./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 2329fc70 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_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/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_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8 --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-2329fc7 [2022-12-13 17:52:20,412 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 17:52:20,413 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 17:52:20,433 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 17:52:20,433 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 17:52:20,434 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 17:52:20,436 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 17:52:20,437 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 17:52:20,439 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 17:52:20,440 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 17:52:20,441 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 17:52:20,442 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 17:52:20,442 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 17:52:20,443 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 17:52:20,444 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 17:52:20,446 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 17:52:20,446 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 17:52:20,447 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 17:52:20,448 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 17:52:20,449 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 17:52:20,450 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 17:52:20,451 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 17:52:20,452 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 17:52:20,452 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 17:52:20,455 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 17:52:20,455 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 17:52:20,455 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 17:52:20,456 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 17:52:20,456 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 17:52:20,457 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 17:52:20,457 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 17:52:20,458 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 17:52:20,458 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 17:52:20,459 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 17:52:20,459 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 17:52:20,460 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 17:52:20,460 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 17:52:20,460 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 17:52:20,460 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 17:52:20,461 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 17:52:20,461 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 17:52:20,462 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-12-13 17:52:20,481 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 17:52:20,482 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 17:52:20,482 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 17:52:20,482 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 17:52:20,483 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 17:52:20,483 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 17:52:20,484 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 17:52:20,484 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 17:52:20,484 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 17:52:20,484 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 17:52:20,485 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 17:52:20,485 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 17:52:20,485 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 17:52:20,485 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 17:52:20,485 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 17:52:20,486 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 17:52:20,486 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 17:52:20,486 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 17:52:20,486 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-12-13 17:52:20,486 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 17:52:20,487 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 17:52:20,487 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 17:52:20,487 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 17:52:20,487 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 17:52:20,487 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 17:52:20,487 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 17:52:20,488 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 17:52:20,488 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 17:52:20,488 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 17:52:20,488 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 17:52:20,488 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 17:52:20,489 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 17:52:20,489 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 17:52:20,489 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 17:52:20,489 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 17:52:20,489 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 17:52:20,489 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 17:52:20,490 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c6847e0a77224cc67de11826c53270ee36a6eb5754e5add0bb0a49165dff2879 [2022-12-13 17:52:20,711 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 17:52:20,727 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 17:52:20,729 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 17:52:20,730 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 17:52:20,731 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 17:52:20,732 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/popl20-more-queue-add-3-nl.wvr.c [2022-12-13 17:52:23,320 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 17:52:23,466 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 17:52:23,466 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/sv-benchmarks/c/weaver/popl20-more-queue-add-3-nl.wvr.c [2022-12-13 17:52:23,471 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/data/0e24b7471/2b25a2e00d36437cb2d231d004a5a2a3/FLAG64b42967e [2022-12-13 17:52:23,481 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/data/0e24b7471/2b25a2e00d36437cb2d231d004a5a2a3 [2022-12-13 17:52:23,483 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 17:52:23,484 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 17:52:23,485 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 17:52:23,485 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 17:52:23,488 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 17:52:23,489 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 05:52:23" (1/1) ... [2022-12-13 17:52:23,490 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c1e787b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:52:23, skipping insertion in model container [2022-12-13 17:52:23,490 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 05:52:23" (1/1) ... [2022-12-13 17:52:23,495 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 17:52:23,508 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 17:52:23,616 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:52:23,617 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:52:23,619 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:52:23,620 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:52:23,621 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:52:23,622 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:52:23,622 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:52:23,623 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:52:23,624 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:52:23,625 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:52:23,632 WARN L237 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_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/sv-benchmarks/c/weaver/popl20-more-queue-add-3-nl.wvr.c[3615,3628] [2022-12-13 17:52:23,637 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 17:52:23,644 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 17:52:23,654 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:52:23,655 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:52:23,655 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:52:23,656 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:52:23,656 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:52:23,657 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:52:23,657 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:52:23,658 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:52:23,659 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:52:23,660 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:52:23,665 WARN L237 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_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/sv-benchmarks/c/weaver/popl20-more-queue-add-3-nl.wvr.c[3615,3628] [2022-12-13 17:52:23,667 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 17:52:23,677 INFO L208 MainTranslator]: Completed translation [2022-12-13 17:52:23,678 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:52:23 WrapperNode [2022-12-13 17:52:23,678 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 17:52:23,679 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 17:52:23,679 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 17:52:23,679 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 17:52:23,684 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:52:23" (1/1) ... [2022-12-13 17:52:23,691 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:52:23" (1/1) ... [2022-12-13 17:52:23,710 INFO L138 Inliner]: procedures = 26, calls = 55, calls flagged for inlining = 16, calls inlined = 18, statements flattened = 277 [2022-12-13 17:52:23,711 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 17:52:23,711 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 17:52:23,711 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 17:52:23,711 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 17:52:23,719 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:52:23" (1/1) ... [2022-12-13 17:52:23,719 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:52:23" (1/1) ... [2022-12-13 17:52:23,721 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:52:23" (1/1) ... [2022-12-13 17:52:23,722 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:52:23" (1/1) ... [2022-12-13 17:52:23,727 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:52:23" (1/1) ... [2022-12-13 17:52:23,730 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:52:23" (1/1) ... [2022-12-13 17:52:23,731 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:52:23" (1/1) ... [2022-12-13 17:52:23,732 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:52:23" (1/1) ... [2022-12-13 17:52:23,734 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 17:52:23,735 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 17:52:23,735 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 17:52:23,735 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 17:52:23,736 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:52:23" (1/1) ... [2022-12-13 17:52:23,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 17:52:23,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:52:23,759 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 17:52:23,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 17:52:23,794 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 17:52:23,795 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 17:52:23,795 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 17:52:23,795 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 17:52:23,795 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 17:52:23,795 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 17:52:23,795 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 17:52:23,795 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 17:52:23,795 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-13 17:52:23,795 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-13 17:52:23,796 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 17:52:23,796 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-13 17:52:23,796 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-13 17:52:23,796 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 17:52:23,796 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 17:52:23,796 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 17:52:23,796 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 17:52:23,798 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 17:52:23,887 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 17:52:23,890 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 17:52:24,246 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 17:52:24,381 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 17:52:24,381 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-12-13 17:52:24,384 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 05:52:24 BoogieIcfgContainer [2022-12-13 17:52:24,384 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 17:52:24,387 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 17:52:24,387 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 17:52:24,389 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 17:52:24,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 05:52:23" (1/3) ... [2022-12-13 17:52:24,390 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27cf2089 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 05:52:24, skipping insertion in model container [2022-12-13 17:52:24,390 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:52:23" (2/3) ... [2022-12-13 17:52:24,390 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27cf2089 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 05:52:24, skipping insertion in model container [2022-12-13 17:52:24,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 05:52:24" (3/3) ... [2022-12-13 17:52:24,392 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-queue-add-3-nl.wvr.c [2022-12-13 17:52:24,399 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 17:52:24,407 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 17:52:24,407 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2022-12-13 17:52:24,407 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 17:52:24,474 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-13 17:52:24,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 244 places, 252 transitions, 528 flow [2022-12-13 17:52:24,584 INFO L130 PetriNetUnfolder]: 18/249 cut-off events. [2022-12-13 17:52:24,585 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 17:52:24,590 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 234 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. [2022-12-13 17:52:24,590 INFO L82 GeneralOperation]: Start removeDead. Operand has 244 places, 252 transitions, 528 flow [2022-12-13 17:52:24,595 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 221 places, 228 transitions, 471 flow [2022-12-13 17:52:24,598 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 17:52:24,608 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 221 places, 228 transitions, 471 flow [2022-12-13 17:52:24,610 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 221 places, 228 transitions, 471 flow [2022-12-13 17:52:24,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 221 places, 228 transitions, 471 flow [2022-12-13 17:52:24,653 INFO L130 PetriNetUnfolder]: 17/228 cut-off events. [2022-12-13 17:52:24,653 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 17:52:24,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 240 conditions, 228 events. 17/228 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 234 event pairs, 0 based on Foata normal form. 0/191 useless extension candidates. Maximal degree in co-relation 204. Up to 3 conditions per place. [2022-12-13 17:52:24,657 INFO L119 LiptonReduction]: Number of co-enabled transitions 3852 [2022-12-13 17:52:32,862 INFO L134 LiptonReduction]: Checked pairs total: 7278 [2022-12-13 17:52:32,862 INFO L136 LiptonReduction]: Total number of compositions: 250 [2022-12-13 17:52:32,874 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 17:52:32,879 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;@3d258e4e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 17:52:32,879 INFO L358 AbstractCegarLoop]: Starting to check reachability of 39 error locations. [2022-12-13 17:52:32,881 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2022-12-13 17:52:32,881 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 17:52:32,881 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:52:32,882 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 17:52:32,882 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2022-12-13 17:52:32,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:52:32,886 INFO L85 PathProgramCache]: Analyzing trace with hash 37132, now seen corresponding path program 1 times [2022-12-13 17:52:32,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:52:32,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61542818] [2022-12-13 17:52:32,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:52:32,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:52:32,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:52:33,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:52:33,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:52:33,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61542818] [2022-12-13 17:52:33,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61542818] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:52:33,069 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:52:33,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 17:52:33,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857265212] [2022-12-13 17:52:33,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:52:33,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:52:33,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:52:33,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:52:33,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:52:33,121 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 502 [2022-12-13 17:52:33,124 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 46 transitions, 107 flow. Second operand has 3 states, 3 states have (on average 211.66666666666666) internal successors, (635), 3 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:52:33,124 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:52:33,125 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 502 [2022-12-13 17:52:33,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:52:33,881 INFO L130 PetriNetUnfolder]: 5377/7199 cut-off events. [2022-12-13 17:52:33,881 INFO L131 PetriNetUnfolder]: For 322/322 co-relation queries the response was YES. [2022-12-13 17:52:33,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14765 conditions, 7199 events. 5377/7199 cut-off events. For 322/322 co-relation queries the response was YES. Maximal size of possible extension queue 606. Compared 36518 event pairs, 3536 based on Foata normal form. 0/2780 useless extension candidates. Maximal degree in co-relation 6685. Up to 3602 conditions per place. [2022-12-13 17:52:33,916 INFO L137 encePairwiseOnDemand]: 488/502 looper letters, 69 selfloop transitions, 4 changer transitions 0/74 dead transitions. [2022-12-13 17:52:33,916 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 74 transitions, 324 flow [2022-12-13 17:52:33,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:52:33,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:52:33,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 722 transitions. [2022-12-13 17:52:33,930 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47941567065073043 [2022-12-13 17:52:33,931 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 722 transitions. [2022-12-13 17:52:33,931 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 722 transitions. [2022-12-13 17:52:33,933 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:52:33,936 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 722 transitions. [2022-12-13 17:52:33,941 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 240.66666666666666) internal successors, (722), 3 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:52:33,947 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 502.0) internal successors, (2008), 4 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:52:33,948 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 502.0) internal successors, (2008), 4 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:52:33,950 INFO L175 Difference]: Start difference. First operand has 50 places, 46 transitions, 107 flow. Second operand 3 states and 722 transitions. [2022-12-13 17:52:33,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 74 transitions, 324 flow [2022-12-13 17:52:33,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 74 transitions, 306 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-12-13 17:52:33,960 INFO L231 Difference]: Finished difference. Result has 44 places, 43 transitions, 122 flow [2022-12-13 17:52:33,962 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=44, PETRI_TRANSITIONS=43} [2022-12-13 17:52:33,966 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, -6 predicate places. [2022-12-13 17:52:33,966 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 43 transitions, 122 flow [2022-12-13 17:52:33,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 211.66666666666666) internal successors, (635), 3 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:52:33,967 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:52:33,967 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 17:52:33,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 17:52:33,968 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2022-12-13 17:52:33,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:52:33,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1153130, now seen corresponding path program 1 times [2022-12-13 17:52:33,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:52:33,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923721086] [2022-12-13 17:52:33,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:52:33,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:52:33,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:52:34,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:52:34,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:52:34,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923721086] [2022-12-13 17:52:34,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923721086] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:52:34,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023862236] [2022-12-13 17:52:34,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:52:34,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:52:34,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:52:34,072 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:52:34,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 17:52:34,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:52:34,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 17:52:34,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:52:34,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:52:34,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:52:34,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:52:34,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023862236] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:52:34,175 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:52:34,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2022-12-13 17:52:34,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952748973] [2022-12-13 17:52:34,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:52:34,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 17:52:34,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:52:34,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 17:52:34,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 17:52:34,233 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 502 [2022-12-13 17:52:34,236 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 43 transitions, 122 flow. Second operand has 7 states, 7 states have (on average 212.14285714285714) internal successors, (1485), 7 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:52:34,236 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:52:34,236 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 502 [2022-12-13 17:52:34,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:52:36,083 INFO L130 PetriNetUnfolder]: 13447/17996 cut-off events. [2022-12-13 17:52:36,083 INFO L131 PetriNetUnfolder]: For 160/160 co-relation queries the response was YES. [2022-12-13 17:52:36,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36624 conditions, 17996 events. 