./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-more-queue-add-3-nl.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978acf84-9e95-4e4e-ad6e-44c8f413cb01/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978acf84-9e95-4e4e-ad6e-44c8f413cb01/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978acf84-9e95-4e4e-ad6e-44c8f413cb01/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978acf84-9e95-4e4e-ad6e-44c8f413cb01/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-queue-add-3-nl.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978acf84-9e95-4e4e-ad6e-44c8f413cb01/bin/uautomizer-TMbwUNV5ro/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978acf84-9e95-4e4e-ad6e-44c8f413cb01/bin/uautomizer-TMbwUNV5ro --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 c6847e0a77224cc67de11826c53270ee36a6eb5754e5add0bb0a49165dff2879 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-18 19:50:15,488 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 19:50:15,491 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 19:50:15,545 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 19:50:15,547 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 19:50:15,553 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 19:50:15,554 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 19:50:15,558 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 19:50:15,562 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 19:50:15,565 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 19:50:15,568 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 19:50:15,571 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 19:50:15,573 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 19:50:15,579 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 19:50:15,581 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 19:50:15,582 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 19:50:15,585 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 19:50:15,587 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 19:50:15,589 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 19:50:15,593 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 19:50:15,600 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 19:50:15,602 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 19:50:15,603 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 19:50:15,606 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 19:50:15,617 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 19:50:15,619 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 19:50:15,620 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 19:50:15,621 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 19:50:15,623 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 19:50:15,624 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 19:50:15,624 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 19:50:15,625 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 19:50:15,627 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 19:50:15,629 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 19:50:15,632 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 19:50:15,634 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 19:50:15,635 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 19:50:15,635 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 19:50:15,636 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 19:50:15,637 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 19:50:15,638 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 19:50:15,639 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978acf84-9e95-4e4e-ad6e-44c8f413cb01/bin/uautomizer-TMbwUNV5ro/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-11-18 19:50:15,686 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 19:50:15,686 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 19:50:15,687 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 19:50:15,688 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 19:50:15,689 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 19:50:15,689 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 19:50:15,690 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 19:50:15,691 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 19:50:15,691 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 19:50:15,691 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 19:50:15,693 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 19:50:15,693 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-18 19:50:15,694 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 19:50:15,694 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 19:50:15,694 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 19:50:15,695 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 19:50:15,695 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 19:50:15,695 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 19:50:15,696 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-18 19:50:15,696 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 19:50:15,696 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 19:50:15,697 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 19:50:15,697 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 19:50:15,697 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 19:50:15,698 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 19:50:15,698 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 19:50:15,699 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 19:50:15,699 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 19:50:15,699 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 19:50:15,700 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 19:50:15,700 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 19:50:15,700 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 19:50:15,701 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 19:50:15,701 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 19:50:15,702 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 19:50:15,702 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_978acf84-9e95-4e4e-ad6e-44c8f413cb01/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978acf84-9e95-4e4e-ad6e-44c8f413cb01/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c6847e0a77224cc67de11826c53270ee36a6eb5754e5add0bb0a49165dff2879 [2022-11-18 19:50:16,124 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 19:50:16,155 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 19:50:16,159 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 19:50:16,161 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 19:50:16,162 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 19:50:16,164 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978acf84-9e95-4e4e-ad6e-44c8f413cb01/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/weaver/popl20-more-queue-add-3-nl.wvr.c [2022-11-18 19:50:16,256 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978acf84-9e95-4e4e-ad6e-44c8f413cb01/bin/uautomizer-TMbwUNV5ro/data/06105ab57/548b05d4890b4baf82e639e8d61db308/FLAG40d0c242e [2022-11-18 19:50:16,791 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 19:50:16,792 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978acf84-9e95-4e4e-ad6e-44c8f413cb01/sv-benchmarks/c/weaver/popl20-more-queue-add-3-nl.wvr.c [2022-11-18 19:50:16,801 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978acf84-9e95-4e4e-ad6e-44c8f413cb01/bin/uautomizer-TMbwUNV5ro/data/06105ab57/548b05d4890b4baf82e639e8d61db308/FLAG40d0c242e [2022-11-18 19:50:17,139 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978acf84-9e95-4e4e-ad6e-44c8f413cb01/bin/uautomizer-TMbwUNV5ro/data/06105ab57/548b05d4890b4baf82e639e8d61db308 [2022-11-18 19:50:17,142 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 19:50:17,146 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 19:50:17,152 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 19:50:17,152 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 19:50:17,157 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 19:50:17,158 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 07:50:17" (1/1) ... [2022-11-18 19:50:17,161 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@763fcbc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:50:17, skipping insertion in model container [2022-11-18 19:50:17,161 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 07:50:17" (1/1) ... [2022-11-18 19:50:17,172 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 19:50:17,226 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 19:50:17,514 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978acf84-9e95-4e4e-ad6e-44c8f413cb01/sv-benchmarks/c/weaver/popl20-more-queue-add-3-nl.wvr.c[3615,3628] [2022-11-18 19:50:17,522 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 19:50:17,534 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 19:50:17,570 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978acf84-9e95-4e4e-ad6e-44c8f413cb01/sv-benchmarks/c/weaver/popl20-more-queue-add-3-nl.wvr.c[3615,3628] [2022-11-18 19:50:17,574 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 19:50:17,591 INFO L208 MainTranslator]: Completed translation [2022-11-18 19:50:17,592 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:50:17 WrapperNode [2022-11-18 19:50:17,592 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 19:50:17,593 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 19:50:17,593 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 19:50:17,594 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 19:50:17,601 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:50:17" (1/1) ... [2022-11-18 19:50:17,612 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:50:17" (1/1) ... [2022-11-18 19:50:17,652 INFO L138 Inliner]: procedures = 26, calls = 55, calls flagged for inlining = 16, calls inlined = 18, statements flattened = 277 [2022-11-18 19:50:17,653 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 19:50:17,654 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 19:50:17,654 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 19:50:17,654 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 19:50:17,672 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:50:17" (1/1) ... [2022-11-18 19:50:17,673 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:50:17" (1/1) ... [2022-11-18 19:50:17,694 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:50:17" (1/1) ... [2022-11-18 19:50:17,694 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:50:17" (1/1) ... [2022-11-18 19:50:17,704 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:50:17" (1/1) ... [2022-11-18 19:50:17,734 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:50:17" (1/1) ... [2022-11-18 19:50:17,736 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:50:17" (1/1) ... [2022-11-18 19:50:17,738 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:50:17" (1/1) ... [2022-11-18 19:50:17,742 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 19:50:17,743 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 19:50:17,743 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 19:50:17,743 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 19:50:17,744 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:50:17" (1/1) ... [2022-11-18 19:50:17,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 19:50:17,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978acf84-9e95-4e4e-ad6e-44c8f413cb01/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:50:17,790 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978acf84-9e95-4e4e-ad6e-44c8f413cb01/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 19:50:17,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978acf84-9e95-4e4e-ad6e-44c8f413cb01/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 19:50:17,835 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 19:50:17,835 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 19:50:17,836 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 19:50:17,836 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 19:50:17,836 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-18 19:50:17,836 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-18 19:50:17,837 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-18 19:50:17,837 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-18 19:50:17,837 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-18 19:50:17,837 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-18 19:50:17,838 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 19:50:17,838 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-18 19:50:17,838 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-18 19:50:17,838 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-18 19:50:17,839 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 19:50:17,839 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 19:50:17,839 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 19:50:17,841 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-18 19:50:18,041 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 19:50:18,044 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 19:50:18,767 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 19:50:19,018 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 19:50:19,019 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-11-18 19:50:19,023 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 07:50:19 BoogieIcfgContainer [2022-11-18 19:50:19,023 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 19:50:19,027 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 19:50:19,027 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 19:50:19,031 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 19:50:19,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 07:50:17" (1/3) ... [2022-11-18 19:50:19,032 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@179a40be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 07:50:19, skipping insertion in model container [2022-11-18 19:50:19,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:50:17" (2/3) ... [2022-11-18 19:50:19,033 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@179a40be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 07:50:19, skipping insertion in model container [2022-11-18 19:50:19,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 07:50:19" (3/3) ... [2022-11-18 19:50:19,035 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-queue-add-3-nl.wvr.c [2022-11-18 19:50:19,051 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-18 19:50:19,063 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 19:50:19,064 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2022-11-18 19:50:19,064 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-18 19:50:19,239 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-18 19:50:19,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 244 places, 252 transitions, 528 flow [2022-11-18 19:50:19,449 INFO L130 PetriNetUnfolder]: 18/249 cut-off events. [2022-11-18 19:50:19,449 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-18 19:50:19,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 262 conditions, 249 events. 