,090 INFO L351 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 538 treesize of output 493 [2023-11-06 22:43:24,115 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:43:24,119 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:43:24,137 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:43:24,137 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 170 treesize of output 164 [2023-11-06 22:43:24,187 INFO L322 Elim1Store]: treesize reduction 16, result has 56.8 percent of original size [2023-11-06 22:43:24,187 INFO L351 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 169 treesize of output 137 [2023-11-06 22:43:24,931 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:43:24,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121257285] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:43:24,931 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:43:24,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 25 [2023-11-06 22:43:24,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451858466] [2023-11-06 22:43:24,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:43:24,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-06 22:43:24,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:43:24,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-06 22:43:24,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=598, Unknown=1, NotChecked=0, Total=702 [2023-11-06 22:43:26,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 329 [2023-11-06 22:43:26,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 259 transitions, 3830 flow. Second operand has 27 states, 27 states have (on average 101.33333333333333) internal successors, (2736), 27 states have internal predecessors, (2736), 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) [2023-11-06 22:43:26,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:43:26,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 329 [2023-11-06 22:43:26,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:43:30,164 INFO L124 PetriNetUnfolderBase]: 869/1501 cut-off events. [2023-11-06 22:43:30,165 INFO L125 PetriNetUnfolderBase]: For 18266/18299 co-relation queries the response was YES. [2023-11-06 22:43:30,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11615 conditions, 1501 events. 869/1501 cut-off events. For 18266/18299 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 7702 event pairs, 107 based on Foata normal form. 65/1566 useless extension candidates. Maximal degree in co-relation 11552. Up to 1131 conditions per place. [2023-11-06 22:43:30,178 INFO L140 encePairwiseOnDemand]: 319/329 looper letters, 244 selfloop transitions, 84 changer transitions 34/363 dead transitions. [2023-11-06 22:43:30,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 363 transitions, 5251 flow [2023-11-06 22:43:30,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-06 22:43:30,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-11-06 22:43:30,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 3757 transitions. [2023-11-06 22:43:30,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31720702465383316 [2023-11-06 22:43:30,186 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 3757 transitions. [2023-11-06 22:43:30,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 3757 transitions. [2023-11-06 22:43:30,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:43:30,188 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 3757 transitions. [2023-11-06 22:43:30,194 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 104.36111111111111) internal successors, (3757), 36 states have internal predecessors, (3757), 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) [2023-11-06 22:43:30,205 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 329.0) internal successors, (12173), 37 states have internal predecessors, (12173), 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) [2023-11-06 22:43:30,207 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 329.0) internal successors, (12173), 37 states have internal predecessors, (12173), 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) [2023-11-06 22:43:30,207 INFO L175 Difference]: Start difference. First operand has 182 places, 259 transitions, 3830 flow. Second operand 36 states and 3757 transitions. [2023-11-06 22:43:30,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 363 transitions, 5251 flow [2023-11-06 22:43:30,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 363 transitions, 4989 flow, removed 45 selfloop flow, removed 15 redundant places. [2023-11-06 22:43:30,328 INFO L231 Difference]: Finished difference. Result has 205 places, 276 transitions, 4077 flow [2023-11-06 22:43:30,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=329, PETRI_DIFFERENCE_MINUEND_FLOW=3581, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=4077, PETRI_PLACES=205, PETRI_TRANSITIONS=276} [2023-11-06 22:43:30,329 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 174 predicate places. [2023-11-06 22:43:30,329 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 276 transitions, 4077 flow [2023-11-06 22:43:30,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 101.33333333333333) internal successors, (2736), 27 states have internal predecessors, (2736), 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) [2023-11-06 22:43:30,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:43:30,330 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:43:30,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-11-06 22:43:30,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:43:30,537 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-06 22:43:30,537 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:43:30,537 INFO L85 PathProgramCache]: Analyzing trace with hash 827958635, now seen corresponding path program 3 times [2023-11-06 22:43:30,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:43:30,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322763708] [2023-11-06 22:43:30,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:43:30,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:43:30,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:43:31,290 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:43:31,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:43:31,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322763708] [2023-11-06 22:43:31,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322763708] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:43:31,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015721417] [2023-11-06 22:43:31,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:43:31,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:43:31,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:43:31,293 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:43:31,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-06 22:43:31,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 22:43:31,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:43:31,445 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-06 22:43:31,447 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:43:31,566 INFO L351 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 [2023-11-06 22:43:31,630 INFO L351 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 8 treesize of output 1 [2023-11-06 22:43:31,677 INFO L351 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 8 treesize of output 1 [2023-11-06 22:43:32,074 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:43:32,075 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:43:33,048 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:43:33,049 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 118 treesize of output 82 [2023-11-06 22:43:33,114 INFO L322 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2023-11-06 22:43:33,115 INFO L351 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 246 treesize of output 246 [2023-11-06 22:43:33,185 INFO L322 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2023-11-06 22:43:33,185 INFO L351 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 214 treesize of output 198 [2023-11-06 22:43:33,264 INFO L322 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2023-11-06 22:43:33,264 INFO L351 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 141 treesize of output 149 [2023-11-06 22:43:34,846 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:43:34,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015721417] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:43:34,846 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:43:34,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 26 [2023-11-06 22:43:34,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405268802] [2023-11-06 22:43:34,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:43:34,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-06 22:43:34,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:43:34,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-06 22:43:34,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=642, Unknown=2, NotChecked=0, Total=756 [2023-11-06 22:43:36,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 329 [2023-11-06 22:43:36,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 276 transitions, 4077 flow. Second operand has 28 states, 28 states have (on average 101.28571428571429) internal successors, (2836), 28 states have internal predecessors, (2836), 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) [2023-11-06 22:43:36,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:43:36,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 329 [2023-11-06 22:43:36,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:43:39,213 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-06 22:43:41,233 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-06 22:43:46,880 INFO L124 PetriNetUnfolderBase]: 837/1434 cut-off events. [2023-11-06 22:43:46,880 INFO L125 PetriNetUnfolderBase]: For 17154/17187 co-relation queries the response was YES. [2023-11-06 22:43:46,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11151 conditions, 1434 events. 837/1434 cut-off events. For 17154/17187 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 7158 event pairs, 227 based on Foata normal form. 51/1485 useless extension candidates. Maximal degree in co-relation 11087. Up to 1176 conditions per place. [2023-11-06 22:43:46,894 INFO L140 encePairwiseOnDemand]: 320/329 looper letters, 257 selfloop transitions, 55 changer transitions 7/320 dead transitions. [2023-11-06 22:43:46,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 320 transitions, 4870 flow [2023-11-06 22:43:46,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-06 22:43:46,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-11-06 22:43:46,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 3316 transitions. [2023-11-06 22:43:46,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3149696048632219 [2023-11-06 22:43:46,900 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 3316 transitions. [2023-11-06 22:43:46,900 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 3316 transitions. [2023-11-06 22:43:46,901 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:43:46,901 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 3316 transitions. [2023-11-06 22:43:46,904 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 103.625) internal successors, (3316), 32 states have internal predecessors, (3316), 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) [2023-11-06 22:43:46,912 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 329.0) internal successors, (10857), 33 states have internal predecessors, (10857), 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) [2023-11-06 22:43:46,914 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 329.0) internal successors, (10857), 33 states have internal predecessors, (10857), 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) [2023-11-06 22:43:46,914 INFO L175 Difference]: Start difference. First operand has 205 places, 276 transitions, 4077 flow. Second operand 32 states and 3316 transitions. [2023-11-06 22:43:46,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 320 transitions, 4870 flow [2023-11-06 22:43:47,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 320 transitions, 4673 flow, removed 58 selfloop flow, removed 21 redundant places. [2023-11-06 22:43:47,022 INFO L231 Difference]: Finished difference. Result has 206 places, 273 transitions, 3987 flow [2023-11-06 22:43:47,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=329, PETRI_DIFFERENCE_MINUEND_FLOW=3782, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=3987, PETRI_PLACES=206, PETRI_TRANSITIONS=273} [2023-11-06 22:43:47,023 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 175 predicate places. [2023-11-06 22:43:47,023 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 273 transitions, 3987 flow [2023-11-06 22:43:47,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 101.28571428571429) internal successors, (2836), 28 states have internal predecessors, (2836), 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) [2023-11-06 22:43:47,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:43:47,024 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:43:47,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-11-06 22:43:47,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:43:47,227 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-06 22:43:47,228 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:43:47,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1616726487, now seen corresponding path program 4 times [2023-11-06 22:43:47,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:43:47,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676782968] [2023-11-06 22:43:47,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:43:47,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:43:47,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:43:48,149 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:43:48,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:43:48,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676782968] [2023-11-06 22:43:48,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676782968] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:43:48,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163558271] [2023-11-06 22:43:48,150 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:43:48,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:43:48,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:43:48,152 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:43:48,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-06 22:43:48,275 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:43:48,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:43:48,276 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-06 22:43:48,277 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:43:48,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:43:48,476 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2023-11-06 22:43:48,681 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:43:48,681 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:43:49,039 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:43:49,040 INFO L351 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 96 treesize of output 98 [2023-11-06 22:43:49,060 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:43:49,061 INFO L351 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 48 treesize of output 46 [2023-11-06 22:43:49,641 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:43:49,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163558271] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:43:49,642 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:43:49,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2023-11-06 22:43:49,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315281601] [2023-11-06 22:43:49,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:43:49,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-06 22:43:49,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:43:49,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-06 22:43:49,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=699, Unknown=1, NotChecked=0, Total=812 [2023-11-06 22:43:51,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 329 [2023-11-06 22:43:51,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 273 transitions, 3987 flow. Second operand has 29 states, 29 states have (on average 101.24137931034483) internal successors, (2936), 29 states have internal predecessors, (2936), 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) [2023-11-06 22:43:51,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:43:51,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 329 [2023-11-06 22:43:51,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:43:55,043 INFO L124 PetriNetUnfolderBase]: 1142/1882 cut-off events. [2023-11-06 22:43:55,043 INFO L125 PetriNetUnfolderBase]: For 23768/23801 co-relation queries the response was YES. [2023-11-06 22:43:55,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14829 conditions, 1882 events. 1142/1882 cut-off events. For 23768/23801 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 9492 event pairs, 69 based on Foata normal form. 61/1943 useless extension candidates. Maximal degree in co-relation 14770. Up to 1095 conditions per place. [2023-11-06 22:43:55,060 INFO L140 encePairwiseOnDemand]: 319/329 looper letters, 260 selfloop transitions, 118 changer transitions 0/379 dead transitions. [2023-11-06 22:43:55,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 379 transitions, 5855 flow [2023-11-06 22:43:55,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-06 22:43:55,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-06 22:43:55,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3032 transitions. [2023-11-06 22:43:55,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3177863955560214 [2023-11-06 22:43:55,065 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3032 transitions. [2023-11-06 22:43:55,065 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3032 transitions. [2023-11-06 22:43:55,067 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:43:55,067 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3032 transitions. [2023-11-06 22:43:55,072 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 104.55172413793103) internal successors, (3032), 29 states have internal predecessors, (3032), 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) [2023-11-06 22:43:55,081 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 329.0) internal successors, (9870), 30 states have internal predecessors, (9870), 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) [2023-11-06 22:43:55,083 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 329.0) internal successors, (9870), 30 states have internal predecessors, (9870), 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) [2023-11-06 22:43:55,083 INFO L175 Difference]: Start difference. First operand has 206 places, 273 transitions, 3987 flow. Second operand 29 states and 3032 transitions. [2023-11-06 22:43:55,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 379 transitions, 5855 flow [2023-11-06 22:43:55,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 379 transitions, 5689 flow, removed 26 selfloop flow, removed 26 redundant places. [2023-11-06 22:43:55,228 INFO L231 Difference]: Finished difference. Result has 211 places, 301 transitions, 4625 flow [2023-11-06 22:43:55,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=329, PETRI_DIFFERENCE_MINUEND_FLOW=3753, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=4625, PETRI_PLACES=211, PETRI_TRANSITIONS=301} [2023-11-06 22:43:55,229 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 180 predicate places. [2023-11-06 22:43:55,229 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 301 transitions, 4625 flow [2023-11-06 22:43:55,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 101.24137931034483) internal successors, (2936), 29 states have internal predecessors, (2936), 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) [2023-11-06 22:43:55,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:43:55,230 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:43:55,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-11-06 22:43:55,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:43:55,431 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-06 22:43:55,431 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:43:55,431 INFO L85 PathProgramCache]: Analyzing trace with hash 500166093, now seen corresponding path program 5 times [2023-11-06 22:43:55,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:43:55,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347628621] [2023-11-06 22:43:55,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:43:55,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:43:55,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:43:56,121 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:43:56,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:43:56,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347628621] [2023-11-06 22:43:56,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347628621] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:43:56,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555127567] [2023-11-06 22:43:56,122 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:43:56,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:43:56,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:43:56,123 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:43:56,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-06 22:43:56,266 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:43:56,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:43:56,269 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-06 22:43:56,271 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:43:56,378 INFO L351 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 [2023-11-06 22:43:56,437 INFO L351 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 8 treesize of output 1 [2023-11-06 22:43:56,489 INFO L351 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 8 treesize of output 1 [2023-11-06 22:43:56,760 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:43:56,760 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:43:57,503 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:43:57,503 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 83 [2023-11-06 22:43:57,558 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-11-06 22:43:57,559 INFO L351 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 250 treesize of output 253 [2023-11-06 22:43:57,626 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-11-06 22:43:57,627 INFO L351 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 217 treesize of output 203 [2023-11-06 22:43:57,689 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-11-06 22:43:57,690 INFO L351 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 142 treesize of output 153 [2023-11-06 22:44:00,335 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:44:00,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555127567] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:44:00,335 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:44:00,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 26 [2023-11-06 22:44:00,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741218586] [2023-11-06 22:44:00,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:44:00,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-06 22:44:00,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:44:00,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-06 22:44:00,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=641, Unknown=1, NotChecked=0, Total=756 [2023-11-06 22:44:00,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 329 [2023-11-06 22:44:00,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 301 transitions, 4625 flow. Second operand has 28 states, 28 states have (on average 101.28571428571429) internal successors, (2836), 28 states have internal predecessors, (2836), 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) [2023-11-06 22:44:00,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:44:00,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 329 [2023-11-06 22:44:00,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:44:03,511 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:44:06,252 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:44:08,295 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:44:11,423 INFO L124 PetriNetUnfolderBase]: 1141/1879 cut-off events. [2023-11-06 22:44:11,423 INFO L125 PetriNetUnfolderBase]: For 26197/26230 co-relation queries the response was YES. [2023-11-06 22:44:11,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15542 conditions, 1879 events. 1141/1879 cut-off events. For 26197/26230 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 9516 event pairs, 280 based on Foata normal form. 35/1914 useless extension candidates. Maximal degree in co-relation 15479. Up to 1593 conditions per place. [2023-11-06 22:44:11,441 INFO L140 encePairwiseOnDemand]: 320/329 looper letters, 284 selfloop transitions, 66 changer transitions 7/358 dead transitions. [2023-11-06 22:44:11,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 358 transitions, 5817 flow [2023-11-06 22:44:11,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-06 22:44:11,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-06 22:44:11,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2995 transitions. [2023-11-06 22:44:11,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31390839534639975 [2023-11-06 22:44:11,446 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2995 transitions. [2023-11-06 22:44:11,447 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2995 transitions. [2023-11-06 22:44:11,448 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:44:11,448 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2995 transitions. [2023-11-06 22:44:11,453 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 103.27586206896552) internal successors, (2995), 29 states have internal predecessors, (2995), 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) [2023-11-06 22:44:11,461 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 329.0) internal successors, (9870), 30 states have internal predecessors, (9870), 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) [2023-11-06 22:44:11,463 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 329.0) internal successors, (9870), 30 states have internal predecessors, (9870), 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) [2023-11-06 22:44:11,463 INFO L175 Difference]: Start difference. First operand has 211 places, 301 transitions, 4625 flow. Second operand 29 states and 2995 transitions. [2023-11-06 22:44:11,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 358 transitions, 5817 flow [2023-11-06 22:44:11,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 358 transitions, 5594 flow, removed 62 selfloop flow, removed 17 redundant places. [2023-11-06 22:44:11,613 INFO L231 Difference]: Finished difference. Result has 223 places, 300 transitions, 4563 flow [2023-11-06 22:44:11,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=329, PETRI_DIFFERENCE_MINUEND_FLOW=4408, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=4563, PETRI_PLACES=223, PETRI_TRANSITIONS=300} [2023-11-06 22:44:11,614 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 192 predicate places. [2023-11-06 22:44:11,614 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 300 transitions, 4563 flow [2023-11-06 22:44:11,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 101.28571428571429) internal successors, (2836), 28 states have internal predecessors, (2836), 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) [2023-11-06 22:44:11,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:44:11,615 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:44:11,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-11-06 22:44:11,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:44:11,815 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-06 22:44:11,815 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:44:11,816 INFO L85 PathProgramCache]: Analyzing trace with hash -736747310, now seen corresponding path program 1 times [2023-11-06 22:44:11,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:44:11,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387661882] [2023-11-06 22:44:11,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:44:11,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:44:11,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:44:12,531 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:44:12,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:44:12,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387661882] [2023-11-06 22:44:12,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387661882] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:44:12,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378473264] [2023-11-06 22:44:12,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:44:12,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:44:12,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:44:12,533 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:44:12,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-06 22:44:12,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:44:12,665 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 22:44:12,667 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:44:12,871 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:44:12,871 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:44:13,114 INFO L322 Elim1Store]: treesize reduction 13, result has 64.9 percent of original size [2023-11-06 22:44:13,114 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 38 [2023-11-06 22:44:13,138 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:44:13,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378473264] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:44:13,138 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:44:13,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 5] total 19 [2023-11-06 22:44:13,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81281324] [2023-11-06 22:44:13,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:44:13,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-06 22:44:13,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:44:13,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-06 22:44:13,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2023-11-06 22:44:14,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 329 [2023-11-06 22:44:14,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 300 transitions, 4563 flow. Second operand has 21 states, 21 states have (on average 126.57142857142857) internal successors, (2658), 21 states have internal predecessors, (2658), 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) [2023-11-06 22:44:14,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:44:14,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 329 [2023-11-06 22:44:14,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:44:16,102 INFO L124 PetriNetUnfolderBase]: 1222/2073 cut-off events. [2023-11-06 22:44:16,102 INFO L125 PetriNetUnfolderBase]: For 29733/29766 co-relation queries the response was YES. [2023-11-06 22:44:16,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16616 conditions, 2073 events. 1222/2073 cut-off events. For 29733/29766 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 11158 event pairs, 106 based on Foata normal form. 83/2156 useless extension candidates. Maximal degree in co-relation 16550. Up to 1391 conditions per place. [2023-11-06 22:44:16,123 INFO L140 encePairwiseOnDemand]: 319/329 looper letters, 242 selfloop transitions, 157 changer transitions 24/424 dead transitions. [2023-11-06 22:44:16,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 424 transitions, 6786 flow [2023-11-06 22:44:16,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-06 22:44:16,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-06 22:44:16,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 3520 transitions. [2023-11-06 22:44:16,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3962625239220984 [2023-11-06 22:44:16,129 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 3520 transitions. [2023-11-06 22:44:16,129 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 3520 transitions. [2023-11-06 22:44:16,131 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:44:16,131 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 3520 transitions. [2023-11-06 22:44:16,136 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 130.37037037037038) internal successors, (3520), 27 states have internal predecessors, (3520), 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) [2023-11-06 22:44:16,144 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 329.0) internal successors, (9212), 28 states have internal predecessors, (9212), 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) [2023-11-06 22:44:16,146 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 329.0) internal successors, (9212), 28 states have internal predecessors, (9212), 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) [2023-11-06 22:44:16,146 INFO L175 Difference]: Start difference. First operand has 223 places, 300 transitions, 4563 flow. Second operand 27 states and 3520 transitions. [2023-11-06 22:44:16,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 424 transitions, 6786 flow [2023-11-06 22:44:16,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 424 transitions, 6696 flow, removed 1 selfloop flow, removed 20 redundant places. [2023-11-06 22:44:16,337 INFO L231 Difference]: Finished difference. Result has 235 places, 343 transitions, 5819 flow [2023-11-06 22:44:16,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=329, PETRI_DIFFERENCE_MINUEND_FLOW=4462, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=5819, PETRI_PLACES=235, PETRI_TRANSITIONS=343} [2023-11-06 22:44:16,337 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 204 predicate places. [2023-11-06 22:44:16,337 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 343 transitions, 5819 flow [2023-11-06 22:44:16,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 126.57142857142857) internal successors, (2658), 21 states have internal predecessors, (2658), 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) [2023-11-06 22:44:16,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:44:16,338 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:44:16,343 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-11-06 22:44:16,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:44:16,538 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-06 22:44:16,539 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:44:16,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1744585972, now seen corresponding path program 4 times [2023-11-06 22:44:16,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:44:16,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844854496] [2023-11-06 22:44:16,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:44:16,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:44:16,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:44:17,243 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:44:17,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:44:17,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844854496] [2023-11-06 22:44:17,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844854496] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:44:17,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290121915] [2023-11-06 22:44:17,244 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:44:17,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:44:17,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:44:17,248 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:44:17,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-06 22:44:17,404 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:44:17,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:44:17,406 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-06 22:44:17,407 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:44:17,623 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:44:17,623 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:44:17,796 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:44:17,799 INFO L351 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 105 treesize of output 73 [2023-11-06 22:44:17,881 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:44:17,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290121915] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:44:17,881 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:44:17,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 5] total 19 [2023-11-06 22:44:17,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44088540] [2023-11-06 22:44:17,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:44:17,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-06 22:44:17,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:44:17,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-06 22:44:17,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2023-11-06 22:44:19,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 329 [2023-11-06 22:44:19,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 343 transitions, 5819 flow. Second operand has 21 states, 21 states have (on average 126.52380952380952) internal successors, (2657), 21 states have internal predecessors, (2657), 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) [2023-11-06 22:44:19,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:44:19,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 329 [2023-11-06 22:44:19,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:44:20,702 INFO L124 PetriNetUnfolderBase]: 1304/2223 cut-off events. [2023-11-06 22:44:20,702 INFO L125 PetriNetUnfolderBase]: For 42960/42990 co-relation queries the response was YES. [2023-11-06 22:44:20,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19167 conditions, 2223 events. 1304/2223 cut-off events. For 42960/42990 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 12158 event pairs, 128 based on Foata normal form. 186/2409 useless extension candidates. Maximal degree in co-relation 19092. Up to 1007 conditions per place. [2023-11-06 22:44:20,724 INFO L140 encePairwiseOnDemand]: 319/329 looper letters, 240 selfloop transitions, 180 changer transitions 4/425 dead transitions. [2023-11-06 22:44:20,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 425 transitions, 7645 flow [2023-11-06 22:44:20,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-06 22:44:20,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-06 22:44:20,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2625 transitions. [2023-11-06 22:44:20,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39893617021276595 [2023-11-06 22:44:20,728 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2625 transitions. [2023-11-06 22:44:20,728 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2625 transitions. [2023-11-06 22:44:20,729 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:44:20,729 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2625 transitions. [2023-11-06 22:44:20,731 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 131.25) internal successors, (2625), 20 states have internal predecessors, (2625), 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) [2023-11-06 22:44:20,735 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 329.0) internal successors, (6909), 21 states have internal predecessors, (6909), 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) [2023-11-06 22:44:20,736 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 329.0) internal successors, (6909), 21 states have internal predecessors, (6909), 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) [2023-11-06 22:44:20,736 INFO L175 Difference]: Start difference. First operand has 235 places, 343 transitions, 5819 flow. Second operand 20 states and 2625 transitions. [2023-11-06 22:44:20,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 425 transitions, 7645 flow [2023-11-06 22:44:20,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 425 transitions, 7248 flow, removed 166 selfloop flow, removed 9 redundant places. [2023-11-06 22:44:20,960 INFO L231 Difference]: Finished difference. Result has 245 places, 343 transitions, 5968 flow [2023-11-06 22:44:20,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=329, PETRI_DIFFERENCE_MINUEND_FLOW=4992, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=5968, PETRI_PLACES=245, PETRI_TRANSITIONS=343} [2023-11-06 22:44:20,961 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 214 predicate places. [2023-11-06 22:44:20,961 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 343 transitions, 5968 flow [2023-11-06 22:44:20,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 126.52380952380952) internal successors, (2657), 21 states have internal predecessors, (2657), 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) [2023-11-06 22:44:20,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:44:20,962 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:44:20,966 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-11-06 22:44:21,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-11-06 22:44:21,162 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-06 22:44:21,162 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:44:21,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1612866987, now seen corresponding path program 6 times [2023-11-06 22:44:21,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:44:21,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263976729] [2023-11-06 22:44:21,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:44:21,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:44:21,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:44:21,896 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:44:21,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:44:21,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263976729] [2023-11-06 22:44:21,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263976729] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:44:21,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34173527] [2023-11-06 22:44:21,897 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:44:21,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:44:21,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:44:21,898 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:44:21,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-06 22:44:22,033 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-06 22:44:22,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:44:22,034 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-06 22:44:22,037 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:44:22,129 INFO L351 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 [2023-11-06 22:44:22,179 INFO L351 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 8 treesize of output 1 [2023-11-06 22:44:22,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:44:22,272 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-06 22:44:22,583 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:44:22,583 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:44:23,276 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:44:23,276 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 80 [2023-11-06 22:44:23,323 INFO L322 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2023-11-06 22:44:23,323 INFO L351 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 210 treesize of output 205 [2023-11-06 22:44:23,338 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 22:44:23,347 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:44:23,347 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 153 treesize of output 125 [2023-11-06 22:44:23,395 INFO L322 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2023-11-06 22:44:23,395 INFO L351 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 114 treesize of output 117 [2023-11-06 22:44:24,419 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:44:24,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34173527] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:44:24,419 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:44:24,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2023-11-06 22:44:24,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659005948] [2023-11-06 22:44:24,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:44:24,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-06 22:44:24,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:44:24,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-06 22:44:24,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=669, Unknown=1, NotChecked=0, Total=812 [2023-11-06 22:44:26,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 329 [2023-11-06 22:44:26,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 343 transitions, 5968 flow. Second operand has 29 states, 29 states have (on average 101.24137931034483) internal successors, (2936), 29 states have internal predecessors, (2936), 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) [2023-11-06 22:44:26,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:44:26,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 329 [2023-11-06 22:44:26,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:44:29,717 INFO L124 PetriNetUnfolderBase]: 1396/2373 cut-off events. [2023-11-06 22:44:29,718 INFO L125 PetriNetUnfolderBase]: For 44365/44380 co-relation queries the response was YES. [2023-11-06 22:44:29,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21076 conditions, 2373 events. 1396/2373 cut-off events. For 44365/44380 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 13031 event pairs, 252 based on Foata normal form. 49/2418 useless extension candidates. Maximal degree in co-relation 20997. Up to 1705 conditions per place. [2023-11-06 22:44:29,744 INFO L140 encePairwiseOnDemand]: 320/329 looper letters, 251 selfloop transitions, 187 changer transitions 3/442 dead transitions. [2023-11-06 22:44:29,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 442 transitions, 8364 flow [2023-11-06 22:44:29,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-06 22:44:29,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-06 22:44:29,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2294 transitions. [2023-11-06 22:44:29,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.316938380768168 [2023-11-06 22:44:29,749 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2294 transitions. [2023-11-06 22:44:29,749 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2294 transitions. [2023-11-06 22:44:29,750 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:44:29,750 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2294 transitions. [2023-11-06 22:44:29,753 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 104.27272727272727) internal successors, (2294), 22 states have internal predecessors, (2294), 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) [2023-11-06 22:44:29,759 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 329.0) internal successors, (7567), 23 states have internal predecessors, (7567), 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) [2023-11-06 22:44:29,761 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 329.0) internal successors, (7567), 23 states have internal predecessors, (7567), 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) [2023-11-06 22:44:29,761 INFO L175 Difference]: Start difference. First operand has 245 places, 343 transitions, 5968 flow. Second operand 22 states and 2294 transitions. [2023-11-06 22:44:29,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 442 transitions, 8364 flow [2023-11-06 22:44:30,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 442 transitions, 7952 flow, removed 141 selfloop flow, removed 10 redundant places. [2023-11-06 22:44:30,060 INFO L231 Difference]: Finished difference. Result has 261 places, 391 transitions, 7247 flow [2023-11-06 22:44:30,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=329, PETRI_DIFFERENCE_MINUEND_FLOW=5604, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=7247, PETRI_PLACES=261, PETRI_TRANSITIONS=391} [2023-11-06 22:44:30,061 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 230 predicate places. [2023-11-06 22:44:30,061 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 391 transitions, 7247 flow [2023-11-06 22:44:30,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 101.24137931034483) internal successors, (2936), 29 states have internal predecessors, (2936), 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) [2023-11-06 22:44:30,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:44:30,061 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:44:30,066 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-11-06 22:44:30,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-11-06 22:44:30,262 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-06 22:44:30,262 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:44:30,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1631555199, now seen corresponding path program 7 times [2023-11-06 22:44:30,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:44:30,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388263359] [2023-11-06 22:44:30,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:44:30,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:44:30,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:44:31,280 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:44:31,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:44:31,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388263359] [2023-11-06 22:44:31,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388263359] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:44:31,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981861152] [2023-11-06 22:44:31,280 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:44:31,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:44:31,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:44:31,282 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:44:31,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-06 22:44:31,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:44:31,431 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-06 22:44:31,432 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:44:31,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:44:31,604 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 25 [2023-11-06 22:44:31,741 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:44:31,741 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:44:32,044 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:44:32,045 INFO L351 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 75 treesize of output 77 [2023-11-06 22:44:32,083 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:44:32,083 INFO L351 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 18 treesize of output 5 [2023-11-06 22:44:32,179 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:44:32,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981861152] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:44:32,180 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:44:32,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 25 [2023-11-06 22:44:32,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306144839] [2023-11-06 22:44:32,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:44:32,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-06 22:44:32,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:44:32,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-06 22:44:32,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=624, Unknown=2, NotChecked=0, Total=702 [2023-11-06 22:44:34,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 329 [2023-11-06 22:44:34,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 391 transitions, 7247 flow. Second operand has 27 states, 27 states have (on average 104.33333333333333) internal successors, (2817), 27 states have internal predecessors, (2817), 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) [2023-11-06 22:44:34,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:44:34,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 329 [2023-11-06 22:44:34,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:44:35,578 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse6 (* c_~q_front~0 4))) (let ((.cse2 (+ .cse6 c_~q~0.offset 4)) (.cse5 (select |c_#memory_int| c_~q~0.base)) (.cse1 (+ .cse6 c_~q~0.offset))) (let ((.cse3 (select .cse5 .cse1)) (.cse4 (select .cse5 .cse2))) (and (forall ((v_ArrVal_946 (Array Int Int))) (< (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_946) c_~q~0.base))) (+ (select .cse0 .cse1) (select .cse0 .cse2))) 2147483648)) (< (+ .cse3 .cse4) 2147483648) (< (+ c_~s~0 .cse3) 2147483648) (< (+ c_~s~0 .cse3 .cse4) 2147483648))))) is different from false [2023-11-06 22:44:36,560 INFO L124 PetriNetUnfolderBase]: 1471/2526 cut-off events. [2023-11-06 22:44:36,560 INFO L125 PetriNetUnfolderBase]: For 54771/54786 co-relation queries the response was YES. [2023-11-06 22:44:36,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23771 conditions, 2526 events. 1471/2526 cut-off events. For 54771/54786 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 14433 event pairs, 15 based on Foata normal form. 113/2635 useless extension candidates. Maximal degree in co-relation 23684. Up to 1175 conditions per place. [2023-11-06 22:44:36,588 INFO L140 encePairwiseOnDemand]: 318/329 looper letters, 241 selfloop transitions, 272 changer transitions 7/521 dead transitions. [2023-11-06 22:44:36,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 521 transitions, 10397 flow [2023-11-06 22:44:36,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-06 22:44:36,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-06 22:44:36,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2932 transitions. [2023-11-06 22:44:36,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3300686704942024 [2023-11-06 22:44:36,594 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2932 transitions. [2023-11-06 22:44:36,594 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2932 transitions. [2023-11-06 22:44:36,595 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:44:36,595 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2932 transitions. [2023-11-06 22:44:36,599 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 108.5925925925926) internal successors, (2932), 27 states have internal predecessors, (2932), 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) [2023-11-06 22:44:36,604 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 329.0) internal successors, (9212), 28 states have internal predecessors, (9212), 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) [2023-11-06 22:44:36,605 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 329.0) internal successors, (9212), 28 states have internal predecessors, (9212), 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) [2023-11-06 22:44:36,605 INFO L175 Difference]: Start difference. First operand has 261 places, 391 transitions, 7247 flow. Second operand 27 states and 2932 transitions. [2023-11-06 22:44:36,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 521 transitions, 10397 flow [2023-11-06 22:44:36,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 521 transitions, 9845 flow, removed 219 selfloop flow, removed 14 redundant places. [2023-11-06 22:44:36,942 INFO L231 Difference]: Finished difference. Result has 274 places, 401 transitions, 7837 flow [2023-11-06 22:44:36,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=329, PETRI_DIFFERENCE_MINUEND_FLOW=6497, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=244, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=7837, PETRI_PLACES=274, PETRI_TRANSITIONS=401} [2023-11-06 22:44:36,943 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 243 predicate places. [2023-11-06 22:44:36,943 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 401 transitions, 7837 flow [2023-11-06 22:44:36,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 104.33333333333333) internal successors, (2817), 27 states have internal predecessors, (2817), 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) [2023-11-06 22:44:36,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:44:36,944 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:44:36,949 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-11-06 22:44:37,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-11-06 22:44:37,145 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-06 22:44:37,145 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:44:37,145 INFO L85 PathProgramCache]: Analyzing trace with hash 2082210582, now seen corresponding path program 1 times [2023-11-06 22:44:37,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:44:37,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498380190] [2023-11-06 22:44:37,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:44:37,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:44:37,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:44:38,302 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:44:38,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:44:38,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498380190] [2023-11-06 22:44:38,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498380190] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:44:38,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648620179] [2023-11-06 22:44:38,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:44:38,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:44:38,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:44:38,304 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:44:38,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-06 22:44:38,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:44:38,444 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-06 22:44:38,445 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:44:38,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:44:38,664 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-06 22:44:38,733 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:44:38,734 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:44:38,884 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:44:38,884 INFO L351 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 42 treesize of output 34 [2023-11-06 22:44:38,889 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2023-11-06 22:44:38,984 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-06 22:44:38,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648620179] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:44:38,985 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:44:38,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 5] total 23 [2023-11-06 22:44:38,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569561632] [2023-11-06 22:44:38,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:44:38,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 22:44:38,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:44:38,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 22:44:38,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=533, Unknown=1, NotChecked=0, Total=600 [2023-11-06 22:44:41,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 329 [2023-11-06 22:44:41,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 401 transitions, 7837 flow. Second operand has 25 states, 25 states have (on average 120.44) internal successors, (3011), 25 states have internal predecessors, (3011), 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) [2023-11-06 22:44:41,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:44:41,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 329 [2023-11-06 22:44:41,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:44:42,833 INFO L124 PetriNetUnfolderBase]: 1713/2928 cut-off events. [2023-11-06 22:44:42,833 INFO L125 PetriNetUnfolderBase]: For 64415/64430 co-relation queries the response was YES. [2023-11-06 22:44:42,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28616 conditions, 2928 events. 1713/2928 cut-off events. For 64415/64430 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 17312 event pairs, 54 based on Foata normal form. 29/2953 useless extension candidates. Maximal degree in co-relation 28526. Up to 1604 conditions per place. [2023-11-06 22:44:42,870 INFO L140 encePairwiseOnDemand]: 322/329 looper letters, 343 selfloop transitions, 169 changer transitions 0/513 dead transitions. [2023-11-06 22:44:42,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 513 transitions, 10935 flow [2023-11-06 22:44:42,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 22:44:42,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-06 22:44:42,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1729 transitions. [2023-11-06 22:44:42,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37537993920972645 [2023-11-06 22:44:42,874 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1729 transitions. [2023-11-06 22:44:42,874 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1729 transitions. [2023-11-06 22:44:42,875 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:44:42,875 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1729 transitions. [2023-11-06 22:44:42,877 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 123.5) internal successors, (1729), 14 states have internal predecessors, (1729), 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) [2023-11-06 22:44:42,880 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 329.0) internal successors, (4935), 15 states have internal predecessors, (4935), 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) [2023-11-06 22:44:42,881 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 329.0) internal successors, (4935), 15 states have internal predecessors, (4935), 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) [2023-11-06 22:44:42,881 INFO L175 Difference]: Start difference. First operand has 274 places, 401 transitions, 7837 flow. Second operand 14 states and 1729 transitions. [2023-11-06 22:44:42,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 513 transitions, 10935 flow [2023-11-06 22:44:43,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 513 transitions, 10042 flow, removed 291 selfloop flow, removed 17 redundant places. [2023-11-06 22:44:43,450 INFO L231 Difference]: Finished difference. Result has 268 places, 435 transitions, 8080 flow [2023-11-06 22:44:43,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=329, PETRI_DIFFERENCE_MINUEND_FLOW=7029, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=8080, PETRI_PLACES=268, PETRI_TRANSITIONS=435} [2023-11-06 22:44:43,451 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 237 predicate places. [2023-11-06 22:44:43,451 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 435 transitions, 8080 flow [2023-11-06 22:44:43,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 120.44) internal successors, (3011), 25 states have internal predecessors, (3011), 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) [2023-11-06 22:44:43,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:44:43,451 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:44:43,456 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-11-06 22:44:43,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-11-06 22:44:43,652 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-06 22:44:43,652 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:44:43,652 INFO L85 PathProgramCache]: Analyzing trace with hash -760780466, now seen corresponding path program 2 times [2023-11-06 22:44:43,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:44:43,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344784976] [2023-11-06 22:44:43,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:44:43,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:44:43,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:44:44,556 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:44:44,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:44:44,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344784976] [2023-11-06 22:44:44,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344784976] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:44:44,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091173122] [2023-11-06 22:44:44,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:44:44,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:44:44,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:44:44,558 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:44:44,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-11-06 22:44:44,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:44:44,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:44:44,704 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-06 22:44:44,705 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:44:45,015 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:44:45,015 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:44:45,225 INFO L322 Elim1Store]: treesize reduction 13, result has 64.9 percent of original size [2023-11-06 22:44:45,226 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 38 [2023-11-06 22:44:45,251 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-06 22:44:45,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091173122] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:44:45,251 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:44:45,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 5] total 21 [2023-11-06 22:44:45,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220338409] [2023-11-06 22:44:45,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:44:45,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-06 22:44:45,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:44:45,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-06 22:44:45,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2023-11-06 22:44:47,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 329 [2023-11-06 22:44:47,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 435 transitions, 8080 flow. Second operand has 23 states, 23 states have (on average 125.47826086956522) internal successors, (2886), 23 states have internal predecessors, (2886), 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) [2023-11-06 22:44:47,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:44:47,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 329 [2023-11-06 22:44:47,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:44:49,262 INFO L124 PetriNetUnfolderBase]: 1712/2959 cut-off events. [2023-11-06 22:44:49,262 INFO L125 PetriNetUnfolderBase]: For 57267/57282 co-relation queries the response was YES. [2023-11-06 22:44:49,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27381 conditions, 2959 events. 1712/2959 cut-off events. For 57267/57282 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 17913 event pairs, 186 based on Foata normal form. 57/3002 useless extension candidates. Maximal degree in co-relation 27298. Up to 1591 conditions per place. [2023-11-06 22:44:49,301 INFO L140 encePairwiseOnDemand]: 319/329 looper letters, 257 selfloop transitions, 237 changer transitions 23/518 dead transitions. [2023-11-06 22:44:49,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 518 transitions, 9888 flow [2023-11-06 22:44:49,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-06 22:44:49,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-06 22:44:49,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 3486 transitions. [2023-11-06 22:44:49,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39243498817966904 [2023-11-06 22:44:49,308 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 3486 transitions. [2023-11-06 22:44:49,308 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 3486 transitions. [2023-11-06 22:44:49,309 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:44:49,310 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 3486 transitions. [2023-11-06 22:44:49,315 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 129.11111111111111) internal successors, (3486), 27 states have internal predecessors, (3486), 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) [2023-11-06 22:44:49,323 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 329.0) internal successors, (9212), 28 states have internal predecessors, (9212), 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) [2023-11-06 22:44:49,405 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 329.0) internal successors, (9212), 28 states have internal predecessors, (9212), 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) [2023-11-06 22:44:49,405 INFO L175 Difference]: Start difference. First operand has 268 places, 435 transitions, 8080 flow. Second operand 27 states and 3486 transitions. [2023-11-06 22:44:49,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 518 transitions, 9888 flow [2023-11-06 22:44:49,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 518 transitions, 9559 flow, removed 3 selfloop flow, removed 9 redundant places. [2023-11-06 22:44:49,785 INFO L231 Difference]: Finished difference. Result has 289 places, 437 transitions, 8344 flow [2023-11-06 22:44:49,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=329, PETRI_DIFFERENCE_MINUEND_FLOW=7743, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=226, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=8344, PETRI_PLACES=289, PETRI_TRANSITIONS=437} [2023-11-06 22:44:49,786 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 258 predicate places. [2023-11-06 22:44:49,786 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 437 transitions, 8344 flow [2023-11-06 22:44:49,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 125.47826086956522) internal successors, (2886), 23 states have internal predecessors, (2886), 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) [2023-11-06 22:44:49,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:44:49,787 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:44:49,791 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-11-06 22:44:49,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-11-06 22:44:49,988 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-06 22:44:49,988 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:44:49,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1210441295, now seen corresponding path program 8 times [2023-11-06 22:44:49,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:44:49,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052046136] [2023-11-06 22:44:49,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:44:49,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:44:50,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:44:51,227 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:44:51,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:44:51,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052046136] [2023-11-06 22:44:51,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052046136] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:44:51,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173506901] [2023-11-06 22:44:51,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:44:51,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:44:51,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:44:51,229 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:44:51,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-11-06 22:44:51,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:44:51,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:44:51,405 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-06 22:44:51,406 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:44:51,683 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:44:51,683 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:44:51,854 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:44:51,855 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 51 [2023-11-06 22:44:51,939 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-06 22:44:51,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173506901] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:44:51,939 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:44:51,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 5] total 22 [2023-11-06 22:44:51,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267466282] [2023-11-06 22:44:51,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:44:51,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 22:44:51,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:44:51,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 22:44:51,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2023-11-06 22:44:54,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 329 [2023-11-06 22:44:54,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 437 transitions, 8344 flow. Second operand has 24 states, 24 states have (on average 124.41666666666667) internal successors, (2986), 24 states have internal predecessors, (2986), 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) [2023-11-06 22:44:54,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:44:54,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 329 [2023-11-06 22:44:54,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:44:56,413 INFO L124 PetriNetUnfolderBase]: 1770/3056 cut-off events. [2023-11-06 22:44:56,413 INFO L125 PetriNetUnfolderBase]: For 60336/60346 co-relation queries the response was YES. [2023-11-06 22:44:56,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28652 conditions, 3056 events. 1770/3056 cut-off events. For 60336/60346 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 18245 event pairs, 291 based on Foata normal form. 76/3120 useless extension candidates. Maximal degree in co-relation 28565. Up to 1667 conditions per place. [2023-11-06 22:44:56,450 INFO L140 encePairwiseOnDemand]: 320/329 looper letters, 332 selfloop transitions, 206 changer transitions 10/549 dead transitions. [2023-11-06 22:44:56,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 549 transitions, 11055 flow [2023-11-06 22:44:56,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-06 22:44:56,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-06 22:44:56,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2947 transitions. [2023-11-06 22:44:56,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3894542090656799 [2023-11-06 22:44:56,455 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2947 transitions. [2023-11-06 22:44:56,455 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2947 transitions. [2023-11-06 22:44:56,456 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:44:56,456 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2947 transitions. [2023-11-06 22:44:56,459 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 128.1304347826087) internal successors, (2947), 23 states have internal predecessors, (2947), 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) [2023-11-06 22:44:56,465 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 329.0) internal successors, (7896), 24 states have internal predecessors, (7896), 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) [2023-11-06 22:44:56,467 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 329.0) internal successors, (7896), 24 states have internal predecessors, (7896), 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) [2023-11-06 22:44:56,467 INFO L175 Difference]: Start difference. First operand has 289 places, 437 transitions, 8344 flow. Second operand 23 states and 2947 transitions. [2023-11-06 22:44:56,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 549 transitions, 11055 flow [2023-11-06 22:44:56,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 549 transitions, 10720 flow, removed 46 selfloop flow, removed 13 redundant places. [2023-11-06 22:44:56,900 INFO L231 Difference]: Finished difference. Result has 299 places, 448 transitions, 8848 flow [2023-11-06 22:44:56,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=329, PETRI_DIFFERENCE_MINUEND_FLOW=7921, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=8848, PETRI_PLACES=299, PETRI_TRANSITIONS=448} [2023-11-06 22:44:56,901 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 268 predicate places. [2023-11-06 22:44:56,901 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 448 transitions, 8848 flow [2023-11-06 22:44:56,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 124.41666666666667) internal successors, (2986), 24 states have internal predecessors, (2986), 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) [2023-11-06 22:44:56,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:44:56,902 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:44:56,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-11-06 22:44:57,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-11-06 22:44:57,103 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-06 22:44:57,104 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:44:57,104 INFO L85 PathProgramCache]: Analyzing trace with hash -517585647, now seen corresponding path program 5 times [2023-11-06 22:44:57,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:44:57,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978262755] [2023-11-06 22:44:57,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:44:57,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:44:57,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:44:57,173 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:44:57,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:44:57,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978262755] [2023-11-06 22:44:57,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978262755] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:44:57,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712135084] [2023-11-06 22:44:57,174 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:44:57,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:44:57,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:44:57,175 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:44:57,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-11-06 22:44:57,327 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-06 22:44:57,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:44:57,329 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:44:57,329 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:44:57,363 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:44:57,364 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:44:57,481 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:44:57,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712135084] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:44:57,482 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:44:57,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 5] total 8 [2023-11-06 22:44:57,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008646213] [2023-11-06 22:44:57,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:44:57,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:44:57,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:44:57,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:44:57,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:44:57,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 329 [2023-11-06 22:44:57,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 448 transitions, 8848 flow. Second operand has 10 states, 10 states have (on average 144.4) internal successors, (1444), 10 states have internal predecessors, (1444), 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) [2023-11-06 22:44:57,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:44:57,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 329 [2023-11-06 22:44:57,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:44:58,655 INFO L124 PetriNetUnfolderBase]: 1981/3396 cut-off events. [2023-11-06 22:44:58,655 INFO L125 PetriNetUnfolderBase]: For 71119/71129 co-relation queries the response was YES. [2023-11-06 22:44:58,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32870 conditions, 3396 events. 1981/3396 cut-off events. For 71119/71129 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 20673 event pairs, 153 based on Foata normal form. 60/3444 useless extension candidates. Maximal degree in co-relation 32780. Up to 2029 conditions per place. [2023-11-06 22:44:58,695 INFO L140 encePairwiseOnDemand]: 323/329 looper letters, 247 selfloop transitions, 236 changer transitions 48/532 dead transitions. [2023-11-06 22:44:58,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 532 transitions, 11596 flow [2023-11-06 22:44:58,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:44:58,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:44:58,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 758 transitions. [2023-11-06 22:44:58,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.460790273556231 [2023-11-06 22:44:58,697 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 758 transitions. [2023-11-06 22:44:58,697 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 758 transitions. [2023-11-06 22:44:58,697 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:44:58,697 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 758 transitions. [2023-11-06 22:44:58,698 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 151.6) internal successors, (758), 5 states have internal predecessors, (758), 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) [2023-11-06 22:44:58,698 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 329.0) internal successors, (1974), 6 states have internal predecessors, (1974), 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) [2023-11-06 22:44:58,699 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 329.0) internal successors, (1974), 6 states have internal predecessors, (1974), 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) [2023-11-06 22:44:58,699 INFO L175 Difference]: Start difference. First operand has 299 places, 448 transitions, 8848 flow. Second operand 5 states and 758 transitions. [2023-11-06 22:44:58,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 532 transitions, 11596 flow [2023-11-06 22:44:59,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 532 transitions, 11334 flow, removed 72 selfloop flow, removed 20 redundant places. [2023-11-06 22:44:59,088 INFO L231 Difference]: Finished difference. Result has 281 places, 466 transitions, 10228 flow [2023-11-06 22:44:59,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=329, PETRI_DIFFERENCE_MINUEND_FLOW=8411, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=10228, PETRI_PLACES=281, PETRI_TRANSITIONS=466} [2023-11-06 22:44:59,089 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 250 predicate places. [2023-11-06 22:44:59,089 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 466 transitions, 10228 flow [2023-11-06 22:44:59,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 144.4) internal successors, (1444), 10 states have internal predecessors, (1444), 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) [2023-11-06 22:44:59,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:44:59,090 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:44:59,094 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2023-11-06 22:44:59,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2023-11-06 22:44:59,290 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-06 22:44:59,291 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:44:59,291 INFO L85 PathProgramCache]: Analyzing trace with hash 234067232, now seen corresponding path program 6 times [2023-11-06 22:44:59,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:44:59,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232785668] [2023-11-06 22:44:59,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:44:59,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:44:59,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:45:00,193 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:45:00,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:45:00,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232785668] [2023-11-06 22:45:00,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232785668] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:45:00,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885552264] [2023-11-06 22:45:00,194 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:45:00,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:45:00,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:45:00,195 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:45:00,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-11-06 22:45:00,363 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-06 22:45:00,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:45:00,365 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-06 22:45:00,366 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:45:00,583 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:45:00,583 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:45:00,673 INFO L322 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-11-06 22:45:00,673 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2023-11-06 22:45:00,691 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-06 22:45:00,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885552264] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:45:00,691 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:45:00,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 4] total 19 [2023-11-06 22:45:00,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239847057] [2023-11-06 22:45:00,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:45:00,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-06 22:45:00,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:45:00,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-06 22:45:00,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2023-11-06 22:45:02,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 329 [2023-11-06 22:45:02,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 466 transitions, 10228 flow. Second operand has 21 states, 21 states have (on average 125.57142857142857) internal successors, (2637), 21 states have internal predecessors, (2637), 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) [2023-11-06 22:45:02,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:45:02,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 329 [2023-11-06 22:45:02,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:45:04,377 INFO L124 PetriNetUnfolderBase]: 2087/3487 cut-off events. [2023-11-06 22:45:04,377 INFO L125 PetriNetUnfolderBase]: For 88218/88228 co-relation queries the response was YES. [2023-11-06 22:45:04,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36438 conditions, 3487 events. 2087/3487 cut-off events. For 88218/88228 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 20818 event pairs, 110 based on Foata normal form. 104/3579 useless extension candidates. Maximal degree in co-relation 36355. Up to 1874 conditions per place. [2023-11-06 22:45:04,423 INFO L140 encePairwiseOnDemand]: 319/329 looper letters, 255 selfloop transitions, 342 changer transitions 7/605 dead transitions. [2023-11-06 22:45:04,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 605 transitions, 13812 flow [2023-11-06 22:45:04,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-06 22:45:04,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-06 22:45:04,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2472 transitions. [2023-11-06 22:45:04,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3954567269236922 [2023-11-06 22:45:04,427 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2472 transitions. [2023-11-06 22:45:04,427 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2472 transitions. [2023-11-06 22:45:04,428 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:45:04,428 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2472 transitions. [2023-11-06 22:45:04,431 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 130.10526315789474) internal successors, (2472), 19 states have internal predecessors, (2472), 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) [2023-11-06 22:45:04,436 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 329.0) internal successors, (6580), 20 states have internal predecessors, (6580), 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) [2023-11-06 22:45:04,437 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 329.0) internal successors, (6580), 20 states have internal predecessors, (6580), 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) [2023-11-06 22:45:04,437 INFO L175 Difference]: Start difference. First operand has 281 places, 466 transitions, 10228 flow. Second operand 19 states and 2472 transitions. [2023-11-06 22:45:04,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 605 transitions, 13812 flow [2023-11-06 22:45:05,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 605 transitions, 12198 flow, removed 745 selfloop flow, removed 11 redundant places. [2023-11-06 22:45:05,315 INFO L231 Difference]: Finished difference. Result has 242 places, 482 transitions, 10458 flow [2023-11-06 22:45:05,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=329, PETRI_DIFFERENCE_MINUEND_FLOW=9105, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=326, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=10458, PETRI_PLACES=242, PETRI_TRANSITIONS=482} [2023-11-06 22:45:05,316 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 211 predicate places. [2023-11-06 22:45:05,316 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 482 transitions, 10458 flow [2023-11-06 22:45:05,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 125.57142857142857) internal successors, (2637), 21 states have internal predecessors, (2637), 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) [2023-11-06 22:45:05,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:45:05,317 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:45:05,321 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2023-11-06 22:45:05,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:45:05,517 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-06 22:45:05,518 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:45:05,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1097410412, now seen corresponding path program 7 times [2023-11-06 22:45:05,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:45:05,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331179169] [2023-11-06 22:45:05,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:45:05,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:45:05,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:45:06,528 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:45:06,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:45:06,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331179169] [2023-11-06 22:45:06,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331179169] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:45:06,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603178199] [2023-11-06 22:45:06,529 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:45:06,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:45:06,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:45:06,530 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:45:06,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-11-06 22:45:06,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:45:06,681 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-06 22:45:06,682 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:45:06,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:45:06,894 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2023-11-06 22:45:06,960 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:45:06,960 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:45:07,089 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:45:07,089 INFO L351 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 48 treesize of output 41 [2023-11-06 22:45:07,100 INFO L351 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 10 treesize of output 3 [2023-11-06 22:45:07,245 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-06 22:45:07,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603178199] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:45:07,245 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:45:07,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 6] total 25 [2023-11-06 22:45:07,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419201308] [2023-11-06 22:45:07,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:45:07,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-06 22:45:07,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:45:07,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-06 22:45:07,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=622, Unknown=2, NotChecked=0, Total=702 [2023-11-06 22:45:07,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 329 [2023-11-06 22:45:07,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 482 transitions, 10458 flow. Second operand has 27 states, 27 states have (on average 104.44444444444444) internal successors, (2820), 27 states have internal predecessors, (2820), 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) [2023-11-06 22:45:07,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:45:07,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 329 [2023-11-06 22:45:07,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:45:09,988 INFO L124 PetriNetUnfolderBase]: 2054/3453 cut-off events. [2023-11-06 22:45:09,988 INFO L125 PetriNetUnfolderBase]: For 67634/67644 co-relation queries the response was YES. [2023-11-06 22:45:10,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32478 conditions, 3453 events. 2054/3453 cut-off events. For 67634/67644 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 20643 event pairs, 126 based on Foata normal form. 62/3505 useless extension candidates. Maximal degree in co-relation 32395. Up to 1109 conditions per place. [2023-11-06 22:45:10,032 INFO L140 encePairwiseOnDemand]: 320/329 looper letters, 239 selfloop transitions, 315 changer transitions 18/573 dead transitions. [2023-11-06 22:45:10,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 573 transitions, 12647 flow [2023-11-06 22:45:10,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-06 22:45:10,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-06 22:45:10,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2062 transitions. [2023-11-06 22:45:10,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3298672212446009 [2023-11-06 22:45:10,035 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2062 transitions. [2023-11-06 22:45:10,035 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2062 transitions. [2023-11-06 22:45:10,035 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:45:10,035 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2062 transitions. [2023-11-06 22:45:10,037 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 108.52631578947368) internal successors, (2062), 19 states have internal predecessors, (2062), 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) [2023-11-06 22:45:10,040 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 329.0) internal successors, (6580), 20 states have internal predecessors, (6580), 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) [2023-11-06 22:45:10,041 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 329.0) internal successors, (6580), 20 states have internal predecessors, (6580), 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) [2023-11-06 22:45:10,041 INFO L175 Difference]: Start difference. First operand has 242 places, 482 transitions, 10458 flow. Second operand 19 states and 2062 transitions. [2023-11-06 22:45:10,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 573 transitions, 12647 flow [2023-11-06 22:45:10,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 573 transitions, 12183 flow, removed 91 selfloop flow, removed 14 redundant places. [2023-11-06 22:45:10,529 INFO L231 Difference]: Finished difference. Result has 246 places, 464 transitions, 10226 flow [2023-11-06 22:45:10,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=329, PETRI_DIFFERENCE_MINUEND_FLOW=9842, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=312, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=10226, PETRI_PLACES=246, PETRI_TRANSITIONS=464} [2023-11-06 22:45:10,530 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 215 predicate places. [2023-11-06 22:45:10,530 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 464 transitions, 10226 flow [2023-11-06 22:45:10,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 104.44444444444444) internal successors, (2820), 27 states have internal predecessors, (2820), 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) [2023-11-06 22:45:10,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:45:10,531 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:45:10,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-11-06 22:45:10,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2023-11-06 22:45:10,732 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-06 22:45:10,732 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:45:10,732 INFO L85 PathProgramCache]: Analyzing trace with hash 764351410, now seen corresponding path program 3 times [2023-11-06 22:45:10,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:45:10,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626298230] [2023-11-06 22:45:10,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:45:10,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:45:10,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:45:11,275 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:45:11,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:45:11,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626298230] [2023-11-06 22:45:11,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626298230] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:45:11,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231341690] [2023-11-06 22:45:11,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:45:11,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:45:11,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:45:11,277 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:45:11,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-11-06 22:45:11,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 22:45:11,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:45:11,456 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 22:45:11,456 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:45:11,546 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:45:11,546 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:45:11,583 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:45:11,584 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2023-11-06 22:45:11,609 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:45:11,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231341690] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:45:11,610 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:45:11,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4, 4] total 13 [2023-11-06 22:45:11,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173335159] [2023-11-06 22:45:11,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:45:11,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 22:45:11,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:45:11,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 22:45:11,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:45:12,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 329 [2023-11-06 22:45:12,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 464 transitions, 10226 flow. Second operand has 15 states, 15 states have (on average 126.73333333333333) internal successors, (1901), 15 states have internal predecessors, (1901), 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) [2023-11-06 22:45:12,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:45:12,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 329 [2023-11-06 22:45:12,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:45:13,821 INFO L124 PetriNetUnfolderBase]: 1986/3314 cut-off events. [2023-11-06 22:45:13,821 INFO L125 PetriNetUnfolderBase]: For 66137/66147 co-relation queries the response was YES. [2023-11-06 22:45:13,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31720 conditions, 3314 events. 1986/3314 cut-off events. For 66137/66147 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 19450 event pairs, 227 based on Foata normal form. 32/3344 useless extension candidates. Maximal degree in co-relation 31643. Up to 2692 conditions per place. [2023-11-06 22:45:13,861 INFO L140 encePairwiseOnDemand]: 319/329 looper letters, 307 selfloop transitions, 181 changer transitions 11/500 dead transitions. [2023-11-06 22:45:13,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 500 transitions, 11494 flow [2023-11-06 22:45:13,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-06 22:45:13,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-06 22:45:13,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2209 transitions. [2023-11-06 22:45:13,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3949579831932773 [2023-11-06 22:45:13,864 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2209 transitions. [2023-11-06 22:45:13,864 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2209 transitions. [2023-11-06 22:45:13,864 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:45:13,864 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2209 transitions. [2023-11-06 22:45:13,866 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 129.94117647058823) internal successors, (2209), 17 states have internal predecessors, (2209), 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) [2023-11-06 22:45:13,869 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 329.0) internal successors, (5922), 18 states have internal predecessors, (5922), 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) [2023-11-06 22:45:13,869 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 329.0) internal successors, (5922), 18 states have internal predecessors, (5922), 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) [2023-11-06 22:45:13,870 INFO L175 Difference]: Start difference. First operand has 246 places, 464 transitions, 10226 flow. Second operand 17 states and 2209 transitions. [2023-11-06 22:45:13,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 500 transitions, 11494 flow [2023-11-06 22:45:14,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 500 transitions, 11005 flow, removed 32 selfloop flow, removed 18 redundant places. [2023-11-06 22:45:14,339 INFO L231 Difference]: Finished difference. Result has 239 places, 458 transitions, 10017 flow [2023-11-06 22:45:14,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=329, PETRI_DIFFERENCE_MINUEND_FLOW=9649, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=10017, PETRI_PLACES=239, PETRI_TRANSITIONS=458} [2023-11-06 22:45:14,340 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 208 predicate places. [2023-11-06 22:45:14,340 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 458 transitions, 10017 flow [2023-11-06 22:45:14,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 126.73333333333333) internal successors, (1901), 15 states have internal predecessors, (1901), 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) [2023-11-06 22:45:14,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:45:14,341 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:45:14,351 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2023-11-06 22:45:14,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2023-11-06 22:45:14,546 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-06 22:45:14,546 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:45:14,547 INFO L85 PathProgramCache]: Analyzing trace with hash 764352519, now seen corresponding path program 9 times [2023-11-06 22:45:14,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:45:14,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769358757] [2023-11-06 22:45:14,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:45:14,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:45:14,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:45:15,686 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:45:15,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:45:15,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769358757] [2023-11-06 22:45:15,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769358757] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:45:15,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929661750] [2023-11-06 22:45:15,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:45:15,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:45:15,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:45:15,687 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:45:15,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-11-06 22:45:15,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 22:45:15,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:45:15,885 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-06 22:45:15,886 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:45:16,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:45:16,023 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-06 22:45:16,198 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:45:16,198 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:45:16,474 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:45:16,474 INFO L351 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 96 treesize of output 98 [2023-11-06 22:45:16,494 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:45:16,495 INFO L351 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 48 treesize of output 46 [2023-11-06 22:45:16,750 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:45:16,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929661750] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:45:16,751 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:45:16,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 24 [2023-11-06 22:45:16,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611713562] [2023-11-06 22:45:16,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:45:16,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-06 22:45:16,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:45:16,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-06 22:45:16,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=572, Unknown=4, NotChecked=0, Total=650 [2023-11-06 22:45:17,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 329 [2023-11-06 22:45:17,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 458 transitions, 10017 flow. Second operand has 26 states, 26 states have (on average 104.34615384615384) internal successors, (2713), 26 states have internal predecessors, (2713), 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) [2023-11-06 22:45:17,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:45:17,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 329 [2023-11-06 22:45:17,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:45:20,369 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:45:22,413 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:45:23,309 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse6 (* c_~q_front~0 4))) (let ((.cse5 (select |c_#memory_int| c_~q~0.base)) (.cse2 (+ .cse6 c_~q~0.offset))) (let ((.cse3 (+ c_~q~0.offset (* 4 c_~q_back~0))) (.cse4 (select .cse5 .cse2)) (.cse1 (+ .cse6 c_~q~0.offset 4))) (and (forall ((v_ArrVal_1225 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1225) c_~q~0.base))) (or (< (+ (select .cse0 .cse1) (select .cse0 .cse2)) 2147483648) (not (= (select .cse0 .cse3) 1))))) (< (+ c_~s~0 .cse4) 2147483648) (or (not (= (select .cse5 .cse3) 1)) (< (+ .cse4 (select .cse5 .cse1)) 2147483648)))))) is different from false [2023-11-06 22:45:26,299 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:45:27,152 INFO L124 PetriNetUnfolderBase]: 2416/4036 cut-off events. [2023-11-06 22:45:27,152 INFO L125 PetriNetUnfolderBase]: For 83275/83285 co-relation queries the response was YES. [2023-11-06 22:45:27,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37775 conditions, 4036 events. 2416/4036 cut-off events. For 83275/83285 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 24451 event pairs, 105 based on Foata normal form. 84/4120 useless extension candidates. Maximal degree in co-relation 37703. Up to 2117 conditions per place. [2023-11-06 22:45:27,197 INFO L140 encePairwiseOnDemand]: 319/329 looper letters, 285 selfloop transitions, 465 changer transitions 0/751 dead transitions. [2023-11-06 22:45:27,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 751 transitions, 16409 flow [2023-11-06 22:45:27,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-06 22:45:27,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-11-06 22:45:27,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 4314 transitions. [2023-11-06 22:45:27,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32781155015197566 [2023-11-06 22:45:27,203 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 4314 transitions. [2023-11-06 22:45:27,203 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 4314 transitions. [2023-11-06 22:45:27,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:45:27,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 4314 transitions. [2023-11-06 22:45:27,207 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 107.85) internal successors, (4314), 40 states have internal predecessors, (4314), 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) [2023-11-06 22:45:27,213 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 329.0) internal successors, (13489), 41 states have internal predecessors, (13489), 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) [2023-11-06 22:45:27,215 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 329.0) internal successors, (13489), 41 states have internal predecessors, (13489), 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) [2023-11-06 22:45:27,215 INFO L175 Difference]: Start difference. First operand has 239 places, 458 transitions, 10017 flow. Second operand 40 states and 4314 transitions. [2023-11-06 22:45:27,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 751 transitions, 16409 flow [2023-11-06 22:45:27,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 751 transitions, 16139 flow, removed 1 selfloop flow, removed 10 redundant places. [2023-11-06 22:45:27,687 INFO L231 Difference]: Finished difference. Result has 279 places, 668 transitions, 15645 flow [2023-11-06 22:45:27,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=329, PETRI_DIFFERENCE_MINUEND_FLOW=9704, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=293, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=15645, PETRI_PLACES=279, PETRI_TRANSITIONS=668} [2023-11-06 22:45:27,689 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 248 predicate places. [2023-11-06 22:45:27,689 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 668 transitions, 15645 flow [2023-11-06 22:45:27,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 104.34615384615384) internal successors, (2713), 26 states have internal predecessors, (2713), 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) [2023-11-06 22:45:27,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:45:27,690 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:45:27,695 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2023-11-06 22:45:27,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:45:27,895 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-06 22:45:27,896 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:45:27,896 INFO L85 PathProgramCache]: Analyzing trace with hash 103379808, now seen corresponding path program 3 times [2023-11-06 22:45:27,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:45:27,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075485658] [2023-11-06 22:45:27,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:45:27,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:45:27,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:45:28,359 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:45:28,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:45:28,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075485658] [2023-11-06 22:45:28,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075485658] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:45:28,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094866721] [2023-11-06 22:45:28,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:45:28,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:45:28,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:45:28,361 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:45:28,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5220f215-6623-440d-8cdb-46a5f755200e/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-11-06 22:45:28,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 22:45:28,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:45:28,549 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-06 22:45:28,550 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:45:28,640 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-06 22:45:28,640 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:45:28,694 INFO L322 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-11-06 22:45:28,694 INFO L351 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 13 [2023-11-06 22:45:28,714 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-06 22:45:28,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094866721] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:45:28,715 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:45:28,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 4, 4] total 16 [2023-11-06 22:45:28,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936278413] [2023-11-06 22:45:28,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:45:28,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 22:45:28,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:45:28,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 22:45:28,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306