13447/17996 cut-off events. For 160/160 co-relation queries the response was YES. Maximal size of possible extension queue 1223. Compared 101641 event pairs, 8840 based on Foata normal form. 0/6960 useless extension candidates. Maximal degree in co-relation 29255. Up to 3600 conditions per place. [2022-12-13 17:52:36,163 INFO L137 encePairwiseOnDemand]: 494/502 looper letters, 160 selfloop transitions, 21 changer transitions 0/182 dead transitions. [2022-12-13 17:52:36,163 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 182 transitions, 822 flow [2022-12-13 17:52:36,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 17:52:36,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 17:52:36,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1664 transitions. [2022-12-13 17:52:36,169 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4735344336937962 [2022-12-13 17:52:36,170 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1664 transitions. [2022-12-13 17:52:36,170 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1664 transitions. [2022-12-13 17:52:36,171 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:52:36,171 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1664 transitions. [2022-12-13 17:52:36,176 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 237.71428571428572) internal successors, (1664), 7 states have internal predecessors, (1664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:52:36,184 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 502.0) internal successors, (4016), 8 states have internal predecessors, (4016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:52:36,186 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 502.0) internal successors, (4016), 8 states have internal predecessors, (4016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:52:36,186 INFO L175 Difference]: Start difference. First operand has 44 places, 43 transitions, 122 flow. Second operand 7 states and 1664 transitions. [2022-12-13 17:52:36,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 182 transitions, 822 flow [2022-12-13 17:52:36,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 182 transitions, 808 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 17:52:36,190 INFO L231 Difference]: Finished difference. Result has 51 places, 58 transitions, 253 flow [2022-12-13 17:52:36,190 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=253, PETRI_PLACES=51, PETRI_TRANSITIONS=58} [2022-12-13 17:52:36,191 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, 1 predicate places. [2022-12-13 17:52:36,191 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 58 transitions, 253 flow [2022-12-13 17:52:36,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 212.14285714285714) internal successors, (1485), 7 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:52:36,192 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:52:36,192 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1] [2022-12-13 17:52:36,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 17:52:36,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:52:36,393 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2022-12-13 17:52:36,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:52:36,394 INFO L85 PathProgramCache]: Analyzing trace with hash 35748140, now seen corresponding path program 1 times [2022-12-13 17:52:36,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:52:36,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354572298] [2022-12-13 17:52:36,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:52:36,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:52:36,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:52:36,490 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:52:36,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:52:36,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354572298] [2022-12-13 17:52:36,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354572298] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:52:36,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361041679] [2022-12-13 17:52:36,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:52:36,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:52:36,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:52:36,492 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:52:36,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 17:52:36,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:52:36,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 17:52:36,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:52:36,576 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:52:36,577 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 17:52:36,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361041679] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:52:36,577 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 17:52:36,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2022-12-13 17:52:36,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130946112] [2022-12-13 17:52:36,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:52:36,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 17:52:36,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:52:36,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 17:52:36,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-13 17:52:36,612 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 502 [2022-12-13 17:52:36,615 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 58 transitions, 253 flow. Second operand has 5 states, 5 states have (on average 211.8) internal successors, (1059), 5 states have internal predecessors, (1059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:52:36,615 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:52:36,615 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 502 [2022-12-13 17:52:36,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:52:38,379 INFO L130 PetriNetUnfolder]: 13441/17988 cut-off events. [2022-12-13 17:52:38,379 INFO L131 PetriNetUnfolder]: For 163/163 co-relation queries the response was YES. [2022-12-13 17:52:38,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36626 conditions, 17988 events. 13441/17988 cut-off events. For 163/163 co-relation queries the response was YES. Maximal size of possible extension queue 1223. Compared 101380 event pairs, 8840 based on Foata normal form. 2/6962 useless extension candidates. Maximal degree in co-relation 21956. Up to 10789 conditions per place. [2022-12-13 17:52:38,446 INFO L137 encePairwiseOnDemand]: 496/502 looper letters, 102 selfloop transitions, 9 changer transitions 0/112 dead transitions. [2022-12-13 17:52:38,446 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 112 transitions, 557 flow [2022-12-13 17:52:38,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 17:52:38,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 17:52:38,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1164 transitions. [2022-12-13 17:52:38,449 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46374501992031875 [2022-12-13 17:52:38,449 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1164 transitions. [2022-12-13 17:52:38,450 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1164 transitions. [2022-12-13 17:52:38,451 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:52:38,451 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1164 transitions. [2022-12-13 17:52:38,454 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 232.8) internal successors, (1164), 5 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:52:38,458 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 502.0) internal successors, (3012), 6 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:52:38,459 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 502.0) internal successors, (3012), 6 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:52:38,459 INFO L175 Difference]: Start difference. First operand has 51 places, 58 transitions, 253 flow. Second operand 5 states and 1164 transitions. [2022-12-13 17:52:38,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 112 transitions, 557 flow [2022-12-13 17:52:38,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 112 transitions, 538 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-12-13 17:52:38,463 INFO L231 Difference]: Finished difference. Result has 51 places, 50 transitions, 198 flow [2022-12-13 17:52:38,463 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=198, PETRI_PLACES=51, PETRI_TRANSITIONS=50} [2022-12-13 17:52:38,464 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, 1 predicate places. [2022-12-13 17:52:38,464 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 50 transitions, 198 flow [2022-12-13 17:52:38,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 211.8) internal successors, (1059), 5 states have internal predecessors, (1059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:52:38,465 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:52:38,465 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-12-13 17:52:38,471 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 17:52:38,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:52:38,667 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2022-12-13 17:52:38,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:52:38,669 INFO L85 PathProgramCache]: Analyzing trace with hash -5711511, now seen corresponding path program 2 times [2022-12-13 17:52:38,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:52:38,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152243935] [2022-12-13 17:52:38,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:52:38,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:52:38,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:52:38,794 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:52:38,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:52:38,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152243935] [2022-12-13 17:52:38,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152243935] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:52:38,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519465343] [2022-12-13 17:52:38,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:52:38,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:52:38,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:52:38,796 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:52:38,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 17:52:38,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 17:52:38,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:52:38,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 17:52:38,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:52:38,868 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 17:52:38,868 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 17:52:38,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519465343] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:52:38,868 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 17:52:38,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2022-12-13 17:52:38,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3943614] [2022-12-13 17:52:38,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:52:38,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:52:38,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:52:38,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:52:38,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-12-13 17:52:38,886 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 502 [2022-12-13 17:52:38,886 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 50 transitions, 198 flow. Second operand has 3 states, 3 states have (on average 214.0) internal successors, (642), 3 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:52:38,886 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:52:38,886 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 502 [2022-12-13 17:52:38,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:52:40,264 INFO L130 PetriNetUnfolder]: 13441/17987 cut-off events. [2022-12-13 17:52:40,264 INFO L131 PetriNetUnfolder]: For 169/169 co-relation queries the response was YES. [2022-12-13 17:52:40,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36619 conditions, 17987 events. 13441/17987 cut-off events. For 169/169 co-relation queries the response was YES. Maximal size of possible extension queue 1399. Compared 102709 event pairs, 8840 based on Foata normal form. 1/6958 useless extension candidates. Maximal degree in co-relation 29241. Up to 17977 conditions per place. [2022-12-13 17:52:40,313 INFO L137 encePairwiseOnDemand]: 499/502 looper letters, 42 selfloop transitions, 6 changer transitions 0/49 dead transitions. [2022-12-13 17:52:40,313 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 49 transitions, 284 flow [2022-12-13 17:52:40,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:52:40,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:52:40,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 676 transitions. [2022-12-13 17:52:40,315 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.448871181938911 [2022-12-13 17:52:40,315 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 676 transitions. [2022-12-13 17:52:40,315 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 676 transitions. [2022-12-13 17:52:40,316 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:52:40,316 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 676 transitions. [2022-12-13 17:52:40,317 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 225.33333333333334) internal successors, (676), 3 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:52:40,318 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 502.0) internal successors, (2008), 4 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:52:40,319 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 502.0) internal successors, (2008), 4 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:52:40,319 INFO L175 Difference]: Start difference. First operand has 51 places, 50 transitions, 198 flow. Second operand 3 states and 676 transitions. [2022-12-13 17:52:40,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 49 transitions, 284 flow [2022-12-13 17:52:40,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 49 transitions, 271 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 17:52:40,320 INFO L231 Difference]: Finished difference. Result has 49 places, 49 transitions, 187 flow [2022-12-13 17:52:40,320 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=175, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=187, PETRI_PLACES=49, PETRI_TRANSITIONS=49} [2022-12-13 17:52:40,321 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, -1 predicate places. [2022-12-13 17:52:40,321 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 49 transitions, 187 flow [2022-12-13 17:52:40,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 214.0) internal successors, (642), 3 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:52:40,321 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:52:40,321 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 17:52:40,326 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-13 17:52:40,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:52:40,522 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2022-12-13 17:52:40,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:52:40,522 INFO L85 PathProgramCache]: Analyzing trace with hash 10918077, now seen corresponding path program 1 times [2022-12-13 17:52:40,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:52:40,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820742434] [2022-12-13 17:52:40,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:52:40,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:52:40,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:52:40,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:52:40,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:52:40,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820742434] [2022-12-13 17:52:40,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820742434] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:52:40,564 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:52:40,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 17:52:40,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361593318] [2022-12-13 17:52:40,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:52:40,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:52:40,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:52:40,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:52:40,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:52:40,571 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 502 [2022-12-13 17:52:40,572 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 49 transitions, 187 flow. Second operand has 3 states, 3 states have (on average 217.0) internal successors, (651), 3 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:52:40,572 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:52:40,573 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 502 [2022-12-13 17:52:40,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:52:42,722 INFO L130 PetriNetUnfolder]: 17121/24487 cut-off events. [2022-12-13 17:52:42,722 INFO L131 PetriNetUnfolder]: For 170/170 co-relation queries the response was YES. [2022-12-13 17:52:42,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49963 conditions, 24487 events. 17121/24487 cut-off events. For 170/170 co-relation queries the response was YES. Maximal size of possible extension queue 1240. Compared 153006 event pairs, 8845 based on Foata normal form. 0/11237 useless extension candidates. Maximal degree in co-relation 49907. Up to 15168 conditions per place. [2022-12-13 17:52:42,799 INFO L137 encePairwiseOnDemand]: 498/502 looper letters, 74 selfloop transitions, 2 changer transitions 0/76 dead transitions. [2022-12-13 17:52:42,799 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 76 transitions, 398 flow [2022-12-13 17:52:42,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:52:42,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:52:42,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 711 transitions. [2022-12-13 17:52:42,801 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4721115537848606 [2022-12-13 17:52:42,801 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 711 transitions. [2022-12-13 17:52:42,801 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 711 transitions. [2022-12-13 17:52:42,802 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:52:42,802 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 711 transitions. [2022-12-13 17:52:42,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 237.0) internal successors, (711), 3 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:52:42,805 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 502.0) internal successors, (2008), 4 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:52:42,805 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 502.0) internal successors, (2008), 4 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:52:42,805 INFO L175 Difference]: Start difference. First operand has 49 places, 49 transitions, 187 flow. Second operand 3 states and 711 transitions. [2022-12-13 17:52:42,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 76 transitions, 398 flow [2022-12-13 17:52:42,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 76 transitions, 386 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 17:52:42,807 INFO L231 Difference]: Finished difference. Result has 50 places, 50 transitions, 189 flow [2022-12-13 17:52:42,807 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=175, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=189, PETRI_PLACES=50, PETRI_TRANSITIONS=50} [2022-12-13 17:52:42,808 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, 0 predicate places. [2022-12-13 17:52:42,808 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 50 transitions, 189 flow [2022-12-13 17:52:42,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 217.0) internal successors, (651), 3 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:52:42,808 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:52:42,808 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 17:52:42,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 17:52:42,809 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2022-12-13 17:52:42,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:52:42,809 INFO L85 PathProgramCache]: Analyzing trace with hash 10917889, now seen corresponding path program 1 times [2022-12-13 17:52:42,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:52:42,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525111095] [2022-12-13 17:52:42,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:52:42,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:52:42,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:52:42,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:52:42,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:52:42,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525111095] [2022-12-13 17:52:42,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525111095] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:52:42,868 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:52:42,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 17:52:42,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367234428] [2022-12-13 17:52:42,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:52:42,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 17:52:42,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:52:42,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 17:52:42,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 17:52:42,905 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 502 [2022-12-13 17:52:42,906 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 50 transitions, 189 flow. Second operand has 4 states, 4 states have (on average 208.25) internal successors, (833), 4 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:52:42,906 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:52:42,906 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 502 [2022-12-13 17:52:42,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:52:44,643 INFO L130 PetriNetUnfolder]: 15886/22853 cut-off events. [2022-12-13 17:52:44,643 INFO L131 PetriNetUnfolder]: For 1613/2323 co-relation queries the response was YES. [2022-12-13 17:52:44,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49500 conditions, 22853 events. 15886/22853 cut-off events. For 1613/2323 co-relation queries the response was YES. Maximal size of possible extension queue 1398. Compared 145875 event pairs, 13490 based on Foata normal form. 1080/12413 useless extension candidates. Maximal degree in co-relation 39033. Up to 22546 conditions per place. [2022-12-13 17:52:44,718 INFO L137 encePairwiseOnDemand]: 492/502 looper letters, 77 selfloop transitions, 4 changer transitions 2/84 dead transitions. [2022-12-13 17:52:44,718 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 84 transitions, 459 flow [2022-12-13 17:52:44,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 17:52:44,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 17:52:44,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1116 transitions. [2022-12-13 17:52:44,721 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4446215139442231 [2022-12-13 17:52:44,721 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1116 transitions. [2022-12-13 17:52:44,721 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1116 transitions. [2022-12-13 17:52:44,721 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:52:44,721 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1116 transitions. [2022-12-13 17:52:44,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 223.2) internal successors, (1116), 5 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:52:44,724 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 502.0) internal successors, (3012), 6 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:52:44,725 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 502.0) internal successors, (3012), 6 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:52:44,725 INFO L175 Difference]: Start difference. First operand has 50 places, 50 transitions, 189 flow. Second operand 5 states and 1116 transitions. [2022-12-13 17:52:44,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 84 transitions, 459 flow [2022-12-13 17:52:44,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 84 transitions, 457 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 17:52:44,727 INFO L231 Difference]: Finished difference. Result has 55 places, 51 transitions, 230 flow [2022-12-13 17:52:44,727 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=230, PETRI_PLACES=55, PETRI_TRANSITIONS=51} [2022-12-13 17:52:44,727 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, 5 predicate places. [2022-12-13 17:52:44,727 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 51 transitions, 230 flow [2022-12-13 17:52:44,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 208.25) internal successors, (833), 4 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:52:44,728 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:52:44,728 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2022-12-13 17:52:44,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 17:52:44,728 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2022-12-13 17:52:44,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:52:44,728 INFO L85 PathProgramCache]: Analyzing trace with hash 349720651, now seen corresponding path program 1 times [2022-12-13 17:52:44,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:52:44,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440547290] [2022-12-13 17:52:44,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:52:44,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:52:44,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:52:44,795 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:52:44,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:52:44,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440547290] [2022-12-13 17:52:44,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440547290] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:52:44,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142622159] [2022-12-13 17:52:44,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:52:44,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:52:44,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:52:44,797 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:52:44,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 17:52:44,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:52:44,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 17:52:44,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:52:44,885 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:52:44,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:52:44,938 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:52:44,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142622159] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:52:44,939 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:52:44,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-12-13 17:52:44,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121863739] [2022-12-13 17:52:44,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:52:44,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 17:52:44,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:52:44,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 17:52:44,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-12-13 17:52:45,015 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 502 [2022-12-13 17:52:45,017 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 51 transitions, 230 flow. Second operand has 13 states, 13 states have (on average 212.15384615384616) internal successors, (2758), 13 states have internal predecessors, (2758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:52:45,017 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:52:45,017 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 502 [2022-12-13 17:52:45,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:52:49,780 INFO L130 PetriNetUnfolder]: 34948/50273 cut-off events. [2022-12-13 17:52:49,780 INFO L131 PetriNetUnfolder]: For 21657/23217 co-relation queries the response was YES. [2022-12-13 17:52:49,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132390 conditions, 50273 events. 34948/50273 cut-off events. For 21657/23217 co-relation queries the response was YES. Maximal size of possible extension queue 1771. Compared 340070 event pairs, 29678 based on Foata normal form. 1572/26499 useless extension candidates. Maximal degree in co-relation 130949. Up to 12389 conditions per place. [2022-12-13 17:52:49,990 INFO L137 encePairwiseOnDemand]: 497/502 looper letters, 356 selfloop transitions, 32 changer transitions 0/389 dead transitions. [2022-12-13 17:52:49,991 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 389 transitions, 2134 flow [2022-12-13 17:52:49,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 17:52:49,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 17:52:49,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2914 transitions. [2022-12-13 17:52:49,995 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48373173970783534 [2022-12-13 17:52:49,995 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2914 transitions. [2022-12-13 17:52:49,995 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2914 transitions. [2022-12-13 17:52:49,996 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:52:49,996 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2914 transitions. [2022-12-13 17:52:49,999 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 242.83333333333334) internal successors, (2914), 12 states have internal predecessors, (2914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:52:50,004 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 502.0) internal successors, (6526), 13 states have internal predecessors, (6526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:52:50,006 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 502.0) internal successors, (6526), 13 states have internal predecessors, (6526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:52:50,006 INFO L175 Difference]: Start difference. First operand has 55 places, 51 transitions, 230 flow. Second operand 12 states and 2914 transitions. [2022-12-13 17:52:50,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 389 transitions, 2134 flow [2022-12-13 17:52:50,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 389 transitions, 2128 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-12-13 17:52:50,012 INFO L231 Difference]: Finished difference. Result has 71 places, 69 transitions, 442 flow [2022-12-13 17:52:50,012 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=442, PETRI_PLACES=71, PETRI_TRANSITIONS=69} [2022-12-13 17:52:50,013 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, 21 predicate places. [2022-12-13 17:52:50,013 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 69 transitions, 442 flow [2022-12-13 17:52:50,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 212.15384615384616) internal successors, (2758), 13 states have internal predecessors, (2758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:52:50,014 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:52:50,014 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:52:50,019 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 17:52:50,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:52:50,215 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2022-12-13 17:52:50,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:52:50,216 INFO L85 PathProgramCache]: Analyzing trace with hash -160426302, now seen corresponding path program 1 times [2022-12-13 17:52:50,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:52:50,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711783972] [2022-12-13 17:52:50,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:52:50,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:52:50,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:52:50,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:52:50,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:52:50,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711783972] [2022-12-13 17:52:50,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711783972] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:52:50,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123403983] [2022-12-13 17:52:50,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:52:50,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:52:50,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:52:50,324 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:52:50,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 17:52:50,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:52:50,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 17:52:50,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:52:50,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:52:50,401 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 17:52:50,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123403983] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:52:50,401 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 17:52:50,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2022-12-13 17:52:50,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311992471] [2022-12-13 17:52:50,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:52:50,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:52:50,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:52:50,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:52:50,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-13 17:52:50,406 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 502 [2022-12-13 17:52:50,407 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 69 transitions, 442 flow. Second operand has 3 states, 3 states have (on average 217.0) internal successors, (651), 3 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:52:50,407 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:52:50,407 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 502 [2022-12-13 17:52:50,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:52:52,961 INFO L130 PetriNetUnfolder]: 20120/29241 cut-off events. [2022-12-13 17:52:52,961 INFO L131 PetriNetUnfolder]: For 18163/19549 co-relation queries the response was YES. [2022-12-13 17:52:53,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73117 conditions, 29241 events. 20120/29241 cut-off events. For 18163/19549 co-relation queries the response was YES. Maximal size of possible extension queue 1072. Compared 185981 event pairs, 16500 based on Foata normal form. 1386/18373 useless extension candidates. Maximal degree in co-relation 59774. Up to 29219 conditions per place. [2022-12-13 17:52:53,080 INFO L137 encePairwiseOnDemand]: 498/502 looper letters, 64 selfloop transitions, 1 changer transitions 0/66 dead transitions. [2022-12-13 17:52:53,080 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 66 transitions, 554 flow [2022-12-13 17:52:53,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:52:53,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:52:53,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 681 transitions. [2022-12-13 17:52:53,082 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45219123505976094 [2022-12-13 17:52:53,082 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 681 transitions. [2022-12-13 17:52:53,082 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 681 transitions. [2022-12-13 17:52:53,082 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:52:53,083 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 681 transitions. [2022-12-13 17:52:53,083 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 227.0) internal successors, (681), 3 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:52:53,085 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 502.0) internal successors, (2008), 4 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:52:53,085 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 502.0) internal successors, (2008), 4 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:52:53,085 INFO L175 Difference]: Start difference. First operand has 71 places, 69 transitions, 442 flow. Second operand 3 states and 681 transitions. [2022-12-13 17:52:53,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 66 transitions, 554 flow [2022-12-13 17:52:53,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 66 transitions, 462 flow, removed 26 selfloop flow, removed 5 redundant places. [2022-12-13 17:52:53,089 INFO L231 Difference]: Finished difference. Result has 65 places, 66 transitions, 334 flow [2022-12-13 17:52:53,090 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=334, PETRI_PLACES=65, PETRI_TRANSITIONS=66} [2022-12-13 17:52:53,090 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, 15 predicate places. [2022-12-13 17:52:53,090 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 66 transitions, 334 flow [2022-12-13 17:52:53,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 217.0) internal successors, (651), 3 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:52:53,091 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:52:53,091 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:52:53,096 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 17:52:53,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-12-13 17:52:53,293 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2022-12-13 17:52:53,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:52:53,294 INFO L85 PathProgramCache]: Analyzing trace with hash -678241120, now seen corresponding path program 1 times [2022-12-13 17:52:53,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:52:53,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045410793] [2022-12-13 17:52:53,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:52:53,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:52:53,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:52:53,366 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:52:53,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:52:53,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045410793] [2022-12-13 17:52:53,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045410793] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:52:53,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185452069] [2022-12-13 17:52:53,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:52:53,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:52:53,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:52:53,368 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:52:53,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 17:52:53,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:52:53,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 17:52:53,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:52:53,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:52:53,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:52:53,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:52:53,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185452069] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:52:53,536 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:52:53,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 10 [2022-12-13 17:52:53,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957084887] [2022-12-13 17:52:53,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:52:53,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 17:52:53,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:52:53,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 17:52:53,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-12-13 17:52:53,690 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 502 [2022-12-13 17:52:53,691 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 66 transitions, 334 flow. Second operand has 11 states, 11 states have (on average 200.9090909090909) internal successors, (2210), 11 states have internal predecessors, (2210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:52:53,691 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:52:53,691 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 502 [2022-12-13 17:52:53,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:52:59,667 INFO L130 PetriNetUnfolder]: 42241/61813 cut-off events. [2022-12-13 17:52:59,667 INFO L131 PetriNetUnfolder]: For 25663/25663 co-relation queries the response was YES. [2022-12-13 17:52:59,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151533 conditions, 61813 events. 42241/61813 cut-off events. For 25663/25663 co-relation queries the response was YES. Maximal size of possible extension queue 1825. Compared 437510 event pairs, 11077 based on Foata normal form. 4048/41089 useless extension candidates. Maximal degree in co-relation 151511. Up to 18049 conditions per place. [2022-12-13 17:52:59,989 INFO L137 encePairwiseOnDemand]: 491/502 looper letters, 278 selfloop transitions, 21 changer transitions 6/305 dead transitions. [2022-12-13 17:52:59,989 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 305 transitions, 1656 flow [2022-12-13 17:52:59,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-13 17:52:59,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-12-13 17:52:59,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3850 transitions. [2022-12-13 17:52:59,995 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4260734838424081 [2022-12-13 17:52:59,995 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3850 transitions. [2022-12-13 17:52:59,996 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3850 transitions. [2022-12-13 17:52:59,997 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:52:59,997 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3850 transitions. [2022-12-13 17:53:00,002 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 213.88888888888889) internal successors, (3850), 18 states have internal predecessors, (3850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:53:00,009 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 502.0) internal successors, (9538), 19 states have internal predecessors, (9538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:53:00,011 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 502.0) internal successors, (9538), 19 states have internal predecessors, (9538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:53:00,011 INFO L175 Difference]: Start difference. First operand has 65 places, 66 transitions, 334 flow. Second operand 18 states and 3850 transitions. [2022-12-13 17:53:00,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 305 transitions, 1656 flow [2022-12-13 17:53:00,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 305 transitions, 1655 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 17:53:00,037 INFO L231 Difference]: Finished difference. Result has 88 places, 79 transitions, 507 flow [2022-12-13 17:53:00,037 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=333, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=507, PETRI_PLACES=88, PETRI_TRANSITIONS=79} [2022-12-13 17:53:00,038 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, 38 predicate places. [2022-12-13 17:53:00,038 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 79 transitions, 507 flow [2022-12-13 17:53:00,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 200.9090909090909) internal successors, (2210), 11 states have internal predecessors, (2210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:53:00,039 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:53:00,039 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:53:00,043 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 17:53:00,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-12-13 17:53:00,241 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2022-12-13 17:53:00,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:53:00,242 INFO L85 PathProgramCache]: Analyzing trace with hash -2131251424, now seen corresponding path program 1 times [2022-12-13 17:53:00,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:53:00,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489677022] [2022-12-13 17:53:00,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:53:00,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:53:00,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:53:00,318 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 17:53:00,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:53:00,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489677022] [2022-12-13 17:53:00,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489677022] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:53:00,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443800206] [2022-12-13 17:53:00,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:53:00,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:53:00,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:53:00,320 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:53:00,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 17:53:00,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:53:00,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 17:53:00,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:53:00,394 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 17:53:00,394 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 17:53:00,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443800206] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:53:00,394 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 17:53:00,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2022-12-13 17:53:00,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128146218] [2022-12-13 17:53:00,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:53:00,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 17:53:00,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:53:00,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 17:53:00,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:53:00,403 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 502 [2022-12-13 17:53:00,404 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 79 transitions, 507 flow. Second operand has 4 states, 4 states have (on average 217.0) internal successors, (868), 4 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:53:00,404 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:53:00,404 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 502 [2022-12-13 17:53:00,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:53:05,633 INFO L130 PetriNetUnfolder]: 38501/56973 cut-off events. [2022-12-13 17:53:05,633 INFO L131 PetriNetUnfolder]: For 59996/59996 co-relation queries the response was YES. [2022-12-13 17:53:05,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167633 conditions, 56973 events. 38501/56973 cut-off events. For 59996/59996 co-relation queries the response was YES. Maximal size of possible extension queue 1719. Compared 407835 event pairs, 3597 based on Foata normal form. 2200/37833 useless extension candidates. Maximal degree in co-relation 167603. Up to 28842 conditions per place. [2022-12-13 17:53:05,916 INFO L137 encePairwiseOnDemand]: 499/502 looper letters, 110 selfloop transitions, 8 changer transitions 0/118 dead transitions. [2022-12-13 17:53:05,916 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 118 transitions, 843 flow [2022-12-13 17:53:05,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 17:53:05,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 17:53:05,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 936 transitions. [2022-12-13 17:53:05,919 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46613545816733065 [2022-12-13 17:53:05,919 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 936 transitions. [2022-12-13 17:53:05,919 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 936 transitions. [2022-12-13 17:53:05,919 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:53:05,919 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 936 transitions. [2022-12-13 17:53:05,921 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:53:05,922 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 502.0) internal successors, (2510), 5 states have internal predecessors, (2510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:53:05,923 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 502.0) internal successors, (2510), 5 states have internal predecessors, (2510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:53:05,923 INFO L175 Difference]: Start difference. First operand has 88 places, 79 transitions, 507 flow. Second operand 4 states and 936 transitions. [2022-12-13 17:53:05,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 118 transitions, 843 flow [2022-12-13 17:53:07,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 118 transitions, 810 flow, removed 10 selfloop flow, removed 3 redundant places. [2022-12-13 17:53:07,061 INFO L231 Difference]: Finished difference. Result has 87 places, 77 transitions, 474 flow [2022-12-13 17:53:07,062 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=458, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=474, PETRI_PLACES=87, PETRI_TRANSITIONS=77} [2022-12-13 17:53:07,062 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, 37 predicate places. [2022-12-13 17:53:07,062 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 77 transitions, 474 flow [2022-12-13 17:53:07,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 217.0) internal successors, (868), 4 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:53:07,062 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:53:07,062 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:53:07,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-13 17:53:07,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:53:07,264 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread3Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2022-12-13 17:53:07,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:53:07,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1107415861, now seen corresponding path program 1 times [2022-12-13 17:53:07,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:53:07,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018629845] [2022-12-13 17:53:07,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:53:07,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:53:07,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:53:07,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:53:07,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:53:07,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018629845] [2022-12-13 17:53:07,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018629845] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:53:07,322 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:53:07,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 17:53:07,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825214002] [2022-12-13 17:53:07,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:53:07,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:53:07,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:53:07,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:53:07,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:53:07,327 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 502 [2022-12-13 17:53:07,327 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 77 transitions, 474 flow. Second operand has 3 states, 3 states have (on average 216.33333333333334) internal successors, (649), 3 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:53:07,327 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:53:07,328 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 502 [2022-12-13 17:53:07,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:53:12,711 INFO L130 PetriNetUnfolder]: 36939/54762 cut-off events. [2022-12-13 17:53:12,711 INFO L131 PetriNetUnfolder]: For 113868/115519 co-relation queries the response was YES. [2022-12-13 17:53:12,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159352 conditions, 54762 events. 36939/54762 cut-off events. For 113868/115519 co-relation queries the response was YES. Maximal size of possible extension queue 1882. Compared 389821 event pairs, 8107 based on Foata normal form. 2971/35711 useless extension candidates. Maximal degree in co-relation 159322. Up to 45321 conditions per place. [2022-12-13 17:53:13,021 INFO L137 encePairwiseOnDemand]: 492/502 looper letters, 83 selfloop transitions, 5 changer transitions 3/94 dead transitions. [2022-12-13 17:53:13,021 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 94 transitions, 731 flow [2022-12-13 17:53:13,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:53:13,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:53:13,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 691 transitions. [2022-12-13 17:53:13,023 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4588313413014608 [2022-12-13 17:53:13,023 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 691 transitions. [2022-12-13 17:53:13,023 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 691 transitions. [2022-12-13 17:53:13,024 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:53:13,024 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 691 transitions. [2022-12-13 17:53:13,025 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 230.33333333333334) internal successors, (691), 3 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:53:13,026 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 502.0) internal successors, (2008), 4 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:53:13,026 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 502.0) internal successors, (2008), 4 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:53:13,026 INFO L175 Difference]: Start difference. First operand has 87 places, 77 transitions, 474 flow. Second operand 3 states and 691 transitions. [2022-12-13 17:53:13,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 94 transitions, 731 flow [2022-12-13 17:53:13,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 94 transitions, 716 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 17:53:13,110 INFO L231 Difference]: Finished difference. Result has 88 places, 78 transitions, 485 flow [2022-12-13 17:53:13,110 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=460, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=485, PETRI_PLACES=88, PETRI_TRANSITIONS=78} [2022-12-13 17:53:13,110 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, 38 predicate places. [2022-12-13 17:53:13,110 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 78 transitions, 485 flow [2022-12-13 17:53:13,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 216.33333333333334) internal successors, (649), 3 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:53:13,110 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:53:13,111 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2022-12-13 17:53:13,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-13 17:53:13,111 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2022-12-13 17:53:13,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:53:13,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1644283555, now seen corresponding path program 2 times [2022-12-13 17:53:13,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:53:13,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299249721] [2022-12-13 17:53:13,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:53:13,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:53:13,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:53:13,164 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 17:53:13,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:53:13,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299249721] [2022-12-13 17:53:13,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299249721] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:53:13,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35821615] [2022-12-13 17:53:13,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:53:13,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:53:13,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:53:13,166 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:53:13,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 17:53:13,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 17:53:13,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:53:13,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 17:53:13,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:53:13,251 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 17:53:13,251 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 17:53:13,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35821615] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:53:13,251 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 17:53:13,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4] total 5 [2022-12-13 17:53:13,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892716838] [2022-12-13 17:53:13,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:53:13,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:53:13,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:53:13,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:53:13,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-13 17:53:13,259 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 502 [2022-12-13 17:53:13,259 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 78 transitions, 485 flow. Second operand has 3 states, 3 states have (on average 217.33333333333334) internal successors, (652), 3 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:53:13,260 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:53:13,260 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 502 [2022-12-13 17:53:13,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:53:18,150 INFO L130 PetriNetUnfolder]: 33947/50549 cut-off events. [2022-12-13 17:53:18,150 INFO L131 PetriNetUnfolder]: For 107153/108671 co-relation queries the response was YES. [2022-12-13 17:53:18,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170727 conditions, 50549 events. 33947/50549 cut-off events. For 107153/108671 co-relation queries the response was YES. Maximal size of possible extension queue 1761. Compared 358042 event pairs, 22451 based on Foata normal form. 1518/35567 useless extension candidates. Maximal degree in co-relation 170695. Up to 50461 conditions per place. [2022-12-13 17:53:18,456 INFO L137 encePairwiseOnDemand]: 500/502 looper letters, 73 selfloop transitions, 1 changer transitions 0/77 dead transitions. [2022-12-13 17:53:18,456 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 77 transitions, 625 flow [2022-12-13 17:53:18,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:53:18,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:53:18,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 677 transitions. [2022-12-13 17:53:18,458 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.449535192563081 [2022-12-13 17:53:18,458 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 677 transitions. [2022-12-13 17:53:18,458 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 677 transitions. [2022-12-13 17:53:18,459 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:53:18,459 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 677 transitions. [2022-12-13 17:53:18,459 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 225.66666666666666) internal successors, (677), 3 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:53:18,461 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 502.0) internal successors, (2008), 4 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:53:18,461 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 502.0) internal successors, (2008), 4 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:53:18,461 INFO L175 Difference]: Start difference. First operand has 88 places, 78 transitions, 485 flow. Second operand 3 states and 677 transitions. [2022-12-13 17:53:18,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 77 transitions, 625 flow [2022-12-13 17:53:18,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 77 transitions, 620 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 17:53:18,525 INFO L231 Difference]: Finished difference. Result has 85 places, 77 transitions, 474 flow [2022-12-13 17:53:18,525 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=472, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=474, PETRI_PLACES=85, PETRI_TRANSITIONS=77} [2022-12-13 17:53:18,526 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, 35 predicate places. [2022-12-13 17:53:18,526 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 77 transitions, 474 flow [2022-12-13 17:53:18,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 217.33333333333334) internal successors, (652), 3 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:53:18,526 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:53:18,526 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:53:18,530 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 17:53:18,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:53:18,728 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2022-12-13 17:53:18,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:53:18,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1267126403, now seen corresponding path program 1 times [2022-12-13 17:53:18,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:53:18,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462831056] [2022-12-13 17:53:18,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:53:18,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:53:18,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:53:18,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:53:18,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:53:18,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462831056] [2022-12-13 17:53:18,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462831056] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:53:18,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:53:18,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 17:53:18,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204681563] [2022-12-13 17:53:18,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:53:18,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 17:53:18,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:53:18,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 17:53:18,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 17:53:18,868 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 502 [2022-12-13 17:53:18,868 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 77 transitions, 474 flow. Second operand has 4 states, 4 states have (on average 209.5) internal successors, (838), 4 states have internal predecessors, (838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:53:18,869 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:53:18,869 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 502 [2022-12-13 17:53:18,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:53:23,398 INFO L130 PetriNetUnfolder]: 31195/46545 cut-off events. [2022-12-13 17:53:23,399 INFO L131 PetriNetUnfolder]: For 99281/100709 co-relation queries the response was YES. [2022-12-13 17:53:23,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154298 conditions, 46545 events. 31195/46545 cut-off events. For 99281/100709 co-relation queries the response was YES. Maximal size of possible extension queue 1686. Compared 327666 event pairs, 20717 based on Foata normal form. 1580/33121 useless extension candidates. Maximal degree in co-relation 154265. Up to 45869 conditions per place. [2022-12-13 17:53:23,703 INFO L137 encePairwiseOnDemand]: 494/502 looper letters, 61 selfloop transitions, 13 changer transitions 20/97 dead transitions. [2022-12-13 17:53:23,703 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 97 transitions, 761 flow [2022-12-13 17:53:23,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 17:53:23,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 17:53:23,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 879 transitions. [2022-12-13 17:53:23,706 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43774900398406374 [2022-12-13 17:53:23,706 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 879 transitions. [2022-12-13 17:53:23,706 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 879 transitions. [2022-12-13 17:53:23,706 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:53:23,706 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 879 transitions. [2022-12-13 17:53:23,707 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 219.75) internal successors, (879), 4 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:53:23,709 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 502.0) internal successors, (2510), 5 states have internal predecessors, (2510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:53:23,709 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 502.0) internal successors, (2510), 5 states have internal predecessors, (2510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:53:23,709 INFO L175 Difference]: Start difference. First operand has 85 places, 77 transitions, 474 flow. Second operand 4 states and 879 transitions. [2022-12-13 17:53:23,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 97 transitions, 761 flow [2022-12-13 17:53:23,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 97 transitions, 760 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 17:53:23,780 INFO L231 Difference]: Finished difference. Result has 89 places, 77 transitions, 524 flow [2022-12-13 17:53:23,780 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=473, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=524, PETRI_PLACES=89, PETRI_TRANSITIONS=77} [2022-12-13 17:53:23,781 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, 39 predicate places. [2022-12-13 17:53:23,781 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 77 transitions, 524 flow [2022-12-13 17:53:23,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 209.5) internal successors, (838), 4 states have internal predecessors, (838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:53:23,781 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:53:23,781 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:53:23,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-13 17:53:23,781 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2022-12-13 17:53:23,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:53:23,782 INFO L85 PathProgramCache]: Analyzing trace with hash 747227036, now seen corresponding path program 1 times [2022-12-13 17:53:23,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:53:23,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190882341] [2022-12-13 17:53:23,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:53:23,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:53:23,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:53:23,841 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 17:53:23,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:53:23,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190882341] [2022-12-13 17:53:23,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190882341] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:53:23,842 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:53:23,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 17:53:23,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69414112] [2022-12-13 17:53:23,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:53:23,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:53:23,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:53:23,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:53:23,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:53:23,848 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 502 [2022-12-13 17:53:23,849 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 77 transitions, 524 flow. Second operand has 3 states, 3 states have (on average 216.66666666666666) internal successors, (650), 3 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:53:23,849 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:53:23,849 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 502 [2022-12-13 17:53:23,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:53:27,768 INFO L130 PetriNetUnfolder]: 24202/36419 cut-off events. [2022-12-13 17:53:27,768 INFO L131 PetriNetUnfolder]: For 65619/66039 co-relation queries the response was YES. [2022-12-13 17:53:27,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121024 conditions, 36419 events. 24202/36419 cut-off events. For 65619/66039 co-relation queries the response was YES. Maximal size of possible extension queue 1220. Compared 243728 event pairs, 8370 based on Foata normal form. 600/25259 useless extension candidates. Maximal degree in co-relation 120989. Up to 35681 conditions per place. [2022-12-13 17:53:28,008 INFO L137 encePairwiseOnDemand]: 498/502 looper letters, 75 selfloop transitions, 5 changer transitions 0/82 dead transitions. [2022-12-13 17:53:28,009 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 82 transitions, 694 flow [2022-12-13 17:53:28,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:53:28,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:53:28,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 680 transitions. [2022-12-13 17:53:28,011 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45152722443559096 [2022-12-13 17:53:28,011 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 680 transitions. [2022-12-13 17:53:28,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 680 transitions. [2022-12-13 17:53:28,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:53:28,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 680 transitions. [2022-12-13 17:53:28,012 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 226.66666666666666) internal successors, (680), 3 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:53:28,013 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 502.0) internal successors, (2008), 4 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:53:28,013 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 502.0) internal successors, (2008), 4 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:53:28,013 INFO L175 Difference]: Start difference. First operand has 89 places, 77 transitions, 524 flow. Second operand 3 states and 680 transitions. [2022-12-13 17:53:28,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 82 transitions, 694 flow [2022-12-13 17:53:28,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 82 transitions, 648 flow, removed 9 selfloop flow, removed 4 redundant places. [2022-12-13 17:53:28,351 INFO L231 Difference]: Finished difference. Result has 86 places, 75 transitions, 490 flow [2022-12-13 17:53:28,351 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=461, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=490, PETRI_PLACES=86, PETRI_TRANSITIONS=75} [2022-12-13 17:53:28,351 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, 36 predicate places. [2022-12-13 17:53:28,351 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 75 transitions, 490 flow [2022-12-13 17:53:28,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 216.66666666666666) internal successors, (650), 3 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:53:28,352 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:53:28,352 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1] [2022-12-13 17:53:28,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-13 17:53:28,352 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2022-12-13 17:53:28,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:53:28,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1663189781, now seen corresponding path program 2 times [2022-12-13 17:53:28,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:53:28,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534143419] [2022-12-13 17:53:28,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:53:28,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:53:28,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:53:28,470 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:53:28,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:53:28,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534143419] [2022-12-13 17:53:28,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534143419] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:53:28,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876252409] [2022-12-13 17:53:28,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:53:28,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:53:28,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:53:28,471 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:53:28,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 17:53:28,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 17:53:28,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:53:28,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 17:53:28,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:53:28,575 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 17:53:28,575 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 17:53:28,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876252409] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:53:28,575 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 17:53:28,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [12] total 14 [2022-12-13 17:53:28,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296070573] [2022-12-13 17:53:28,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:53:28,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 17:53:28,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:53:28,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 17:53:28,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2022-12-13 17:53:28,597 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 502 [2022-12-13 17:53:28,598 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 75 transitions, 490 flow. Second operand has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:53:28,598 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:53:28,598 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 502 [2022-12-13 17:53:28,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:53:31,414 INFO L130 PetriNetUnfolder]: 18052/27046 cut-off events. [2022-12-13 17:53:31,414 INFO L131 PetriNetUnfolder]: For 60929/61289 co-relation queries the response was YES. [2022-12-13 17:53:31,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91847 conditions, 27046 events. 18052/27046 cut-off events. For 60929/61289 co-relation queries the response was YES. Maximal size of possible extension queue 902. Compared 173568 event pairs, 11100 based on Foata normal form. 2183/20189 useless extension candidates. Maximal degree in co-relation 91813. Up to 27026 conditions per place. [2022-12-13 17:53:31,552 INFO L137 encePairwiseOnDemand]: 498/502 looper letters, 65 selfloop transitions, 1 changer transitions 3/71 dead transitions. [2022-12-13 17:53:31,553 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 71 transitions, 573 flow [2022-12-13 17:53:31,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:53:31,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:53:31,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 664 transitions. [2022-12-13 17:53:31,554 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4409030544488712 [2022-12-13 17:53:31,554 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 664 transitions. [2022-12-13 17:53:31,554 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 664 transitions. [2022-12-13 17:53:31,555 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:53:31,555 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 664 transitions. [2022-12-13 17:53:31,556 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) [2022-12-13 17:53:31,557 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 502.0) internal successors, (2008), 4 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:53:31,557 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 502.0) internal successors, (2008), 4 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:53:31,557 INFO L175 Difference]: Start difference. First operand has 86 places, 75 transitions, 490 flow. Second operand 3 states and 664 transitions. [2022-12-13 17:53:31,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 71 transitions, 573 flow [2022-12-13 17:53:31,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 71 transitions, 480 flow, removed 10 selfloop flow, removed 13 redundant places. [2022-12-13 17:53:31,594 INFO L231 Difference]: Finished difference. Result has 71 places, 68 transitions, 320 flow [2022-12-13 17:53:31,594 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=320, PETRI_PLACES=71, PETRI_TRANSITIONS=68} [2022-12-13 17:53:31,594 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, 21 predicate places. [2022-12-13 17:53:31,595 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 68 transitions, 320 flow [2022-12-13 17:53:31,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:53:31,595 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:53:31,595 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:53:31,598 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 17:53:31,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:53:31,796 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2022-12-13 17:53:31,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:53:31,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1880805110, now seen corresponding path program 1 times [2022-12-13 17:53:31,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:53:31,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71352567] [2022-12-13 17:53:31,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:53:31,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:53:31,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:53:32,220 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:53:32,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:53:32,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71352567] [2022-12-13 17:53:32,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71352567] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:53:32,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973170939] [2022-12-13 17:53:32,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:53:32,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:53:32,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:53:32,222 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:53:32,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 17:53:32,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:53:32,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-13 17:53:32,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:53:32,387 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 11 treesize of output 7 [2022-12-13 17:53:32,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:53:32,427 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 16 treesize of output 18 [2022-12-13 17:53:32,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:53:32,475 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 16 treesize of output 18 [2022-12-13 17:53:32,519 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:53:32,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:53:32,731 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:53:32,731 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 31 treesize of output 32 [2022-12-13 17:53:32,743 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:53:32,743 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 175 treesize of output 163 [2022-12-13 17:53:32,750 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 146 treesize of output 122 [2022-12-13 17:53:32,757 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 122 treesize of output 110 [2022-12-13 17:53:32,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:53:32,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973170939] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:53:32,921 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:53:32,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 18 [2022-12-13 17:53:32,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834574625] [2022-12-13 17:53:32,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:53:32,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 17:53:32,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:53:32,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 17:53:32,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=318, Unknown=2, NotChecked=0, Total=380 [2022-12-13 17:53:35,493 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:53:37,641 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:53:39,760 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:53:41,841 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:53:41,873 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 502 [2022-12-13 17:53:41,875 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 68 transitions, 320 flow. Second operand has 20 states, 20 states have (on average 158.7) internal successors, (3174), 20 states have internal predecessors, (3174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:53:41,875 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:53:41,875 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 502 [2022-12-13 17:53:41,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:53:46,936 INFO L130 PetriNetUnfolder]: 17964/26804 cut-off events. [2022-12-13 17:53:46,936 INFO L131 PetriNetUnfolder]: For 19073/19459 co-relation queries the response was YES. [2022-12-13 17:53:46,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78398 conditions, 26804 events. 17964/26804 cut-off events. For 19073/19459 co-relation queries the response was YES. Maximal size of possible extension queue 862. Compared 171156 event pairs, 9972 based on Foata normal form. 386/18207 useless extension candidates. Maximal degree in co-relation 78375. Up to 26473 conditions per place. [2022-12-13 17:53:47,039 INFO L137 encePairwiseOnDemand]: 491/502 looper letters, 108 selfloop transitions, 28 changer transitions 0/138 dead transitions. [2022-12-13 17:53:47,039 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 138 transitions, 1002 flow [2022-12-13 17:53:47,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 17:53:47,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 17:53:47,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1962 transitions. [2022-12-13 17:53:47,043 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3256972111553785 [2022-12-13 17:53:47,043 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1962 transitions. [2022-12-13 17:53:47,043 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1962 transitions. [2022-12-13 17:53:47,044 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:53:47,044 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1962 transitions. [2022-12-13 17:53:47,046 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 163.5) internal successors, (1962), 12 states have internal predecessors, (1962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:53:47,050 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 502.0) internal successors, (6526), 13 states have internal predecessors, (6526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:53:47,050 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 502.0) internal successors, (6526), 13 states have internal predecessors, (6526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:53:47,051 INFO L175 Difference]: Start difference. First operand has 71 places, 68 transitions, 320 flow. Second operand 12 states and 1962 transitions. [2022-12-13 17:53:47,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 138 transitions, 1002 flow [2022-12-13 17:53:47,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 138 transitions, 949 flow, removed 26 selfloop flow, removed 4 redundant places. [2022-12-13 17:53:47,066 INFO L231 Difference]: Finished difference. Result has 78 places, 82 transitions, 437 flow [2022-12-13 17:53:47,066 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=307, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=437, PETRI_PLACES=78, PETRI_TRANSITIONS=82} [2022-12-13 17:53:47,066 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, 28 predicate places. [2022-12-13 17:53:47,066 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 82 transitions, 437 flow [2022-12-13 17:53:47,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 158.7) internal successors, (3174), 20 states have internal predecessors, (3174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:53:47,067 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:53:47,067 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:53:47,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-13 17:53:47,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:53:47,268 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2022-12-13 17:53:47,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:53:47,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1880804953, now seen corresponding path program 1 times [2022-12-13 17:53:47,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:53:47,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100564467] [2022-12-13 17:53:47,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:53:47,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:53:47,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:53:47,737 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:53:47,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:53:47,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100564467] [2022-12-13 17:53:47,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100564467] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:53:47,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926591263] [2022-12-13 17:53:47,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:53:47,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:53:47,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:53:47,738 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:53:47,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 17:53:47,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:53:47,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-13 17:53:47,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:53:47,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:53:47,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:53:47,879 INFO L321 Elim1Store]: treesize reduction 43, result has 41.9 percent of original size [2022-12-13 17:53:47,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 36 [2022-12-13 17:53:47,928 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 [2022-12-13 17:53:47,990 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 17:53:47,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-13 17:53:48,032 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 [2022-12-13 17:53:48,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:53:48,074 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 [2022-12-13 17:53:48,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:53:48,163 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 [2022-12-13 17:53:48,240 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-12-13 17:53:48,240 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 [2022-12-13 17:53:48,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:53:48,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:53:48,591 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:53:48,591 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 32 treesize of output 33 [2022-12-13 17:53:48,602 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:53:48,603 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 155 treesize of output 151 [2022-12-13 17:53:48,608 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 136 treesize of output 124 [2022-12-13 17:53:48,613 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 124 treesize of output 100 [2022-12-13 17:53:48,620 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 52 treesize of output 46 [2022-12-13 17:53:48,829 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:53:48,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926591263] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:53:48,830 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:53:48,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 25 [2022-12-13 17:53:48,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014607612] [2022-12-13 17:53:48,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:53:48,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-13 17:53:48,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:53:48,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-13 17:53:48,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=618, Unknown=7, NotChecked=0, Total=702 [2022-12-13 17:53:50,681 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 502 [2022-12-13 17:53:50,683 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 82 transitions, 437 flow. Second operand has 27 states, 27 states have (on average 145.33333333333334) internal successors, (3924), 27 states have internal predecessors, (3924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:53:50,683 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:53:50,683 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 502 [2022-12-13 17:53:50,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:53:53,120 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 17:54:04,109 INFO L130 PetriNetUnfolder]: 19758/30176 cut-off events. [2022-12-13 17:54:04,109 INFO L131 PetriNetUnfolder]: For 25559/25946 co-relation queries the response was YES. [2022-12-13 17:54:04,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94574 conditions, 30176 events. 19758/30176 cut-off events. For 25559/25946 co-relation queries the response was YES. Maximal size of possible extension queue 1021. Compared 204877 event pairs, 8381 based on Foata normal form. 387/23441 useless extension candidates. Maximal degree in co-relation 94549. Up to 17421 conditions per place. [2022-12-13 17:54:04,247 INFO L137 encePairwiseOnDemand]: 487/502 looper letters, 171 selfloop transitions, 109 changer transitions 0/282 dead transitions. [2022-12-13 17:54:04,248 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 282 transitions, 1960 flow [2022-12-13 17:54:04,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-12-13 17:54:04,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2022-12-13 17:54:04,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 6256 transitions. [2022-12-13 17:54:04,256 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.29671789034338836 [2022-12-13 17:54:04,256 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 6256 transitions. [2022-12-13 17:54:04,256 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 6256 transitions. [2022-12-13 17:54:04,258 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:54:04,258 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 6256 transitions. [2022-12-13 17:54:04,264 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 148.95238095238096) internal successors, (6256), 42 states have internal predecessors, (6256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:04,276 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 502.0) internal successors, (21586), 43 states have internal predecessors, (21586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:04,278 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 502.0) internal successors, (21586), 43 states have internal predecessors, (21586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:04,278 INFO L175 Difference]: Start difference. First operand has 78 places, 82 transitions, 437 flow. Second operand 42 states and 6256 transitions. [2022-12-13 17:54:04,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 282 transitions, 1960 flow [2022-12-13 17:54:04,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 282 transitions, 1896 flow, removed 14 selfloop flow, removed 4 redundant places. [2022-12-13 17:54:04,555 INFO L231 Difference]: Finished difference. Result has 127 places, 173 transitions, 1204 flow [2022-12-13 17:54:04,555 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=399, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=1204, PETRI_PLACES=127, PETRI_TRANSITIONS=173} [2022-12-13 17:54:04,555 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, 77 predicate places. [2022-12-13 17:54:04,555 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 173 transitions, 1204 flow [2022-12-13 17:54:04,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 145.33333333333334) internal successors, (3924), 27 states have internal predecessors, (3924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:04,556 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:54:04,556 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:54:04,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-12-13 17:54:04,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-13 17:54:04,758 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2022-12-13 17:54:04,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:54:04,759 INFO L85 PathProgramCache]: Analyzing trace with hash 150948562, now seen corresponding path program 2 times [2022-12-13 17:54:04,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:54:04,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077872950] [2022-12-13 17:54:04,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:54:04,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:54:04,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:54:05,144 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 17:54:05,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:54:05,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077872950] [2022-12-13 17:54:05,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077872950] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:54:05,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447984615] [2022-12-13 17:54:05,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:54:05,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:54:05,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:54:05,146 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:54:05,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 17:54:05,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 17:54:05,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:54:05,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 17:54:05,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:54:05,282 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 [2022-12-13 17:54:05,295 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 17:54:05,296 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 17:54:05,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447984615] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:54:05,296 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 17:54:05,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2022-12-13 17:54:05,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413728596] [2022-12-13 17:54:05,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:54:05,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 17:54:05,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:54:05,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 17:54:05,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-12-13 17:54:05,348 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 502 [2022-12-13 17:54:05,349 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 173 transitions, 1204 flow. Second operand has 6 states, 6 states have (on average 202.0) internal successors, (1212), 6 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:05,349 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:54:05,349 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 502 [2022-12-13 17:54:05,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:54:09,562 INFO L130 PetriNetUnfolder]: 24805/38442 cut-off events. [2022-12-13 17:54:09,562 INFO L131 PetriNetUnfolder]: For 81167/81583 co-relation queries the response was YES. [2022-12-13 17:54:09,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140918 conditions, 38442 events. 24805/38442 cut-off events. For 81167/81583 co-relation queries the response was YES. Maximal size of possible extension queue 1327. Compared 275903 event pairs, 7234 based on Foata normal form. 755/32744 useless extension candidates. Maximal degree in co-relation 140881. Up to 29571 conditions per place. [2022-12-13 17:54:09,779 INFO L137 encePairwiseOnDemand]: 494/502 looper letters, 218 selfloop transitions, 45 changer transitions 0/265 dead transitions. [2022-12-13 17:54:09,779 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 265 transitions, 2338 flow [2022-12-13 17:54:09,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 17:54:09,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 17:54:09,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1067 transitions. [2022-12-13 17:54:09,782 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4250996015936255 [2022-12-13 17:54:09,782 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1067 transitions. [2022-12-13 17:54:09,782 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1067 transitions. [2022-12-13 17:54:09,782 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:54:09,782 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1067 transitions. [2022-12-13 17:54:09,783 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 213.4) internal successors, (1067), 5 states have internal predecessors, (1067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:09,785 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 502.0) internal successors, (3012), 6 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:09,785 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 502.0) internal successors, (3012), 6 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:09,785 INFO L175 Difference]: Start difference. First operand has 127 places, 173 transitions, 1204 flow. Second operand 5 states and 1067 transitions. [2022-12-13 17:54:09,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 265 transitions, 2338 flow [2022-12-13 17:54:10,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 265 transitions, 2189 flow, removed 33 selfloop flow, removed 7 redundant places. [2022-12-13 17:54:10,732 INFO L231 Difference]: Finished difference. Result has 126 places, 205 transitions, 1520 flow [2022-12-13 17:54:10,732 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=1095, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1520, PETRI_PLACES=126, PETRI_TRANSITIONS=205} [2022-12-13 17:54:10,733 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, 76 predicate places. [2022-12-13 17:54:10,733 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 205 transitions, 1520 flow [2022-12-13 17:54:10,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 202.0) internal successors, (1212), 6 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:10,733 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:54:10,733 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:54:10,737 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-13 17:54:10,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-13 17:54:10,934 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2022-12-13 17:54:10,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:54:10,935 INFO L85 PathProgramCache]: Analyzing trace with hash -562068469, now seen corresponding path program 1 times [2022-12-13 17:54:10,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:54:10,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223361845] [2022-12-13 17:54:10,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:54:10,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:54:10,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:54:11,398 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:54:11,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:54:11,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223361845] [2022-12-13 17:54:11,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223361845] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:54:11,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195904484] [2022-12-13 17:54:11,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:54:11,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:54:11,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:54:11,400 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:54:11,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 17:54:11,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:54:11,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-13 17:54:11,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:54:11,538 INFO L321 Elim1Store]: treesize reduction 81, result has 25.7 percent of original size [2022-12-13 17:54:11,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 15 treesize of output 33 [2022-12-13 17:54:11,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:54:11,622 INFO L321 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2022-12-13 17:54:11,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 53 [2022-12-13 17:54:11,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-13 17:54:11,714 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 14 treesize of output 16 [2022-12-13 17:54:11,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:54:11,748 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 14 treesize of output 16 [2022-12-13 17:54:11,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:54:11,793 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 14 treesize of output 16 [2022-12-13 17:54:11,832 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:54:11,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:54:11,923 WARN L837 $PredicateComparison]: unable to prove that (forall ((~q2_back~0 Int) (v_ArrVal_764 (Array Int Int))) (or (not (< ~q2_back~0 c_~n2~0)) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_764) c_~q2~0.base) (+ c_~q2~0.offset (* ~q2_back~0 4))) 2147483648) (not (<= 0 ~q2_back~0)))) is different from false [2022-12-13 17:54:12,041 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:54:12,042 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 32 treesize of output 33 [2022-12-13 17:54:12,053 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:54:12,053 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 1233 treesize of output 1173 [2022-12-13 17:54:12,063 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 1158 treesize of output 966 [2022-12-13 17:54:12,074 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 966 treesize of output 870 [2022-12-13 17:54:12,084 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 870 treesize of output 822 [2022-12-13 17:54:13,478 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:54:13,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195904484] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:54:13,478 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:54:13,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 22 [2022-12-13 17:54:13,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158079810] [2022-12-13 17:54:13,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:54:13,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 17:54:13,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:54:13,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 17:54:13,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=4, NotChecked=42, Total=552 [2022-12-13 17:54:13,663 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 502 [2022-12-13 17:54:13,666 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 205 transitions, 1520 flow. Second operand has 24 states, 24 states have (on average 153.625) internal successors, (3687), 24 states have internal predecessors, (3687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:13,666 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:54:13,666 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 502 [2022-12-13 17:54:13,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:54:18,623 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 17:54:20,662 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 17:54:22,800 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 17:54:28,337 INFO L130 PetriNetUnfolder]: 27274/42486 cut-off events. [2022-12-13 17:54:28,337 INFO L131 PetriNetUnfolder]: For 100622/101032 co-relation queries the response was YES. [2022-12-13 17:54:28,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158826 conditions, 42486 events. 27274/42486 cut-off events. For 100622/101032 co-relation queries the response was YES. Maximal size of possible extension queue 1473. Compared 313484 event pairs, 15605 based on Foata normal form. 504/35620 useless extension candidates. Maximal degree in co-relation 158788. Up to 33582 conditions per place. [2022-12-13 17:54:28,612 INFO L137 encePairwiseOnDemand]: 490/502 looper letters, 268 selfloop transitions, 83 changer transitions 0/353 dead transitions. [2022-12-13 17:54:28,612 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 353 transitions, 3219 flow [2022-12-13 17:54:28,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 17:54:28,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 17:54:28,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2266 transitions. [2022-12-13 17:54:28,615 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.32242458736482643 [2022-12-13 17:54:28,615 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2266 transitions. [2022-12-13 17:54:28,615 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2266 transitions. [2022-12-13 17:54:28,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:54:28,616 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2266 transitions. [2022-12-13 17:54:28,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 161.85714285714286) internal successors, (2266), 14 states have internal predecessors, (2266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:28,686 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 502.0) internal successors, (7530), 15 states have internal predecessors, (7530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:28,686 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 502.0) internal successors, (7530), 15 states have internal predecessors, (7530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:28,686 INFO L175 Difference]: Start difference. First operand has 126 places, 205 transitions, 1520 flow. Second operand 14 states and 2266 transitions. [2022-12-13 17:54:28,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 353 transitions, 3219 flow [2022-12-13 17:54:29,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 353 transitions, 3124 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-12-13 17:54:29,644 INFO L231 Difference]: Finished difference. Result has 142 places, 233 transitions, 2028 flow [2022-12-13 17:54:29,644 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=1472, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2028, PETRI_PLACES=142, PETRI_TRANSITIONS=233} [2022-12-13 17:54:29,645 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, 92 predicate places. [2022-12-13 17:54:29,645 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 233 transitions, 2028 flow [2022-12-13 17:54:29,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 153.625) internal successors, (3687), 24 states have internal predecessors, (3687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:29,645 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:54:29,645 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:54:29,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-12-13 17:54:29,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:54:29,847 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2022-12-13 17:54:29,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:54:29,848 INFO L85 PathProgramCache]: Analyzing trace with hash -562068626, now seen corresponding path program 1 times [2022-12-13 17:54:29,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:54:29,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451818288] [2022-12-13 17:54:29,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:54:29,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:54:29,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:54:30,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:54:30,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:54:30,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451818288] [2022-12-13 17:54:30,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451818288] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:54:30,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939905137] [2022-12-13 17:54:30,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:54:30,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:54:30,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:54:30,276 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:54:30,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-13 17:54:30,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:54:30,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 17:54:30,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:54:30,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:54:30,421 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 [2022-12-13 17:54:30,453 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 [2022-12-13 17:54:30,467 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 17:54:30,467 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 17:54:30,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939905137] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:54:30,467 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 17:54:30,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 14 [2022-12-13 17:54:30,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513585483] [2022-12-13 17:54:30,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:54:30,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 17:54:30,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:54:30,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 17:54:30,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2022-12-13 17:54:30,567 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 502 [2022-12-13 17:54:30,568 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 233 transitions, 2028 flow. Second operand has 8 states, 8 states have (on average 194.625) internal successors, (1557), 8 states have internal predecessors, (1557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:30,568 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:54:30,568 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 502 [2022-12-13 17:54:30,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:54:36,721 INFO L130 PetriNetUnfolder]: 30865/48994 cut-off events. [2022-12-13 17:54:36,721 INFO L131 PetriNetUnfolder]: For 148597/149006 co-relation queries the response was YES. [2022-12-13 17:54:36,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 193090 conditions, 48994 events. 30865/48994 cut-off events. For 148597/149006 co-relation queries the response was YES. Maximal size of possible extension queue 1838. Compared 381941 event pairs, 11622 based on Foata normal form. 699/41248 useless extension candidates. Maximal degree in co-relation 193047. Up to 41974 conditions per place. [2022-12-13 17:54:37,030 INFO L137 encePairwiseOnDemand]: 494/502 looper letters, 264 selfloop transitions, 54 changer transitions 0/320 dead transitions. [2022-12-13 17:54:37,030 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 320 transitions, 3335 flow [2022-12-13 17:54:37,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 17:54:37,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 17:54:37,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1422 transitions. [2022-12-13 17:54:37,033 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40466704610130905 [2022-12-13 17:54:37,034 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1422 transitions. [2022-12-13 17:54:37,034 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1422 transitions. [2022-12-13 17:54:37,034 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:54:37,034 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1422 transitions. [2022-12-13 17:54:37,035 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) [2022-12-13 17:54:37,037 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 502.0) internal successors, (4016), 8 states have internal predecessors, (4016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:37,037 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 502.0) internal successors, (4016), 8 states have internal predecessors, (4016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:37,037 INFO L175 Difference]: Start difference. First operand has 142 places, 233 transitions, 2028 flow. Second operand 7 states and 1422 transitions. [2022-12-13 17:54:37,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 320 transitions, 3335 flow [2022-12-13 17:54:38,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 320 transitions, 3170 flow, removed 42 selfloop flow, removed 10 redundant places. [2022-12-13 17:54:38,316 INFO L231 Difference]: Finished difference. Result has 140 places, 250 transitions, 2241 flow [2022-12-13 17:54:38,316 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=1922, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2241, PETRI_PLACES=140, PETRI_TRANSITIONS=250} [2022-12-13 17:54:38,316 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, 90 predicate places. [2022-12-13 17:54:38,316 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 250 transitions, 2241 flow [2022-12-13 17:54:38,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 194.625) internal successors, (1557), 8 states have internal predecessors, (1557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:38,317 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:54:38,317 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:54:38,321 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-13 17:54:38,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:54:38,518 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2022-12-13 17:54:38,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:54:38,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1385694785, now seen corresponding path program 1 times [2022-12-13 17:54:38,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:54:38,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81658406] [2022-12-13 17:54:38,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:54:38,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:54:38,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:54:38,876 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:54:38,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:54:38,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81658406] [2022-12-13 17:54:38,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81658406] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:54:38,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623113200] [2022-12-13 17:54:38,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:54:38,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:54:38,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:54:38,878 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:54:38,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-13 17:54:38,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:54:38,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-13 17:54:38,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:54:38,999 INFO L321 Elim1Store]: treesize reduction 81, result has 25.7 percent of original size [2022-12-13 17:54:38,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 15 treesize of output 33 [2022-12-13 17:54:39,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:54:39,080 INFO L321 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2022-12-13 17:54:39,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 53 [2022-12-13 17:54:39,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-13 17:54:39,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:54:39,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-13 17:54:39,200 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 16 treesize of output 18 [2022-12-13 17:54:39,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:54:39,285 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 16 treesize of output 18 [2022-12-13 17:54:39,314 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:54:39,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:54:39,466 WARN L837 $PredicateComparison]: unable to prove that (forall ((~q2_back~0 Int) (v_ArrVal_881 (Array Int Int)) (v_ArrVal_880 (Array Int Int))) (or (< 0 (+ 2147483649 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_880) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_881) c_~q2~0.base) (+ c_~q2~0.offset (* ~q2_back~0 4))))) (not (< ~q2_back~0 c_~n2~0)) (not (<= 0 ~q2_back~0)))) is different from false [2022-12-13 17:54:39,552 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:54:39,552 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 34 treesize of output 35 [2022-12-13 17:54:39,563 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:54:39,563 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 343 treesize of output 331 [2022-12-13 17:54:39,570 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 314 treesize of output 290 [2022-12-13 17:54:39,576 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 290 treesize of output 242 [2022-12-13 17:54:39,584 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 127 treesize of output 115 [2022-12-13 17:54:39,910 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:54:39,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623113200] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:54:39,910 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:54:39,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 20 [2022-12-13 17:54:39,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171817516] [2022-12-13 17:54:39,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:54:39,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-13 17:54:39,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:54:39,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-13 17:54:39,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=363, Unknown=5, NotChecked=38, Total=462 [2022-12-13 17:54:40,118 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 502 [2022-12-13 17:54:40,120 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 250 transitions, 2241 flow. Second operand has 22 states, 22 states have (on average 146.77272727272728) internal successors, (3229), 22 states have internal predecessors, (3229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:40,120 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:54:40,120 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 502 [2022-12-13 17:54:40,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:54:46,727 WARN L837 $PredicateComparison]: unable to prove that (and (exists ((|ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| Int)) (= (select |c_#valid| |ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) 1)) (forall ((~q2_back~0 Int) (v_ArrVal_881 (Array Int Int))) (or (not (< ~q2_back~0 c_~n2~0)) (not (<= 0 ~q2_back~0)) (< 0 (+ 2147483649 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_881) c_~q2~0.base) (+ c_~q2~0.offset (* ~q2_back~0 4))))))) (or (= (select |c_#valid| |c_ULTIMATE.start_main_~#t1~0#1.base|) 1) (= |c_ULTIMATE.start_main_~#t3~0#1.base| |c_ULTIMATE.start_main_~#t1~0#1.base|)) (< |c_#StackHeapBarrier| |c_ULTIMATE.start_main_~#t3~0#1.base|) (or (= (select |c_#valid| |c_ULTIMATE.start_main_~#t2~0#1.base|) 1) (= |c_ULTIMATE.start_main_~#t3~0#1.base| |c_ULTIMATE.start_main_~#t2~0#1.base|)) (< |c_#StackHeapBarrier| |c_ULTIMATE.start_main_~#t1~0#1.base|) (forall ((~q2_back~0 Int) (v_ArrVal_881 (Array Int Int))) (or (not (< ~q2_back~0 c_~n2~0)) (<= 0 (+ c_~s~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_881) c_~q2~0.base) (+ c_~q2~0.offset (* ~q2_back~0 4))) 2147483648)) (not (<= 0 ~q2_back~0))))) is different from false [2022-12-13 17:54:48,857 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 17:54:59,980 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 17:55:02,053 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 17:55:02,636 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((~q2_back~0 Int)) (or (<= 0 (+ c_~s~0 (select (select |c_#memory_int| c_~q2~0.base) (+ c_~q2~0.offset (* ~q2_back~0 4))) 2147483648)) (not (< ~q2_back~0 c_~n2~0)) (not (<= 0 ~q2_back~0)))) (forall ((~q2_back~0 Int) (v_ArrVal_881 (Array Int Int))) (or (not (< ~q2_back~0 c_~n2~0)) (<= 0 (+ c_~s~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_881) c_~q2~0.base) (+ c_~q2~0.offset (* ~q2_back~0 4))) 2147483648)) (not (<= 0 ~q2_back~0))))) is different from false [2022-12-13 17:55:09,186 INFO L130 PetriNetUnfolder]: 32781/51859 cut-off events. [2022-12-13 17:55:09,186 INFO L131 PetriNetUnfolder]: For 171689/172104 co-relation queries the response was YES. [2022-12-13 17:55:09,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 207878 conditions, 51859 events. 32781/51859 cut-off events. For 171689/172104 co-relation queries the response was YES. Maximal size of possible extension queue 1951. Compared 404015 event pairs, 18262 based on Foata normal form. 808/43812 useless extension candidates. Maximal degree in co-relation 207837. Up to 41053 conditions per place. [2022-12-13 17:55:09,578 INFO L137 encePairwiseOnDemand]: 487/502 looper letters, 398 selfloop transitions, 177 changer transitions 0/577 dead transitions. [2022-12-13 17:55:09,579 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 577 transitions, 5707 flow [2022-12-13 17:55:09,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-12-13 17:55:09,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2022-12-13 17:55:09,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 6692 transitions. [2022-12-13 17:55:09,590 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.30296993842810577 [2022-12-13 17:55:09,591 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 6692 transitions. [2022-12-13 17:55:09,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 6692 transitions. [2022-12-13 17:55:09,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:55:09,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 6692 transitions. [2022-12-13 17:55:09,602 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 152.0909090909091) internal successors, (6692), 44 states have internal predecessors, (6692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:55:09,617 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 502.0) internal successors, (22590), 45 states have internal predecessors, (22590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:55:09,620 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 502.0) internal successors, (22590), 45 states have internal predecessors, (22590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:55:09,620 INFO L175 Difference]: Start difference. First operand has 140 places, 250 transitions, 2241 flow. Second operand 44 states and 6692 transitions. [2022-12-13 17:55:09,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 577 transitions, 5707 flow [2022-12-13 17:55:10,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 577 transitions, 5619 flow, removed 19 selfloop flow, removed 2 redundant places. [2022-12-13 17:55:10,669 INFO L231 Difference]: Finished difference. Result has 196 places, 345 transitions, 3818 flow [2022-12-13 17:55:10,670 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=2177, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=3818, PETRI_PLACES=196, PETRI_TRANSITIONS=345} [2022-12-13 17:55:10,670 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, 146 predicate places. [2022-12-13 17:55:10,670 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 345 transitions, 3818 flow [2022-12-13 17:55:10,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 146.77272727272728) internal successors, (3229), 22 states have internal predecessors, (3229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:55:10,670 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:55:10,670 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:55:10,674 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-13 17:55:10,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-12-13 17:55:10,872 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2022-12-13 17:55:10,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:55:10,873 INFO L85 PathProgramCache]: Analyzing trace with hash 150970665, now seen corresponding path program 1 times [2022-12-13 17:55:10,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:55:10,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946815993] [2022-12-13 17:55:10,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:55:10,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:55:10,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:55:11,442 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:55:11,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:55:11,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946815993] [2022-12-13 17:55:11,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946815993] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:55:11,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889255824] [2022-12-13 17:55:11,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:55:11,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:55:11,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:55:11,444 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:55:11,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-13 17:55:11,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:55:11,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-13 17:55:11,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:55:11,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:55:11,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:55:11,561 INFO L321 Elim1Store]: treesize reduction 43, result has 41.9 percent of original size [2022-12-13 17:55:11,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 36 [2022-12-13 17:55:11,608 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 [2022-12-13 17:55:11,669 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 17:55:11,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-13 17:55:11,730 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 [2022-12-13 17:55:11,752 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 [2022-12-13 17:55:11,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:55:11,804 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 [2022-12-13 17:55:11,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:55:11,861 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 [2022-12-13 17:55:12,025 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-12-13 17:55:12,025 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 [2022-12-13 17:55:12,054 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:55:12,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:55:12,458 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:55:12,458 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 32 treesize of output 33 [2022-12-13 17:55:12,470 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:55:12,470 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 309 treesize of output 297 [2022-12-13 17:55:12,477 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 282 treesize of output 258 [2022-12-13 17:55:12,485 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 134 treesize of output 122 [2022-12-13 17:55:12,492 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 246 treesize of output 198 [2022-12-13 17:55:12,708 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:55:12,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889255824] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:55:12,708 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:55:12,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2022-12-13 17:55:12,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800179224] [2022-12-13 17:55:12,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:55:12,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-13 17:55:12,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:55:12,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-13 17:55:12,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=693, Unknown=7, NotChecked=0, Total=812 [2022-12-13 17:55:13,944 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 502 [2022-12-13 17:55:13,946 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 345 transitions, 3818 flow. Second operand has 29 states, 29 states have (on average 153.3448275862069) internal successors, (4447), 29 states have internal predecessors, (4447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:55:13,946 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:55:13,946 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 502 [2022-12-13 17:55:13,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:55:24,939 INFO L130 PetriNetUnfolder]: 35597/56247 cut-off events. [2022-12-13 17:55:24,939 INFO L131 PetriNetUnfolder]: For 369828/370273 co-relation queries the response was YES. [2022-12-13 17:55:25,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 270608 conditions, 56247 events. 35597/56247 cut-off events. For 369828/370273 co-relation queries the response was YES. Maximal size of possible extension queue 2075. Compared 443253 event pairs, 12866 based on Foata normal form. 613/49089 useless extension candidates. Maximal degree in co-relation 270552. Up to 29634 conditions per place. [2022-12-13 17:55:25,425 INFO L137 encePairwiseOnDemand]: 485/502 looper letters, 333 selfloop transitions, 191 changer transitions 0/526 dead transitions. [2022-12-13 17:55:25,425 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 526 transitions, 6712 flow [2022-12-13 17:55:25,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 17:55:25,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-12-13 17:55:25,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3158 transitions. [2022-12-13 17:55:25,429 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.31454183266932273 [2022-12-13 17:55:25,429 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3158 transitions. [2022-12-13 17:55:25,430 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3158 transitions. [2022-12-13 17:55:25,430 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:55:25,430 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3158 transitions. [2022-12-13 17:55:25,433 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 157.9) internal successors, (3158), 20 states have internal predecessors, (3158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:55:25,438 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 502.0) internal successors, (10542), 21 states have internal predecessors, (10542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:55:25,439 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 502.0) internal successors, (10542), 21 states have internal predecessors, (10542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:55:25,439 INFO L175 Difference]: Start difference. First operand has 196 places, 345 transitions, 3818 flow. Second operand 20 states and 3158 transitions. [2022-12-13 17:55:25,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 526 transitions, 6712 flow [2022-12-13 17:55:33,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 526 transitions, 6452 flow, removed 104 selfloop flow, removed 8 redundant places. [2022-12-13 17:55:33,084 INFO L231 Difference]: Finished difference. Result has 216 places, 444 transitions, 5589 flow [2022-12-13 17:55:33,084 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=3612, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=5589, PETRI_PLACES=216, PETRI_TRANSITIONS=444} [2022-12-13 17:55:33,085 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, 166 predicate places. [2022-12-13 17:55:33,085 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 444 transitions, 5589 flow [2022-12-13 17:55:33,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 153.3448275862069) internal successors, (4447), 29 states have internal predecessors, (4447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:55:33,085 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:55:33,085 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:55:33,089 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-13 17:55:33,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:55:33,287 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2022-12-13 17:55:33,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:55:33,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1823965128, now seen corresponding path program 2 times [2022-12-13 17:55:33,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:55:33,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083361299] [2022-12-13 17:55:33,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:55:33,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:55:33,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:55:33,780 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 17:55:33,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:55:33,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083361299] [2022-12-13 17:55:33,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083361299] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:55:33,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358397191] [2022-12-13 17:55:33,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:55:33,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:55:33,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:55:33,782 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:55:33,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-13 17:55:33,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 17:55:33,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:55:33,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-13 17:55:33,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:55:33,925 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 [2022-12-13 17:55:33,936 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 17:55:33,936 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 17:55:33,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358397191] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:55:33,936 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 17:55:33,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 11 [2022-12-13 17:55:33,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581918203] [2022-12-13 17:55:33,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:55:33,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 17:55:33,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:55:33,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 17:55:33,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-12-13 17:55:33,986 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 502 [2022-12-13 17:55:33,987 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 444 transitions, 5589 flow. Second operand has 6 states, 6 states have (on average 202.0) internal successors, (1212), 6 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:55:33,987 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:55:33,987 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 502 [2022-12-13 17:55:33,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:55:44,264 INFO L130 PetriNetUnfolder]: 37644/59848 cut-off events. [2022-12-13 17:55:44,265 INFO L131 PetriNetUnfolder]: For 528299/528765 co-relation queries the response was YES. [2022-12-13 17:55:44,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 313780 conditions, 59848 events. 37644/59848 cut-off events. For 528299/528765 co-relation queries the response was YES. Maximal size of possible extension queue 2255. Compared 478835 event pairs, 16834 based on Foata normal form. 596/52030 useless extension candidates. Maximal degree in co-relation 313714. Up to 54199 conditions per place. [2022-12-13 17:55:44,838 INFO L137 encePairwiseOnDemand]: 494/502 looper letters, 415 selfloop transitions, 103 changer transitions 0/520 dead transitions. [2022-12-13 17:55:44,838 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 520 transitions, 7336 flow [2022-12-13 17:55:44,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 17:55:44,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 17:55:44,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1270 transitions. [2022-12-13 17:55:44,840 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4216467463479416 [2022-12-13 17:55:44,840 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1270 transitions. [2022-12-13 17:55:44,840 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1270 transitions. [2022-12-13 17:55:44,841 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:55:44,841 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1270 transitions. [2022-12-13 17:55:44,842 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 211.66666666666666) internal successors, (1270), 6 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:55:44,844 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 502.0) internal successors, (3514), 7 states have internal predecessors, (3514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:55:44,844 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 502.0) internal successors, (3514), 7 states have internal predecessors, (3514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:55:44,844 INFO L175 Difference]: Start difference. First operand has 216 places, 444 transitions, 5589 flow. Second operand 6 states and 1270 transitions. [2022-12-13 17:55:44,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 520 transitions, 7336 flow [2022-12-13 17:55:58,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 520 transitions, 7155 flow, removed 59 selfloop flow, removed 6 redundant places. [2022-12-13 17:55:58,893 INFO L231 Difference]: Finished difference. Result has 218 places, 462 transitions, 5991 flow [2022-12-13 17:55:58,893 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=5395, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5991, PETRI_PLACES=218, PETRI_TRANSITIONS=462} [2022-12-13 17:55:58,893 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, 168 predicate places. [2022-12-13 17:55:58,893 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 462 transitions, 5991 flow [2022-12-13 17:55:58,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 202.0) internal successors, (1212), 6 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:55:58,894 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:55:58,894 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:55:58,898 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-13 17:55:59,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:55:59,096 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2022-12-13 17:55:59,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:55:59,097 INFO L85 PathProgramCache]: Analyzing trace with hash 140926270, now seen corresponding path program 2 times [2022-12-13 17:55:59,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:55:59,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369433541] [2022-12-13 17:55:59,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:55:59,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:55:59,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:55:59,538 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 17:55:59,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:55:59,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369433541] [2022-12-13 17:55:59,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369433541] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:55:59,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379276570] [2022-12-13 17:55:59,539 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:55:59,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:55:59,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:55:59,540 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:55:59,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-13 17:55:59,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 17:55:59,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:55:59,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-13 17:55:59,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:55:59,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:55:59,731 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 [2022-12-13 17:55:59,757 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 [2022-12-13 17:55:59,773 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 17:55:59,774 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 17:55:59,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379276570] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:55:59,774 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 17:55:59,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 13 [2022-12-13 17:55:59,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048923410] [2022-12-13 17:55:59,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:55:59,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 17:55:59,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:55:59,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 17:55:59,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-12-13 17:55:59,930 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 502 [2022-12-13 17:55:59,931 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 462 transitions, 5991 flow. Second operand has 8 states, 8 states have (on average 194.625) internal successors, (1557), 8 states have internal predecessors, (1557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:55:59,931 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:55:59,931 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 502 [2022-12-13 17:55:59,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:56:10,606 INFO L130 PetriNetUnfolder]: 37212/59038 cut-off events. [2022-12-13 17:56:10,607 INFO L131 PetriNetUnfolder]: For 521304/521770 co-relation queries the response was YES. [2022-12-13 17:56:11,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 313059 conditions, 59038 events. 37212/59038 cut-off events. For 521304/521770 co-relation queries the response was YES. Maximal size of possible extension queue 2216. Compared 471228 event pairs, 13628 based on Foata normal form. 596/51436 useless extension candidates. Maximal degree in co-relation 312989. Up to 49577 conditions per place. [2022-12-13 17:56:11,217 INFO L137 encePairwiseOnDemand]: 494/502 looper letters, 423 selfloop transitions, 95 changer transitions 0/520 dead transitions. [2022-12-13 17:56:11,217 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 520 transitions, 7523 flow [2022-12-13 17:56:11,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 17:56:11,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 17:56:11,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1421 transitions. [2022-12-13 17:56:11,219 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4043824701195219 [2022-12-13 17:56:11,219 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1421 transitions. [2022-12-13 17:56:11,219 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1421 transitions. [2022-12-13 17:56:11,220 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:56:11,220 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1421 transitions. [2022-12-13 17:56:11,221 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 203.0) internal successors, (1421), 7 states have internal predecessors, (1421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:56:11,223 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 502.0) internal successors, (4016), 8 states have internal predecessors, (4016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:56:11,223 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 502.0) internal successors, (4016), 8 states have internal predecessors, (4016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:56:11,223 INFO L175 Difference]: Start difference. First operand has 218 places, 462 transitions, 5991 flow. Second operand 7 states and 1421 transitions. [2022-12-13 17:56:11,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 520 transitions, 7523 flow [2022-12-13 17:56:23,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 520 transitions, 7329 flow, removed 44 selfloop flow, removed 2 redundant places. [2022-12-13 17:56:23,466 INFO L231 Difference]: Finished difference. Result has 223 places, 462 transitions, 6003 flow [2022-12-13 17:56:23,466 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=5797, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6003, PETRI_PLACES=223, PETRI_TRANSITIONS=462} [2022-12-13 17:56:23,466 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, 173 predicate places. [2022-12-13 17:56:23,467 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 462 transitions, 6003 flow [2022-12-13 17:56:23,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 194.625) internal successors, (1557), 8 states have internal predecessors, (1557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:56:23,467 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:56:23,467 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:56:23,471 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-13 17:56:23,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-12-13 17:56:23,669 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2022-12-13 17:56:23,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:56:23,670 INFO L85 PathProgramCache]: Analyzing trace with hash -677249159, now seen corresponding path program 1 times [2022-12-13 17:56:23,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:56:23,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829362878] [2022-12-13 17:56:23,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:56:23,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:56:23,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:56:24,205 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 17:56:24,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:56:24,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829362878] [2022-12-13 17:56:24,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829362878] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:56:24,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765413503] [2022-12-13 17:56:24,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:56:24,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:56:24,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:56:24,207 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:56:24,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-13 17:56:24,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:56:24,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-13 17:56:24,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:56:24,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:56:24,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:56:24,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:56:24,361 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-12-13 17:56:24,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2022-12-13 17:56:24,411 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 11 treesize of output 7 [2022-12-13 17:56:24,452 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 17:56:24,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-13 17:56:24,491 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 14 treesize of output 16 [2022-12-13 17:56:24,512 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 14 treesize of output 16 [2022-12-13 17:56:24,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:56:24,548 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 14 treesize of output 16 [2022-12-13 17:56:24,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:56:24,601 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 14 treesize of output 16 [2022-12-13 17:56:24,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:56:24,664 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 14 treesize of output 16 [2022-12-13 17:56:24,725 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 17:56:24,727 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:56:24,728 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 17 treesize of output 10 [2022-12-13 17:56:24,748 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:56:24,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:56:25,146 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:56:25,147 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 35 treesize of output 36 [2022-12-13 17:56:25,156 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:56:25,156 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 307 treesize of output 303 [2022-12-13 17:56:25,161 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 288 treesize of output 276 [2022-12-13 17:56:25,166 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 276 treesize of output 252 [2022-12-13 17:56:25,170 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 252 treesize of output 204 [2022-12-13 17:56:25,176 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 104 treesize of output 98 [2022-12-13 17:56:25,485 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:56:25,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765413503] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:56:25,485 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:56:25,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 28 [2022-12-13 17:56:25,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385075264] [2022-12-13 17:56:25,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:56:25,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-13 17:56:25,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:56:25,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-13 17:56:25,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=748, Unknown=12, NotChecked=0, Total=870 [2022-12-13 17:56:26,268 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 502 [2022-12-13 17:56:26,270 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 462 transitions, 6003 flow. Second operand has 30 states, 30 states have (on average 143.46666666666667) internal successors, (4304), 30 states have internal predecessors, (4304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:56:26,270 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:56:26,270 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 502 [2022-12-13 17:56:26,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:56:42,147 WARN L233 SmtUtils]: Spent 8.36s on a formula simplification that was a NOOP. DAG size: 113 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 17:56:57,238 WARN L233 SmtUtils]: Spent 8.21s on a formula simplification. DAG size of input: 127 DAG size of output: 92 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 17:57:11,991 WARN L233 SmtUtils]: Spent 14.66s on a formula simplification. DAG size of input: 134 DAG size of output: 120 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 17:57:29,447 WARN L233 SmtUtils]: Spent 8.68s on a formula simplification. DAG size of input: 135 DAG size of output: 121 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 17:57:36,834 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:57:38,870 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:57:55,459 INFO L130 PetriNetUnfolder]: 60810/97540 cut-off events. [2022-12-13 17:57:55,459 INFO L131 PetriNetUnfolder]: For 910893/910893 co-relation queries the response was YES. [2022-12-13 17:57:56,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 517229 conditions, 97540 events. 60810/97540 cut-off events. For 910893/910893 co-relation queries the response was YES. Maximal size of possible extension queue 3698. Compared 855575 event pairs, 12857 based on Foata normal form. 480/85270 useless extension candidates. Maximal degree in co-relation 517158. Up to 37057 conditions per place. [2022-12-13 17:57:56,729 INFO L137 encePairwiseOnDemand]: 486/502 looper letters, 556 selfloop transitions, 390 changer transitions 2/948 dead transitions. [2022-12-13 17:57:56,729 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 948 transitions, 12294 flow [2022-12-13 17:57:56,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-12-13 17:57:56,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-12-13 17:57:56,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 5882 transitions. [2022-12-13 17:57:56,736 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3004392685667586 [2022-12-13 17:57:56,736 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 5882 transitions. [2022-12-13 17:57:56,736 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 5882 transitions. [2022-12-13 17:57:56,738 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:57:56,738 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 5882 transitions. [2022-12-13 17:57:56,748 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 150.82051282051282) internal successors, (5882), 39 states have internal predecessors, (5882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:57:56,762 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 502.0) internal successors, (20080), 40 states have internal predecessors, (20080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:57:56,764 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 502.0) internal successors, (20080), 40 states have internal predecessors, (20080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:57:56,764 INFO L175 Difference]: Start difference. First operand has 223 places, 462 transitions, 6003 flow. Second operand 39 states and 5882 transitions. [2022-12-13 17:57:56,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 948 transitions, 12294 flow [2022-12-13 17:58:13,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 948 transitions, 12022 flow, removed 9 selfloop flow, removed 6 redundant places. [2022-12-13 17:58:13,194 INFO L231 Difference]: Finished difference. Result has 273 places, 669 transitions, 10169 flow [2022-12-13 17:58:13,194 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=5805, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=10169, PETRI_PLACES=273, PETRI_TRANSITIONS=669} [2022-12-13 17:58:13,195 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, 223 predicate places. [2022-12-13 17:58:13,195 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 669 transitions, 10169 flow [2022-12-13 17:58:13,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 143.46666666666667) internal successors, (4304), 30 states have internal predecessors, (4304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:58:13,195 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:58:13,195 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:58:13,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-12-13 17:58:13,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-12-13 17:58:13,397 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2022-12-13 17:58:13,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:58:13,398 INFO L85 PathProgramCache]: Analyzing trace with hash -691901683, now seen corresponding path program 2 times [2022-12-13 17:58:13,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:58:13,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470246003] [2022-12-13 17:58:13,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:58:13,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:58:13,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:58:13,750 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 17:58:13,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:58:13,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470246003] [2022-12-13 17:58:13,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470246003] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:58:13,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675865926] [2022-12-13 17:58:13,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:58:13,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:58:13,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:58:13,752 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:58:13,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-13 17:58:13,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 17:58:13,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:58:13,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 17:58:13,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:58:13,908 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 [2022-12-13 17:58:13,919 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 17:58:13,919 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 17:58:13,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675865926] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:58:13,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 17:58:13,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2022-12-13 17:58:13,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753901499] [2022-12-13 17:58:13,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:58:13,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 17:58:13,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:58:13,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 17:58:13,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-12-13 17:58:13,984 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 502 [2022-12-13 17:58:13,985 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 669 transitions, 10169 flow. Second operand has 6 states, 6 states have (on average 202.16666666666666) internal successors, (1213), 6 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:58:13,985 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:58:13,985 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 502 [2022-12-13 17:58:13,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:58:35,972 INFO L130 PetriNetUnfolder]: 61956/99642 cut-off events. [2022-12-13 17:58:35,972 INFO L131 PetriNetUnfolder]: For 1346384/1346812 co-relation queries the response was YES. [2022-12-13 17:58:37,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 600620 conditions, 99642 events. 61956/99642 cut-off events. For 1346384/1346812 co-relation queries the response was YES. Maximal size of possible extension queue 3878. Compared 873881 event pairs, 29770 based on Foata normal form. 751/86981 useless extension candidates. Maximal degree in co-relation 600531. Up to 86346 conditions per place. [2022-12-13 17:58:37,539 INFO L137 encePairwiseOnDemand]: 495/502 looper letters, 634 selfloop transitions, 112 changer transitions 0/748 dead transitions. [2022-12-13 17:58:37,539 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 748 transitions, 12633 flow [2022-12-13 17:58:37,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 17:58:37,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 17:58:37,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1064 transitions. [2022-12-13 17:58:37,542 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4239043824701195 [2022-12-13 17:58:37,542 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1064 transitions. [2022-12-13 17:58:37,542 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1064 transitions. [2022-12-13 17:58:37,542 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:58:37,543 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1064 transitions. [2022-12-13 17:58:37,544 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 212.8) internal successors, (1064), 5 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:58:37,546 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 502.0) internal successors, (3012), 6 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:58:37,546 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 502.0) internal successors, (3012), 6 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:58:37,546 INFO L175 Difference]: Start difference. First operand has 273 places, 669 transitions, 10169 flow. Second operand 5 states and 1064 transitions. [2022-12-13 17:58:37,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 748 transitions, 12633 flow [2022-12-13 17:59:39,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 748 transitions, 11955 flow, removed 310 selfloop flow, removed 6 redundant places. [2022-12-13 17:59:39,324 INFO L231 Difference]: Finished difference. Result has 272 places, 674 transitions, 9877 flow [2022-12-13 17:59:39,324 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=9549, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=669, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=557, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=9877, PETRI_PLACES=272, PETRI_TRANSITIONS=674} [2022-12-13 17:59:39,324 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, 222 predicate places. [2022-12-13 17:59:39,324 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 674 transitions, 9877 flow [2022-12-13 17:59:39,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 202.16666666666666) internal successors, (1213), 6 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:59:39,324 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:59:39,324 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:59:39,328 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-12-13 17:59:39,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-12-13 17:59:39,526 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2022-12-13 17:59:39,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:59:39,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1100926672, now seen corresponding path program 2 times [2022-12-13 17:59:39,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:59:39,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534943805] [2022-12-13 17:59:39,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:59:39,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:59:39,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:59:40,208 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:59:40,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:59:40,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534943805] [2022-12-13 17:59:40,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534943805] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:59:40,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516810392] [2022-12-13 17:59:40,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:59:40,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:59:40,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:59:40,210 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:59:40,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-13 17:59:40,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 17:59:40,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:59:40,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 17:59:40,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:59:40,388 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 [2022-12-13 17:59:40,405 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 17:59:40,405 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 17:59:40,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516810392] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:59:40,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 17:59:40,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 14 [2022-12-13 17:59:40,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906238819] [2022-12-13 17:59:40,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:59:40,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 17:59:40,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:59:40,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 17:59:40,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2022-12-13 17:59:40,478 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 502 [2022-12-13 17:59:40,479 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 674 transitions, 9877 flow. Second operand has 6 states, 6 states have (on average 202.16666666666666) internal successors, (1213), 6 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:59:40,479 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:59:40,479 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 502 [2022-12-13 17:59:40,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:00:02,554 INFO L130 PetriNetUnfolder]: 58782/94970 cut-off events. [2022-12-13 18:00:02,554 INFO L131 PetriNetUnfolder]: For 1168193/1168610 co-relation queries the response was YES. [2022-12-13 18:00:03,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 539491 conditions, 94970 events. 58782/94970 cut-off events. For 1168193/1168610 co-relation queries the response was YES. Maximal size of possible extension queue 3701. Compared 835183 event pairs, 24781 based on Foata normal form. 3034/85283 useless extension candidates. Maximal degree in co-relation 539401. Up to 82009 conditions per place. [2022-12-13 18:00:03,992 INFO L137 encePairwiseOnDemand]: 494/502 looper letters, 591 selfloop transitions, 129 changer transitions 0/722 dead transitions. [2022-12-13 18:00:03,992 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 722 transitions, 11811 flow [2022-12-13 18:00:03,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 18:00:03,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 18:00:03,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1065 transitions. [2022-12-13 18:00:03,995 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4243027888446215 [2022-12-13 18:00:03,995 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1065 transitions. [2022-12-13 18:00:03,995 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1065 transitions. [2022-12-13 18:00:03,995 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:00:03,995 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1065 transitions. [2022-12-13 18:00:03,996 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 213.0) internal successors, (1065), 5 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:00:03,998 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 502.0) internal successors, (3012), 6 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:00:03,998 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 502.0) internal successors, (3012), 6 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:00:03,998 INFO L175 Difference]: Start difference. First operand has 272 places, 674 transitions, 9877 flow. Second operand 5 states and 1065 transitions. [2022-12-13 18:00:03,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 722 transitions, 11811 flow [2022-12-13 18:00:40,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 722 transitions, 11587 flow, removed 3 selfloop flow, removed 4 redundant places. [2022-12-13 18:00:40,093 INFO L231 Difference]: Finished difference. Result has 273 places, 669 transitions, 9897 flow [2022-12-13 18:00:40,093 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=9512, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=9897, PETRI_PLACES=273, PETRI_TRANSITIONS=669} [2022-12-13 18:00:40,093 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, 223 predicate places. [2022-12-13 18:00:40,093 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 669 transitions, 9897 flow [2022-12-13 18:00:40,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 202.16666666666666) internal successors, (1213), 6 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:00:40,094 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:00:40,094 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:00:40,098 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-12-13 18:00:40,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-13 18:00:40,295 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2022-12-13 18:00:40,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:00:40,296 INFO L85 PathProgramCache]: Analyzing trace with hash -775018416, now seen corresponding path program 3 times [2022-12-13 18:00:40,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:00:40,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930632000] [2022-12-13 18:00:40,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:00:40,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:00:40,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:00:41,088 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:00:41,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:00:41,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930632000] [2022-12-13 18:00:41,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930632000] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:00:41,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389080517] [2022-12-13 18:00:41,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 18:00:41,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:00:41,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:00:41,090 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:00:41,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-13 18:00:41,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-12-13 18:00:41,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:00:41,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 18:00:41,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:00:41,280 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 [2022-12-13 18:00:41,298 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 18:00:41,298 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:00:41,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389080517] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:00:41,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 18:00:41,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 14 [2022-12-13 18:00:41,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603257481] [2022-12-13 18:00:41,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:00:41,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 18:00:41,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:00:41,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 18:00:41,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2022-12-13 18:00:41,375 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 502 [2022-12-13 18:00:41,375 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 669 transitions, 9897 flow. Second operand has 6 states, 6 states have (on average 202.16666666666666) internal successors, (1213), 6 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:00:41,376 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:00:41,376 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 502 [2022-12-13 18:00:41,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:01:03,443 INFO L130 PetriNetUnfolder]: 58317/94097 cut-off events. [2022-12-13 18:01:03,444 INFO L131 PetriNetUnfolder]: For 1144659/1145076 co-relation queries the response was YES. [2022-12-13 18:01:04,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 542561 conditions, 94097 events. 58317/94097 cut-off events. For 1144659/1145076 co-relation queries the response was YES. Maximal size of possible extension queue 3654. Compared 823952 event pairs, 29120 based on Foata normal form. 584/82188 useless extension candidates. Maximal degree in co-relation 542471. Up to 81674 conditions per place. [2022-12-13 18:01:04,857 INFO L137 encePairwiseOnDemand]: 495/502 looper letters, 618 selfloop transitions, 112 changer transitions 0/732 dead transitions. [2022-12-13 18:01:04,857 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 732 transitions, 12084 flow [2022-12-13 18:01:04,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 18:01:04,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 18:01:04,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1063 transitions. [2022-12-13 18:01:04,860 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4235059760956175 [2022-12-13 18:01:04,860 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1063 transitions. [2022-12-13 18:01:04,860 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1063 transitions. [2022-12-13 18:01:04,860 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:01:04,860 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1063 transitions. [2022-12-13 18:01:04,862 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 212.6) internal successors, (1063), 5 states have internal predecessors, (1063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:04,864 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 502.0) internal successors, (3012), 6 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:04,864 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 502.0) internal successors, (3012), 6 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:04,864 INFO L175 Difference]: Start difference. First operand has 273 places, 669 transitions, 9897 flow. Second operand 5 states and 1063 transitions. [2022-12-13 18:01:04,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 732 transitions, 12084 flow [2022-12-13 18:01:43,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 732 transitions, 11848 flow, removed 10 selfloop flow, removed 3 redundant places. [2022-12-13 18:01:43,034 INFO L231 Difference]: Finished difference. Result has 275 places, 669 transitions, 9916 flow [2022-12-13 18:01:43,034 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=9661, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=669, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=557, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=9916, PETRI_PLACES=275, PETRI_TRANSITIONS=669} [2022-12-13 18:01:43,034 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, 225 predicate places. [2022-12-13 18:01:43,034 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 669 transitions, 9916 flow [2022-12-13 18:01:43,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 202.16666666666666) internal successors, (1213), 6 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:43,035 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:01:43,035 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:01:43,039 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-12-13 18:01:43,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-12-13 18:01:43,236 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2022-12-13 18:01:43,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:01:43,237 INFO L85 PathProgramCache]: Analyzing trace with hash -967265650, now seen corresponding path program 1 times [2022-12-13 18:01:43,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:01:43,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924579043] [2022-12-13 18:01:43,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:01:43,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:01:43,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:01:43,329 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 18:01:43,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:01:43,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924579043] [2022-12-13 18:01:43,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924579043] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:01:43,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352851275] [2022-12-13 18:01:43,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:01:43,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:01:43,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:01:43,331 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:01:43,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-13 18:01:43,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:01:43,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 18:01:43,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:01:43,453 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 18:01:43,453 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:01:43,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352851275] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:01:43,453 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 18:01:43,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-12-13 18:01:43,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176751716] [2022-12-13 18:01:43,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:01:43,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 18:01:43,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:01:43,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 18:01:43,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 18:01:43,458 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 502 [2022-12-13 18:01:43,459 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 669 transitions, 9916 flow. Second operand has 4 states, 4 states have (on average 216.5) internal successors, (866), 4 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:43,459 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:01:43,459 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 502 [2022-12-13 18:01:43,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:02:06,387 INFO L130 PetriNetUnfolder]: 59181/97168 cut-off events. [2022-12-13 18:02:06,387 INFO L131 PetriNetUnfolder]: For 1298991/1299408 co-relation queries the response was YES. [2022-12-13 18:02:07,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 563989 conditions, 97168 events. 59181/97168 cut-off events. For 1298991/1299408 co-relation queries the response was YES. Maximal size of possible extension queue 3678. Compared 879458 event pairs, 18747 based on Foata normal form. 5041/89014 useless extension candidates. Maximal degree in co-relation 563898. Up to 40476 conditions per place. [2022-12-13 18:02:07,727 INFO L137 encePairwiseOnDemand]: 498/502 looper letters, 712 selfloop transitions, 145 changer transitions 0/859 dead transitions. [2022-12-13 18:02:07,727 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 859 transitions, 14499 flow [2022-12-13 18:02:07,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 18:02:07,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 18:02:07,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 924 transitions. [2022-12-13 18:02:07,729 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4601593625498008 [2022-12-13 18:02:07,729 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 924 transitions. [2022-12-13 18:02:07,729 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 924 transitions. [2022-12-13 18:02:07,729 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:02:07,729 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 924 transitions. [2022-12-13 18:02:07,730 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 231.0) internal successors, (924), 4 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:02:07,731 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 502.0) internal successors, (2510), 5 states have internal predecessors, (2510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:02:07,731 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 502.0) internal successors, (2510), 5 states have internal predecessors, (2510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:02:07,731 INFO L175 Difference]: Start difference. First operand has 275 places, 669 transitions, 9916 flow. Second operand 4 states and 924 transitions. [2022-12-13 18:02:07,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 859 transitions, 14499 flow [2022-12-13 18:02:34,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 859 transitions, 14281 flow, removed 7 selfloop flow, removed 5 redundant places. [2022-12-13 18:02:34,467 INFO L231 Difference]: Finished difference. Result has 274 places, 652 transitions, 10160 flow [2022-12-13 18:02:34,467 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=8926, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=472, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=10160, PETRI_PLACES=274, PETRI_TRANSITIONS=652} [2022-12-13 18:02:34,468 INFO L288 CegarLoopForPetriNet]: 50 programPoint places, 224 predicate places. [2022-12-13 18:02:34,468 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 652 transitions, 10160 flow [2022-12-13 18:02:34,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 216.5) internal successors, (866), 4 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:02:34,468 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:02:34,468 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:02:34,472 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-12-13 18:02:34,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-12-13 18:02:34,670 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2022-12-13 18:02:34,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:02:34,671 INFO L85 PathProgramCache]: Analyzing trace with hash -773980536, now seen corresponding path program 4 times [2022-12-13 18:02:34,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:02:34,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088107120] [2022-12-13 18:02:34,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:02:34,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:02:34,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:02:35,083 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 18:02:35,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:02:35,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088107120] [2022-12-13 18:02:35,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088107120] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:02:35,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514726486] [2022-12-13 18:02:35,084 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 18:02:35,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:02:35,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:02:35,085 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:02:35,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b81e8a4-b27e-467e-a340-2f7c63dc1f79/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-13 18:02:35,208 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 18:02:35,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:02:35,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-13 18:02:35,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:02:35,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:02:35,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:02:35,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:02:35,241 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-12-13 18:02:35,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2022-12-13 18:02:35,284 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 11 treesize of output 7 [2022-12-13 18:02:35,342 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 18:02:35,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-13 18:02:35,378 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 14 treesize of output 16 [2022-12-13 18:02:35,396 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 14 treesize of output 16 [2022-12-13 18:02:35,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:02:35,438 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 14 treesize of output 16 [2022-12-13 18:02:35,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:02:35,482 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 14 treesize of output 16 [2022-12-13 18:02:35,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:02:35,582 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 14 treesize of output 16 [2022-12-13 18:02:35,607 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 18:02:35,609 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:02:35,609 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 17 treesize of output 10 [2022-12-13 18:02:35,627 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:02:35,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:02:35,664 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1414 (Array Int Int))) (< (+ c_~s~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1414) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset))) 2147483648)) is different from false [2022-12-13 18:02:35,965 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:02:35,965 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 35 treesize of output 36 [2022-12-13 18:02:35,978 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:02:35,979 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 4897 treesize of output 4773 [2022-12-13 18:02:36,003 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 4758 treesize of output 3990 [2022-12-13 18:02:36,026 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 3990 treesize of output 3606 [2022-12-13 18:02:36,055 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 1899 treesize of output 1707 [2022-12-13 18:02:36,078 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 3414 treesize of output 3318