18/249 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 232 event pairs, 0 based on Foata normal form. 0/211 useless extension candidates. Maximal degree in co-relation 204. Up to 3 conditions per place. [2022-11-18 19:50:19,460 INFO L82 GeneralOperation]: Start removeDead. Operand has 244 places, 252 transitions, 528 flow [2022-11-18 19:50:19,478 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 221 places, 228 transitions, 471 flow [2022-11-18 19:50:19,510 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 19:50:19,522 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;@1b62e76f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 19:50:19,522 INFO L358 AbstractCegarLoop]: Starting to check reachability of 39 error locations. [2022-11-18 19:50:19,547 INFO L130 PetriNetUnfolder]: 3/85 cut-off events. [2022-11-18 19:50:19,547 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 19:50:19,547 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:50:19,548 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:50:19,549 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2022-11-18 19:50:19,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:50:19,556 INFO L85 PathProgramCache]: Analyzing trace with hash 573287275, now seen corresponding path program 1 times [2022-11-18 19:50:19,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:50:19,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670476370] [2022-11-18 19:50:19,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:50:19,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:50:19,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:20,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:50:20,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:50:20,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670476370] [2022-11-18 19:50:20,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670476370] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:50:20,160 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:50:20,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:50:20,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949132668] [2022-11-18 19:50:20,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:50:20,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 19:50:20,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:50:20,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 19:50:20,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 19:50:20,236 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 252 [2022-11-18 19:50:20,245 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 228 transitions, 471 flow. Second operand has 4 states, 4 states have (on average 194.5) internal successors, (778), 4 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:20,246 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:50:20,246 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 252 [2022-11-18 19:50:20,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:50:21,285 INFO L130 PetriNetUnfolder]: 585/1775 cut-off events. [2022-11-18 19:50:21,285 INFO L131 PetriNetUnfolder]: For 170/170 co-relation queries the response was YES. [2022-11-18 19:50:21,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2803 conditions, 1775 events. 585/1775 cut-off events. For 170/170 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 11882 event pairs, 328 based on Foata normal form. 212/1329 useless extension candidates. Maximal degree in co-relation 1220. Up to 437 conditions per place. [2022-11-18 19:50:21,312 INFO L137 encePairwiseOnDemand]: 222/252 looper letters, 62 selfloop transitions, 9 changer transitions 5/243 dead transitions. [2022-11-18 19:50:21,312 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 243 transitions, 658 flow [2022-11-18 19:50:21,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 19:50:21,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-18 19:50:21,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1070 transitions. [2022-11-18 19:50:21,333 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8492063492063492 [2022-11-18 19:50:21,336 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1070 transitions. [2022-11-18 19:50:21,337 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1070 transitions. [2022-11-18 19:50:21,342 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:50:21,345 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1070 transitions. [2022-11-18 19:50:21,354 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 214.0) internal successors, (1070), 5 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:21,365 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 252.0) internal successors, (1512), 6 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:21,367 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 252.0) internal successors, (1512), 6 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:21,369 INFO L175 Difference]: Start difference. First operand has 221 places, 228 transitions, 471 flow. Second operand 5 states and 1070 transitions. [2022-11-18 19:50:21,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 243 transitions, 658 flow [2022-11-18 19:50:21,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 243 transitions, 640 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-18 19:50:21,388 INFO L231 Difference]: Finished difference. Result has 218 places, 213 transitions, 485 flow [2022-11-18 19:50:21,391 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=428, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=485, PETRI_PLACES=218, PETRI_TRANSITIONS=213} [2022-11-18 19:50:21,395 INFO L288 CegarLoopForPetriNet]: 221 programPoint places, -3 predicate places. [2022-11-18 19:50:21,396 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 213 transitions, 485 flow [2022-11-18 19:50:21,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 194.5) internal successors, (778), 4 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:21,397 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:50:21,398 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:50:21,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 19:50:21,399 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2022-11-18 19:50:21,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:50:21,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1045631469, now seen corresponding path program 1 times [2022-11-18 19:50:21,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:50:21,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629833655] [2022-11-18 19:50:21,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:50:21,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:50:21,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:21,760 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:50:21,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:50:21,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629833655] [2022-11-18 19:50:21,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629833655] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:50:21,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352067451] [2022-11-18 19:50:21,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:50:21,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:50:21,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978acf84-9e95-4e4e-ad6e-44c8f413cb01/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:50:21,767 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978acf84-9e95-4e4e-ad6e-44c8f413cb01/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:50:21,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978acf84-9e95-4e4e-ad6e-44c8f413cb01/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 19:50:21,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:21,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-18 19:50:21,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:50:22,089 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:50:22,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:50:22,194 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:50:22,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352067451] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:50:22,198 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:50:22,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-18 19:50:22,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75930827] [2022-11-18 19:50:22,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:50:22,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 19:50:22,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:50:22,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 19:50:22,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-18 19:50:22,211 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 252 [2022-11-18 19:50:22,216 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 213 transitions, 485 flow. Second operand has 12 states, 12 states have (on average 195.66666666666666) internal successors, (2348), 12 states have internal predecessors, (2348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:22,217 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:50:22,217 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 252 [2022-11-18 19:50:22,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:50:24,016 INFO L130 PetriNetUnfolder]: 1461/4290 cut-off events. [2022-11-18 19:50:24,016 INFO L131 PetriNetUnfolder]: For 117/117 co-relation queries the response was YES. [2022-11-18 19:50:24,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6779 conditions, 4290 events. 1461/4290 cut-off events. For 117/117 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 33554 event pairs, 820 based on Foata normal form. 6/2676 useless extension candidates. Maximal degree in co-relation 5204. Up to 430 conditions per place. [2022-11-18 19:50:24,065 INFO L137 encePairwiseOnDemand]: 237/252 looper letters, 131 selfloop transitions, 40 changer transitions 0/338 dead transitions. [2022-11-18 19:50:24,065 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 338 transitions, 1151 flow [2022-11-18 19:50:24,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-18 19:50:24,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-18 19:50:24,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3651 transitions. [2022-11-18 19:50:24,075 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8048941798941799 [2022-11-18 19:50:24,076 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3651 transitions. [2022-11-18 19:50:24,076 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3651 transitions. [2022-11-18 19:50:24,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:50:24,079 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3651 transitions. [2022-11-18 19:50:24,089 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 202.83333333333334) internal successors, (3651), 18 states have internal predecessors, (3651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:24,100 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 252.0) internal successors, (4788), 19 states have internal predecessors, (4788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:24,103 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 252.0) internal successors, (4788), 19 states have internal predecessors, (4788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:24,104 INFO L175 Difference]: Start difference. First operand has 218 places, 213 transitions, 485 flow. Second operand 18 states and 3651 transitions. [2022-11-18 19:50:24,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 338 transitions, 1151 flow [2022-11-18 19:50:24,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 338 transitions, 1146 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 19:50:24,115 INFO L231 Difference]: Finished difference. Result has 233 places, 240 transitions, 718 flow [2022-11-18 19:50:24,116 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=480, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=718, PETRI_PLACES=233, PETRI_TRANSITIONS=240} [2022-11-18 19:50:24,117 INFO L288 CegarLoopForPetriNet]: 221 programPoint places, 12 predicate places. [2022-11-18 19:50:24,117 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 240 transitions, 718 flow [2022-11-18 19:50:24,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 195.66666666666666) internal successors, (2348), 12 states have internal predecessors, (2348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:24,120 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:50:24,120 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:50:24,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978acf84-9e95-4e4e-ad6e-44c8f413cb01/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 19:50:24,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978acf84-9e95-4e4e-ad6e-44c8f413cb01/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:50:24,328 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2022-11-18 19:50:24,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:50:24,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1945163594, now seen corresponding path program 1 times [2022-11-18 19:50:24,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:50:24,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456265384] [2022-11-18 19:50:24,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:50:24,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:50:24,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:24,554 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:50:24,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:50:24,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456265384] [2022-11-18 19:50:24,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456265384] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:50:24,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270687149] [2022-11-18 19:50:24,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:50:24,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:50:24,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978acf84-9e95-4e4e-ad6e-44c8f413cb01/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:50:24,564 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978acf84-9e95-4e4e-ad6e-44c8f413cb01/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:50:24,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978acf84-9e95-4e4e-ad6e-44c8f413cb01/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 19:50:24,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:24,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-18 19:50:24,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:50:24,758 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:50:24,759 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:50:24,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270687149] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:50:24,759 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 19:50:24,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-18 19:50:24,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36378464] [2022-11-18 19:50:24,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:50:24,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 19:50:24,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:50:24,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 19:50:24,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-18 19:50:24,764 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 252 [2022-11-18 19:50:24,766 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 240 transitions, 718 flow. Second operand has 6 states, 6 states have (on average 195.33333333333334) internal successors, (1172), 6 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:24,767 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:50:24,767 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 252 [2022-11-18 19:50:24,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:50:26,211 INFO L130 PetriNetUnfolder]: 1461/4282 cut-off events. [2022-11-18 19:50:26,211 INFO L131 PetriNetUnfolder]: For 211/211 co-relation queries the response was YES. [2022-11-18 19:50:26,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6816 conditions, 4282 events. 1461/4282 cut-off events. For 211/211 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 33549 event pairs, 820 based on Foata normal form. 8/2670 useless extension candidates. Maximal degree in co-relation 5426. Up to 1676 conditions per place. [2022-11-18 19:50:26,264 INFO L137 encePairwiseOnDemand]: 241/252 looper letters, 63 selfloop transitions, 27 changer transitions 0/257 dead transitions. [2022-11-18 19:50:26,264 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 257 transitions, 904 flow [2022-11-18 19:50:26,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 19:50:26,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-18 19:50:26,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1422 transitions. [2022-11-18 19:50:26,269 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8061224489795918 [2022-11-18 19:50:26,270 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1422 transitions. [2022-11-18 19:50:26,270 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1422 transitions. [2022-11-18 19:50:26,271 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:50:26,271 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1422 transitions. [2022-11-18 19:50:26,275 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 203.14285714285714) internal successors, (1422), 7 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:26,280 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 252.0) internal successors, (2016), 8 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:26,282 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 252.0) internal successors, (2016), 8 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:26,282 INFO L175 Difference]: Start difference. First operand has 233 places, 240 transitions, 718 flow. Second operand 7 states and 1422 transitions. [2022-11-18 19:50:26,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 257 transitions, 904 flow [2022-11-18 19:50:26,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 257 transitions, 830 flow, removed 26 selfloop flow, removed 5 redundant places. [2022-11-18 19:50:26,292 INFO L231 Difference]: Finished difference. Result has 228 places, 232 transitions, 644 flow [2022-11-18 19:50:26,293 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=590, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=644, PETRI_PLACES=228, PETRI_TRANSITIONS=232} [2022-11-18 19:50:26,294 INFO L288 CegarLoopForPetriNet]: 221 programPoint places, 7 predicate places. [2022-11-18 19:50:26,294 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 232 transitions, 644 flow [2022-11-18 19:50:26,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 195.33333333333334) internal successors, (1172), 6 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:26,296 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:50:26,296 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:50:26,310 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978acf84-9e95-4e4e-ad6e-44c8f413cb01/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 19:50:26,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978acf84-9e95-4e4e-ad6e-44c8f413cb01/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:50:26,504 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2022-11-18 19:50:26,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:50:26,505 INFO L85 PathProgramCache]: Analyzing trace with hash -304126613, now seen corresponding path program 2 times [2022-11-18 19:50:26,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:50:26,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956062381] [2022-11-18 19:50:26,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:50:26,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:50:26,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:26,941 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:50:26,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:50:26,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956062381] [2022-11-18 19:50:26,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956062381] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:50:26,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401677436] [2022-11-18 19:50:26,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:50:26,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:50:26,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978acf84-9e95-4e4e-ad6e-44c8f413cb01/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:50:26,951 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978acf84-9e95-4e4e-ad6e-44c8f413cb01/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:50:26,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978acf84-9e95-4e4e-ad6e-44c8f413cb01/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 19:50:27,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 19:50:27,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:50:27,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-18 19:50:27,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:50:27,383 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-18 19:50:27,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:50:27,648 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-18 19:50:27,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401677436] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:50:27,649 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:50:27,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 17 [2022-11-18 19:50:27,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967039588] [2022-11-18 19:50:27,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:50:27,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 19:50:27,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:50:27,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 19:50:27,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-11-18 19:50:27,656 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 252 [2022-11-18 19:50:27,663 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 232 transitions, 644 flow. Second operand has 18 states, 18 states have (on average 181.61111111111111) internal successors, (3269), 18 states have internal predecessors, (3269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:27,663 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:50:27,664 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 252 [2022-11-18 19:50:27,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:50:30,363 INFO L130 PetriNetUnfolder]: 897/3698 cut-off events. [2022-11-18 19:50:30,364 INFO L131 PetriNetUnfolder]: For 245/245 co-relation queries the response was YES. [2022-11-18 19:50:30,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5484 conditions, 3698 events. 897/3698 cut-off events. For 245/245 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 29205 event pairs, 546 based on Foata normal form. 4/2771 useless extension candidates. Maximal degree in co-relation 4386. Up to 231 conditions per place. [2022-11-18 19:50:30,399 INFO L137 encePairwiseOnDemand]: 229/252 looper letters, 156 selfloop transitions, 65 changer transitions 0/373 dead transitions. [2022-11-18 19:50:30,399 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 373 transitions, 1463 flow [2022-11-18 19:50:30,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-18 19:50:30,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2022-11-18 19:50:30,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 8968 transitions. [2022-11-18 19:50:30,421 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7262714609653386 [2022-11-18 19:50:30,422 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 8968 transitions. [2022-11-18 19:50:30,422 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 8968 transitions. [2022-11-18 19:50:30,428 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:50:30,428 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 8968 transitions. [2022-11-18 19:50:30,450 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 183.0204081632653) internal successors, (8968), 49 states have internal predecessors, (8968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:30,477 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 252.0) internal successors, (12600), 50 states have internal predecessors, (12600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:30,484 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 252.0) internal successors, (12600), 50 states have internal predecessors, (12600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:30,484 INFO L175 Difference]: Start difference. First operand has 228 places, 232 transitions, 644 flow. Second operand 49 states and 8968 transitions. [2022-11-18 19:50:30,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 373 transitions, 1463 flow [2022-11-18 19:50:30,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 373 transitions, 1420 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-18 19:50:30,494 INFO L231 Difference]: Finished difference. Result has 271 places, 254 transitions, 853 flow [2022-11-18 19:50:30,495 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=594, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=853, PETRI_PLACES=271, PETRI_TRANSITIONS=254} [2022-11-18 19:50:30,496 INFO L288 CegarLoopForPetriNet]: 221 programPoint places, 50 predicate places. [2022-11-18 19:50:30,496 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 254 transitions, 853 flow [2022-11-18 19:50:30,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 181.61111111111111) internal successors, (3269), 18 states have internal predecessors, (3269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:30,498 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:50:30,499 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:50:30,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978acf84-9e95-4e4e-ad6e-44c8f413cb01/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 19:50:30,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978acf84-9e95-4e4e-ad6e-44c8f413cb01/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-11-18 19:50:30,706 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2022-11-18 19:50:30,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:50:30,707 INFO L85 PathProgramCache]: Analyzing trace with hash 531379821, now seen corresponding path program 1 times [2022-11-18 19:50:30,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:50:30,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051115626] [2022-11-18 19:50:30,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:50:30,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:50:30,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:30,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:50:30,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:50:30,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051115626] [2022-11-18 19:50:30,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051115626] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:50:30,852 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:50:30,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:50:30,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83384594] [2022-11-18 19:50:30,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:50:30,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 19:50:30,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:50:30,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 19:50:30,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 19:50:30,855 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 252 [2022-11-18 19:50:30,866 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 254 transitions, 853 flow. Second operand has 4 states, 4 states have (on average 208.5) internal successors, (834), 4 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:30,867 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:50:30,867 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 252 [2022-11-18 19:50:30,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:50:33,803 INFO L130 PetriNetUnfolder]: 4530/10397 cut-off events. [2022-11-18 19:50:33,803 INFO L131 PetriNetUnfolder]: For 362/362 co-relation queries the response was YES. [2022-11-18 19:50:33,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19134 conditions, 10397 events. 4530/10397 cut-off events. For 362/362 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 90790 event pairs, 2121 based on Foata normal form. 0/7807 useless extension candidates. Maximal degree in co-relation 18845. Up to 4124 conditions per place. [2022-11-18 19:50:33,937 INFO L137 encePairwiseOnDemand]: 246/252 looper letters, 50 selfloop transitions, 4 changer transitions 0/286 dead transitions. [2022-11-18 19:50:33,938 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 286 transitions, 1036 flow [2022-11-18 19:50:33,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 19:50:33,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-18 19:50:33,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1091 transitions. [2022-11-18 19:50:33,943 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8658730158730159 [2022-11-18 19:50:33,943 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1091 transitions. [2022-11-18 19:50:33,943 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1091 transitions. [2022-11-18 19:50:33,944 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:50:33,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1091 transitions. [2022-11-18 19:50:33,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 218.2) internal successors, (1091), 5 states have internal predecessors, (1091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:33,953 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 252.0) internal successors, (1512), 6 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:33,954 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 252.0) internal successors, (1512), 6 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:33,954 INFO L175 Difference]: Start difference. First operand has 271 places, 254 transitions, 853 flow. Second operand 5 states and 1091 transitions. [2022-11-18 19:50:33,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 286 transitions, 1036 flow [2022-11-18 19:50:33,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 286 transitions, 953 flow, removed 9 selfloop flow, removed 15 redundant places. [2022-11-18 19:50:33,972 INFO L231 Difference]: Finished difference. Result has 263 places, 257 transitions, 800 flow [2022-11-18 19:50:33,973 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=770, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=800, PETRI_PLACES=263, PETRI_TRANSITIONS=257} [2022-11-18 19:50:33,976 INFO L288 CegarLoopForPetriNet]: 221 programPoint places, 42 predicate places. [2022-11-18 19:50:33,976 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 257 transitions, 800 flow [2022-11-18 19:50:33,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 208.5) internal successors, (834), 4 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:33,977 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:50:33,977 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:50:33,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-18 19:50:33,978 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2022-11-18 19:50:33,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:50:33,979 INFO L85 PathProgramCache]: Analyzing trace with hash 571255261, now seen corresponding path program 1 times [2022-11-18 19:50:33,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:50:33,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312229527] [2022-11-18 19:50:33,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:50:33,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:50:34,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:34,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:50:34,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:50:34,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312229527] [2022-11-18 19:50:34,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312229527] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:50:34,257 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:50:34,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 19:50:34,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982135457] [2022-11-18 19:50:34,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:50:34,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 19:50:34,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:50:34,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 19:50:34,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:50:34,265 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 252 [2022-11-18 19:50:34,267 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 257 transitions, 800 flow. Second operand has 6 states, 6 states have (on average 194.66666666666666) internal successors, (1168), 6 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:34,268 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:50:34,268 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 252 [2022-11-18 19:50:34,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:50:35,665 INFO L130 PetriNetUnfolder]: 1115/5106 cut-off events. [2022-11-18 19:50:35,665 INFO L131 PetriNetUnfolder]: For 447/447 co-relation queries the response was YES. [2022-11-18 19:50:35,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7878 conditions, 5106 events. 1115/5106 cut-off events. For 447/447 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 47244 event pairs, 905 based on Foata normal form. 24/4054 useless extension candidates. Maximal degree in co-relation 7558. Up to 1757 conditions per place. [2022-11-18 19:50:35,731 INFO L137 encePairwiseOnDemand]: 241/252 looper letters, 73 selfloop transitions, 13 changer transitions 2/266 dead transitions. [2022-11-18 19:50:35,732 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 266 transitions, 999 flow [2022-11-18 19:50:35,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 19:50:35,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-18 19:50:35,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1391 transitions. [2022-11-18 19:50:35,736 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7885487528344671 [2022-11-18 19:50:35,737 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1391 transitions. [2022-11-18 19:50:35,737 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1391 transitions. [2022-11-18 19:50:35,738 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:50:35,738 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1391 transitions. [2022-11-18 19:50:35,742 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 198.71428571428572) internal successors, (1391), 7 states have internal predecessors, (1391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:35,745 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 252.0) internal successors, (2016), 8 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:35,747 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 252.0) internal successors, (2016), 8 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:35,747 INFO L175 Difference]: Start difference. First operand has 263 places, 257 transitions, 800 flow. Second operand 7 states and 1391 transitions. [2022-11-18 19:50:35,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 266 transitions, 999 flow [2022-11-18 19:50:35,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 266 transitions, 997 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 19:50:35,757 INFO L231 Difference]: Finished difference. Result has 269 places, 257 transitions, 833 flow [2022-11-18 19:50:35,758 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=798, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=833, PETRI_PLACES=269, PETRI_TRANSITIONS=257} [2022-11-18 19:50:35,762 INFO L288 CegarLoopForPetriNet]: 221 programPoint places, 48 predicate places. [2022-11-18 19:50:35,762 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 257 transitions, 833 flow [2022-11-18 19:50:35,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 194.66666666666666) internal successors, (1168), 6 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:35,764 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:50:35,764 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:50:35,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-18 19:50:35,766 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2022-11-18 19:50:35,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:50:35,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1394336290, now seen corresponding path program 1 times [2022-11-18 19:50:35,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:50:35,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880170626] [2022-11-18 19:50:35,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:50:35,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:50:35,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:35,942 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:50:35,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:50:35,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880170626] [2022-11-18 19:50:35,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880170626] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:50:35,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795140452] [2022-11-18 19:50:35,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:50:35,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:50:35,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978acf84-9e95-4e4e-ad6e-44c8f413cb01/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:50:35,945 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978acf84-9e95-4e4e-ad6e-44c8f413cb01/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:50:35,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978acf84-9e95-4e4e-ad6e-44c8f413cb01/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 19:50:36,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:36,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-18 19:50:36,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:50:36,296 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 19:50:36,296 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:50:36,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795140452] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:50:36,297 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 19:50:36,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 10 [2022-11-18 19:50:36,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083457232] [2022-11-18 19:50:36,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:50:36,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 19:50:36,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:50:36,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 19:50:36,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-18 19:50:36,300 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 252 [2022-11-18 19:50:36,302 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 257 transitions, 833 flow. Second operand has 6 states, 6 states have (on average 194.5) internal successors, (1167), 6 states have internal predecessors, (1167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:36,302 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:50:36,303 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 252 [2022-11-18 19:50:36,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:50:37,850 INFO L130 PetriNetUnfolder]: 1121/5538 cut-off events. [2022-11-18 19:50:37,850 INFO L131 PetriNetUnfolder]: For 659/659 co-relation queries the response was YES. [2022-11-18 19:50:37,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9148 conditions, 5538 events. 1121/5538 cut-off events. For 659/659 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 51559 event pairs, 905 based on Foata normal form. 92/4523 useless extension candidates. Maximal degree in co-relation 8211. Up to 1822 conditions per place. [2022-11-18 19:50:37,933 INFO L137 encePairwiseOnDemand]: 240/252 looper letters, 93 selfloop transitions, 21 changer transitions 1/293 dead transitions. [2022-11-18 19:50:37,934 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 293 transitions, 1224 flow [2022-11-18 19:50:37,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 19:50:37,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-18 19:50:37,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1782 transitions. [2022-11-18 19:50:37,939 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7857142857142857 [2022-11-18 19:50:37,940 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1782 transitions. [2022-11-18 19:50:37,940 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1782 transitions. [2022-11-18 19:50:37,941 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:50:37,941 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1782 transitions. [2022-11-18 19:50:37,946 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 198.0) internal successors, (1782), 9 states have internal predecessors, (1782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:37,950 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 252.0) internal successors, (2520), 10 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:37,952 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 252.0) internal successors, (2520), 10 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:37,952 INFO L175 Difference]: Start difference. First operand has 269 places, 257 transitions, 833 flow. Second operand 9 states and 1782 transitions. [2022-11-18 19:50:37,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 293 transitions, 1224 flow [2022-11-18 19:50:37,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 293 transitions, 1192 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-18 19:50:37,965 INFO L231 Difference]: Finished difference. Result has 274 places, 258 transitions, 866 flow [2022-11-18 19:50:37,966 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=808, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=866, PETRI_PLACES=274, PETRI_TRANSITIONS=258} [2022-11-18 19:50:37,967 INFO L288 CegarLoopForPetriNet]: 221 programPoint places, 53 predicate places. [2022-11-18 19:50:37,967 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 258 transitions, 866 flow [2022-11-18 19:50:37,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 194.5) internal successors, (1167), 6 states have internal predecessors, (1167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:37,968 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:50:37,968 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:50:37,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978acf84-9e95-4e4e-ad6e-44c8f413cb01/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 19:50:38,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978acf84-9e95-4e4e-ad6e-44c8f413cb01/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:50:38,175 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2022-11-18 19:50:38,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:50:38,175 INFO L85 PathProgramCache]: Analyzing trace with hash 200060538, now seen corresponding path program 1 times [2022-11-18 19:50:38,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:50:38,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887427741] [2022-11-18 19:50:38,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:50:38,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:50:38,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:38,344 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:50:38,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:50:38,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887427741] [2022-11-18 19:50:38,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887427741] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:50:38,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983662432] [2022-11-18 19:50:38,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:50:38,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:50:38,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978acf84-9e95-4e4e-ad6e-44c8f413cb01/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:50:38,353 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978acf84-9e95-4e4e-ad6e-44c8f413cb01/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:50:38,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978acf84-9e95-4e4e-ad6e-44c8f413cb01/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 19:50:38,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:38,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-18 19:50:38,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:50:38,921 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:50:38,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:50:39,380 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:50:39,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983662432] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:50:39,381 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:50:39,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 19 [2022-11-18 19:50:39,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957728576] [2022-11-18 19:50:39,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:50:39,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-18 19:50:39,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:50:39,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-18 19:50:39,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-11-18 19:50:39,389 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 252 [2022-11-18 19:50:39,394 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 258 transitions, 866 flow. Second operand has 19 states, 19 states have (on average 174.21052631578948) internal successors, (3310), 19 states have internal predecessors, (3310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:39,395 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:50:39,395 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 252 [2022-11-18 19:50:39,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:50:45,444 INFO L130 PetriNetUnfolder]: 8175/20680 cut-off events. [2022-11-18 19:50:45,444 INFO L131 PetriNetUnfolder]: For 6204/6562 co-relation queries the response was YES. [2022-11-18 19:50:45,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47170 conditions, 20680 events. 8175/20680 cut-off events. For 6204/6562 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 211142 event pairs, 1915 based on Foata normal form. 469/16563 useless extension candidates. Maximal degree in co-relation 39580. Up to 4657 conditions per place. [2022-11-18 19:50:45,718 INFO L137 encePairwiseOnDemand]: 229/252 looper letters, 279 selfloop transitions, 57 changer transitions 2/481 dead transitions. [2022-11-18 19:50:45,719 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 481 transitions, 2466 flow [2022-11-18 19:50:45,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-18 19:50:45,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-11-18 19:50:45,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 5318 transitions. [2022-11-18 19:50:45,741 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7034391534391534 [2022-11-18 19:50:45,741 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 5318 transitions. [2022-11-18 19:50:45,742 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 5318 transitions. [2022-11-18 19:50:45,746 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:50:45,746 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 5318 transitions. [2022-11-18 19:50:45,765 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 177.26666666666668) internal successors, (5318), 30 states have internal predecessors, (5318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:45,781 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 252.0) internal successors, (7812), 31 states have internal predecessors, (7812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:45,784 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 252.0) internal successors, (7812), 31 states have internal predecessors, (7812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:45,785 INFO L175 Difference]: Start difference. First operand has 274 places, 258 transitions, 866 flow. Second operand 30 states and 5318 transitions. [2022-11-18 19:50:45,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 481 transitions, 2466 flow [2022-11-18 19:50:45,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 481 transitions, 2438 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-18 19:50:45,849 INFO L231 Difference]: Finished difference. Result has 309 places, 282 transitions, 1173 flow [2022-11-18 19:50:45,850 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=840, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1173, PETRI_PLACES=309, PETRI_TRANSITIONS=282} [2022-11-18 19:50:45,853 INFO L288 CegarLoopForPetriNet]: 221 programPoint places, 88 predicate places. [2022-11-18 19:50:45,853 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 282 transitions, 1173 flow [2022-11-18 19:50:45,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 174.21052631578948) internal successors, (3310), 19 states have internal predecessors, (3310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:45,855 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:50:45,855 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:50:45,869 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978acf84-9e95-4e4e-ad6e-44c8f413cb01/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 19:50:46,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978acf84-9e95-4e4e-ad6e-44c8f413cb01/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:50:46,070 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2022-11-18 19:50:46,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:50:46,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1544509695, now seen corresponding path program 1 times [2022-11-18 19:50:46,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:50:46,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041518128] [2022-11-18 19:50:46,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:50:46,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:50:46,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:46,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:50:46,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:50:46,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041518128] [2022-11-18 19:50:46,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041518128] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:50:46,430 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:50:46,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 19:50:46,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880329635] [2022-11-18 19:50:46,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:50:46,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 19:50:46,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:50:46,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 19:50:46,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:50:46,433 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 252 [2022-11-18 19:50:46,435 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 282 transitions, 1173 flow. Second operand has 3 states, 3 states have (on average 215.66666666666666) internal successors, (647), 3 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:46,435 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:50:46,435 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 252 [2022-11-18 19:50:46,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:50:49,169 INFO L130 PetriNetUnfolder]: 2698/11071 cut-off events. [2022-11-18 19:50:49,169 INFO L131 PetriNetUnfolder]: For 11786/12338 co-relation queries the response was YES. [2022-11-18 19:50:49,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24778 conditions, 11071 events. 2698/11071 cut-off events. For 11786/12338 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 116055 event pairs, 871 based on Foata normal form. 401/8658 useless extension candidates. Maximal degree in co-relation 20810. Up to 3262 conditions per place. [2022-11-18 19:50:49,306 INFO L137 encePairwiseOnDemand]: 248/252 looper letters, 25 selfloop transitions, 2 changer transitions 1/289 dead transitions. [2022-11-18 19:50:49,307 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 289 transitions, 1270 flow [2022-11-18 19:50:49,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 19:50:49,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 19:50:49,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 664 transitions. [2022-11-18 19:50:49,310 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8783068783068783 [2022-11-18 19:50:49,310 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 664 transitions. [2022-11-18 19:50:49,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 664 transitions. [2022-11-18 19:50:49,311 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:50:49,311 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 664 transitions. [2022-11-18 19:50:49,313 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 221.33333333333334) internal successors, (664), 3 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:49,315 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 252.0) internal successors, (1008), 4 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:49,315 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 252.0) internal successors, (1008), 4 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:49,316 INFO L175 Difference]: Start difference. First operand has 309 places, 282 transitions, 1173 flow. Second operand 3 states and 664 transitions. [2022-11-18 19:50:49,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 289 transitions, 1270 flow [2022-11-18 19:50:49,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 289 transitions, 1203 flow, removed 8 selfloop flow, removed 13 redundant places. [2022-11-18 19:50:49,349 INFO L231 Difference]: Finished difference. Result has 299 places, 282 transitions, 1117 flow [2022-11-18 19:50:49,350 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=1106, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1117, PETRI_PLACES=299, PETRI_TRANSITIONS=282} [2022-11-18 19:50:49,351 INFO L288 CegarLoopForPetriNet]: 221 programPoint places, 78 predicate places. [2022-11-18 19:50:49,351 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 282 transitions, 1117 flow [2022-11-18 19:50:49,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 215.66666666666666) internal successors, (647), 3 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:49,352 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:50:49,352 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:50:49,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-18 19:50:49,352 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2022-11-18 19:50:49,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:50:49,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1052587979, now seen corresponding path program 1 times [2022-11-18 19:50:49,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:50:49,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270953975] [2022-11-18 19:50:49,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:50:49,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:50:49,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:49,813 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:50:49,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:50:49,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270953975] [2022-11-18 19:50:49,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270953975] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:50:49,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041638834] [2022-11-18 19:50:49,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:50:49,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:50:49,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978acf84-9e95-4e4e-ad6e-44c8f413cb01/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:50:49,816 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978acf84-9e95-4e4e-ad6e-44c8f413cb01/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:50:49,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978acf84-9e95-4e4e-ad6e-44c8f413cb01/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 19:50:49,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:49,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-18 19:50:49,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:50:50,208 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 19:50:50,208 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:50:50,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041638834] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:50:50,209 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 19:50:50,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2022-11-18 19:50:50,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274600166] [2022-11-18 19:50:50,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:50:50,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 19:50:50,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:50:50,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 19:50:50,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-18 19:50:50,215 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 252 [2022-11-18 19:50:50,216 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 282 transitions, 1117 flow. Second operand has 4 states, 4 states have (on average 213.5) internal successors, (854), 4 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:50,217 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:50:50,217 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 252 [2022-11-18 19:50:50,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:50:52,120 INFO L130 PetriNetUnfolder]: 1366/9022 cut-off events. [2022-11-18 19:50:52,120 INFO L131 PetriNetUnfolder]: For 8319/8409 co-relation queries the response was YES. [2022-11-18 19:50:52,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18323 conditions, 9022 events. 1366/9022 cut-off events. For 8319/8409 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 96948 event pairs, 859 based on Foata normal form. 492/8036 useless extension candidates. Maximal degree in co-relation 18050. Up to 2300 conditions per place. [2022-11-18 19:50:52,203 INFO L137 encePairwiseOnDemand]: 247/252 looper letters, 24 selfloop transitions, 3 changer transitions 0/280 dead transitions. [2022-11-18 19:50:52,203 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 280 transitions, 1161 flow [2022-11-18 19:50:52,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 19:50:52,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-18 19:50:52,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 862 transitions. [2022-11-18 19:50:52,206 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8551587301587301 [2022-11-18 19:50:52,206 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 862 transitions. [2022-11-18 19:50:52,206 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 862 transitions. [2022-11-18 19:50:52,207 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:50:52,207 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 862 transitions. [2022-11-18 19:50:52,209 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 215.5) internal successors, (862), 4 states have internal predecessors, (862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:52,211 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 252.0) internal successors, (1260), 5 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:52,212 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 252.0) internal successors, (1260), 5 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:52,212 INFO L175 Difference]: Start difference. First operand has 299 places, 282 transitions, 1117 flow. Second operand 4 states and 862 transitions. [2022-11-18 19:50:52,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 280 transitions, 1161 flow [2022-11-18 19:50:52,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 280 transitions, 1152 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-11-18 19:50:52,242 INFO L231 Difference]: Finished difference. Result has 297 places, 280 transitions, 1104 flow [2022-11-18 19:50:52,243 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=1098, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1104, PETRI_PLACES=297, PETRI_TRANSITIONS=280} [2022-11-18 19:50:52,244 INFO L288 CegarLoopForPetriNet]: 221 programPoint places, 76 predicate places. [2022-11-18 19:50:52,244 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 280 transitions, 1104 flow [2022-11-18 19:50:52,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 213.5) internal successors, (854), 4 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:52,245 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:50:52,245 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:50:52,264 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978acf84-9e95-4e4e-ad6e-44c8f413cb01/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 19:50:52,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978acf84-9e95-4e4e-ad6e-44c8f413cb01/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-18 19:50:52,451 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2022-11-18 19:50:52,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:50:52,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1729511929, now seen corresponding path program 1 times [2022-11-18 19:50:52,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:50:52,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364024355] [2022-11-18 19:50:52,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:50:52,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:50:52,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:52,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 19:50:52,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:50:52,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364024355] [2022-11-18 19:50:52,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364024355] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:50:52,731 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:50:52,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:50:52,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393234154] [2022-11-18 19:50:52,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:50:52,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 19:50:52,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:50:52,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 19:50:52,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:50:52,734 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 252 [2022-11-18 19:50:52,735 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 280 transitions, 1104 flow. Second operand has 3 states, 3 states have (on average 215.66666666666666) internal successors, (647), 3 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:52,735 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:50:52,735 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 252 [2022-11-18 19:50:52,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:50:55,053 INFO L130 PetriNetUnfolder]: 1073/7283 cut-off events. [2022-11-18 19:50:55,053 INFO L131 PetriNetUnfolder]: For 5954/6364 co-relation queries the response was YES. [2022-11-18 19:50:55,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14002 conditions, 7283 events. 1073/7283 cut-off events. For 5954/6364 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 74552 event pairs, 420 based on Foata normal form. 132/6246 useless extension candidates. Maximal degree in co-relation 13920. Up to 1816 conditions per place. [2022-11-18 19:50:55,114 INFO L137 encePairwiseOnDemand]: 248/252 looper letters, 16 selfloop transitions, 5 changer transitions 0/281 dead transitions. [2022-11-18 19:50:55,114 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 281 transitions, 1156 flow [2022-11-18 19:50:55,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 19:50:55,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 19:50:55,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 658 transitions. [2022-11-18 19:50:55,116 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8703703703703703 [2022-11-18 19:50:55,116 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 658 transitions. [2022-11-18 19:50:55,116 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 658 transitions. [2022-11-18 19:50:55,117 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:50:55,117 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 658 transitions. [2022-11-18 19:50:55,119 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 219.33333333333334) internal successors, (658), 3 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:55,120 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 252.0) internal successors, (1008), 4 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:55,121 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 252.0) internal successors, (1008), 4 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:55,121 INFO L175 Difference]: Start difference. First operand has 297 places, 280 transitions, 1104 flow. Second operand 3 states and 658 transitions. [2022-11-18 19:50:55,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 281 transitions, 1156 flow [2022-11-18 19:50:55,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 281 transitions, 1139 flow, removed 4 selfloop flow, removed 4 redundant places. [2022-11-18 19:50:55,142 INFO L231 Difference]: Finished difference. Result has 295 places, 279 transitions, 1111 flow [2022-11-18 19:50:55,143 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=1074, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1111, PETRI_PLACES=295, PETRI_TRANSITIONS=279} [2022-11-18 19:50:55,143 INFO L288 CegarLoopForPetriNet]: 221 programPoint places, 74 predicate places. [2022-11-18 19:50:55,144 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 279 transitions, 1111 flow [2022-11-18 19:50:55,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 215.66666666666666) internal successors, (647), 3 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:55,144 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:50:55,145 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:50:55,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-18 19:50:55,145 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2022-11-18 19:50:55,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:50:55,146 INFO L85 PathProgramCache]: Analyzing trace with hash -746036612, now seen corresponding path program 1 times [2022-11-18 19:50:55,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:50:55,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377343275] [2022-11-18 19:50:55,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:50:55,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:50:55,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:55,329 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-18 19:50:55,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:50:55,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377343275] [2022-11-18 19:50:55,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377343275] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:50:55,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888647351] [2022-11-18 19:50:55,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:50:55,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:50:55,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978acf84-9e95-4e4e-ad6e-44c8f413cb01/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:50:55,332 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978acf84-9e95-4e4e-ad6e-44c8f413cb01/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:50:55,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978acf84-9e95-4e4e-ad6e-44c8f413cb01/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 19:50:55,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:50:55,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-18 19:50:55,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:50:55,551 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-18 19:50:55,551 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:50:55,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888647351] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:50:55,551 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 19:50:55,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-18 19:50:55,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458878603] [2022-11-18 19:50:55,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:50:55,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 19:50:55,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:50:55,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 19:50:55,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-18 19:50:55,556 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 252 [2022-11-18 19:50:55,558 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 279 transitions, 1111 flow. Second operand has 6 states, 6 states have (on average 209.33333333333334) internal successors, (1256), 6 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:55,558 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:50:55,558 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 252 [2022-11-18 19:50:55,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:50:58,464 INFO L130 PetriNetUnfolder]: 4301/10817 cut-off events. [2022-11-18 19:50:58,464 INFO L131 PetriNetUnfolder]: For 17051/17051 co-relation queries the response was YES. [2022-11-18 19:50:58,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31193 conditions, 10817 events. 4301/10817 cut-off events. For 17051/17051 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 99293 event pairs, 110 based on Foata normal form. 142/10016 useless extension candidates. Maximal degree in co-relation 30929. Up to 2787 conditions per place. [2022-11-18 19:50:58,572 INFO L137 encePairwiseOnDemand]: 247/252 looper letters, 54 selfloop transitions, 12 changer transitions 0/309 dead transitions. [2022-11-18 19:50:58,572 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 309 transitions, 1374 flow [2022-11-18 19:50:58,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 19:50:58,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-18 19:50:58,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1502 transitions. [2022-11-18 19:50:58,576 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8514739229024944 [2022-11-18 19:50:58,577 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1502 transitions. [2022-11-18 19:50:58,577 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1502 transitions. [2022-11-18 19:50:58,578 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:50:58,578 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1502 transitions. [2022-11-18 19:50:58,583 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 214.57142857142858) internal successors, (1502), 7 states have internal predecessors, (1502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:58,586 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 252.0) internal successors, (2016), 8 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:58,587 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 252.0) internal successors, (2016), 8 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:58,588 INFO L175 Difference]: Start difference. First operand has 295 places, 279 transitions, 1111 flow. Second operand 7 states and 1502 transitions. [2022-11-18 19:50:58,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 309 transitions, 1374 flow [2022-11-18 19:50:58,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 309 transitions, 1337 flow, removed 15 selfloop flow, removed 2 redundant places. [2022-11-18 19:50:58,654 INFO L231 Difference]: Finished difference. Result has 298 places, 277 transitions, 1100 flow [2022-11-18 19:50:58,654 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=1076, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1100, PETRI_PLACES=298, PETRI_TRANSITIONS=277} [2022-11-18 19:50:58,655 INFO L288 CegarLoopForPetriNet]: 221 programPoint places, 77 predicate places. [2022-11-18 19:50:58,655 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 277 transitions, 1100 flow [2022-11-18 19:50:58,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 209.33333333333334) internal successors, (1256), 6 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:50:58,656 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:50:58,656 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:50:58,669 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978acf84-9e95-4e4e-ad6e-44c8f413cb01/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-18 19:50:58,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978acf84-9e95-4e4e-ad6e-44c8f413cb01/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-18 19:50:58,869 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2022-11-18 19:50:58,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:50:58,870 INFO L85 PathProgramCache]: Analyzing trace with hash 456594247, now seen corresponding path program 1 times [2022-11-18 19:50:58,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:50:58,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109227296] [2022-11-18 19:50:58,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:50:58,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:50:58,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:51:01,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:51:01,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:51:01,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109227296] [2022-11-18 19:51:01,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109227296] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:51:01,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498024542] [2022-11-18 19:51:01,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:51:01,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:51:01,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978acf84-9e95-4e4e-ad6e-44c8f413cb01/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:51:01,268 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978acf84-9e95-4e4e-ad6e-44c8f413cb01/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:51:01,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978acf84-9e95-4e4e-ad6e-44c8f413cb01/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 19:51:01,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:51:01,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-18 19:51:01,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:51:02,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-18 19:51:03,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:51:03,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-18 19:51:03,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:51:03,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-18 19:51:03,697 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-18 19:51:03,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-11-18 19:51:03,758 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:51:03,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:51:05,679 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:51:05,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2022-11-18 19:51:05,696 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:51:05,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 158 treesize of output 146 [2022-11-18 19:51:05,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 53 [2022-11-18 19:51:05,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 94 [2022-11-18 19:51:07,422 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:51:07,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498024542] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:51:07,423 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:51:07,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 55 [2022-11-18 19:51:07,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252219707] [2022-11-18 19:51:07,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:51:07,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-18 19:51:07,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:51:07,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-18 19:51:07,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=2828, Unknown=44, NotChecked=0, Total=3080 [2022-11-18 19:51:07,436 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 252 [2022-11-18 19:51:07,444 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 277 transitions, 1100 flow. Second operand has 56 states, 56 states have (on average 137.82142857142858) internal successors, (7718), 56 states have internal predecessors, (7718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:51:07,444 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:51:07,445 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 252 [2022-11-18 19:51:07,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:51:19,915 INFO L130 PetriNetUnfolder]: 10658/38181 cut-off events. [2022-11-18 19:51:19,915 INFO L131 PetriNetUnfolder]: For 24001/26513 co-relation queries the response was YES. [2022-11-18 19:51:20,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75688 conditions, 38181 events. 10658/38181 cut-off events. For 24001/26513 co-relation queries the response was YES. Maximal size of possible extension queue 790. Compared 480905 event pairs, 5482 based on Foata normal form. 728/32160 useless extension candidates. Maximal degree in co-relation 75341. Up to 13677 conditions per place. [2022-11-18 19:51:20,347 INFO L137 encePairwiseOnDemand]: 219/252 looper letters, 159 selfloop transitions, 83 changer transitions 12/376 dead transitions. [2022-11-18 19:51:20,347 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 376 transitions, 2093 flow [2022-11-18 19:51:20,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-18 19:51:20,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-11-18 19:51:20,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 5028 transitions. [2022-11-18 19:51:20,357 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5542328042328042 [2022-11-18 19:51:20,357 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 5028 transitions. [2022-11-18 19:51:20,357 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 5028 transitions. [2022-11-18 19:51:20,361 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:51:20,361 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 5028 transitions. [2022-11-18 19:51:20,372 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 139.66666666666666) internal successors, (5028), 36 states have internal predecessors, (5028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:51:20,385 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 252.0) internal successors, (9324), 37 states have internal predecessors, (9324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:51:20,388 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 252.0) internal successors, (9324), 37 states have internal predecessors, (9324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:51:20,388 INFO L175 Difference]: Start difference. First operand has 298 places, 277 transitions, 1100 flow. Second operand 36 states and 5028 transitions. [2022-11-18 19:51:20,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 376 transitions, 2093 flow [2022-11-18 19:51:20,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 376 transitions, 2067 flow, removed 2 selfloop flow, removed 6 redundant places. [2022-11-18 19:51:20,748 INFO L231 Difference]: Finished difference. Result has 337 places, 343 transitions, 1712 flow [2022-11-18 19:51:20,749 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=1074, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=1712, PETRI_PLACES=337, PETRI_TRANSITIONS=343} [2022-11-18 19:51:20,750 INFO L288 CegarLoopForPetriNet]: 221 programPoint places, 116 predicate places. [2022-11-18 19:51:20,751 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 343 transitions, 1712 flow [2022-11-18 19:51:20,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 137.82142857142858) internal successors, (7718), 56 states have internal predecessors, (7718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:51:20,753 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:51:20,753 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:51:20,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978acf84-9e95-4e4e-ad6e-44c8f413cb01/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-18 19:51:20,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978acf84-9e95-4e4e-ad6e-44c8f413cb01/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-18 19:51:20,955 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2022-11-18 19:51:20,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:51:20,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1349350837, now seen corresponding path program 2 times [2022-11-18 19:51:20,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:51:20,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401815859] [2022-11-18 19:51:20,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:51:20,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:51:21,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:51:25,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:51:25,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:51:25,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401815859] [2022-11-18 19:51:25,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401815859] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:51:25,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129427864] [2022-11-18 19:51:25,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:51:25,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:51:25,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978acf84-9e95-4e4e-ad6e-44c8f413cb01/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:51:25,144 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978acf84-9e95-4e4e-ad6e-44c8f413cb01/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:51:25,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978acf84-9e95-4e4e-ad6e-44c8f413cb01/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-18 19:51:25,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 19:51:25,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:51:25,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-18 19:51:25,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:51:26,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:51:26,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-18 19:51:26,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-11-18 19:51:26,644 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 19:51:26,644 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:51:26,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129427864] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:51:26,645 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 19:51:26,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [28] total 39 [2022-11-18 19:51:26,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416371922] [2022-11-18 19:51:26,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:51:26,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-18 19:51:26,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:51:26,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-18 19:51:26,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1439, Unknown=0, NotChecked=0, Total=1560 [2022-11-18 19:51:26,649 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 252 [2022-11-18 19:51:26,651 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 343 transitions, 1712 flow. Second operand has 13 states, 13 states have (on average 172.15384615384616) internal successors, (2238), 13 states have internal predecessors, (2238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:51:26,652 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:51:26,652 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 252 [2022-11-18 19:51:26,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:51:41,809 INFO L130 PetriNetUnfolder]: 15305/58576 cut-off events. [2022-11-18 19:51:41,809 INFO L131 PetriNetUnfolder]: For 62087/75552 co-relation queries the response was YES. [2022-11-18 19:51:42,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122776 conditions, 58576 events. 15305/58576 cut-off events. For 62087/75552 co-relation queries the response was YES. Maximal size of possible extension queue 1250. Compared 811438 event pairs, 3787 based on Foata normal form. 1712/51269 useless extension candidates. Maximal degree in co-relation 122450. Up to 16233 conditions per place. [2022-11-18 19:51:42,525 INFO L137 encePairwiseOnDemand]: 230/252 looper letters, 122 selfloop transitions, 63 changer transitions 0/401 dead transitions. [2022-11-18 19:51:42,525 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 401 transitions, 2394 flow [2022-11-18 19:51:42,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-18 19:51:42,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-18 19:51:42,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3141 transitions. [2022-11-18 19:51:42,532 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6924603174603174 [2022-11-18 19:51:42,533 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3141 transitions. [2022-11-18 19:51:42,533 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3141 transitions. [2022-11-18 19:51:42,535 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:51:42,536 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3141 transitions. [2022-11-18 19:51:42,542 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 174.5) internal successors, (3141), 18 states have internal predecessors, (3141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:51:42,548 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 252.0) internal successors, (4788), 19 states have internal predecessors, (4788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:51:42,550 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 252.0) internal successors, (4788), 19 states have internal predecessors, (4788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:51:42,550 INFO L175 Difference]: Start difference. First operand has 337 places, 343 transitions, 1712 flow. Second operand 18 states and 3141 transitions. [2022-11-18 19:51:42,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 401 transitions, 2394 flow [2022-11-18 19:51:42,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 401 transitions, 2305 flow, removed 26 selfloop flow, removed 11 redundant places. [2022-11-18 19:51:42,770 INFO L231 Difference]: Finished difference. Result has 346 places, 360 transitions, 1920 flow [2022-11-18 19:51:42,771 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=1631, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1920, PETRI_PLACES=346, PETRI_TRANSITIONS=360} [2022-11-18 19:51:42,772 INFO L288 CegarLoopForPetriNet]: 221 programPoint places, 125 predicate places. [2022-11-18 19:51:42,772 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 360 transitions, 1920 flow [2022-11-18 19:51:42,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 172.15384615384616) internal successors, (2238), 13 states have internal predecessors, (2238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:51:42,773 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:51:42,773 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:51:42,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978acf84-9e95-4e4e-ad6e-44c8f413cb01/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-18 19:51:42,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978acf84-9e95-4e4e-ad6e-44c8f413cb01/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-18 19:51:42,975 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2022-11-18 19:51:42,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:51:42,976 INFO L85 PathProgramCache]: Analyzing trace with hash 604335467, now seen corresponding path program 3 times [2022-11-18 19:51:42,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:51:42,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336964169] [2022-11-18 19:51:42,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:51:42,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:51:43,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:51:44,197 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:51:44,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:51:44,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336964169] [2022-11-18 19:51:44,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336964169] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:51:44,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610196995] [2022-11-18 19:51:44,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 19:51:44,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:51:44,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978acf84-9e95-4e4e-ad6e-44c8f413cb01/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:51:44,200 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978acf84-9e95-4e4e-ad6e-44c8f413cb01/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:51:44,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_978acf84-9e95-4e4e-ad6e-44c8f413cb01/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-18 19:51:44,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-18 19:51:44,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:51:44,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-18 19:51:44,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:51:45,210 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-18 19:51:45,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-11-18 19:51:45,247 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 19:51:45,248 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:51:45,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610196995] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:51:45,248 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 19:51:45,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [16] total 19 [2022-11-18 19:51:45,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10147140] [2022-11-18 19:51:45,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:51:45,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 19:51:45,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:51:45,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 19:51:45,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2022-11-18 19:51:45,255 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 252 [2022-11-18 19:51:45,256 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 360 transitions, 1920 flow. Second operand has 6 states, 6 states have (on average 194.5) internal successors, (1167), 6 states have internal predecessors, (1167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:51:45,257 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:51:45,257 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 252 [2022-11-18 19:51:45,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand