./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.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_588ca069-85b6-4f5e-a705-30f116c19aa6/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_588ca069-85b6-4f5e-a705-30f116c19aa6/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_588ca069-85b6-4f5e-a705-30f116c19aa6/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_588ca069-85b6-4f5e-a705-30f116c19aa6/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_588ca069-85b6-4f5e-a705-30f116c19aa6/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_588ca069-85b6-4f5e-a705-30f116c19aa6/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 c17307c3ae663be4a153b702602dea6d5ee45f14a080e7a1fb720e97140b770f --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:02:33,413 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:02:33,554 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_588ca069-85b6-4f5e-a705-30f116c19aa6/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-11-06 22:02:33,563 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:02:33,565 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:02:33,615 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:02:33,616 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:02:33,617 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:02:33,618 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:02:33,619 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:02:33,621 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:02:33,622 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:02:33,623 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:02:33,624 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:02:33,625 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:02:33,625 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:02:33,626 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:02:33,627 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:02:33,629 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:02:33,630 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:02:33,631 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:02:33,632 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:02:33,632 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-06 22:02:33,633 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 22:02:33,634 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:02:33,634 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:02:33,635 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:02:33,636 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:02:33,637 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:02:33,638 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:02:33,640 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:02:33,640 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:02:33,641 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:02:33,641 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:02:33,641 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:02:33,642 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:02:33,642 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:02:33,654 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:02:33,655 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:02:33,655 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:02:33,655 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:02:33,656 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_588ca069-85b6-4f5e-a705-30f116c19aa6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_588ca069-85b6-4f5e-a705-30f116c19aa6/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c17307c3ae663be4a153b702602dea6d5ee45f14a080e7a1fb720e97140b770f [2023-11-06 22:02:33,984 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:02:34,031 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:02:34,040 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:02:34,041 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:02:34,041 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:02:34,043 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_588ca069-85b6-4f5e-a705-30f116c19aa6/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c [2023-11-06 22:02:37,162 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:02:37,415 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:02:37,416 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_588ca069-85b6-4f5e-a705-30f116c19aa6/sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c [2023-11-06 22:02:37,430 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_588ca069-85b6-4f5e-a705-30f116c19aa6/bin/uautomizer-verify-WvqO1wxjHP/data/8fd370cec/0c5fe49d6d354b078f2fa00a80763b91/FLAGd5f0ac55e [2023-11-06 22:02:37,451 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_588ca069-85b6-4f5e-a705-30f116c19aa6/bin/uautomizer-verify-WvqO1wxjHP/data/8fd370cec/0c5fe49d6d354b078f2fa00a80763b91 [2023-11-06 22:02:37,476 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:02:37,482 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:02:37,484 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:02:37,484 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:02:37,490 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:02:37,491 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:02:37" (1/1) ... [2023-11-06 22:02:37,492 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4517e236 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:37, skipping insertion in model container [2023-11-06 22:02:37,492 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:02:37" (1/1) ... [2023-11-06 22:02:37,525 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:02:37,735 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:02:37,747 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:02:37,771 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:02:37,782 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:02:37,782 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:02:37,791 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:02:37,792 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:37 WrapperNode [2023-11-06 22:02:37,792 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:02:37,794 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:02:37,794 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:02:37,794 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:02:37,804 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:37" (1/1) ... [2023-11-06 22:02:37,814 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:37" (1/1) ... [2023-11-06 22:02:37,839 INFO L138 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 55 [2023-11-06 22:02:37,839 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:02:37,840 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:02:37,840 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:02:37,841 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:02:37,850 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:37" (1/1) ... [2023-11-06 22:02:37,851 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:37" (1/1) ... [2023-11-06 22:02:37,853 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:37" (1/1) ... [2023-11-06 22:02:37,854 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:37" (1/1) ... [2023-11-06 22:02:37,860 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:37" (1/1) ... [2023-11-06 22:02:37,864 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:37" (1/1) ... [2023-11-06 22:02:37,866 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:37" (1/1) ... [2023-11-06 22:02:37,867 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:37" (1/1) ... [2023-11-06 22:02:37,870 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:02:37,871 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:02:37,871 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:02:37,871 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:02:37,873 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:37" (1/1) ... [2023-11-06 22:02:37,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:02:37,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_588ca069-85b6-4f5e-a705-30f116c19aa6/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:02:37,920 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_588ca069-85b6-4f5e-a705-30f116c19aa6/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:02:37,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_588ca069-85b6-4f5e-a705-30f116c19aa6/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:02:37,974 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:02:37,974 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 22:02:37,974 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 22:02:37,975 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 22:02:37,975 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 22:02:37,975 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:02:37,975 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:02:37,976 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:02:37,976 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-06 22:02:37,976 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-06 22:02:37,976 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:02:37,977 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:02:37,979 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:02:37,979 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:02:37,981 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 22:02:38,136 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:02:38,139 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:02:38,510 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:02:38,623 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:02:38,623 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-06 22:02:38,626 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:02:38 BoogieIcfgContainer [2023-11-06 22:02:38,626 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:02:38,629 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:02:38,629 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:02:38,633 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:02:38,633 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:02:37" (1/3) ... [2023-11-06 22:02:38,634 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@367c9cc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:02:38, skipping insertion in model container [2023-11-06 22:02:38,634 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:37" (2/3) ... [2023-11-06 22:02:38,635 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@367c9cc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:02:38, skipping insertion in model container [2023-11-06 22:02:38,635 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:02:38" (3/3) ... [2023-11-06 22:02:38,637 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr.wvr.c [2023-11-06 22:02:38,648 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 22:02:38,661 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:02:38,662 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2023-11-06 22:02:38,662 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:02:38,764 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-06 22:02:38,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 93 places, 92 transitions, 198 flow [2023-11-06 22:02:38,931 INFO L124 PetriNetUnfolderBase]: 6/90 cut-off events. [2023-11-06 22:02:38,933 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:02:38,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 90 events. 6/90 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 97 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 52. Up to 2 conditions per place. [2023-11-06 22:02:38,941 INFO L82 GeneralOperation]: Start removeDead. Operand has 93 places, 92 transitions, 198 flow [2023-11-06 22:02:38,949 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 70 places, 68 transitions, 145 flow [2023-11-06 22:02:38,954 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:02:38,977 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 70 places, 68 transitions, 145 flow [2023-11-06 22:02:38,982 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 70 places, 68 transitions, 145 flow [2023-11-06 22:02:38,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 70 places, 68 transitions, 145 flow [2023-11-06 22:02:39,038 INFO L124 PetriNetUnfolderBase]: 5/68 cut-off events. [2023-11-06 22:02:39,039 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 22:02:39,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76 conditions, 68 events. 5/68 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 93 event pairs, 0 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 52. Up to 2 conditions per place. [2023-11-06 22:02:39,043 INFO L119 LiptonReduction]: Number of co-enabled transitions 812 [2023-11-06 22:02:41,972 INFO L134 LiptonReduction]: Checked pairs total: 779 [2023-11-06 22:02:41,972 INFO L136 LiptonReduction]: Total number of compositions: 63 [2023-11-06 22:02:41,990 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:02:41,997 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;@4ae35003, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:02:41,998 INFO L358 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2023-11-06 22:02:42,001 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:02:42,001 INFO L124 PetriNetUnfolderBase]: 1/5 cut-off events. [2023-11-06 22:02:42,001 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:02:42,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:02:42,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-06 22:02:42,003 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-06 22:02:42,008 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:02:42,009 INFO L85 PathProgramCache]: Analyzing trace with hash 11630508, now seen corresponding path program 1 times [2023-11-06 22:02:42,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:02:42,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640896392] [2023-11-06 22:02:42,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:42,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:02:42,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:02:42,285 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 22:02:42,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:02:42,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640896392] [2023-11-06 22:02:42,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640896392] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:02:42,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:02:42,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:02:42,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396226936] [2023-11-06 22:02:42,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:02:42,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:02:42,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:02:42,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:02:42,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:02:42,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 155 [2023-11-06 22:02:42,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 21 transitions, 51 flow. Second operand has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 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 22:02:42,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:02:42,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 155 [2023-11-06 22:02:42,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:02:42,544 INFO L124 PetriNetUnfolderBase]: 231/351 cut-off events. [2023-11-06 22:02:42,549 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2023-11-06 22:02:42,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 730 conditions, 351 events. 231/351 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 1316 event pairs, 39 based on Foata normal form. 0/138 useless extension candidates. Maximal degree in co-relation 619. Up to 306 conditions per place. [2023-11-06 22:02:42,557 INFO L140 encePairwiseOnDemand]: 145/155 looper letters, 22 selfloop transitions, 4 changer transitions 3/31 dead transitions. [2023-11-06 22:02:42,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 31 transitions, 135 flow [2023-11-06 22:02:42,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:02:42,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:02:42,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 258 transitions. [2023-11-06 22:02:42,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5548387096774193 [2023-11-06 22:02:42,574 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 258 transitions. [2023-11-06 22:02:42,575 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 258 transitions. [2023-11-06 22:02:42,577 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:02:42,579 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 258 transitions. [2023-11-06 22:02:42,582 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 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 22:02:42,588 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 155.0) internal successors, (620), 4 states have internal predecessors, (620), 0 states have call successors, (0), 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 22:02:42,589 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 155.0) internal successors, (620), 4 states have internal predecessors, (620), 0 states have call successors, (0), 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 22:02:42,591 INFO L175 Difference]: Start difference. First operand has 26 places, 21 transitions, 51 flow. Second operand 3 states and 258 transitions. [2023-11-06 22:02:42,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 31 transitions, 135 flow [2023-11-06 22:02:42,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 31 transitions, 127 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-06 22:02:42,597 INFO L231 Difference]: Finished difference. Result has 25 places, 23 transitions, 78 flow [2023-11-06 22:02:42,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=155, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=25, PETRI_TRANSITIONS=23} [2023-11-06 22:02:42,603 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -1 predicate places. [2023-11-06 22:02:42,604 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 23 transitions, 78 flow [2023-11-06 22:02:42,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 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 22:02:42,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:02:42,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 22:02:42,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:02:42,605 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-06 22:02:42,606 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:02:42,606 INFO L85 PathProgramCache]: Analyzing trace with hash 360547329, now seen corresponding path program 1 times [2023-11-06 22:02:42,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:02:42,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939963783] [2023-11-06 22:02:42,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:42,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:02:42,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:02:42,774 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 22:02:42,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:02:42,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939963783] [2023-11-06 22:02:42,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939963783] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:02:42,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542385936] [2023-11-06 22:02:42,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:42,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:02:42,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_588ca069-85b6-4f5e-a705-30f116c19aa6/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:02:42,780 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_588ca069-85b6-4f5e-a705-30f116c19aa6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:02:42,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_588ca069-85b6-4f5e-a705-30f116c19aa6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:02:42,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:02:42,864 INFO L262 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:02:42,869 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:02:42,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:02:42,939 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:02:42,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542385936] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:02:42,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:02:42,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2023-11-06 22:02:42,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335728583] [2023-11-06 22:02:42,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:02:42,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:02:42,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:02:42,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:02:42,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:02:42,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 155 [2023-11-06 22:02:42,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 23 transitions, 78 flow. Second operand has 4 states, 4 states have (on average 73.25) internal successors, (293), 4 states have internal predecessors, (293), 0 states have call successors, (0), 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 22:02:42,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:02:42,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 155 [2023-11-06 22:02:42,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:02:43,177 INFO L124 PetriNetUnfolderBase]: 206/319 cut-off events. [2023-11-06 22:02:43,178 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-11-06 22:02:43,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 814 conditions, 319 events. 206/319 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 1270 event pairs, 24 based on Foata normal form. 0/186 useless extension candidates. Maximal degree in co-relation 622. Up to 184 conditions per place. [2023-11-06 22:02:43,193 INFO L140 encePairwiseOnDemand]: 150/155 looper letters, 29 selfloop transitions, 4 changer transitions 1/35 dead transitions. [2023-11-06 22:02:43,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 35 transitions, 175 flow [2023-11-06 22:02:43,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:02:43,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:02:43,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 324 transitions. [2023-11-06 22:02:43,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5225806451612903 [2023-11-06 22:02:43,206 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 324 transitions. [2023-11-06 22:02:43,206 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 324 transitions. [2023-11-06 22:02:43,206 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:02:43,207 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 324 transitions. [2023-11-06 22:02:43,208 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 81.0) internal successors, (324), 4 states have internal predecessors, (324), 0 states have call successors, (0), 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 22:02:43,211 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 155.0) internal successors, (775), 5 states have internal predecessors, (775), 0 states have call successors, (0), 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 22:02:43,212 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 155.0) internal successors, (775), 5 states have internal predecessors, (775), 0 states have call successors, (0), 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 22:02:43,212 INFO L175 Difference]: Start difference. First operand has 25 places, 23 transitions, 78 flow. Second operand 4 states and 324 transitions. [2023-11-06 22:02:43,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 35 transitions, 175 flow [2023-11-06 22:02:43,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 35 transitions, 172 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:02:43,214 INFO L231 Difference]: Finished difference. Result has 26 places, 21 transitions, 74 flow [2023-11-06 22:02:43,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=155, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=74, PETRI_PLACES=26, PETRI_TRANSITIONS=21} [2023-11-06 22:02:43,215 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 0 predicate places. [2023-11-06 22:02:43,216 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 21 transitions, 74 flow [2023-11-06 22:02:43,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 73.25) internal successors, (293), 4 states have internal predecessors, (293), 0 states have call successors, (0), 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 22:02:43,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:02:43,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 22:02:43,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_588ca069-85b6-4f5e-a705-30f116c19aa6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:02:43,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_588ca069-85b6-4f5e-a705-30f116c19aa6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:02:43,426 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-06 22:02:43,427 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:02:43,427 INFO L85 PathProgramCache]: Analyzing trace with hash 360547330, now seen corresponding path program 1 times [2023-11-06 22:02:43,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:02:43,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638389024] [2023-11-06 22:02:43,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:43,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:02:43,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:02:43,580 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 22:02:43,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:02:43,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638389024] [2023-11-06 22:02:43,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638389024] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:02:43,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047236403] [2023-11-06 22:02:43,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:43,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:02:43,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_588ca069-85b6-4f5e-a705-30f116c19aa6/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:02:43,583 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_588ca069-85b6-4f5e-a705-30f116c19aa6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:02:43,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_588ca069-85b6-4f5e-a705-30f116c19aa6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:02:43,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:02:43,663 INFO L262 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:02:43,664 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:02:43,678 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 22:02:43,679 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:02:43,706 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 22:02:43,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047236403] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:02:43,707 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:02:43,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-06 22:02:43,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951153051] [2023-11-06 22:02:43,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:02:43,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:02:43,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:02:43,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:02:43,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:02:43,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 155 [2023-11-06 22:02:43,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 21 transitions, 74 flow. Second operand has 7 states, 7 states have (on average 73.42857142857143) internal successors, (514), 7 states have internal predecessors, (514), 0 states have call successors, (0), 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 22:02:43,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:02:43,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 155 [2023-11-06 22:02:43,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:02:43,974 INFO L124 PetriNetUnfolderBase]: 463/688 cut-off events. [2023-11-06 22:02:43,974 INFO L125 PetriNetUnfolderBase]: For 47/47 co-relation queries the response was YES. [2023-11-06 22:02:43,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1841 conditions, 688 events. 463/688 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 3068 event pairs, 48 based on Foata normal form. 0/384 useless extension candidates. Maximal degree in co-relation 1372. Up to 361 conditions per place. [2023-11-06 22:02:43,982 INFO L140 encePairwiseOnDemand]: 151/155 looper letters, 52 selfloop transitions, 8 changer transitions 0/61 dead transitions. [2023-11-06 22:02:43,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 61 transitions, 320 flow [2023-11-06 22:02:43,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:02:43,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:02:43,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 496 transitions. [2023-11-06 22:02:43,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2023-11-06 22:02:43,986 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 496 transitions. [2023-11-06 22:02:43,986 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 496 transitions. [2023-11-06 22:02:43,987 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:02:43,987 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 496 transitions. [2023-11-06 22:02:43,990 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 82.66666666666667) internal successors, (496), 6 states have internal predecessors, (496), 0 states have call successors, (0), 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 22:02:43,996 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 155.0) internal successors, (1085), 7 states have internal predecessors, (1085), 0 states have call successors, (0), 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 22:02:43,997 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 155.0) internal successors, (1085), 7 states have internal predecessors, (1085), 0 states have call successors, (0), 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 22:02:43,997 INFO L175 Difference]: Start difference. First operand has 26 places, 21 transitions, 74 flow. Second operand 6 states and 496 transitions. [2023-11-06 22:02:43,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 61 transitions, 320 flow [2023-11-06 22:02:44,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 61 transitions, 311 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-11-06 22:02:44,003 INFO L231 Difference]: Finished difference. Result has 32 places, 26 transitions, 118 flow [2023-11-06 22:02:44,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=155, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=118, PETRI_PLACES=32, PETRI_TRANSITIONS=26} [2023-11-06 22:02:44,005 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 6 predicate places. [2023-11-06 22:02:44,005 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 26 transitions, 118 flow [2023-11-06 22:02:44,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 73.42857142857143) internal successors, (514), 7 states have internal predecessors, (514), 0 states have call successors, (0), 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 22:02:44,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:02:44,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 22:02:44,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_588ca069-85b6-4f5e-a705-30f116c19aa6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:02:44,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_588ca069-85b6-4f5e-a705-30f116c19aa6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:02:44,217 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-06 22:02:44,217 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:02:44,218 INFO L85 PathProgramCache]: Analyzing trace with hash 360547288, now seen corresponding path program 1 times [2023-11-06 22:02:44,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:02:44,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367393928] [2023-11-06 22:02:44,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:44,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:02:44,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:02:44,338 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 22:02:44,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:02:44,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367393928] [2023-11-06 22:02:44,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367393928] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:02:44,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793333590] [2023-11-06 22:02:44,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:44,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:02:44,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_588ca069-85b6-4f5e-a705-30f116c19aa6/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:02:44,346 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_588ca069-85b6-4f5e-a705-30f116c19aa6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:02:44,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_588ca069-85b6-4f5e-a705-30f116c19aa6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:02:44,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:02:44,421 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:02:44,422 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:02:44,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:02:44,439 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:02:44,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793333590] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:02:44,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:02:44,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 3 [2023-11-06 22:02:44,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541363021] [2023-11-06 22:02:44,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:02:44,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:02:44,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:02:44,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:02:44,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:02:44,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 155 [2023-11-06 22:02:44,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 26 transitions, 118 flow. Second operand has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 0 states have call successors, (0), 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 22:02:44,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:02:44,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 155 [2023-11-06 22:02:44,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:02:44,643 INFO L124 PetriNetUnfolderBase]: 509/754 cut-off events. [2023-11-06 22:02:44,643 INFO L125 PetriNetUnfolderBase]: For 408/408 co-relation queries the response was YES. [2023-11-06 22:02:44,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2289 conditions, 754 events. 509/754 cut-off events. For 408/408 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 3168 event pairs, 61 based on Foata normal form. 0/556 useless extension candidates. Maximal degree in co-relation 2099. Up to 443 conditions per place. [2023-11-06 22:02:44,653 INFO L140 encePairwiseOnDemand]: 146/155 looper letters, 31 selfloop transitions, 12 changer transitions 0/45 dead transitions. [2023-11-06 22:02:44,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 45 transitions, 295 flow [2023-11-06 22:02:44,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:02:44,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:02:44,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 328 transitions. [2023-11-06 22:02:44,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5290322580645161 [2023-11-06 22:02:44,662 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 328 transitions. [2023-11-06 22:02:44,662 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 328 transitions. [2023-11-06 22:02:44,662 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:02:44,662 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 328 transitions. [2023-11-06 22:02:44,664 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 82.0) internal successors, (328), 4 states have internal predecessors, (328), 0 states have call successors, (0), 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 22:02:44,666 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 155.0) internal successors, (775), 5 states have internal predecessors, (775), 0 states have call successors, (0), 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 22:02:44,667 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 155.0) internal successors, (775), 5 states have internal predecessors, (775), 0 states have call successors, (0), 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 22:02:44,667 INFO L175 Difference]: Start difference. First operand has 32 places, 26 transitions, 118 flow. Second operand 4 states and 328 transitions. [2023-11-06 22:02:44,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 45 transitions, 295 flow [2023-11-06 22:02:44,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 45 transitions, 293 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:02:44,675 INFO L231 Difference]: Finished difference. Result has 35 places, 35 transitions, 236 flow [2023-11-06 22:02:44,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=155, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=236, PETRI_PLACES=35, PETRI_TRANSITIONS=35} [2023-11-06 22:02:44,677 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 9 predicate places. [2023-11-06 22:02:44,678 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 35 transitions, 236 flow [2023-11-06 22:02:44,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 0 states have call successors, (0), 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 22:02:44,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:02:44,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 22:02:44,690 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_588ca069-85b6-4f5e-a705-30f116c19aa6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:02:44,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_588ca069-85b6-4f5e-a705-30f116c19aa6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:02:44,885 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-06 22:02:44,885 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:02:44,885 INFO L85 PathProgramCache]: Analyzing trace with hash 360547289, now seen corresponding path program 1 times [2023-11-06 22:02:44,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:02:44,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494976312] [2023-11-06 22:02:44,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:44,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:02:44,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:02:44,954 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 22:02:44,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:02:44,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494976312] [2023-11-06 22:02:44,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494976312] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:02:44,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987143285] [2023-11-06 22:02:44,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:44,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:02:44,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_588ca069-85b6-4f5e-a705-30f116c19aa6/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:02:44,957 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_588ca069-85b6-4f5e-a705-30f116c19aa6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:02:44,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_588ca069-85b6-4f5e-a705-30f116c19aa6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:02:45,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:02:45,045 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:02:45,046 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:02:45,123 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 22:02:45,123 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:02:45,147 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 22:02:45,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987143285] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:02:45,148 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:02:45,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-11-06 22:02:45,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326057196] [2023-11-06 22:02:45,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:02:45,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:02:45,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:02:45,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:02:45,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:02:45,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 155 [2023-11-06 22:02:45,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 35 transitions, 236 flow. Second operand has 7 states, 7 states have (on average 75.57142857142857) internal successors, (529), 7 states have internal predecessors, (529), 0 states have call successors, (0), 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 22:02:45,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:02:45,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 155 [2023-11-06 22:02:45,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:02:45,475 INFO L124 PetriNetUnfolderBase]: 687/1073 cut-off events. [2023-11-06 22:02:45,475 INFO L125 PetriNetUnfolderBase]: For 1727/1727 co-relation queries the response was YES. [2023-11-06 22:02:45,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4218 conditions, 1073 events. 687/1073 cut-off events. For 1727/1727 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 4707 event pairs, 53 based on Foata normal form. 222/1201 useless extension candidates. Maximal degree in co-relation 4026. Up to 462 conditions per place. [2023-11-06 22:02:45,488 INFO L140 encePairwiseOnDemand]: 147/155 looper letters, 69 selfloop transitions, 34 changer transitions 6/111 dead transitions. [2023-11-06 22:02:45,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 111 transitions, 910 flow [2023-11-06 22:02:45,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:02:45,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 22:02:45,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 599 transitions. [2023-11-06 22:02:45,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.552073732718894 [2023-11-06 22:02:45,492 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 599 transitions. [2023-11-06 22:02:45,492 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 599 transitions. [2023-11-06 22:02:45,493 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:02:45,493 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 599 transitions. [2023-11-06 22:02:45,497 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 85.57142857142857) internal successors, (599), 7 states have internal predecessors, (599), 0 states have call successors, (0), 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 22:02:45,500 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 155.0) internal successors, (1240), 8 states have internal predecessors, (1240), 0 states have call successors, (0), 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 22:02:45,500 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 155.0) internal successors, (1240), 8 states have internal predecessors, (1240), 0 states have call successors, (0), 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 22:02:45,500 INFO L175 Difference]: Start difference. First operand has 35 places, 35 transitions, 236 flow. Second operand 7 states and 599 transitions. [2023-11-06 22:02:45,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 111 transitions, 910 flow [2023-11-06 22:02:45,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 111 transitions, 833 flow, removed 38 selfloop flow, removed 1 redundant places. [2023-11-06 22:02:45,513 INFO L231 Difference]: Finished difference. Result has 45 places, 61 transitions, 603 flow [2023-11-06 22:02:45,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=155, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=603, PETRI_PLACES=45, PETRI_TRANSITIONS=61} [2023-11-06 22:02:45,516 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 19 predicate places. [2023-11-06 22:02:45,516 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 61 transitions, 603 flow [2023-11-06 22:02:45,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 75.57142857142857) internal successors, (529), 7 states have internal predecessors, (529), 0 states have call successors, (0), 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 22:02:45,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:02:45,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:02:45,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_588ca069-85b6-4f5e-a705-30f116c19aa6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:02:45,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_588ca069-85b6-4f5e-a705-30f116c19aa6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:02:45,723 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-06 22:02:45,724 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:02:45,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1675866397, now seen corresponding path program 1 times [2023-11-06 22:02:45,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:02:45,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706201102] [2023-11-06 22:02:45,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:45,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:02:45,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:02:45,837 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 22:02:45,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:02:45,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706201102] [2023-11-06 22:02:45,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706201102] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:02:45,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:02:45,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:02:45,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042763358] [2023-11-06 22:02:45,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:02:45,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:02:45,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:02:45,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:02:45,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:02:45,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 155 [2023-11-06 22:02:45,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 61 transitions, 603 flow. Second operand has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 0 states have call successors, (0), 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 22:02:45,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:02:45,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 155 [2023-11-06 22:02:45,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:02:46,088 INFO L124 PetriNetUnfolderBase]: 702/1160 cut-off events. [2023-11-06 22:02:46,088 INFO L125 PetriNetUnfolderBase]: For 2972/2972 co-relation queries the response was YES. [2023-11-06 22:02:46,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5018 conditions, 1160 events. 702/1160 cut-off events. For 2972/2972 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 5487 event pairs, 270 based on Foata normal form. 6/1066 useless extension candidates. Maximal degree in co-relation 3287. Up to 994 conditions per place. [2023-11-06 22:02:46,104 INFO L140 encePairwiseOnDemand]: 151/155 looper letters, 74 selfloop transitions, 5 changer transitions 1/81 dead transitions. [2023-11-06 22:02:46,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 81 transitions, 910 flow [2023-11-06 22:02:46,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:02:46,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:02:46,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 251 transitions. [2023-11-06 22:02:46,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5397849462365591 [2023-11-06 22:02:46,107 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 251 transitions. [2023-11-06 22:02:46,107 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 251 transitions. [2023-11-06 22:02:46,108 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:02:46,108 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 251 transitions. [2023-11-06 22:02:46,109 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 0 states have call successors, (0), 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 22:02:46,110 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 155.0) internal successors, (620), 4 states have internal predecessors, (620), 0 states have call successors, (0), 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 22:02:46,111 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 155.0) internal successors, (620), 4 states have internal predecessors, (620), 0 states have call successors, (0), 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 22:02:46,111 INFO L175 Difference]: Start difference. First operand has 45 places, 61 transitions, 603 flow. Second operand 3 states and 251 transitions. [2023-11-06 22:02:46,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 81 transitions, 910 flow [2023-11-06 22:02:46,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 81 transitions, 852 flow, removed 29 selfloop flow, removed 0 redundant places. [2023-11-06 22:02:46,137 INFO L231 Difference]: Finished difference. Result has 48 places, 65 transitions, 624 flow [2023-11-06 22:02:46,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=155, PETRI_DIFFERENCE_MINUEND_FLOW=555, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=624, PETRI_PLACES=48, PETRI_TRANSITIONS=65} [2023-11-06 22:02:46,138 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 22 predicate places. [2023-11-06 22:02:46,138 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 65 transitions, 624 flow [2023-11-06 22:02:46,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 0 states have call successors, (0), 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 22:02:46,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:02:46,139 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2023-11-06 22:02:46,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 22:02:46,139 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-06 22:02:46,140 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:02:46,140 INFO L85 PathProgramCache]: Analyzing trace with hash -647421226, now seen corresponding path program 2 times [2023-11-06 22:02:46,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:02:46,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606611034] [2023-11-06 22:02:46,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:46,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:02:46,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:02:46,226 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 22:02:46,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:02:46,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606611034] [2023-11-06 22:02:46,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606611034] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:02:46,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853410402] [2023-11-06 22:02:46,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:02:46,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:02:46,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_588ca069-85b6-4f5e-a705-30f116c19aa6/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:02:46,234 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_588ca069-85b6-4f5e-a705-30f116c19aa6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:02:46,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_588ca069-85b6-4f5e-a705-30f116c19aa6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:02:46,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 22:02:46,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:02:46,301 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:02:46,302 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:02:46,320 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 22:02:46,320 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:02:46,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853410402] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:02:46,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:02:46,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [6] total 7 [2023-11-06 22:02:46,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640374432] [2023-11-06 22:02:46,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:02:46,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:02:46,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:02:46,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:02:46,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:02:46,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 155 [2023-11-06 22:02:46,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 65 transitions, 624 flow. Second operand has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:02:46,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:02:46,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 155 [2023-11-06 22:02:46,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:02:46,466 INFO L124 PetriNetUnfolderBase]: 466/766 cut-off events. [2023-11-06 22:02:46,466 INFO L125 PetriNetUnfolderBase]: For 2642/2675 co-relation queries the response was YES. [2023-11-06 22:02:46,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3246 conditions, 766 events. 466/766 cut-off events. For 2642/2675 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 3388 event pairs, 236 based on Foata normal form. 78/811 useless extension candidates. Maximal degree in co-relation 2177. Up to 763 conditions per place. [2023-11-06 22:02:46,475 INFO L140 encePairwiseOnDemand]: 152/155 looper letters, 50 selfloop transitions, 1 changer transitions 0/53 dead transitions. [2023-11-06 22:02:46,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 53 transitions, 585 flow [2023-11-06 22:02:46,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:02:46,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:02:46,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 235 transitions. [2023-11-06 22:02:46,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5053763440860215 [2023-11-06 22:02:46,477 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 235 transitions. [2023-11-06 22:02:46,477 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 235 transitions. [2023-11-06 22:02:46,478 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:02:46,478 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 235 transitions. [2023-11-06 22:02:46,479 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 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 22:02:46,480 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 155.0) internal successors, (620), 4 states have internal predecessors, (620), 0 states have call successors, (0), 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 22:02:46,480 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 155.0) internal successors, (620), 4 states have internal predecessors, (620), 0 states have call successors, (0), 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 22:02:46,481 INFO L175 Difference]: Start difference. First operand has 48 places, 65 transitions, 624 flow. Second operand 3 states and 235 transitions. [2023-11-06 22:02:46,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 53 transitions, 585 flow [2023-11-06 22:02:46,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 53 transitions, 554 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-06 22:02:46,502 INFO L231 Difference]: Finished difference. Result has 44 places, 53 transitions, 454 flow [2023-11-06 22:02:46,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=155, PETRI_DIFFERENCE_MINUEND_FLOW=452, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=454, PETRI_PLACES=44, PETRI_TRANSITIONS=53} [2023-11-06 22:02:46,503 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 18 predicate places. [2023-11-06 22:02:46,503 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 53 transitions, 454 flow [2023-11-06 22:02:46,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:02:46,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:02:46,504 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2023-11-06 22:02:46,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_588ca069-85b6-4f5e-a705-30f116c19aa6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:02:46,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_588ca069-85b6-4f5e-a705-30f116c19aa6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:02:46,710 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-06 22:02:46,710 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:02:46,711 INFO L85 PathProgramCache]: Analyzing trace with hash -647421267, now seen corresponding path program 2 times [2023-11-06 22:02:46,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:02:46,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854193666] [2023-11-06 22:02:46,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:46,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:02:46,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:02:46,807 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 22:02:46,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:02:46,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854193666] [2023-11-06 22:02:46,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854193666] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:02:46,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931750385] [2023-11-06 22:02:46,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:02:46,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:02:46,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_588ca069-85b6-4f5e-a705-30f116c19aa6/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:02:46,810 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_588ca069-85b6-4f5e-a705-30f116c19aa6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:02:46,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_588ca069-85b6-4f5e-a705-30f116c19aa6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:02:46,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:02:46,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:02:46,880 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 22:02:46,882 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:02:46,907 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 22:02:46,907 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:02:46,990 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 22:02:46,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931750385] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:02:46,991 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:02:46,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-06 22:02:46,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090353176] [2023-11-06 22:02:46,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:02:46,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 22:02:46,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:02:46,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 22:02:46,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:02:47,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 155 [2023-11-06 22:02:47,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 53 transitions, 454 flow. Second operand has 13 states, 13 states have (on average 75.3076923076923) internal successors, (979), 13 states have internal predecessors, (979), 0 states have call successors, (0), 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 22:02:47,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:02:47,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 155 [2023-11-06 22:02:47,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:02:47,529 INFO L124 PetriNetUnfolderBase]: 1146/1947 cut-off events. [2023-11-06 22:02:47,529 INFO L125 PetriNetUnfolderBase]: For 7472/7540 co-relation queries the response was YES. [2023-11-06 22:02:47,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7522 conditions, 1947 events. 1146/1947 cut-off events. For 7472/7540 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 10515 event pairs, 80 based on Foata normal form. 360/2209 useless extension candidates. Maximal degree in co-relation 7503. Up to 595 conditions per place. [2023-11-06 22:02:47,552 INFO L140 encePairwiseOnDemand]: 149/155 looper letters, 108 selfloop transitions, 96 changer transitions 6/212 dead transitions. [2023-11-06 22:02:47,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 212 transitions, 1897 flow [2023-11-06 22:02:47,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 22:02:47,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-06 22:02:47,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1104 transitions. [2023-11-06 22:02:47,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5478908188585608 [2023-11-06 22:02:47,557 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1104 transitions. [2023-11-06 22:02:47,557 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1104 transitions. [2023-11-06 22:02:47,559 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:02:47,559 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1104 transitions. [2023-11-06 22:02:47,563 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 84.92307692307692) internal successors, (1104), 13 states have internal predecessors, (1104), 0 states have call successors, (0), 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 22:02:47,567 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 155.0) internal successors, (2170), 14 states have internal predecessors, (2170), 0 states have call successors, (0), 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 22:02:47,568 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 155.0) internal successors, (2170), 14 states have internal predecessors, (2170), 0 states have call successors, (0), 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 22:02:47,569 INFO L175 Difference]: Start difference. First operand has 44 places, 53 transitions, 454 flow. Second operand 13 states and 1104 transitions. [2023-11-06 22:02:47,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 212 transitions, 1897 flow [2023-11-06 22:02:47,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 212 transitions, 1896 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:02:47,592 INFO L231 Difference]: Finished difference. Result has 66 places, 128 transitions, 1697 flow [2023-11-06 22:02:47,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=155, PETRI_DIFFERENCE_MINUEND_FLOW=453, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1697, PETRI_PLACES=66, PETRI_TRANSITIONS=128} [2023-11-06 22:02:47,593 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 40 predicate places. [2023-11-06 22:02:47,594 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 128 transitions, 1697 flow [2023-11-06 22:02:47,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 75.3076923076923) internal successors, (979), 13 states have internal predecessors, (979), 0 states have call successors, (0), 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 22:02:47,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:02:47,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:02:47,606 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_588ca069-85b6-4f5e-a705-30f116c19aa6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-06 22:02:47,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_588ca069-85b6-4f5e-a705-30f116c19aa6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:02:47,808 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-06 22:02:47,808 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:02:47,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1266017051, now seen corresponding path program 1 times [2023-11-06 22:02:47,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:02:47,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231871792] [2023-11-06 22:02:47,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:47,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:02:47,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:02:47,923 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 22:02:47,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:02:47,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231871792] [2023-11-06 22:02:47,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231871792] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:02:47,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514417329] [2023-11-06 22:02:47,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:47,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:02:47,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_588ca069-85b6-4f5e-a705-30f116c19aa6/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:02:47,926 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_588ca069-85b6-4f5e-a705-30f116c19aa6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:02:47,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_588ca069-85b6-4f5e-a705-30f116c19aa6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:02:47,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:02:47,999 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 22:02:48,001 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:02:48,040 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 22:02:48,041 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:02:48,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:02:48,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514417329] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:02:48,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:02:48,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 9 [2023-11-06 22:02:48,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356917626] [2023-11-06 22:02:48,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:02:48,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:02:48,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:02:48,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:02:48,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:02:48,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 155 [2023-11-06 22:02:48,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 128 transitions, 1697 flow. Second operand has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 0 states have call successors, (0), 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 22:02:48,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:02:48,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 155 [2023-11-06 22:02:48,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:02:48,494 INFO L124 PetriNetUnfolderBase]: 960/1628 cut-off events. [2023-11-06 22:02:48,495 INFO L125 PetriNetUnfolderBase]: For 9027/9027 co-relation queries the response was YES. [2023-11-06 22:02:48,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7258 conditions, 1628 events. 960/1628 cut-off events. For 9027/9027 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8162 event pairs, 174 based on Foata normal form. 94/1722 useless extension candidates. Maximal degree in co-relation 7227. Up to 1450 conditions per place. [2023-11-06 22:02:48,514 INFO L140 encePairwiseOnDemand]: 151/155 looper letters, 110 selfloop transitions, 4 changer transitions 6/121 dead transitions. [2023-11-06 22:02:48,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 121 transitions, 1690 flow [2023-11-06 22:02:48,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:02:48,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:02:48,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 317 transitions. [2023-11-06 22:02:48,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5112903225806451 [2023-11-06 22:02:48,516 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 317 transitions. [2023-11-06 22:02:48,517 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 317 transitions. [2023-11-06 22:02:48,517 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:02:48,517 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 317 transitions. [2023-11-06 22:02:48,518 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 79.25) internal successors, (317), 4 states have internal predecessors, (317), 0 states have call successors, (0), 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 22:02:48,520 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 155.0) internal successors, (775), 5 states have internal predecessors, (775), 0 states have call successors, (0), 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 22:02:48,521 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 155.0) internal successors, (775), 5 states have internal predecessors, (775), 0 states have call successors, (0), 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 22:02:48,521 INFO L175 Difference]: Start difference. First operand has 66 places, 128 transitions, 1697 flow. Second operand 4 states and 317 transitions. [2023-11-06 22:02:48,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 121 transitions, 1690 flow [2023-11-06 22:02:48,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 121 transitions, 1531 flow, removed 72 selfloop flow, removed 4 redundant places. [2023-11-06 22:02:48,567 INFO L231 Difference]: Finished difference. Result has 66 places, 98 transitions, 1156 flow [2023-11-06 22:02:48,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=155, PETRI_DIFFERENCE_MINUEND_FLOW=1117, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1156, PETRI_PLACES=66, PETRI_TRANSITIONS=98} [2023-11-06 22:02:48,568 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 40 predicate places. [2023-11-06 22:02:48,569 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 98 transitions, 1156 flow [2023-11-06 22:02:48,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 0 states have call successors, (0), 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 22:02:48,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:02:48,569 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1] [2023-11-06 22:02:48,575 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_588ca069-85b6-4f5e-a705-30f116c19aa6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:02:48,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_588ca069-85b6-4f5e-a705-30f116c19aa6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:02:48,776 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-06 22:02:48,776 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:02:48,776 INFO L85 PathProgramCache]: Analyzing trace with hash 548885293, now seen corresponding path program 3 times [2023-11-06 22:02:48,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:02:48,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240676858] [2023-11-06 22:02:48,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:48,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:02:48,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:02:49,024 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:02:49,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:02:49,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240676858] [2023-11-06 22:02:49,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240676858] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:02:49,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236880563] [2023-11-06 22:02:49,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:02:49,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:02:49,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_588ca069-85b6-4f5e-a705-30f116c19aa6/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:02:49,027 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_588ca069-85b6-4f5e-a705-30f116c19aa6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:02:49,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_588ca069-85b6-4f5e-a705-30f116c19aa6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:02:49,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-06 22:02:49,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:02:49,110 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 22:02:49,111 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:02:49,155 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:02:49,155 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:02:49,423 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:02:49,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236880563] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:02:49,424 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:02:49,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2023-11-06 22:02:49,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377867829] [2023-11-06 22:02:49,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:02:49,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 22:02:49,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:02:49,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 22:02:49,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-11-06 22:02:49,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 155 [2023-11-06 22:02:49,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 98 transitions, 1156 flow. Second operand has 25 states, 25 states have (on average 75.16) internal successors, (1879), 25 states have internal predecessors, (1879), 0 states have call successors, (0), 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 22:02:49,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:02:49,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 155 [2023-11-06 22:02:49,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:02:50,720 INFO L124 PetriNetUnfolderBase]: 2312/4053 cut-off events. [2023-11-06 22:02:50,720 INFO L125 PetriNetUnfolderBase]: For 60848/60969 co-relation queries the response was YES. [2023-11-06 22:02:50,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15962 conditions, 4053 events. 2312/4053 cut-off events. For 60848/60969 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 23489 event pairs, 167 based on Foata normal form. 699/4752 useless extension candidates. Maximal degree in co-relation 15933. Up to 1151 conditions per place. [2023-11-06 22:02:50,762 INFO L140 encePairwiseOnDemand]: 150/155 looper letters, 117 selfloop transitions, 242 changer transitions 66/428 dead transitions. [2023-11-06 22:02:50,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 428 transitions, 4379 flow [2023-11-06 22:02:50,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-06 22:02:50,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-06 22:02:50,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2109 transitions. [2023-11-06 22:02:50,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.544258064516129 [2023-11-06 22:02:50,771 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2109 transitions. [2023-11-06 22:02:50,771 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2109 transitions. [2023-11-06 22:02:50,773 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:02:50,773 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2109 transitions. [2023-11-06 22:02:50,780 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 84.36) internal successors, (2109), 25 states have internal predecessors, (2109), 0 states have call successors, (0), 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 22:02:50,789 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 155.0) internal successors, (4030), 26 states have internal predecessors, (4030), 0 states have call successors, (0), 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 22:02:50,791 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 155.0) internal successors, (4030), 26 states have internal predecessors, (4030), 0 states have call successors, (0), 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 22:02:50,791 INFO L175 Difference]: Start difference. First operand has 66 places, 98 transitions, 1156 flow. Second operand 25 states and 2109 transitions. [2023-11-06 22:02:50,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 428 transitions, 4379 flow [2023-11-06 22:02:50,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 428 transitions, 4379 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 22:02:50,850 INFO L231 Difference]: Finished difference. Result has 112 places, 272 transitions, 4213 flow [2023-11-06 22:02:50,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=155, PETRI_DIFFERENCE_MINUEND_FLOW=1156, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=4213, PETRI_PLACES=112, PETRI_TRANSITIONS=272} [2023-11-06 22:02:50,851 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 86 predicate places. [2023-11-06 22:02:50,851 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 272 transitions, 4213 flow [2023-11-06 22:02:50,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 75.16) internal successors, (1879), 25 states have internal predecessors, (1879), 0 states have call successors, (0), 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 22:02:50,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:02:50,853 INFO L208 CegarLoopForPetriNet]: trace histogram [22, 1, 1, 1, 1] [2023-11-06 22:02:50,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_588ca069-85b6-4f5e-a705-30f116c19aa6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 22:02:51,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_588ca069-85b6-4f5e-a705-30f116c19aa6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 22:02:51,059 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-06 22:02:51,059 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:02:51,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1757975597, now seen corresponding path program 4 times [2023-11-06 22:02:51,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:02:51,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123763483] [2023-11-06 22:02:51,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:51,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:02:51,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:02:51,751 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:02:51,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:02:51,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123763483] [2023-11-06 22:02:51,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123763483] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:02:51,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662571951] [2023-11-06 22:02:51,751 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:02:51,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:02:51,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_588ca069-85b6-4f5e-a705-30f116c19aa6/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:02:51,754 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_588ca069-85b6-4f5e-a705-30f116c19aa6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:02:51,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_588ca069-85b6-4f5e-a705-30f116c19aa6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 22:02:51,855 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:02:51,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:02:51,857 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-06 22:02:51,859 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:02:51,932 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:02:51,933 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:02:52,882 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:02:52,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662571951] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:02:52,883 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:02:52,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 47 [2023-11-06 22:02:52,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564784312] [2023-11-06 22:02:52,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:02:52,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-11-06 22:02:52,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:02:52,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-11-06 22:02:52,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2023-11-06 22:02:52,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 155 [2023-11-06 22:02:52,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 272 transitions, 4213 flow. Second operand has 49 states, 49 states have (on average 75.08163265306122) internal successors, (3679), 49 states have internal predecessors, (3679), 0 states have call successors, (0), 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 22:02:52,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:02:52,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 155 [2023-11-06 22:02:52,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:02:59,243 INFO L124 PetriNetUnfolderBase]: 7736/13569 cut-off events. [2023-11-06 22:02:59,244 INFO L125 PetriNetUnfolderBase]: For 733420/733685 co-relation queries the response was YES. [2023-11-06 22:02:59,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60296 conditions, 13569 events. 7736/13569 cut-off events. For 733420/733685 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 88258 event pairs, 735 based on Foata normal form. 1491/15060 useless extension candidates. Maximal degree in co-relation 60243. Up to 4005 conditions per place. [2023-11-06 22:02:59,445 INFO L140 encePairwiseOnDemand]: 150/155 looper letters, 215 selfloop transitions, 882 changer transitions 138/1238 dead transitions. [2023-11-06 22:02:59,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 1238 transitions, 16656 flow [2023-11-06 22:02:59,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-11-06 22:02:59,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-11-06 22:02:59,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 4149 transitions. [2023-11-06 22:02:59,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5462804476629362 [2023-11-06 22:02:59,461 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 4149 transitions. [2023-11-06 22:02:59,461 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 4149 transitions. [2023-11-06 22:02:59,465 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:02:59,465 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 4149 transitions. [2023-11-06 22:02:59,476 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 84.6734693877551) internal successors, (4149), 49 states have internal predecessors, (4149), 0 states have call successors, (0), 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 22:02:59,492 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 155.0) internal successors, (7750), 50 states have internal predecessors, (7750), 0 states have call successors, (0), 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 22:02:59,496 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 155.0) internal successors, (7750), 50 states have internal predecessors, (7750), 0 states have call successors, (0), 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 22:02:59,496 INFO L175 Difference]: Start difference. First operand has 112 places, 272 transitions, 4213 flow. Second operand 49 states and 4149 transitions. [2023-11-06 22:02:59,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 1238 transitions, 16656 flow [2023-11-06 22:03:00,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 1238 transitions, 14373 flow, removed 1134 selfloop flow, removed 2 redundant places. [2023-11-06 22:03:00,036 INFO L231 Difference]: Finished difference. Result has 204 places, 914 transitions, 14835 flow [2023-11-06 22:03:00,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=155, PETRI_DIFFERENCE_MINUEND_FLOW=3896, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=250, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=14835, PETRI_PLACES=204, PETRI_TRANSITIONS=914} [2023-11-06 22:03:00,038 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 178 predicate places. [2023-11-06 22:03:00,038 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 914 transitions, 14835 flow [2023-11-06 22:03:00,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 75.08163265306122) internal successors, (3679), 49 states have internal predecessors, (3679), 0 states have call successors, (0), 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 22:03:00,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:03:00,040 INFO L208 CegarLoopForPetriNet]: trace histogram [46, 1, 1, 1, 1] [2023-11-06 22:03:00,053 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_588ca069-85b6-4f5e-a705-30f116c19aa6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:03:00,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_588ca069-85b6-4f5e-a705-30f116c19aa6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:03:00,247 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-06 22:03:00,247 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:03:00,247 INFO L85 PathProgramCache]: Analyzing trace with hash 211719725, now seen corresponding path program 5 times [2023-11-06 22:03:00,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:03:00,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038988590] [2023-11-06 22:03:00,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:03:00,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:03:00,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:03:02,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:03:02,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:03:02,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038988590] [2023-11-06 22:03:02,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038988590] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:03:02,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507575025] [2023-11-06 22:03:02,631 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:03:02,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:03:02,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_588ca069-85b6-4f5e-a705-30f116c19aa6/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:03:02,633 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_588ca069-85b6-4f5e-a705-30f116c19aa6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:03:02,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_588ca069-85b6-4f5e-a705-30f116c19aa6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 22:03:02,815 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2023-11-06 22:03:02,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:03:02,818 INFO L262 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 49 conjunts are in the unsatisfiable core [2023-11-06 22:03:02,823 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:03:02,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:03:02,987 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:03:06,685 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:03:06,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507575025] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:03:06,685 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:03:06,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 95 [2023-11-06 22:03:06,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267465864] [2023-11-06 22:03:06,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:03:06,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2023-11-06 22:03:06,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:03:06,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2023-11-06 22:03:06,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2023-11-06 22:03:06,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 155 [2023-11-06 22:03:06,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 914 transitions, 14835 flow. Second operand has 97 states, 97 states have (on average 75.04123711340206) internal successors, (7279), 97 states have internal predecessors, (7279), 0 states have call successors, (0), 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 22:03:06,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:03:06,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 155 [2023-11-06 22:03:06,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:03:37,760 INFO L124 PetriNetUnfolderBase]: 27848/48813 cut-off events. [2023-11-06 22:03:37,760 INFO L125 PetriNetUnfolderBase]: For 7535701/7536254 co-relation queries the response was YES. [2023-11-06 22:03:38,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 218056 conditions, 48813 events. 27848/48813 cut-off events. For 7535701/7536254 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 356381 event pairs, 3079 based on Foata normal form. 3075/51888 useless extension candidates. Maximal degree in co-relation 217957. Up to 14063 conditions per place. [2023-11-06 22:03:38,874 INFO L140 encePairwiseOnDemand]: 150/155 looper letters, 409 selfloop transitions, 3322 changer transitions 282/4016 dead transitions. [2023-11-06 22:03:38,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 4016 transitions, 59606 flow [2023-11-06 22:03:38,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2023-11-06 22:03:38,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2023-11-06 22:03:38,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 8229 transitions. [2023-11-06 22:03:38,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5473229132025275 [2023-11-06 22:03:38,893 INFO L72 ComplementDD]: Start complementDD. Operand 97 states and 8229 transitions. [2023-11-06 22:03:38,893 INFO L73 IsDeterministic]: Start isDeterministic. Operand 97 states and 8229 transitions. [2023-11-06 22:03:38,900 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:03:38,900 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 97 states and 8229 transitions. [2023-11-06 22:03:38,935 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 98 states, 97 states have (on average 84.83505154639175) internal successors, (8229), 97 states have internal predecessors, (8229), 0 states have call successors, (0), 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 22:03:38,962 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 98 states, 98 states have (on average 155.0) internal successors, (15190), 98 states have internal predecessors, (15190), 0 states have call successors, (0), 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 22:03:38,967 INFO L81 ComplementDD]: Finished complementDD. Result has 98 states, 98 states have (on average 155.0) internal successors, (15190), 98 states have internal predecessors, (15190), 0 states have call successors, (0), 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 22:03:38,968 INFO L175 Difference]: Start difference. First operand has 204 places, 914 transitions, 14835 flow. Second operand 97 states and 8229 transitions. [2023-11-06 22:03:38,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 4016 transitions, 59606 flow [2023-11-06 22:03:46,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 4016 transitions, 50578 flow, removed 4326 selfloop flow, removed 11 redundant places. [2023-11-06 22:03:46,344 INFO L231 Difference]: Finished difference. Result has 383 places, 3356 transitions, 54620 flow [2023-11-06 22:03:46,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=155, PETRI_DIFFERENCE_MINUEND_FLOW=13773, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=914, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=890, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=97, PETRI_FLOW=54620, PETRI_PLACES=383, PETRI_TRANSITIONS=3356} [2023-11-06 22:03:46,346 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 357 predicate places. [2023-11-06 22:03:46,346 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 3356 transitions, 54620 flow [2023-11-06 22:03:46,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 75.04123711340206) internal successors, (7279), 97 states have internal predecessors, (7279), 0 states have call successors, (0), 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 22:03:46,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:03:46,349 INFO L208 CegarLoopForPetriNet]: trace histogram [94, 1, 1, 1, 1] [2023-11-06 22:03:46,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_588ca069-85b6-4f5e-a705-30f116c19aa6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 22:03:46,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_588ca069-85b6-4f5e-a705-30f116c19aa6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:03:46,559 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-06 22:03:46,560 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:03:46,560 INFO L85 PathProgramCache]: Analyzing trace with hash -501704147, now seen corresponding path program 6 times [2023-11-06 22:03:46,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:03:46,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467671443] [2023-11-06 22:03:46,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:03:46,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:03:46,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:03:53,424 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:03:53,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:03:53,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467671443] [2023-11-06 22:03:53,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467671443] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:03:53,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31050593] [2023-11-06 22:03:53,426 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:03:53,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:03:53,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_588ca069-85b6-4f5e-a705-30f116c19aa6/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:03:53,430 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_588ca069-85b6-4f5e-a705-30f116c19aa6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:03:53,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_588ca069-85b6-4f5e-a705-30f116c19aa6/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 22:03:53,817 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 48 check-sat command(s) [2023-11-06 22:03:53,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:03:53,825 INFO L262 TraceCheckSpWp]: Trace formula consists of 905 conjuncts, 97 conjunts are in the unsatisfiable core [2023-11-06 22:03:53,833 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:03:54,091 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:03:54,091 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:04:05,926 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:04:05,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31050593] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:04:05,926 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:04:05,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95, 95] total 191 [2023-11-06 22:04:05,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468648929] [2023-11-06 22:04:05,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:04:05,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2023-11-06 22:04:05,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:04:05,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2023-11-06 22:04:05,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2023-11-06 22:04:06,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 155 [2023-11-06 22:04:06,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 3356 transitions, 54620 flow. Second operand has 193 states, 193 states have (on average 75.02072538860104) internal successors, (14479), 193 states have internal predecessors, (14479), 0 states have call successors, (0), 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 22:04:06,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:04:06,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 155 [2023-11-06 22:04:06,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand