./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-send-receive.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_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/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_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-send-receive.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/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_6fff60c6-4118-469f-9b39-d9f939106c41/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 238e609d3671ff2de494998b0abc6a14651375b5eb423e7b66fc3d987b466268 --- 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 12:19:55,974 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 12:19:55,976 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 12:19:55,996 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 12:19:55,997 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 12:19:55,998 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 12:19:55,999 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 12:19:56,001 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 12:19:56,003 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 12:19:56,003 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 12:19:56,004 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 12:19:56,006 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 12:19:56,006 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 12:19:56,007 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 12:19:56,008 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 12:19:56,009 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 12:19:56,010 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 12:19:56,011 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 12:19:56,013 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 12:19:56,015 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 12:19:56,016 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 12:19:56,018 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 12:19:56,019 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 12:19:56,020 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 12:19:56,023 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 12:19:56,024 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 12:19:56,024 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 12:19:56,025 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 12:19:56,025 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 12:19:56,026 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 12:19:56,027 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 12:19:56,027 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 12:19:56,028 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 12:19:56,029 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 12:19:56,030 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 12:19:56,030 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 12:19:56,031 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 12:19:56,031 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 12:19:56,031 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 12:19:56,032 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 12:19:56,033 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 12:19:56,034 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-12-13 12:19:56,056 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 12:19:56,056 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 12:19:56,056 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 12:19:56,056 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 12:19:56,057 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 12:19:56,057 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 12:19:56,058 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 12:19:56,058 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 12:19:56,058 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 12:19:56,058 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 12:19:56,059 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 12:19:56,059 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 12:19:56,059 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 12:19:56,059 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 12:19:56,059 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 12:19:56,060 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 12:19:56,060 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 12:19:56,060 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 12:19:56,060 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-12-13 12:19:56,060 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 12:19:56,060 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 12:19:56,061 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 12:19:56,061 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 12:19:56,061 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 12:19:56,061 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 12:19:56,061 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 12:19:56,062 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 12:19:56,062 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 12:19:56,062 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 12:19:56,062 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 12:19:56,062 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 12:19:56,063 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 12:19:56,063 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 12:19:56,063 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 12:19:56,063 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 12:19:56,063 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 12:19:56,063 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 12:19:56,064 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_6fff60c6-4118-469f-9b39-d9f939106c41/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 238e609d3671ff2de494998b0abc6a14651375b5eb423e7b66fc3d987b466268 [2022-12-13 12:19:56,260 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 12:19:56,280 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 12:19:56,283 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 12:19:56,284 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 12:19:56,284 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 12:19:56,285 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/popl20-send-receive.wvr.c [2022-12-13 12:19:58,774 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 12:19:58,941 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 12:19:58,942 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/sv-benchmarks/c/weaver/popl20-send-receive.wvr.c [2022-12-13 12:19:58,948 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/data/2edea6ea0/ec67862dadae470995b66c6f35e5c2f5/FLAG40c37ee8d [2022-12-13 12:19:59,347 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/data/2edea6ea0/ec67862dadae470995b66c6f35e5c2f5 [2022-12-13 12:19:59,350 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 12:19:59,351 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 12:19:59,352 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 12:19:59,353 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 12:19:59,355 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 12:19:59,356 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 12:19:59" (1/1) ... [2022-12-13 12:19:59,357 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ba2bce5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:19:59, skipping insertion in model container [2022-12-13 12:19:59,357 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 12:19:59" (1/1) ... [2022-12-13 12:19:59,362 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 12:19:59,379 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 12:19:59,496 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 12:19:59,497 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 12:19:59,497 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 12:19:59,501 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 12:19:59,502 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 12:19:59,502 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 12:19:59,506 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 12:19:59,507 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 12:19:59,508 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 12:19:59,509 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 12:19:59,509 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 12:19:59,510 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 12:19:59,511 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 12:19:59,511 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 12:19:59,512 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 12:19:59,513 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 12:19:59,520 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_6fff60c6-4118-469f-9b39-d9f939106c41/sv-benchmarks/c/weaver/popl20-send-receive.wvr.c[3107,3120] [2022-12-13 12:19:59,526 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 12:19:59,535 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 12:19:59,545 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 12:19:59,545 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 12:19:59,546 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 12:19:59,547 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 12:19:59,547 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 12:19:59,548 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 12:19:59,549 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 12:19:59,549 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 12:19:59,550 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 12:19:59,551 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 12:19:59,551 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 12:19:59,552 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 12:19:59,552 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 12:19:59,552 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 12:19:59,553 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 12:19:59,554 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 12:19:59,556 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_6fff60c6-4118-469f-9b39-d9f939106c41/sv-benchmarks/c/weaver/popl20-send-receive.wvr.c[3107,3120] [2022-12-13 12:19:59,559 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 12:19:59,573 INFO L208 MainTranslator]: Completed translation [2022-12-13 12:19:59,573 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:19:59 WrapperNode [2022-12-13 12:19:59,574 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 12:19:59,575 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 12:19:59,575 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 12:19:59,575 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 12:19:59,582 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:19:59" (1/1) ... [2022-12-13 12:19:59,590 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:19:59" (1/1) ... [2022-12-13 12:19:59,613 INFO L138 Inliner]: procedures = 25, calls = 52, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 171 [2022-12-13 12:19:59,613 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 12:19:59,614 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 12:19:59,614 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 12:19:59,614 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 12:19:59,623 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:19:59" (1/1) ... [2022-12-13 12:19:59,624 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:19:59" (1/1) ... [2022-12-13 12:19:59,627 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:19:59" (1/1) ... [2022-12-13 12:19:59,627 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:19:59" (1/1) ... [2022-12-13 12:19:59,633 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:19:59" (1/1) ... [2022-12-13 12:19:59,637 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:19:59" (1/1) ... [2022-12-13 12:19:59,638 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:19:59" (1/1) ... [2022-12-13 12:19:59,640 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:19:59" (1/1) ... [2022-12-13 12:19:59,642 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 12:19:59,643 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 12:19:59,643 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 12:19:59,644 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 12:19:59,644 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:19:59" (1/1) ... [2022-12-13 12:19:59,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 12:19:59,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:19:59,671 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 12:19:59,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 12:19:59,704 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 12:19:59,705 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 12:19:59,705 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 12:19:59,705 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 12:19:59,705 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 12:19:59,705 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 12:19:59,705 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 12:19:59,705 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 12:19:59,705 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-13 12:19:59,705 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-13 12:19:59,705 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 12:19:59,705 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-13 12:19:59,706 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-13 12:19:59,706 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 12:19:59,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 12:19:59,706 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 12:19:59,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 12:19:59,707 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 12:19:59,782 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 12:19:59,784 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 12:20:00,016 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 12:20:00,111 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 12:20:00,112 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-13 12:20:00,113 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 12:20:00 BoogieIcfgContainer [2022-12-13 12:20:00,113 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 12:20:00,115 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 12:20:00,115 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 12:20:00,118 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 12:20:00,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 12:19:59" (1/3) ... [2022-12-13 12:20:00,118 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d81275b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 12:20:00, skipping insertion in model container [2022-12-13 12:20:00,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:19:59" (2/3) ... [2022-12-13 12:20:00,119 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d81275b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 12:20:00, skipping insertion in model container [2022-12-13 12:20:00,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 12:20:00" (3/3) ... [2022-12-13 12:20:00,120 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-send-receive.wvr.c [2022-12-13 12:20:00,126 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 12:20:00,134 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 12:20:00,134 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2022-12-13 12:20:00,134 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 12:20:00,185 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-13 12:20:00,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 153 places, 153 transitions, 330 flow [2022-12-13 12:20:00,258 INFO L130 PetriNetUnfolder]: 10/150 cut-off events. [2022-12-13 12:20:00,258 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 12:20:00,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163 conditions, 150 events. 10/150 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 142 event pairs, 0 based on Foata normal form. 0/130 useless extension candidates. Maximal degree in co-relation 128. Up to 2 conditions per place. [2022-12-13 12:20:00,263 INFO L82 GeneralOperation]: Start removeDead. Operand has 153 places, 153 transitions, 330 flow [2022-12-13 12:20:00,266 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 134 places, 134 transitions, 280 flow [2022-12-13 12:20:00,269 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 12:20:00,277 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 134 places, 134 transitions, 280 flow [2022-12-13 12:20:00,279 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 134 places, 134 transitions, 280 flow [2022-12-13 12:20:00,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 134 places, 134 transitions, 280 flow [2022-12-13 12:20:00,303 INFO L130 PetriNetUnfolder]: 10/134 cut-off events. [2022-12-13 12:20:00,303 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 12:20:00,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 134 events. 10/134 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 141 event pairs, 0 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 128. Up to 2 conditions per place. [2022-12-13 12:20:00,305 INFO L119 LiptonReduction]: Number of co-enabled transitions 1818 [2022-12-13 12:20:04,863 INFO L134 LiptonReduction]: Checked pairs total: 2727 [2022-12-13 12:20:04,863 INFO L136 LiptonReduction]: Total number of compositions: 137 [2022-12-13 12:20:04,873 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 12:20:04,878 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;@5b3a6ce7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 12:20:04,878 INFO L358 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2022-12-13 12:20:04,879 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2022-12-13 12:20:04,879 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 12:20:04,879 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:20:04,880 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 12:20:04,880 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-12-13 12:20:04,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:20:04,884 INFO L85 PathProgramCache]: Analyzing trace with hash 21537, now seen corresponding path program 1 times [2022-12-13 12:20:04,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:20:04,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787120395] [2022-12-13 12:20:04,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:20:04,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:20:04,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:20:05,078 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 12:20:05,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:20:05,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787120395] [2022-12-13 12:20:05,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787120395] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:20:05,079 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:20:05,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 12:20:05,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474258503] [2022-12-13 12:20:05,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:20:05,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 12:20:05,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:20:05,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 12:20:05,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 12:20:05,118 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 290 [2022-12-13 12:20:05,121 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 30 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 0 states have call successors, (0), 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 12:20:05,121 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:20:05,121 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 290 [2022-12-13 12:20:05,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:20:05,325 INFO L130 PetriNetUnfolder]: 833/1345 cut-off events. [2022-12-13 12:20:05,325 INFO L131 PetriNetUnfolder]: For 72/72 co-relation queries the response was YES. [2022-12-13 12:20:05,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2863 conditions, 1345 events. 833/1345 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 7672 event pairs, 806 based on Foata normal form. 0/797 useless extension candidates. Maximal degree in co-relation 1294. Up to 661 conditions per place. [2022-12-13 12:20:05,334 INFO L137 encePairwiseOnDemand]: 283/290 looper letters, 43 selfloop transitions, 2 changer transitions 0/48 dead transitions. [2022-12-13 12:20:05,334 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 48 transitions, 210 flow [2022-12-13 12:20:05,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 12:20:05,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 12:20:05,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 431 transitions. [2022-12-13 12:20:05,345 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4954022988505747 [2022-12-13 12:20:05,346 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 431 transitions. [2022-12-13 12:20:05,346 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 431 transitions. [2022-12-13 12:20:05,347 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:20:05,349 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 431 transitions. [2022-12-13 12:20:05,351 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 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 12:20:05,355 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 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 12:20:05,355 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 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 12:20:05,357 INFO L175 Difference]: Start difference. First operand has 37 places, 30 transitions, 72 flow. Second operand 3 states and 431 transitions. [2022-12-13 12:20:05,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 48 transitions, 210 flow [2022-12-13 12:20:05,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 48 transitions, 198 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-13 12:20:05,364 INFO L231 Difference]: Finished difference. Result has 33 places, 28 transitions, 74 flow [2022-12-13 12:20:05,365 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=74, PETRI_PLACES=33, PETRI_TRANSITIONS=28} [2022-12-13 12:20:05,367 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, -4 predicate places. [2022-12-13 12:20:05,368 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 28 transitions, 74 flow [2022-12-13 12:20:05,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 0 states have call successors, (0), 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 12:20:05,368 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:20:05,368 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 12:20:05,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 12:20:05,368 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-12-13 12:20:05,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:20:05,369 INFO L85 PathProgramCache]: Analyzing trace with hash 669158, now seen corresponding path program 1 times [2022-12-13 12:20:05,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:20:05,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194496670] [2022-12-13 12:20:05,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:20:05,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:20:05,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:20:05,437 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 12:20:05,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:20:05,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194496670] [2022-12-13 12:20:05,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194496670] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:20:05,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97088242] [2022-12-13 12:20:05,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:20:05,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:20:05,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:20:05,439 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:20:05,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 12:20:05,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:20:05,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 12:20:05,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:20:05,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:20:05,527 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 12:20:05,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97088242] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:20:05,528 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 12:20:05,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 3 [2022-12-13 12:20:05,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281015066] [2022-12-13 12:20:05,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:20:05,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 12:20:05,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:20:05,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 12:20:05,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 12:20:05,546 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 290 [2022-12-13 12:20:05,547 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 28 transitions, 74 flow. Second operand has 4 states, 4 states have (on average 126.75) internal successors, (507), 4 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:20:05,547 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:20:05,547 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 290 [2022-12-13 12:20:05,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:20:05,732 INFO L130 PetriNetUnfolder]: 833/1344 cut-off events. [2022-12-13 12:20:05,732 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 12:20:05,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2839 conditions, 1344 events. 833/1344 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 7683 event pairs, 806 based on Foata normal form. 0/799 useless extension candidates. Maximal degree in co-relation 1417. Up to 659 conditions per place. [2022-12-13 12:20:05,738 INFO L137 encePairwiseOnDemand]: 287/290 looper letters, 42 selfloop transitions, 2 changer transitions 0/47 dead transitions. [2022-12-13 12:20:05,739 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 47 transitions, 204 flow [2022-12-13 12:20:05,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 12:20:05,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 12:20:05,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 549 transitions. [2022-12-13 12:20:05,741 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4732758620689655 [2022-12-13 12:20:05,741 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 549 transitions. [2022-12-13 12:20:05,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 549 transitions. [2022-12-13 12:20:05,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:20:05,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 549 transitions. [2022-12-13 12:20:05,742 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 137.25) internal successors, (549), 4 states have internal predecessors, (549), 0 states have call successors, (0), 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 12:20:05,744 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 290.0) internal successors, (1450), 5 states have internal predecessors, (1450), 0 states have call successors, (0), 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 12:20:05,745 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 290.0) internal successors, (1450), 5 states have internal predecessors, (1450), 0 states have call successors, (0), 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 12:20:05,745 INFO L175 Difference]: Start difference. First operand has 33 places, 28 transitions, 74 flow. Second operand 4 states and 549 transitions. [2022-12-13 12:20:05,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 47 transitions, 204 flow [2022-12-13 12:20:05,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 47 transitions, 202 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 12:20:05,746 INFO L231 Difference]: Finished difference. Result has 34 places, 27 transitions, 72 flow [2022-12-13 12:20:05,746 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=72, PETRI_PLACES=34, PETRI_TRANSITIONS=27} [2022-12-13 12:20:05,746 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, -3 predicate places. [2022-12-13 12:20:05,746 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 27 transitions, 72 flow [2022-12-13 12:20:05,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 126.75) internal successors, (507), 4 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:20:05,747 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:20:05,747 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 12:20:05,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 12:20:05,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-12-13 12:20:05,948 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-12-13 12:20:05,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:20:05,948 INFO L85 PathProgramCache]: Analyzing trace with hash 669169, now seen corresponding path program 1 times [2022-12-13 12:20:05,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:20:05,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581031688] [2022-12-13 12:20:05,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:20:05,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:20:05,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:20:05,998 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 12:20:05,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:20:05,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581031688] [2022-12-13 12:20:05,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581031688] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:20:05,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325350736] [2022-12-13 12:20:05,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:20:05,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:20:05,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:20:06,000 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:20:06,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 12:20:06,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:20:06,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 12:20:06,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:20:06,063 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 12:20:06,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:20:06,076 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 12:20:06,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325350736] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:20:06,077 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:20:06,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2022-12-13 12:20:06,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643883850] [2022-12-13 12:20:06,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:20:06,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 12:20:06,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:20:06,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 12:20:06,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 12:20:06,099 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 290 [2022-12-13 12:20:06,100 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 27 transitions, 72 flow. Second operand has 7 states, 7 states have (on average 127.14285714285714) internal successors, (890), 7 states have internal predecessors, (890), 0 states have call successors, (0), 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 12:20:06,100 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:20:06,101 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 290 [2022-12-13 12:20:06,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:20:06,539 INFO L130 PetriNetUnfolder]: 2081/3357 cut-off events. [2022-12-13 12:20:06,539 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 12:20:06,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7082 conditions, 3357 events. 2081/3357 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 22082 event pairs, 2015 based on Foata normal form. 0/1996 useless extension candidates. Maximal degree in co-relation 5659. Up to 660 conditions per place. [2022-12-13 12:20:06,552 INFO L137 encePairwiseOnDemand]: 287/290 looper letters, 102 selfloop transitions, 5 changer transitions 0/110 dead transitions. [2022-12-13 12:20:06,552 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 110 transitions, 482 flow [2022-12-13 12:20:06,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 12:20:06,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 12:20:06,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 866 transitions. [2022-12-13 12:20:06,554 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49770114942528737 [2022-12-13 12:20:06,554 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 866 transitions. [2022-12-13 12:20:06,554 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 866 transitions. [2022-12-13 12:20:06,555 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:20:06,555 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 866 transitions. [2022-12-13 12:20:06,556 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 144.33333333333334) internal successors, (866), 6 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 12:20:06,559 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 290.0) internal successors, (2030), 7 states have internal predecessors, (2030), 0 states have call successors, (0), 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 12:20:06,559 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 290.0) internal successors, (2030), 7 states have internal predecessors, (2030), 0 states have call successors, (0), 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 12:20:06,559 INFO L175 Difference]: Start difference. First operand has 34 places, 27 transitions, 72 flow. Second operand 6 states and 866 transitions. [2022-12-13 12:20:06,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 110 transitions, 482 flow [2022-12-13 12:20:06,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 110 transitions, 479 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 12:20:06,561 INFO L231 Difference]: Finished difference. Result has 40 places, 30 transitions, 105 flow [2022-12-13 12:20:06,561 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=69, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=105, PETRI_PLACES=40, PETRI_TRANSITIONS=30} [2022-12-13 12:20:06,561 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 3 predicate places. [2022-12-13 12:20:06,562 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 30 transitions, 105 flow [2022-12-13 12:20:06,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 127.14285714285714) internal successors, (890), 7 states have internal predecessors, (890), 0 states have call successors, (0), 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 12:20:06,562 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:20:06,562 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 12:20:06,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-13 12:20:06,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:20:06,763 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-12-13 12:20:06,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:20:06,763 INFO L85 PathProgramCache]: Analyzing trace with hash 642820932, now seen corresponding path program 1 times [2022-12-13 12:20:06,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:20:06,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878703107] [2022-12-13 12:20:06,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:20:06,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:20:06,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:20:06,856 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 12:20:06,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:20:06,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878703107] [2022-12-13 12:20:06,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878703107] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:20:06,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:20:06,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 12:20:06,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354989400] [2022-12-13 12:20:06,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:20:06,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 12:20:06,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:20:06,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 12:20:06,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 12:20:06,867 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 290 [2022-12-13 12:20:06,867 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 30 transitions, 105 flow. Second operand has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 0 states have call successors, (0), 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 12:20:06,868 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:20:06,868 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 290 [2022-12-13 12:20:06,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:20:07,289 INFO L130 PetriNetUnfolder]: 2656/4092 cut-off events. [2022-12-13 12:20:07,289 INFO L131 PetriNetUnfolder]: For 41/41 co-relation queries the response was YES. [2022-12-13 12:20:07,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8371 conditions, 4092 events. 2656/4092 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 24524 event pairs, 895 based on Foata normal form. 0/2292 useless extension candidates. Maximal degree in co-relation 6689. Up to 2921 conditions per place. [2022-12-13 12:20:07,302 INFO L137 encePairwiseOnDemand]: 284/290 looper letters, 35 selfloop transitions, 2 changer transitions 1/41 dead transitions. [2022-12-13 12:20:07,302 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 41 transitions, 206 flow [2022-12-13 12:20:07,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 12:20:07,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 12:20:07,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 407 transitions. [2022-12-13 12:20:07,304 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46781609195402296 [2022-12-13 12:20:07,304 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 407 transitions. [2022-12-13 12:20:07,304 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 407 transitions. [2022-12-13 12:20:07,304 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:20:07,304 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 407 transitions. [2022-12-13 12:20:07,305 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 0 states have call successors, (0), 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 12:20:07,306 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 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 12:20:07,306 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 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 12:20:07,306 INFO L175 Difference]: Start difference. First operand has 40 places, 30 transitions, 105 flow. Second operand 3 states and 407 transitions. [2022-12-13 12:20:07,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 41 transitions, 206 flow [2022-12-13 12:20:07,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 41 transitions, 198 flow, removed 3 selfloop flow, removed 1 redundant places. [2022-12-13 12:20:07,307 INFO L231 Difference]: Finished difference. Result has 42 places, 31 transitions, 115 flow [2022-12-13 12:20:07,307 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=115, PETRI_PLACES=42, PETRI_TRANSITIONS=31} [2022-12-13 12:20:07,308 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 5 predicate places. [2022-12-13 12:20:07,308 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 31 transitions, 115 flow [2022-12-13 12:20:07,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 0 states have call successors, (0), 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 12:20:07,308 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:20:07,308 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-12-13 12:20:07,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 12:20:07,309 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-12-13 12:20:07,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:20:07,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1538450068, now seen corresponding path program 2 times [2022-12-13 12:20:07,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:20:07,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657962287] [2022-12-13 12:20:07,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:20:07,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:20:07,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:20:07,375 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 12:20:07,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:20:07,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657962287] [2022-12-13 12:20:07,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657962287] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:20:07,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968664039] [2022-12-13 12:20:07,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 12:20:07,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:20:07,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:20:07,377 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:20:07,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 12:20:07,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 12:20:07,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:20:07,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 12:20:07,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:20:07,448 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 12:20:07,448 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 12:20:07,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968664039] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:20:07,449 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 12:20:07,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2022-12-13 12:20:07,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149131254] [2022-12-13 12:20:07,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:20:07,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 12:20:07,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:20:07,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 12:20:07,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-12-13 12:20:07,459 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 290 [2022-12-13 12:20:07,460 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 31 transitions, 115 flow. Second operand has 3 states, 3 states have (on average 128.0) internal successors, (384), 3 states have internal predecessors, (384), 0 states have call successors, (0), 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 12:20:07,460 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:20:07,460 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 290 [2022-12-13 12:20:07,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:20:07,807 INFO L130 PetriNetUnfolder]: 2656/3971 cut-off events. [2022-12-13 12:20:07,808 INFO L131 PetriNetUnfolder]: For 443/443 co-relation queries the response was YES. [2022-12-13 12:20:07,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9564 conditions, 3971 events. 2656/3971 cut-off events. For 443/443 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 23573 event pairs, 1855 based on Foata normal form. 1/2592 useless extension candidates. Maximal degree in co-relation 7640. Up to 3886 conditions per place. [2022-12-13 12:20:07,829 INFO L137 encePairwiseOnDemand]: 288/290 looper letters, 26 selfloop transitions, 1 changer transitions 0/30 dead transitions. [2022-12-13 12:20:07,829 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 30 transitions, 159 flow [2022-12-13 12:20:07,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 12:20:07,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 12:20:07,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 404 transitions. [2022-12-13 12:20:07,831 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46436781609195404 [2022-12-13 12:20:07,831 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 404 transitions. [2022-12-13 12:20:07,831 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 404 transitions. [2022-12-13 12:20:07,832 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:20:07,832 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 404 transitions. [2022-12-13 12:20:07,833 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 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 12:20:07,834 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 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 12:20:07,835 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 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 12:20:07,835 INFO L175 Difference]: Start difference. First operand has 42 places, 31 transitions, 115 flow. Second operand 3 states and 404 transitions. [2022-12-13 12:20:07,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 30 transitions, 159 flow [2022-12-13 12:20:07,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 30 transitions, 147 flow, removed 1 selfloop flow, removed 5 redundant places. [2022-12-13 12:20:07,837 INFO L231 Difference]: Finished difference. Result has 38 places, 30 transitions, 95 flow [2022-12-13 12:20:07,837 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=95, PETRI_PLACES=38, PETRI_TRANSITIONS=30} [2022-12-13 12:20:07,837 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 1 predicate places. [2022-12-13 12:20:07,838 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 30 transitions, 95 flow [2022-12-13 12:20:07,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 128.0) internal successors, (384), 3 states have internal predecessors, (384), 0 states have call successors, (0), 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 12:20:07,838 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:20:07,838 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:20:07,842 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 12:20:08,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:20:08,039 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-12-13 12:20:08,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:20:08,039 INFO L85 PathProgramCache]: Analyzing trace with hash -719853519, now seen corresponding path program 1 times [2022-12-13 12:20:08,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:20:08,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589987605] [2022-12-13 12:20:08,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:20:08,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:20:08,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:20:08,106 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 12:20:08,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:20:08,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589987605] [2022-12-13 12:20:08,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589987605] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:20:08,107 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:20:08,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 12:20:08,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809587785] [2022-12-13 12:20:08,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:20:08,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 12:20:08,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:20:08,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 12:20:08,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 12:20:08,142 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 290 [2022-12-13 12:20:08,143 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 30 transitions, 95 flow. Second operand has 4 states, 4 states have (on average 124.75) internal successors, (499), 4 states have internal predecessors, (499), 0 states have call successors, (0), 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 12:20:08,143 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:20:08,143 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 290 [2022-12-13 12:20:08,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:20:08,477 INFO L130 PetriNetUnfolder]: 2184/3291 cut-off events. [2022-12-13 12:20:08,478 INFO L131 PetriNetUnfolder]: For 366/366 co-relation queries the response was YES. [2022-12-13 12:20:08,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7828 conditions, 3291 events. 2184/3291 cut-off events. For 366/366 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 19125 event pairs, 1543 based on Foata normal form. 16/2203 useless extension candidates. Maximal degree in co-relation 7818. Up to 3110 conditions per place. [2022-12-13 12:20:08,491 INFO L137 encePairwiseOnDemand]: 284/290 looper letters, 25 selfloop transitions, 2 changer transitions 13/43 dead transitions. [2022-12-13 12:20:08,491 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 43 transitions, 207 flow [2022-12-13 12:20:08,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 12:20:08,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 12:20:08,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 531 transitions. [2022-12-13 12:20:08,493 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45775862068965517 [2022-12-13 12:20:08,493 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 531 transitions. [2022-12-13 12:20:08,493 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 531 transitions. [2022-12-13 12:20:08,494 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:20:08,494 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 531 transitions. [2022-12-13 12:20:08,495 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 132.75) internal successors, (531), 4 states have internal predecessors, (531), 0 states have call successors, (0), 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 12:20:08,496 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 290.0) internal successors, (1450), 5 states have internal predecessors, (1450), 0 states have call successors, (0), 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 12:20:08,496 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 290.0) internal successors, (1450), 5 states have internal predecessors, (1450), 0 states have call successors, (0), 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 12:20:08,497 INFO L175 Difference]: Start difference. First operand has 38 places, 30 transitions, 95 flow. Second operand 4 states and 531 transitions. [2022-12-13 12:20:08,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 43 transitions, 207 flow [2022-12-13 12:20:08,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 43 transitions, 206 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 12:20:08,498 INFO L231 Difference]: Finished difference. Result has 42 places, 30 transitions, 108 flow [2022-12-13 12:20:08,498 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=108, PETRI_PLACES=42, PETRI_TRANSITIONS=30} [2022-12-13 12:20:08,498 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 5 predicate places. [2022-12-13 12:20:08,499 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 30 transitions, 108 flow [2022-12-13 12:20:08,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 124.75) internal successors, (499), 4 states have internal predecessors, (499), 0 states have call successors, (0), 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 12:20:08,499 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:20:08,499 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:20:08,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 12:20:08,499 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-12-13 12:20:08,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:20:08,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1254270580, now seen corresponding path program 1 times [2022-12-13 12:20:08,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:20:08,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218559221] [2022-12-13 12:20:08,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:20:08,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:20:08,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:20:08,583 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 12:20:08,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:20:08,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218559221] [2022-12-13 12:20:08,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218559221] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:20:08,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659545110] [2022-12-13 12:20:08,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:20:08,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:20:08,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:20:08,585 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:20:08,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 12:20:08,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:20:08,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 12:20:08,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:20:08,663 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 12:20:08,664 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 12:20:08,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659545110] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:20:08,664 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 12:20:08,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2022-12-13 12:20:08,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424028856] [2022-12-13 12:20:08,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:20:08,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 12:20:08,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:20:08,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 12:20:08,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-13 12:20:08,670 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 290 [2022-12-13 12:20:08,671 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 30 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 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 12:20:08,671 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:20:08,671 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 290 [2022-12-13 12:20:08,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:20:08,815 INFO L130 PetriNetUnfolder]: 973/1506 cut-off events. [2022-12-13 12:20:08,815 INFO L131 PetriNetUnfolder]: For 556/556 co-relation queries the response was YES. [2022-12-13 12:20:08,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3691 conditions, 1506 events. 973/1506 cut-off events. For 556/556 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 7620 event pairs, 644 based on Foata normal form. 192/1458 useless extension candidates. Maximal degree in co-relation 3678. Up to 1462 conditions per place. [2022-12-13 12:20:08,818 INFO L137 encePairwiseOnDemand]: 286/290 looper letters, 20 selfloop transitions, 1 changer transitions 3/27 dead transitions. [2022-12-13 12:20:08,818 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 27 transitions, 144 flow [2022-12-13 12:20:08,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 12:20:08,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 12:20:08,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 403 transitions. [2022-12-13 12:20:08,821 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4632183908045977 [2022-12-13 12:20:08,821 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 403 transitions. [2022-12-13 12:20:08,821 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 403 transitions. [2022-12-13 12:20:08,821 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:20:08,821 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 403 transitions. [2022-12-13 12:20:08,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 134.33333333333334) internal successors, (403), 3 states have internal predecessors, (403), 0 states have call successors, (0), 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 12:20:08,824 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 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 12:20:08,824 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 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 12:20:08,824 INFO L175 Difference]: Start difference. First operand has 42 places, 30 transitions, 108 flow. Second operand 3 states and 403 transitions. [2022-12-13 12:20:08,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 27 transitions, 144 flow [2022-12-13 12:20:08,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 27 transitions, 136 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-12-13 12:20:08,826 INFO L231 Difference]: Finished difference. Result has 37 places, 24 transitions, 83 flow [2022-12-13 12:20:08,826 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=83, PETRI_PLACES=37, PETRI_TRANSITIONS=24} [2022-12-13 12:20:08,826 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 0 predicate places. [2022-12-13 12:20:08,826 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 24 transitions, 83 flow [2022-12-13 12:20:08,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 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 12:20:08,827 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:20:08,827 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:20:08,831 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 12:20:09,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:20:09,029 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-12-13 12:20:09,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:20:09,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1531801399, now seen corresponding path program 1 times [2022-12-13 12:20:09,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:20:09,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697513537] [2022-12-13 12:20:09,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:20:09,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:20:09,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:20:09,544 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 12:20:09,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:20:09,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697513537] [2022-12-13 12:20:09,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697513537] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:20:09,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215673770] [2022-12-13 12:20:09,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:20:09,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:20:09,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:20:09,545 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:20:09,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 12:20:09,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:20:09,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 37 conjunts are in the unsatisfiable core [2022-12-13 12:20:09,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:20:09,692 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 12:20:09,737 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 6 treesize of output 5 [2022-12-13 12:20:09,786 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 6 treesize of output 5 [2022-12-13 12:20:09,886 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 12:20:09,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:20:10,243 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:20:10,243 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 62 treesize of output 50 [2022-12-13 12:20:10,256 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:20:10,256 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 316 treesize of output 296 [2022-12-13 12:20:10,269 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:20:10,269 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 284 treesize of output 272 [2022-12-13 12:20:10,283 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:20:10,283 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 260 treesize of output 224 [2022-12-13 12:20:10,595 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 12:20:10,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215673770] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:20:10,595 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:20:10,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 17 [2022-12-13 12:20:10,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37426747] [2022-12-13 12:20:10,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:20:10,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 12:20:10,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:20:10,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 12:20:10,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=252, Unknown=1, NotChecked=0, Total=342 [2022-12-13 12:20:12,668 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 12:20:12,763 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 290 [2022-12-13 12:20:12,764 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 24 transitions, 83 flow. Second operand has 19 states, 19 states have (on average 78.57894736842105) internal successors, (1493), 19 states have internal predecessors, (1493), 0 states have call successors, (0), 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 12:20:12,764 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:20:12,764 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 290 [2022-12-13 12:20:12,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:20:14,601 INFO L130 PetriNetUnfolder]: 1949/3076 cut-off events. [2022-12-13 12:20:14,601 INFO L131 PetriNetUnfolder]: For 265/265 co-relation queries the response was YES. [2022-12-13 12:20:14,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7476 conditions, 3076 events. 1949/3076 cut-off events. For 265/265 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 16626 event pairs, 282 based on Foata normal form. 12/2738 useless extension candidates. Maximal degree in co-relation 7464. Up to 1236 conditions per place. [2022-12-13 12:20:14,611 INFO L137 encePairwiseOnDemand]: 276/290 looper letters, 110 selfloop transitions, 67 changer transitions 3/180 dead transitions. [2022-12-13 12:20:14,611 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 180 transitions, 872 flow [2022-12-13 12:20:14,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-13 12:20:14,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-12-13 12:20:14,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2109 transitions. [2022-12-13 12:20:14,615 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.2908965517241379 [2022-12-13 12:20:14,615 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2109 transitions. [2022-12-13 12:20:14,615 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2109 transitions. [2022-12-13 12:20:14,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:20:14,616 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2109 transitions. [2022-12-13 12:20:14,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 84.36) internal successors, (2109), 25 states have internal predecessors, (2109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:20:14,624 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 290.0) internal successors, (7540), 26 states have internal predecessors, (7540), 0 states have call successors, (0), 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 12:20:14,625 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 290.0) internal successors, (7540), 26 states have internal predecessors, (7540), 0 states have call successors, (0), 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 12:20:14,625 INFO L175 Difference]: Start difference. First operand has 37 places, 24 transitions, 83 flow. Second operand 25 states and 2109 transitions. [2022-12-13 12:20:14,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 180 transitions, 872 flow [2022-12-13 12:20:14,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 180 transitions, 871 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 12:20:14,629 INFO L231 Difference]: Finished difference. Result has 70 places, 94 transitions, 591 flow [2022-12-13 12:20:14,629 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=7, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=591, PETRI_PLACES=70, PETRI_TRANSITIONS=94} [2022-12-13 12:20:14,629 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 33 predicate places. [2022-12-13 12:20:14,629 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 94 transitions, 591 flow [2022-12-13 12:20:14,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 78.57894736842105) internal successors, (1493), 19 states have internal predecessors, (1493), 0 states have call successors, (0), 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 12:20:14,630 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:20:14,630 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:20:14,635 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 12:20:14,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-12-13 12:20:14,831 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-12-13 12:20:14,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:20:14,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1487942671, now seen corresponding path program 1 times [2022-12-13 12:20:14,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:20:14,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245527552] [2022-12-13 12:20:14,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:20:14,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:20:14,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:20:15,359 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 12:20:15,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:20:15,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245527552] [2022-12-13 12:20:15,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245527552] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:20:15,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565603731] [2022-12-13 12:20:15,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:20:15,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:20:15,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:20:15,360 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:20:15,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 12:20:15,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:20:15,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 40 conjunts are in the unsatisfiable core [2022-12-13 12:20:15,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:20:15,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:20:15,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:20:15,452 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 18 treesize of output 16 [2022-12-13 12:20:15,507 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 12:20:15,554 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 6 treesize of output 5 [2022-12-13 12:20:15,643 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 6 treesize of output 5 [2022-12-13 12:20:15,768 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 12:20:15,797 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 12:20:15,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:20:16,273 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:20:16,274 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 65 treesize of output 53 [2022-12-13 12:20:16,286 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:20:16,287 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 1504 treesize of output 1436 [2022-12-13 12:20:16,309 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:20:16,309 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 782 treesize of output 734 [2022-12-13 12:20:16,323 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 1238 treesize of output 1046 [2022-12-13 12:20:16,341 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:20:16,342 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 1172 treesize of output 1064 [2022-12-13 12:20:19,924 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 12:20:19,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565603731] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:20:19,924 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:20:19,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 22 [2022-12-13 12:20:19,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300538741] [2022-12-13 12:20:19,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:20:19,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 12:20:19,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:20:19,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 12:20:19,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=451, Unknown=5, NotChecked=0, Total=552 [2022-12-13 12:20:21,005 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 290 [2022-12-13 12:20:21,006 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 94 transitions, 591 flow. Second operand has 24 states, 24 states have (on average 75.375) internal successors, (1809), 24 states have internal predecessors, (1809), 0 states have call successors, (0), 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 12:20:21,006 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:20:21,006 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 290 [2022-12-13 12:20:21,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:20:25,006 INFO L130 PetriNetUnfolder]: 2499/3944 cut-off events. [2022-12-13 12:20:25,006 INFO L131 PetriNetUnfolder]: For 15641/15641 co-relation queries the response was YES. [2022-12-13 12:20:25,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16747 conditions, 3944 events. 2499/3944 cut-off events. For 15641/15641 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 22137 event pairs, 607 based on Foata normal form. 210/4154 useless extension candidates. Maximal degree in co-relation 16721. Up to 1870 conditions per place. [2022-12-13 12:20:25,020 INFO L137 encePairwiseOnDemand]: 276/290 looper letters, 175 selfloop transitions, 122 changer transitions 1/298 dead transitions. [2022-12-13 12:20:25,020 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 298 transitions, 2460 flow [2022-12-13 12:20:25,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-12-13 12:20:25,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-12-13 12:20:25,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2744 transitions. [2022-12-13 12:20:25,026 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.27829614604462477 [2022-12-13 12:20:25,026 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2744 transitions. [2022-12-13 12:20:25,026 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2744 transitions. [2022-12-13 12:20:25,027 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:20:25,027 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2744 transitions. [2022-12-13 12:20:25,030 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 80.70588235294117) internal successors, (2744), 34 states have internal predecessors, (2744), 0 states have call successors, (0), 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 12:20:25,037 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 290.0) internal successors, (10150), 35 states have internal predecessors, (10150), 0 states have call successors, (0), 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 12:20:25,040 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 290.0) internal successors, (10150), 35 states have internal predecessors, (10150), 0 states have call successors, (0), 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 12:20:25,040 INFO L175 Difference]: Start difference. First operand has 70 places, 94 transitions, 591 flow. Second operand 34 states and 2744 transitions. [2022-12-13 12:20:25,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 298 transitions, 2460 flow [2022-12-13 12:20:25,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 298 transitions, 2364 flow, removed 44 selfloop flow, removed 4 redundant places. [2022-12-13 12:20:25,073 INFO L231 Difference]: Finished difference. Result has 120 places, 175 transitions, 1510 flow [2022-12-13 12:20:25,073 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=536, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=1510, PETRI_PLACES=120, PETRI_TRANSITIONS=175} [2022-12-13 12:20:25,074 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 83 predicate places. [2022-12-13 12:20:25,074 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 175 transitions, 1510 flow [2022-12-13 12:20:25,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 75.375) internal successors, (1809), 24 states have internal predecessors, (1809), 0 states have call successors, (0), 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 12:20:25,075 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:20:25,075 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:20:25,079 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 12:20:25,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:20:25,276 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-12-13 12:20:25,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:20:25,276 INFO L85 PathProgramCache]: Analyzing trace with hash -2141340267, now seen corresponding path program 1 times [2022-12-13 12:20:25,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:20:25,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570245517] [2022-12-13 12:20:25,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:20:25,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:20:25,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:20:26,005 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:20:26,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:20:26,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570245517] [2022-12-13 12:20:26,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570245517] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:20:26,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648759994] [2022-12-13 12:20:26,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:20:26,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:20:26,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:20:26,006 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:20:26,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 12:20:26,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:20:26,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 12:20:26,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:20:26,178 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 12:20:26,178 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 12:20:26,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648759994] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:20:26,178 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 12:20:26,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 11 [2022-12-13 12:20:26,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572038494] [2022-12-13 12:20:26,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:20:26,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 12:20:26,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:20:26,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 12:20:26,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-12-13 12:20:26,271 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 290 [2022-12-13 12:20:26,272 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 175 transitions, 1510 flow. Second operand has 6 states, 6 states have (on average 111.66666666666667) internal successors, (670), 6 states have internal predecessors, (670), 0 states have call successors, (0), 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 12:20:26,272 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:20:26,272 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 290 [2022-12-13 12:20:26,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:20:26,832 INFO L130 PetriNetUnfolder]: 2230/3649 cut-off events. [2022-12-13 12:20:26,832 INFO L131 PetriNetUnfolder]: For 34707/34817 co-relation queries the response was YES. [2022-12-13 12:20:26,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20375 conditions, 3649 events. 2230/3649 cut-off events. For 34707/34817 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 22220 event pairs, 445 based on Foata normal form. 80/3665 useless extension candidates. Maximal degree in co-relation 20327. Up to 2816 conditions per place. [2022-12-13 12:20:26,852 INFO L137 encePairwiseOnDemand]: 282/290 looper letters, 193 selfloop transitions, 57 changer transitions 17/271 dead transitions. [2022-12-13 12:20:26,852 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 271 transitions, 2782 flow [2022-12-13 12:20:26,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 12:20:26,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 12:20:26,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 937 transitions. [2022-12-13 12:20:26,854 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4038793103448276 [2022-12-13 12:20:26,854 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 937 transitions. [2022-12-13 12:20:26,854 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 937 transitions. [2022-12-13 12:20:26,855 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:20:26,855 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 937 transitions. [2022-12-13 12:20:26,856 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 117.125) internal successors, (937), 8 states have internal predecessors, (937), 0 states have call successors, (0), 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 12:20:26,857 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 290.0) internal successors, (2610), 9 states have internal predecessors, (2610), 0 states have call successors, (0), 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 12:20:26,858 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 290.0) internal successors, (2610), 9 states have internal predecessors, (2610), 0 states have call successors, (0), 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 12:20:26,858 INFO L175 Difference]: Start difference. First operand has 120 places, 175 transitions, 1510 flow. Second operand 8 states and 937 transitions. [2022-12-13 12:20:26,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 271 transitions, 2782 flow [2022-12-13 12:20:26,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 271 transitions, 2705 flow, removed 32 selfloop flow, removed 5 redundant places. [2022-12-13 12:20:26,958 INFO L231 Difference]: Finished difference. Result has 127 places, 218 transitions, 2080 flow [2022-12-13 12:20:26,958 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=1429, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2080, PETRI_PLACES=127, PETRI_TRANSITIONS=218} [2022-12-13 12:20:26,958 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 90 predicate places. [2022-12-13 12:20:26,958 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 218 transitions, 2080 flow [2022-12-13 12:20:26,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 111.66666666666667) internal successors, (670), 6 states have internal predecessors, (670), 0 states have call successors, (0), 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 12:20:26,959 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:20:26,959 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:20:26,964 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 12:20:27,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:20:27,160 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-12-13 12:20:27,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:20:27,160 INFO L85 PathProgramCache]: Analyzing trace with hash -2138226627, now seen corresponding path program 2 times [2022-12-13 12:20:27,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:20:27,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289727092] [2022-12-13 12:20:27,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:20:27,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:20:27,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:20:27,965 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:20:27,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:20:27,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289727092] [2022-12-13 12:20:27,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289727092] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:20:27,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094849257] [2022-12-13 12:20:27,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 12:20:27,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:20:27,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:20:27,966 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:20:27,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 12:20:28,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 12:20:28,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:20:28,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 12:20:28,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:20:28,094 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 12:20:28,094 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 12:20:28,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094849257] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:20:28,095 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 12:20:28,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 9 [2022-12-13 12:20:28,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598166871] [2022-12-13 12:20:28,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:20:28,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 12:20:28,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:20:28,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 12:20:28,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-12-13 12:20:28,149 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 290 [2022-12-13 12:20:28,150 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 218 transitions, 2080 flow. Second operand has 5 states, 5 states have (on average 113.8) internal successors, (569), 5 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:20:28,150 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:20:28,150 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 290 [2022-12-13 12:20:28,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:20:28,652 INFO L130 PetriNetUnfolder]: 2065/3324 cut-off events. [2022-12-13 12:20:28,652 INFO L131 PetriNetUnfolder]: For 38707/38806 co-relation queries the response was YES. [2022-12-13 12:20:28,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20095 conditions, 3324 events. 2065/3324 cut-off events. For 38707/38806 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 18946 event pairs, 341 based on Foata normal form. 90/3384 useless extension candidates. Maximal degree in co-relation 20041. Up to 2344 conditions per place. [2022-12-13 12:20:28,670 INFO L137 encePairwiseOnDemand]: 282/290 looper letters, 173 selfloop transitions, 76 changer transitions 0/264 dead transitions. [2022-12-13 12:20:28,670 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 264 transitions, 3041 flow [2022-12-13 12:20:28,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 12:20:28,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 12:20:28,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 713 transitions. [2022-12-13 12:20:28,672 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40977011494252874 [2022-12-13 12:20:28,672 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 713 transitions. [2022-12-13 12:20:28,672 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 713 transitions. [2022-12-13 12:20:28,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:20:28,672 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 713 transitions. [2022-12-13 12:20:28,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 118.83333333333333) internal successors, (713), 6 states have internal predecessors, (713), 0 states have call successors, (0), 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 12:20:28,674 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 290.0) internal successors, (2030), 7 states have internal predecessors, (2030), 0 states have call successors, (0), 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 12:20:28,675 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 290.0) internal successors, (2030), 7 states have internal predecessors, (2030), 0 states have call successors, (0), 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 12:20:28,675 INFO L175 Difference]: Start difference. First operand has 127 places, 218 transitions, 2080 flow. Second operand 6 states and 713 transitions. [2022-12-13 12:20:28,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 264 transitions, 3041 flow [2022-12-13 12:20:28,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 264 transitions, 2951 flow, removed 37 selfloop flow, removed 1 redundant places. [2022-12-13 12:20:28,795 INFO L231 Difference]: Finished difference. Result has 135 places, 243 transitions, 2605 flow [2022-12-13 12:20:28,796 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=2012, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2605, PETRI_PLACES=135, PETRI_TRANSITIONS=243} [2022-12-13 12:20:28,796 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 98 predicate places. [2022-12-13 12:20:28,796 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 243 transitions, 2605 flow [2022-12-13 12:20:28,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 113.8) internal successors, (569), 5 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:20:28,797 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:20:28,797 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:20:28,802 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 12:20:28,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-13 12:20:28,999 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-12-13 12:20:28,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:20:29,000 INFO L85 PathProgramCache]: Analyzing trace with hash -608731159, now seen corresponding path program 1 times [2022-12-13 12:20:29,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:20:29,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253271042] [2022-12-13 12:20:29,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:20:29,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:20:29,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:20:30,146 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:20:30,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:20:30,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253271042] [2022-12-13 12:20:30,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253271042] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:20:30,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172734144] [2022-12-13 12:20:30,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:20:30,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:20:30,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:20:30,148 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:20:30,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 12:20:30,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:20:30,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-13 12:20:30,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:20:30,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:20:30,393 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 12:20:30,417 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 12:20:30,418 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 12:20:30,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172734144] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:20:30,418 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 12:20:30,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 14 [2022-12-13 12:20:30,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401990213] [2022-12-13 12:20:30,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:20:30,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 12:20:30,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:20:30,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 12:20:30,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2022-12-13 12:20:30,583 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 290 [2022-12-13 12:20:30,584 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 243 transitions, 2605 flow. Second operand has 8 states, 8 states have (on average 106.375) internal successors, (851), 8 states have internal predecessors, (851), 0 states have call successors, (0), 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 12:20:30,584 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:20:30,584 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 290 [2022-12-13 12:20:30,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:20:31,250 INFO L130 PetriNetUnfolder]: 2229/3619 cut-off events. [2022-12-13 12:20:31,250 INFO L131 PetriNetUnfolder]: For 42937/43063 co-relation queries the response was YES. [2022-12-13 12:20:31,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22639 conditions, 3619 events. 2229/3619 cut-off events. For 42937/43063 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 21736 event pairs, 601 based on Foata normal form. 81/3615 useless extension candidates. Maximal degree in co-relation 22580. Up to 2675 conditions per place. [2022-12-13 12:20:31,270 INFO L137 encePairwiseOnDemand]: 283/290 looper letters, 212 selfloop transitions, 69 changer transitions 1/286 dead transitions. [2022-12-13 12:20:31,270 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 286 transitions, 3497 flow [2022-12-13 12:20:31,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 12:20:31,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 12:20:31,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 893 transitions. [2022-12-13 12:20:31,272 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38491379310344825 [2022-12-13 12:20:31,272 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 893 transitions. [2022-12-13 12:20:31,272 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 893 transitions. [2022-12-13 12:20:31,273 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:20:31,273 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 893 transitions. [2022-12-13 12:20:31,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 111.625) internal successors, (893), 8 states have internal predecessors, (893), 0 states have call successors, (0), 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 12:20:31,275 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 290.0) internal successors, (2610), 9 states have internal predecessors, (2610), 0 states have call successors, (0), 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 12:20:31,276 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 290.0) internal successors, (2610), 9 states have internal predecessors, (2610), 0 states have call successors, (0), 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 12:20:31,276 INFO L175 Difference]: Start difference. First operand has 135 places, 243 transitions, 2605 flow. Second operand 8 states and 893 transitions. [2022-12-13 12:20:31,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 286 transitions, 3497 flow [2022-12-13 12:20:31,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 286 transitions, 3455 flow, removed 4 selfloop flow, removed 1 redundant places. [2022-12-13 12:20:31,406 INFO L231 Difference]: Finished difference. Result has 142 places, 248 transitions, 2803 flow [2022-12-13 12:20:31,407 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=2543, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2803, PETRI_PLACES=142, PETRI_TRANSITIONS=248} [2022-12-13 12:20:31,407 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 105 predicate places. [2022-12-13 12:20:31,407 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 248 transitions, 2803 flow [2022-12-13 12:20:31,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 106.375) internal successors, (851), 8 states have internal predecessors, (851), 0 states have call successors, (0), 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 12:20:31,407 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:20:31,408 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:20:31,411 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 12:20:31,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:20:31,609 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-12-13 12:20:31,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:20:31,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1045851063, now seen corresponding path program 1 times [2022-12-13 12:20:31,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:20:31,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285550555] [2022-12-13 12:20:31,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:20:31,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:20:31,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:20:31,689 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 12:20:31,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:20:31,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285550555] [2022-12-13 12:20:31,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285550555] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:20:31,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:20:31,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 12:20:31,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723999519] [2022-12-13 12:20:31,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:20:31,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 12:20:31,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:20:31,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 12:20:31,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 12:20:31,700 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 290 [2022-12-13 12:20:31,701 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 248 transitions, 2803 flow. Second operand has 4 states, 4 states have (on average 127.5) internal successors, (510), 4 states have internal predecessors, (510), 0 states have call successors, (0), 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 12:20:31,701 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:20:31,701 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 290 [2022-12-13 12:20:31,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:20:32,473 INFO L130 PetriNetUnfolder]: 2451/4214 cut-off events. [2022-12-13 12:20:32,473 INFO L131 PetriNetUnfolder]: For 75300/75578 co-relation queries the response was YES. [2022-12-13 12:20:32,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29033 conditions, 4214 events. 2451/4214 cut-off events. For 75300/75578 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 28256 event pairs, 487 based on Foata normal form. 246/4356 useless extension candidates. Maximal degree in co-relation 28972. Up to 1846 conditions per place. [2022-12-13 12:20:32,499 INFO L137 encePairwiseOnDemand]: 285/290 looper letters, 159 selfloop transitions, 81 changer transitions 9/268 dead transitions. [2022-12-13 12:20:32,499 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 268 transitions, 3671 flow [2022-12-13 12:20:32,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 12:20:32,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 12:20:32,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 534 transitions. [2022-12-13 12:20:32,514 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4603448275862069 [2022-12-13 12:20:32,514 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 534 transitions. [2022-12-13 12:20:32,514 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 534 transitions. [2022-12-13 12:20:32,515 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:20:32,515 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 534 transitions. [2022-12-13 12:20:32,516 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 133.5) internal successors, (534), 4 states have internal predecessors, (534), 0 states have call successors, (0), 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 12:20:32,517 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 290.0) internal successors, (1450), 5 states have internal predecessors, (1450), 0 states have call successors, (0), 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 12:20:32,517 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 290.0) internal successors, (1450), 5 states have internal predecessors, (1450), 0 states have call successors, (0), 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 12:20:32,517 INFO L175 Difference]: Start difference. First operand has 142 places, 248 transitions, 2803 flow. Second operand 4 states and 534 transitions. [2022-12-13 12:20:32,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 268 transitions, 3671 flow [2022-12-13 12:20:32,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 268 transitions, 3516 flow, removed 13 selfloop flow, removed 13 redundant places. [2022-12-13 12:20:32,677 INFO L231 Difference]: Finished difference. Result has 128 places, 230 transitions, 2924 flow [2022-12-13 12:20:32,677 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=2411, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2924, PETRI_PLACES=128, PETRI_TRANSITIONS=230} [2022-12-13 12:20:32,678 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 91 predicate places. [2022-12-13 12:20:32,678 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 230 transitions, 2924 flow [2022-12-13 12:20:32,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 127.5) internal successors, (510), 4 states have internal predecessors, (510), 0 states have call successors, (0), 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 12:20:32,678 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:20:32,678 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:20:32,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-13 12:20:32,679 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-12-13 12:20:32,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:20:32,679 INFO L85 PathProgramCache]: Analyzing trace with hash -608742318, now seen corresponding path program 2 times [2022-12-13 12:20:32,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:20:32,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15186368] [2022-12-13 12:20:32,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:20:32,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:20:32,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:20:33,121 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:20:33,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:20:33,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15186368] [2022-12-13 12:20:33,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15186368] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:20:33,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808135556] [2022-12-13 12:20:33,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 12:20:33,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:20:33,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:20:33,123 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:20:33,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 12:20:33,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 12:20:33,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:20:33,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 12:20:33,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:20:33,310 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 12:20:33,310 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 12:20:33,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808135556] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:20:33,311 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 12:20:33,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2022-12-13 12:20:33,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853634610] [2022-12-13 12:20:33,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:20:33,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 12:20:33,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:20:33,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 12:20:33,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-12-13 12:20:33,409 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 290 [2022-12-13 12:20:33,409 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 230 transitions, 2924 flow. Second operand has 6 states, 6 states have (on average 111.83333333333333) internal successors, (671), 6 states have internal predecessors, (671), 0 states have call successors, (0), 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 12:20:33,409 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:20:33,409 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 290 [2022-12-13 12:20:33,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:20:34,178 INFO L130 PetriNetUnfolder]: 2679/4475 cut-off events. [2022-12-13 12:20:34,179 INFO L131 PetriNetUnfolder]: For 62217/62380 co-relation queries the response was YES. [2022-12-13 12:20:34,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28885 conditions, 4475 events. 2679/4475 cut-off events. For 62217/62380 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 28819 event pairs, 852 based on Foata normal form. 66/4426 useless extension candidates. Maximal degree in co-relation 28828. Up to 3715 conditions per place. [2022-12-13 12:20:34,207 INFO L137 encePairwiseOnDemand]: 282/290 looper letters, 188 selfloop transitions, 71 changer transitions 3/266 dead transitions. [2022-12-13 12:20:34,207 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 266 transitions, 3684 flow [2022-12-13 12:20:34,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 12:20:34,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 12:20:34,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 932 transitions. [2022-12-13 12:20:34,209 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4017241379310345 [2022-12-13 12:20:34,209 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 932 transitions. [2022-12-13 12:20:34,209 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 932 transitions. [2022-12-13 12:20:34,209 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:20:34,211 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 932 transitions. [2022-12-13 12:20:34,212 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 116.5) internal successors, (932), 8 states have internal predecessors, (932), 0 states have call successors, (0), 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 12:20:34,214 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 290.0) internal successors, (2610), 9 states have internal predecessors, (2610), 0 states have call successors, (0), 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 12:20:34,214 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 290.0) internal successors, (2610), 9 states have internal predecessors, (2610), 0 states have call successors, (0), 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 12:20:34,214 INFO L175 Difference]: Start difference. First operand has 128 places, 230 transitions, 2924 flow. Second operand 8 states and 932 transitions. [2022-12-13 12:20:34,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 266 transitions, 3684 flow [2022-12-13 12:20:34,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 266 transitions, 3674 flow, removed 5 selfloop flow, removed 0 redundant places. [2022-12-13 12:20:34,357 INFO L231 Difference]: Finished difference. Result has 136 places, 228 transitions, 3080 flow [2022-12-13 12:20:34,357 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=2918, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3080, PETRI_PLACES=136, PETRI_TRANSITIONS=228} [2022-12-13 12:20:34,357 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 99 predicate places. [2022-12-13 12:20:34,357 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 228 transitions, 3080 flow [2022-12-13 12:20:34,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 111.83333333333333) internal successors, (671), 6 states have internal predecessors, (671), 0 states have call successors, (0), 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 12:20:34,358 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:20:34,358 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:20:34,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-13 12:20:34,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-13 12:20:34,559 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-12-13 12:20:34,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:20:34,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1855824454, now seen corresponding path program 3 times [2022-12-13 12:20:34,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:20:34,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969248834] [2022-12-13 12:20:34,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:20:34,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:20:34,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:20:35,033 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:20:35,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:20:35,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969248834] [2022-12-13 12:20:35,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969248834] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:20:35,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354112594] [2022-12-13 12:20:35,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 12:20:35,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:20:35,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:20:35,035 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:20:35,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 12:20:35,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-12-13 12:20:35,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:20:35,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 12:20:35,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:20:35,194 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 12:20:35,194 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 12:20:35,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354112594] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:20:35,194 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 12:20:35,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 9 [2022-12-13 12:20:35,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048018629] [2022-12-13 12:20:35,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:20:35,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 12:20:35,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:20:35,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 12:20:35,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-12-13 12:20:35,249 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 290 [2022-12-13 12:20:35,249 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 228 transitions, 3080 flow. Second operand has 5 states, 5 states have (on average 114.0) internal successors, (570), 5 states have internal predecessors, (570), 0 states have call successors, (0), 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 12:20:35,249 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:20:35,249 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 290 [2022-12-13 12:20:35,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:20:35,943 INFO L130 PetriNetUnfolder]: 2673/4426 cut-off events. [2022-12-13 12:20:35,943 INFO L131 PetriNetUnfolder]: For 74257/74352 co-relation queries the response was YES. [2022-12-13 12:20:35,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30448 conditions, 4426 events. 2673/4426 cut-off events. For 74257/74352 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 26980 event pairs, 614 based on Foata normal form. 84/4499 useless extension candidates. Maximal degree in co-relation 30388. Up to 3425 conditions per place. [2022-12-13 12:20:35,969 INFO L137 encePairwiseOnDemand]: 283/290 looper letters, 154 selfloop transitions, 81 changer transitions 0/250 dead transitions. [2022-12-13 12:20:35,969 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 250 transitions, 3724 flow [2022-12-13 12:20:35,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 12:20:35,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 12:20:35,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 710 transitions. [2022-12-13 12:20:35,970 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40804597701149425 [2022-12-13 12:20:35,971 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 710 transitions. [2022-12-13 12:20:35,971 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 710 transitions. [2022-12-13 12:20:35,971 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:20:35,971 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 710 transitions. [2022-12-13 12:20:35,971 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 118.33333333333333) internal successors, (710), 6 states have internal predecessors, (710), 0 states have call successors, (0), 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 12:20:35,972 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 290.0) internal successors, (2030), 7 states have internal predecessors, (2030), 0 states have call successors, (0), 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 12:20:35,973 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 290.0) internal successors, (2030), 7 states have internal predecessors, (2030), 0 states have call successors, (0), 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 12:20:35,973 INFO L175 Difference]: Start difference. First operand has 136 places, 228 transitions, 3080 flow. Second operand 6 states and 710 transitions. [2022-12-13 12:20:35,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 250 transitions, 3724 flow [2022-12-13 12:20:36,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 250 transitions, 3578 flow, removed 2 selfloop flow, removed 8 redundant places. [2022-12-13 12:20:36,095 INFO L231 Difference]: Finished difference. Result has 133 places, 228 transitions, 3158 flow [2022-12-13 12:20:36,095 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=2936, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3158, PETRI_PLACES=133, PETRI_TRANSITIONS=228} [2022-12-13 12:20:36,096 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 96 predicate places. [2022-12-13 12:20:36,096 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 228 transitions, 3158 flow [2022-12-13 12:20:36,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 114.0) internal successors, (570), 5 states have internal predecessors, (570), 0 states have call successors, (0), 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 12:20:36,096 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:20:36,096 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:20:36,100 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-13 12:20:36,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-13 12:20:36,297 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-12-13 12:20:36,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:20:36,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1860512584, now seen corresponding path program 4 times [2022-12-13 12:20:36,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:20:36,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351893774] [2022-12-13 12:20:36,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:20:36,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:20:36,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:20:37,170 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:20:37,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:20:37,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351893774] [2022-12-13 12:20:37,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351893774] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:20:37,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600085616] [2022-12-13 12:20:37,171 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 12:20:37,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:20:37,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:20:37,172 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:20:37,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 12:20:37,236 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 12:20:37,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:20:37,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-13 12:20:37,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:20:37,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:20:37,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-13 12:20:37,390 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 12:20:37,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:20:37,472 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:20:37,472 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 82 treesize of output 70 [2022-12-13 12:20:37,519 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 11 treesize of output 5 [2022-12-13 12:20:37,806 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 12:20:37,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600085616] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 12:20:37,806 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-13 12:20:37,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 6] total 18 [2022-12-13 12:20:37,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024212435] [2022-12-13 12:20:37,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:20:37,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 12:20:37,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:20:37,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 12:20:37,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=320, Unknown=3, NotChecked=0, Total=380 [2022-12-13 12:20:38,036 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 290 [2022-12-13 12:20:38,037 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 228 transitions, 3158 flow. Second operand has 7 states, 7 states have (on average 93.57142857142857) internal successors, (655), 7 states have internal predecessors, (655), 0 states have call successors, (0), 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 12:20:38,037 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:20:38,037 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 290 [2022-12-13 12:20:38,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:20:43,330 INFO L130 PetriNetUnfolder]: 3310/5292 cut-off events. [2022-12-13 12:20:43,330 INFO L131 PetriNetUnfolder]: For 70998/70998 co-relation queries the response was YES. [2022-12-13 12:20:43,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33727 conditions, 5292 events. 3310/5292 cut-off events. For 70998/70998 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 31123 event pairs, 387 based on Foata normal form. 80/5372 useless extension candidates. Maximal degree in co-relation 33667. Up to 2508 conditions per place. [2022-12-13 12:20:43,357 INFO L137 encePairwiseOnDemand]: 280/290 looper letters, 214 selfloop transitions, 106 changer transitions 48/368 dead transitions. [2022-12-13 12:20:43,358 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 368 transitions, 5635 flow [2022-12-13 12:20:43,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 12:20:43,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 12:20:43,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 905 transitions. [2022-12-13 12:20:43,359 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.34674329501915707 [2022-12-13 12:20:43,359 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 905 transitions. [2022-12-13 12:20:43,359 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 905 transitions. [2022-12-13 12:20:43,360 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:20:43,360 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 905 transitions. [2022-12-13 12:20:43,361 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 100.55555555555556) internal successors, (905), 9 states have internal predecessors, (905), 0 states have call successors, (0), 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 12:20:43,362 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 290.0) internal successors, (2900), 10 states have internal predecessors, (2900), 0 states have call successors, (0), 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 12:20:43,362 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 290.0) internal successors, (2900), 10 states have internal predecessors, (2900), 0 states have call successors, (0), 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 12:20:43,362 INFO L175 Difference]: Start difference. First operand has 133 places, 228 transitions, 3158 flow. Second operand 9 states and 905 transitions. [2022-12-13 12:20:43,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 368 transitions, 5635 flow [2022-12-13 12:20:43,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 368 transitions, 5422 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-13 12:20:43,467 INFO L231 Difference]: Finished difference. Result has 143 places, 251 transitions, 3698 flow [2022-12-13 12:20:43,467 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=3009, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3698, PETRI_PLACES=143, PETRI_TRANSITIONS=251} [2022-12-13 12:20:43,467 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 106 predicate places. [2022-12-13 12:20:43,467 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 251 transitions, 3698 flow [2022-12-13 12:20:43,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 93.57142857142857) internal successors, (655), 7 states have internal predecessors, (655), 0 states have call successors, (0), 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 12:20:43,468 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:20:43,468 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:20:43,472 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-13 12:20:43,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-13 12:20:43,669 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-12-13 12:20:43,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:20:43,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1855467335, now seen corresponding path program 2 times [2022-12-13 12:20:43,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:20:43,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186026689] [2022-12-13 12:20:43,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:20:43,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:20:43,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:20:44,349 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:20:44,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:20:44,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186026689] [2022-12-13 12:20:44,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186026689] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:20:44,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375739083] [2022-12-13 12:20:44,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 12:20:44,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:20:44,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:20:44,351 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:20:44,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 12:20:44,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 12:20:44,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:20:44,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 12:20:44,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:20:44,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:20:44,543 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 12:20:44,562 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 12:20:44,563 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 12:20:44,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375739083] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:20:44,563 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 12:20:44,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 12 [2022-12-13 12:20:44,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390906003] [2022-12-13 12:20:44,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:20:44,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 12:20:44,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:20:44,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 12:20:44,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-12-13 12:20:44,688 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 290 [2022-12-13 12:20:44,689 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 251 transitions, 3698 flow. Second operand has 7 states, 7 states have (on average 108.42857142857143) internal successors, (759), 7 states have internal predecessors, (759), 0 states have call successors, (0), 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 12:20:44,689 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:20:44,689 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 290 [2022-12-13 12:20:44,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:20:45,556 INFO L130 PetriNetUnfolder]: 2653/4503 cut-off events. [2022-12-13 12:20:45,557 INFO L131 PetriNetUnfolder]: For 91112/91229 co-relation queries the response was YES. [2022-12-13 12:20:45,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33274 conditions, 4503 events. 2653/4503 cut-off events. For 91112/91229 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 28619 event pairs, 684 based on Foata normal form. 83/4575 useless extension candidates. Maximal degree in co-relation 33208. Up to 2456 conditions per place. [2022-12-13 12:20:45,585 INFO L137 encePairwiseOnDemand]: 284/290 looper letters, 160 selfloop transitions, 93 changer transitions 1/269 dead transitions. [2022-12-13 12:20:45,585 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 269 transitions, 4368 flow [2022-12-13 12:20:45,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 12:20:45,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 12:20:45,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 681 transitions. [2022-12-13 12:20:45,586 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3913793103448276 [2022-12-13 12:20:45,586 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 681 transitions. [2022-12-13 12:20:45,586 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 681 transitions. [2022-12-13 12:20:45,587 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:20:45,587 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 681 transitions. [2022-12-13 12:20:45,587 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 113.5) internal successors, (681), 6 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 12:20:45,588 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 290.0) internal successors, (2030), 7 states have internal predecessors, (2030), 0 states have call successors, (0), 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 12:20:45,588 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 290.0) internal successors, (2030), 7 states have internal predecessors, (2030), 0 states have call successors, (0), 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 12:20:45,588 INFO L175 Difference]: Start difference. First operand has 143 places, 251 transitions, 3698 flow. Second operand 6 states and 681 transitions. [2022-12-13 12:20:45,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 269 transitions, 4368 flow [2022-12-13 12:20:45,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 269 transitions, 4153 flow, removed 28 selfloop flow, removed 5 redundant places. [2022-12-13 12:20:45,777 INFO L231 Difference]: Finished difference. Result has 144 places, 251 transitions, 3755 flow [2022-12-13 12:20:45,777 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=3451, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3755, PETRI_PLACES=144, PETRI_TRANSITIONS=251} [2022-12-13 12:20:45,777 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 107 predicate places. [2022-12-13 12:20:45,777 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 251 transitions, 3755 flow [2022-12-13 12:20:45,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 108.42857142857143) internal successors, (759), 7 states have internal predecessors, (759), 0 states have call successors, (0), 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 12:20:45,778 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:20:45,778 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:20:45,783 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-13 12:20:45,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-13 12:20:45,979 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-12-13 12:20:45,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:20:45,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1474731168, now seen corresponding path program 2 times [2022-12-13 12:20:45,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:20:45,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404749031] [2022-12-13 12:20:45,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:20:45,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:20:46,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:20:46,608 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:20:46,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:20:46,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404749031] [2022-12-13 12:20:46,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404749031] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:20:46,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570682758] [2022-12-13 12:20:46,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 12:20:46,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:20:46,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:20:46,610 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:20:46,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-13 12:20:46,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 12:20:46,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:20:46,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 44 conjunts are in the unsatisfiable core [2022-12-13 12:20:46,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:20:46,760 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 12:20:46,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:20:46,829 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 20 treesize of output 22 [2022-12-13 12:20:46,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:20:46,918 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 20 treesize of output 22 [2022-12-13 12:20:47,287 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:20:47,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:20:47,964 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:20:47,964 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 90 treesize of output 66 [2022-12-13 12:20:48,009 INFO L321 Elim1Store]: treesize reduction 12, result has 83.6 percent of original size [2022-12-13 12:20:48,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 397 treesize of output 401 [2022-12-13 12:20:48,021 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 12:20:48,031 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:20:48,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 238 treesize of output 226 [2022-12-13 12:20:48,058 INFO L321 Elim1Store]: treesize reduction 12, result has 67.6 percent of original size [2022-12-13 12:20:48,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 300 treesize of output 252 [2022-12-13 12:20:50,944 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:20:50,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570682758] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:20:50,944 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:20:50,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 28 [2022-12-13 12:20:50,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639072796] [2022-12-13 12:20:50,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:20:50,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-13 12:20:50,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:20:50,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-13 12:20:50,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=749, Unknown=1, NotChecked=0, Total=870 [2022-12-13 12:20:53,745 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 290 [2022-12-13 12:20:53,747 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 251 transitions, 3755 flow. Second operand has 30 states, 30 states have (on average 78.5) internal successors, (2355), 30 states have internal predecessors, (2355), 0 states have call successors, (0), 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 12:20:53,747 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:20:53,747 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 290 [2022-12-13 12:20:53,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:20:56,571 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:20:58,865 WARN L539 Checker$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 12:21:07,615 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 12:21:21,735 INFO L130 PetriNetUnfolder]: 7389/11958 cut-off events. [2022-12-13 12:21:21,735 INFO L131 PetriNetUnfolder]: For 227128/227128 co-relation queries the response was YES. [2022-12-13 12:21:21,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81075 conditions, 11958 events. 7389/11958 cut-off events. For 227128/227128 co-relation queries the response was YES. Maximal size of possible extension queue 588. Compared 80600 event pairs, 777 based on Foata normal form. 506/12464 useless extension candidates. Maximal degree in co-relation 81011. Up to 3047 conditions per place. [2022-12-13 12:21:21,850 INFO L137 encePairwiseOnDemand]: 276/290 looper letters, 492 selfloop transitions, 593 changer transitions 104/1189 dead transitions. [2022-12-13 12:21:21,850 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 1189 transitions, 17898 flow [2022-12-13 12:21:21,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-12-13 12:21:21,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2022-12-13 12:21:21,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 10005 transitions. [2022-12-13 12:21:21,860 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.2875 [2022-12-13 12:21:21,860 INFO L72 ComplementDD]: Start complementDD. Operand 120 states and 10005 transitions. [2022-12-13 12:21:21,860 INFO L73 IsDeterministic]: Start isDeterministic. Operand 120 states and 10005 transitions. [2022-12-13 12:21:21,862 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:21:21,862 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 120 states and 10005 transitions. [2022-12-13 12:21:21,870 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 121 states, 120 states have (on average 83.375) internal successors, (10005), 120 states have internal predecessors, (10005), 0 states have call successors, (0), 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 12:21:21,888 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 121 states, 121 states have (on average 290.0) internal successors, (35090), 121 states have internal predecessors, (35090), 0 states have call successors, (0), 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 12:21:21,891 INFO L81 ComplementDD]: Finished complementDD. Result has 121 states, 121 states have (on average 290.0) internal successors, (35090), 121 states have internal predecessors, (35090), 0 states have call successors, (0), 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 12:21:21,891 INFO L175 Difference]: Start difference. First operand has 144 places, 251 transitions, 3755 flow. Second operand 120 states and 10005 transitions. [2022-12-13 12:21:21,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 1189 transitions, 17898 flow [2022-12-13 12:21:22,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 1189 transitions, 17686 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-12-13 12:21:22,357 INFO L231 Difference]: Finished difference. Result has 327 places, 758 transitions, 14831 flow [2022-12-13 12:21:22,358 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=3626, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=120, PETRI_FLOW=14831, PETRI_PLACES=327, PETRI_TRANSITIONS=758} [2022-12-13 12:21:22,358 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 290 predicate places. [2022-12-13 12:21:22,358 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 758 transitions, 14831 flow [2022-12-13 12:21:22,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 78.5) internal successors, (2355), 30 states have internal predecessors, (2355), 0 states have call successors, (0), 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 12:21:22,358 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:21:22,358 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:21:22,362 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-13 12:21:22,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-13 12:21:22,560 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-12-13 12:21:22,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:21:22,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1941606163, now seen corresponding path program 1 times [2022-12-13 12:21:22,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:21:22,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338425145] [2022-12-13 12:21:22,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:21:22,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:21:22,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:21:22,646 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 12:21:22,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:21:22,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338425145] [2022-12-13 12:21:22,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338425145] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:21:22,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001916034] [2022-12-13 12:21:22,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:21:22,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:21:22,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:21:22,648 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:21:22,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-13 12:21:22,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:21:22,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 12:21:22,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:21:22,775 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 130 treesize of output 98 [2022-12-13 12:21:22,800 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 12:21:22,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:21:22,857 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 144 treesize of output 112 [2022-12-13 12:21:22,902 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 12:21:22,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001916034] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:21:22,902 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:21:22,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-12-13 12:21:22,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139213217] [2022-12-13 12:21:22,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:21:22,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 12:21:22,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:21:22,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 12:21:22,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-12-13 12:21:22,985 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 290 [2022-12-13 12:21:22,986 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 758 transitions, 14831 flow. Second operand has 12 states, 12 states have (on average 120.75) internal successors, (1449), 12 states have internal predecessors, (1449), 0 states have call successors, (0), 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 12:21:22,986 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:21:22,986 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 290 [2022-12-13 12:21:22,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:21:24,359 INFO L130 PetriNetUnfolder]: 2344/4340 cut-off events. [2022-12-13 12:21:24,360 INFO L131 PetriNetUnfolder]: For 390622/391246 co-relation queries the response was YES. [2022-12-13 12:21:24,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50158 conditions, 4340 events. 2344/4340 cut-off events. For 390622/391246 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 31024 event pairs, 802 based on Foata normal form. 141/4391 useless extension candidates. Maximal degree in co-relation 50036. Up to 3386 conditions per place. [2022-12-13 12:21:24,411 INFO L137 encePairwiseOnDemand]: 286/290 looper letters, 317 selfloop transitions, 3 changer transitions 99/440 dead transitions. [2022-12-13 12:21:24,412 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 440 transitions, 9249 flow [2022-12-13 12:21:24,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 12:21:24,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 12:21:24,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 749 transitions. [2022-12-13 12:21:24,413 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4304597701149425 [2022-12-13 12:21:24,413 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 749 transitions. [2022-12-13 12:21:24,413 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 749 transitions. [2022-12-13 12:21:24,414 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:21:24,414 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 749 transitions. [2022-12-13 12:21:24,415 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 124.83333333333333) internal successors, (749), 6 states have internal predecessors, (749), 0 states have call successors, (0), 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 12:21:24,416 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 290.0) internal successors, (2030), 7 states have internal predecessors, (2030), 0 states have call successors, (0), 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 12:21:24,416 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 290.0) internal successors, (2030), 7 states have internal predecessors, (2030), 0 states have call successors, (0), 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 12:21:24,417 INFO L175 Difference]: Start difference. First operand has 327 places, 758 transitions, 14831 flow. Second operand 6 states and 749 transitions. [2022-12-13 12:21:24,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 440 transitions, 9249 flow [2022-12-13 12:21:25,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 440 transitions, 7329 flow, removed 854 selfloop flow, removed 50 redundant places. [2022-12-13 12:21:25,481 INFO L231 Difference]: Finished difference. Result has 233 places, 341 transitions, 5061 flow [2022-12-13 12:21:25,481 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=6500, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5061, PETRI_PLACES=233, PETRI_TRANSITIONS=341} [2022-12-13 12:21:25,482 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 196 predicate places. [2022-12-13 12:21:25,482 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 341 transitions, 5061 flow [2022-12-13 12:21:25,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 120.75) internal successors, (1449), 12 states have internal predecessors, (1449), 0 states have call successors, (0), 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 12:21:25,482 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:21:25,482 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:21:25,486 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-13 12:21:25,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:21:25,683 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-12-13 12:21:25,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:21:25,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1249861789, now seen corresponding path program 1 times [2022-12-13 12:21:25,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:21:25,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684578940] [2022-12-13 12:21:25,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:21:25,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:21:25,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:21:26,292 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:21:26,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:21:26,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684578940] [2022-12-13 12:21:26,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684578940] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:21:26,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807163953] [2022-12-13 12:21:26,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:21:26,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:21:26,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:21:26,293 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:21:26,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-13 12:21:26,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:21:26,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 35 conjunts are in the unsatisfiable core [2022-12-13 12:21:26,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:21:26,418 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 12:21:26,489 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-12-13 12:21:26,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 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 27 treesize of output 34 [2022-12-13 12:21:26,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:21:26,580 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 31 treesize of output 33 [2022-12-13 12:21:26,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:21:26,659 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 31 treesize of output 33 [2022-12-13 12:21:27,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:21:27,026 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 40 treesize of output 40 [2022-12-13 12:21:27,072 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:21:27,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:21:27,107 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_800 (Array Int Int))) (< (+ c_~sum~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_800) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4)))) 2147483648)) is different from false [2022-12-13 12:21:27,765 INFO L321 Elim1Store]: treesize reduction 40, result has 62.6 percent of original size [2022-12-13 12:21:27,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 179 treesize of output 179 [2022-12-13 12:21:27,799 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:21:27,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 2037 treesize of output 1985 [2022-12-13 12:21:27,829 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:21:27,829 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 1935 treesize of output 1828 [2022-12-13 12:21:27,848 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 1815 treesize of output 1623 [2022-12-13 12:21:27,878 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:21:27,879 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 1623 treesize of output 1576 [2022-12-13 12:21:27,908 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:21:27,909 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 1563 treesize of output 1552 [2022-12-13 12:21:27,930 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 1539 treesize of output 1491 [2022-12-13 12:21:27,977 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:21:27,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1511 treesize of output 1517 [2022-12-13 12:21:28,010 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:21:28,010 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 1467 treesize of output 1432 [2022-12-13 12:21:35,996 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:21:35,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807163953] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:21:35,996 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:21:35,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2022-12-13 12:21:35,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798782353] [2022-12-13 12:21:35,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:21:35,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-13 12:21:35,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:21:35,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-13 12:21:35,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=497, Unknown=5, NotChecked=46, Total=650 [2022-12-13 12:21:36,201 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 290 [2022-12-13 12:21:36,202 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 341 transitions, 5061 flow. Second operand has 26 states, 26 states have (on average 83.38461538461539) internal successors, (2168), 26 states have internal predecessors, (2168), 0 states have call successors, (0), 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 12:21:36,202 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:21:36,202 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 290 [2022-12-13 12:21:36,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:21:40,842 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 12:21:42,702 INFO L130 PetriNetUnfolder]: 3804/6680 cut-off events. [2022-12-13 12:21:42,702 INFO L131 PetriNetUnfolder]: For 245681/246584 co-relation queries the response was YES. [2022-12-13 12:21:42,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55357 conditions, 6680 events. 3804/6680 cut-off events. For 245681/246584 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 49513 event pairs, 518 based on Foata normal form. 242/6767 useless extension candidates. Maximal degree in co-relation 55274. Up to 2176 conditions per place. [2022-12-13 12:21:42,760 INFO L137 encePairwiseOnDemand]: 276/290 looper letters, 309 selfloop transitions, 303 changer transitions 3/636 dead transitions. [2022-12-13 12:21:42,760 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 636 transitions, 10561 flow [2022-12-13 12:21:42,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-13 12:21:42,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-12-13 12:21:42,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2212 transitions. [2022-12-13 12:21:42,763 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.30510344827586205 [2022-12-13 12:21:42,763 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2212 transitions. [2022-12-13 12:21:42,763 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2212 transitions. [2022-12-13 12:21:42,764 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:21:42,764 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2212 transitions. [2022-12-13 12:21:42,766 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 88.48) internal successors, (2212), 25 states have internal predecessors, (2212), 0 states have call successors, (0), 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 12:21:42,769 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 290.0) internal successors, (7540), 26 states have internal predecessors, (7540), 0 states have call successors, (0), 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 12:21:42,769 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 290.0) internal successors, (7540), 26 states have internal predecessors, (7540), 0 states have call successors, (0), 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 12:21:42,769 INFO L175 Difference]: Start difference. First operand has 233 places, 341 transitions, 5061 flow. Second operand 25 states and 2212 transitions. [2022-12-13 12:21:42,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 636 transitions, 10561 flow [2022-12-13 12:21:43,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 636 transitions, 10197 flow, removed 127 selfloop flow, removed 21 redundant places. [2022-12-13 12:21:43,287 INFO L231 Difference]: Finished difference. Result has 207 places, 501 transitions, 8947 flow [2022-12-13 12:21:43,287 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=4720, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=8947, PETRI_PLACES=207, PETRI_TRANSITIONS=501} [2022-12-13 12:21:43,287 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 170 predicate places. [2022-12-13 12:21:43,287 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 501 transitions, 8947 flow [2022-12-13 12:21:43,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 83.38461538461539) internal successors, (2168), 26 states have internal predecessors, (2168), 0 states have call successors, (0), 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 12:21:43,287 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:21:43,288 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:21:43,291 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-13 12:21:43,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:21:43,489 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-12-13 12:21:43,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:21:43,490 INFO L85 PathProgramCache]: Analyzing trace with hash 2089896380, now seen corresponding path program 2 times [2022-12-13 12:21:43,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:21:43,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472474510] [2022-12-13 12:21:43,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:21:43,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:21:43,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:21:44,904 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:21:44,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:21:44,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472474510] [2022-12-13 12:21:44,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472474510] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:21:44,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117092932] [2022-12-13 12:21:44,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 12:21:44,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:21:44,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:21:44,905 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:21:44,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-13 12:21:45,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 12:21:45,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:21:45,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-13 12:21:45,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:21:45,282 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 12:21:45,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:21:45,637 INFO L321 Elim1Store]: treesize reduction 12, result has 81.5 percent of original size [2022-12-13 12:21:45,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 228 treesize of output 206 [2022-12-13 12:21:46,149 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 12:21:46,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117092932] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:21:46,150 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:21:46,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 6] total 24 [2022-12-13 12:21:46,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877310282] [2022-12-13 12:21:46,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:21:46,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-13 12:21:46,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:21:46,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-13 12:21:46,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2022-12-13 12:21:47,775 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 290 [2022-12-13 12:21:47,776 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 501 transitions, 8947 flow. Second operand has 26 states, 26 states have (on average 96.53846153846153) internal successors, (2510), 26 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 12:21:47,776 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:21:47,776 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 290 [2022-12-13 12:21:47,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:21:54,153 INFO L130 PetriNetUnfolder]: 7818/12842 cut-off events. [2022-12-13 12:21:54,153 INFO L131 PetriNetUnfolder]: For 500976/500977 co-relation queries the response was YES. [2022-12-13 12:21:54,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123100 conditions, 12842 events. 7818/12842 cut-off events. For 500976/500977 co-relation queries the response was YES. Maximal size of possible extension queue 938. Compared 93857 event pairs, 496 based on Foata normal form. 467/13309 useless extension candidates. Maximal degree in co-relation 123022. Up to 5255 conditions per place. [2022-12-13 12:21:54,275 INFO L137 encePairwiseOnDemand]: 278/290 looper letters, 429 selfloop transitions, 725 changer transitions 18/1177 dead transitions. [2022-12-13 12:21:54,276 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 1177 transitions, 22465 flow [2022-12-13 12:21:54,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-12-13 12:21:54,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2022-12-13 12:21:54,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 5060 transitions. [2022-12-13 12:21:54,280 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3489655172413793 [2022-12-13 12:21:54,280 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 5060 transitions. [2022-12-13 12:21:54,281 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 5060 transitions. [2022-12-13 12:21:54,282 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:21:54,282 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 5060 transitions. [2022-12-13 12:21:54,285 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 101.2) internal successors, (5060), 50 states have internal predecessors, (5060), 0 states have call successors, (0), 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 12:21:54,292 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 290.0) internal successors, (14790), 51 states have internal predecessors, (14790), 0 states have call successors, (0), 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 12:21:54,293 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 290.0) internal successors, (14790), 51 states have internal predecessors, (14790), 0 states have call successors, (0), 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 12:21:54,293 INFO L175 Difference]: Start difference. First operand has 207 places, 501 transitions, 8947 flow. Second operand 50 states and 5060 transitions. [2022-12-13 12:21:54,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 1177 transitions, 22465 flow [2022-12-13 12:21:56,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 1177 transitions, 21374 flow, removed 518 selfloop flow, removed 9 redundant places. [2022-12-13 12:21:56,029 INFO L231 Difference]: Finished difference. Result has 271 places, 961 transitions, 19795 flow [2022-12-13 12:21:56,030 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=8375, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=344, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=19795, PETRI_PLACES=271, PETRI_TRANSITIONS=961} [2022-12-13 12:21:56,030 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 234 predicate places. [2022-12-13 12:21:56,030 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 961 transitions, 19795 flow [2022-12-13 12:21:56,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 96.53846153846153) internal successors, (2510), 26 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 12:21:56,030 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:21:56,031 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:21:56,035 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-13 12:21:56,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-12-13 12:21:56,232 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-12-13 12:21:56,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:21:56,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1473681602, now seen corresponding path program 1 times [2022-12-13 12:21:56,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:21:56,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802511043] [2022-12-13 12:21:56,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:21:56,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:21:56,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:21:56,865 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:21:56,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:21:56,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802511043] [2022-12-13 12:21:56,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802511043] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:21:56,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046951737] [2022-12-13 12:21:56,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:21:56,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:21:56,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:21:56,866 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:21:56,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-13 12:21:56,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:21:56,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 43 conjunts are in the unsatisfiable core [2022-12-13 12:21:56,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:21:57,058 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 12:21:57,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:21:57,124 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 20 treesize of output 22 [2022-12-13 12:21:57,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:21:57,196 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 20 treesize of output 22 [2022-12-13 12:21:57,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:21:57,484 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 31 treesize of output 31 [2022-12-13 12:21:57,590 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:21:57,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:21:57,648 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_901 (Array Int Int))) (< 0 (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_901) c_~queue~0.base)) (.cse1 (* c_~front~0 4))) (+ (select .cse0 (+ c_~queue~0.offset .cse1)) c_~sum~0 2147483649 (select .cse0 (+ c_~queue~0.offset .cse1 4)))))) is different from false [2022-12-13 12:21:58,186 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:21:58,186 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 97 treesize of output 73 [2022-12-13 12:21:58,217 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:21:58,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 645 treesize of output 651 [2022-12-13 12:21:58,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 444 treesize of output 340 [2022-12-13 12:21:58,277 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:21:58,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 309 treesize of output 297 [2022-12-13 12:21:58,298 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:21:58,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 440 treesize of output 390 [2022-12-13 12:22:02,394 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:22:02,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046951737] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:22:02,394 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:22:02,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 29 [2022-12-13 12:22:02,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616452101] [2022-12-13 12:22:02,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:22:02,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-13 12:22:02,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:22:02,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-13 12:22:02,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=752, Unknown=2, NotChecked=56, Total=930 [2022-12-13 12:22:02,572 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 290 [2022-12-13 12:22:02,573 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 961 transitions, 19795 flow. Second operand has 31 states, 31 states have (on average 75.54838709677419) internal successors, (2342), 31 states have internal predecessors, (2342), 0 states have call successors, (0), 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 12:22:02,573 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:22:02,573 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 290 [2022-12-13 12:22:02,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:22:06,966 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 12:22:09,669 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:22:14,717 WARN L539 Checker$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 12:22:19,826 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:22:23,804 WARN L539 Checker$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 12:22:27,431 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 12:22:29,486 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 12:22:33,675 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 12:22:46,554 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:22:48,608 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 12:22:50,219 INFO L130 PetriNetUnfolder]: 13696/21455 cut-off events. [2022-12-13 12:22:50,219 INFO L131 PetriNetUnfolder]: For 892725/892725 co-relation queries the response was YES. [2022-12-13 12:22:50,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210718 conditions, 21455 events. 13696/21455 cut-off events. For 892725/892725 co-relation queries the response was YES. Maximal size of possible extension queue 1283. Compared 153338 event pairs, 1898 based on Foata normal form. 313/21768 useless extension candidates. Maximal degree in co-relation 210617. Up to 9512 conditions per place. [2022-12-13 12:22:50,505 INFO L137 encePairwiseOnDemand]: 273/290 looper letters, 951 selfloop transitions, 814 changer transitions 0/1765 dead transitions. [2022-12-13 12:22:50,505 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 1765 transitions, 37995 flow [2022-12-13 12:22:50,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-12-13 12:22:50,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2022-12-13 12:22:50,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 5276 transitions. [2022-12-13 12:22:50,513 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.279893899204244 [2022-12-13 12:22:50,513 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 5276 transitions. [2022-12-13 12:22:50,513 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 5276 transitions. [2022-12-13 12:22:50,514 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:22:50,515 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 5276 transitions. [2022-12-13 12:22:50,520 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 81.16923076923077) internal successors, (5276), 65 states have internal predecessors, (5276), 0 states have call successors, (0), 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 12:22:50,530 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 290.0) internal successors, (19140), 66 states have internal predecessors, (19140), 0 states have call successors, (0), 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 12:22:50,531 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 290.0) internal successors, (19140), 66 states have internal predecessors, (19140), 0 states have call successors, (0), 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 12:22:50,531 INFO L175 Difference]: Start difference. First operand has 271 places, 961 transitions, 19795 flow. Second operand 65 states and 5276 transitions. [2022-12-13 12:22:50,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 1765 transitions, 37995 flow [2022-12-13 12:22:59,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 1765 transitions, 33219 flow, removed 2254 selfloop flow, removed 12 redundant places. [2022-12-13 12:22:59,350 INFO L231 Difference]: Finished difference. Result has 356 places, 1418 transitions, 28822 flow [2022-12-13 12:22:59,351 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=17249, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=949, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=415, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=28822, PETRI_PLACES=356, PETRI_TRANSITIONS=1418} [2022-12-13 12:22:59,351 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 319 predicate places. [2022-12-13 12:22:59,351 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 1418 transitions, 28822 flow [2022-12-13 12:22:59,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 75.54838709677419) internal successors, (2342), 31 states have internal predecessors, (2342), 0 states have call successors, (0), 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 12:22:59,351 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:22:59,351 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:22:59,356 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-13 12:22:59,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:22:59,553 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-12-13 12:22:59,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:22:59,554 INFO L85 PathProgramCache]: Analyzing trace with hash 2025065195, now seen corresponding path program 3 times [2022-12-13 12:22:59,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:22:59,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139419958] [2022-12-13 12:22:59,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:22:59,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:22:59,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:23:00,064 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:23:00,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:23:00,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139419958] [2022-12-13 12:23:00,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139419958] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:23:00,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41429917] [2022-12-13 12:23:00,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 12:23:00,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:23:00,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:23:00,065 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:23:00,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-13 12:23:00,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 12:23:00,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:23:00,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-13 12:23:00,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:23:00,242 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 13 treesize of output 9 [2022-12-13 12:23:00,281 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 6 treesize of output 5 [2022-12-13 12:23:00,311 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 6 treesize of output 5 [2022-12-13 12:23:00,539 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:23:00,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:23:01,527 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:23:01,527 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 123 treesize of output 87 [2022-12-13 12:23:01,563 INFO L321 Elim1Store]: treesize reduction 14, result has 73.6 percent of original size [2022-12-13 12:23:01,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 562 treesize of output 532 [2022-12-13 12:23:01,577 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 12:23:01,592 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:23:01,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 397 treesize of output 383 [2022-12-13 12:23:01,631 INFO L321 Elim1Store]: treesize reduction 14, result has 73.6 percent of original size [2022-12-13 12:23:01,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 442 treesize of output 376 [2022-12-13 12:23:02,382 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:23:02,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41429917] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:23:02,383 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:23:02,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 28 [2022-12-13 12:23:02,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123432679] [2022-12-13 12:23:02,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:23:02,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-13 12:23:02,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:23:02,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-13 12:23:02,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=644, Unknown=2, NotChecked=0, Total=870 [2022-12-13 12:23:02,977 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 290 [2022-12-13 12:23:02,978 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 1418 transitions, 28822 flow. Second operand has 30 states, 30 states have (on average 78.5) internal successors, (2355), 30 states have internal predecessors, (2355), 0 states have call successors, (0), 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 12:23:02,978 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:23:02,978 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 290 [2022-12-13 12:23:02,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:23:21,995 INFO L130 PetriNetUnfolder]: 16056/25267 cut-off events. [2022-12-13 12:23:21,995 INFO L131 PetriNetUnfolder]: For 1016206/1016206 co-relation queries the response was YES. [2022-12-13 12:23:22,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 250111 conditions, 25267 events. 16056/25267 cut-off events. For 1016206/1016206 co-relation queries the response was YES. Maximal size of possible extension queue 1501. Compared 185908 event pairs, 1633 based on Foata normal form. 456/25723 useless extension candidates. Maximal degree in co-relation 249979. Up to 12678 conditions per place. [2022-12-13 12:23:22,380 INFO L137 encePairwiseOnDemand]: 277/290 looper letters, 1145 selfloop transitions, 1109 changer transitions 3/2257 dead transitions. [2022-12-13 12:23:22,380 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 2257 transitions, 50665 flow [2022-12-13 12:23:22,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-12-13 12:23:22,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2022-12-13 12:23:22,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 4901 transitions. [2022-12-13 12:23:22,386 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.2913793103448276 [2022-12-13 12:23:22,386 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 4901 transitions. [2022-12-13 12:23:22,386 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 4901 transitions. [2022-12-13 12:23:22,387 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:23:22,387 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 4901 transitions. [2022-12-13 12:23:22,390 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 84.5) internal successors, (4901), 58 states have internal predecessors, (4901), 0 states have call successors, (0), 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 12:23:22,402 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 290.0) internal successors, (17110), 59 states have internal predecessors, (17110), 0 states have call successors, (0), 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 12:23:22,404 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 290.0) internal successors, (17110), 59 states have internal predecessors, (17110), 0 states have call successors, (0), 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 12:23:22,404 INFO L175 Difference]: Start difference. First operand has 356 places, 1418 transitions, 28822 flow. Second operand 58 states and 4901 transitions. [2022-12-13 12:23:22,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 2257 transitions, 50665 flow [2022-12-13 12:23:40,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 2257 transitions, 47997 flow, removed 1255 selfloop flow, removed 13 redundant places. [2022-12-13 12:23:40,999 INFO L231 Difference]: Finished difference. Result has 432 places, 1891 transitions, 42726 flow [2022-12-13 12:23:41,000 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=24853, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=604, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=557, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=42726, PETRI_PLACES=432, PETRI_TRANSITIONS=1891} [2022-12-13 12:23:41,000 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 395 predicate places. [2022-12-13 12:23:41,000 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 1891 transitions, 42726 flow [2022-12-13 12:23:41,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 78.5) internal successors, (2355), 30 states have internal predecessors, (2355), 0 states have call successors, (0), 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 12:23:41,000 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:23:41,000 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:23:41,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-12-13 12:23:41,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-12-13 12:23:41,201 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-12-13 12:23:41,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:23:41,202 INFO L85 PathProgramCache]: Analyzing trace with hash 180304312, now seen corresponding path program 2 times [2022-12-13 12:23:41,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:23:41,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772515334] [2022-12-13 12:23:41,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:23:41,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:23:41,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:23:42,295 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:23:42,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:23:42,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772515334] [2022-12-13 12:23:42,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772515334] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:23:42,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451389608] [2022-12-13 12:23:42,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 12:23:42,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:23:42,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:23:42,297 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:23:42,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-13 12:23:42,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 12:23:42,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:23:42,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-13 12:23:42,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:23:42,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:23:42,623 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 12:23:42,678 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 12:23:42,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:23:42,845 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:23:42,845 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 82 treesize of output 70 [2022-12-13 12:23:42,884 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 11 treesize of output 5 [2022-12-13 12:23:43,133 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 12:23:43,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451389608] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:23:43,133 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:23:43,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 7] total 26 [2022-12-13 12:23:43,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137839883] [2022-12-13 12:23:43,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:23:43,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-13 12:23:43,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:23:43,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-13 12:23:43,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=654, Unknown=10, NotChecked=0, Total=756 [2022-12-13 12:23:44,633 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 290 [2022-12-13 12:23:44,634 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 1891 transitions, 42726 flow. Second operand has 28 states, 28 states have (on average 85.53571428571429) internal successors, (2395), 28 states have internal predecessors, (2395), 0 states have call successors, (0), 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 12:23:44,634 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:23:44,634 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 290 [2022-12-13 12:23:44,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:24:19,360 WARN L233 SmtUtils]: Spent 28.30s on a formula simplification. DAG size of input: 50 DAG size of output: 48 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 12:24:32,652 INFO L130 PetriNetUnfolder]: 14486/22801 cut-off events. [2022-12-13 12:24:32,652 INFO L131 PetriNetUnfolder]: For 1196926/1196926 co-relation queries the response was YES. [2022-12-13 12:24:32,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 240297 conditions, 22801 events. 14486/22801 cut-off events. For 1196926/1196926 co-relation queries the response was YES. Maximal size of possible extension queue 1284. Compared 164101 event pairs, 2062 based on Foata normal form. 761/23562 useless extension candidates. Maximal degree in co-relation 240132. Up to 11847 conditions per place. [2022-12-13 12:24:33,039 INFO L137 encePairwiseOnDemand]: 278/290 looper letters, 1176 selfloop transitions, 888 changer transitions 1/2065 dead transitions. [2022-12-13 12:24:33,039 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 2065 transitions, 48881 flow [2022-12-13 12:24:33,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-13 12:24:33,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-12-13 12:24:33,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2786 transitions. [2022-12-13 12:24:33,042 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3098998887652948 [2022-12-13 12:24:33,042 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2786 transitions. [2022-12-13 12:24:33,042 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2786 transitions. [2022-12-13 12:24:33,043 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:24:33,043 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2786 transitions. [2022-12-13 12:24:33,045 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 89.87096774193549) internal successors, (2786), 31 states have internal predecessors, (2786), 0 states have call successors, (0), 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 12:24:33,049 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 290.0) internal successors, (9280), 32 states have internal predecessors, (9280), 0 states have call successors, (0), 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 12:24:33,049 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 290.0) internal successors, (9280), 32 states have internal predecessors, (9280), 0 states have call successors, (0), 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 12:24:33,049 INFO L175 Difference]: Start difference. First operand has 432 places, 1891 transitions, 42726 flow. Second operand 31 states and 2786 transitions. [2022-12-13 12:24:33,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 2065 transitions, 48881 flow [2022-12-13 12:24:56,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 2065 transitions, 45858 flow, removed 1447 selfloop flow, removed 14 redundant places. [2022-12-13 12:24:56,182 INFO L231 Difference]: Finished difference. Result has 457 places, 1882 transitions, 42414 flow [2022-12-13 12:24:56,183 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=36239, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1750, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=761, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=953, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=42414, PETRI_PLACES=457, PETRI_TRANSITIONS=1882} [2022-12-13 12:24:56,183 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 420 predicate places. [2022-12-13 12:24:56,183 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 1882 transitions, 42414 flow [2022-12-13 12:24:56,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 85.53571428571429) internal successors, (2395), 28 states have internal predecessors, (2395), 0 states have call successors, (0), 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 12:24:56,184 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:24:56,184 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:24:56,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-12-13 12:24:56,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-12-13 12:24:56,385 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-12-13 12:24:56,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:24:56,385 INFO L85 PathProgramCache]: Analyzing trace with hash 457305401, now seen corresponding path program 2 times [2022-12-13 12:24:56,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:24:56,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321888559] [2022-12-13 12:24:56,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:24:56,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:24:56,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:24:57,281 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:24:57,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:24:57,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321888559] [2022-12-13 12:24:57,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321888559] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:24:57,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007659537] [2022-12-13 12:24:57,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 12:24:57,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:24:57,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:24:57,282 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:24:57,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-13 12:24:57,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 12:24:57,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:24:57,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-13 12:24:57,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:24:57,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:24:57,687 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 44 treesize of output 42 [2022-12-13 12:24:57,716 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 12:24:57,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:24:57,735 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1055 (Array Int Int))) (< 0 (+ c_~sum~0 2147483649 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1055) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4)))))) is different from false [2022-12-13 12:24:57,741 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1055 (Array Int Int))) (< 0 (let ((.cse0 (* c_~front~0 4))) (+ c_~sum~0 2147483649 (select (select |c_#memory_int| c_~queue~0.base) (+ c_~queue~0.offset .cse0)) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1055) c_~queue~0.base) (+ c_~queue~0.offset .cse0 4)))))) is different from false [2022-12-13 12:24:58,001 INFO L321 Elim1Store]: treesize reduction 12, result has 81.5 percent of original size [2022-12-13 12:24:58,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 248 treesize of output 227 [2022-12-13 12:24:58,012 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 18 treesize of output 11 [2022-12-13 12:24:58,558 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 1 not checked. [2022-12-13 12:24:58,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007659537] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:24:58,558 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:24:58,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 7] total 28 [2022-12-13 12:24:58,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588875386] [2022-12-13 12:24:58,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:24:58,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-13 12:24:58,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:24:58,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-13 12:24:58,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=657, Unknown=2, NotChecked=106, Total=870 [2022-12-13 12:24:58,679 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 290 [2022-12-13 12:24:58,680 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 1882 transitions, 42414 flow. Second operand has 30 states, 30 states have (on average 81.63333333333334) internal successors, (2449), 30 states have internal predecessors, (2449), 0 states have call successors, (0), 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 12:24:58,680 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:24:58,681 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 290 [2022-12-13 12:24:58,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:25:08,733 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 12:25:12,357 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:25:21,963 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:25:23,984 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:25:26,733 WARN L539 Checker$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 12:25:29,141 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:25:32,752 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:25:34,777 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:25:37,115 WARN L539 Checker$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 12:25:44,076 INFO L130 PetriNetUnfolder]: 16155/25536 cut-off events. [2022-12-13 12:25:44,076 INFO L131 PetriNetUnfolder]: For 1407706/1407706 co-relation queries the response was YES. [2022-12-13 12:25:44,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 272770 conditions, 25536 events. 16155/25536 cut-off events. For 1407706/1407706 co-relation queries the response was YES. Maximal size of possible extension queue 1483. Compared 188308 event pairs, 1128 based on Foata normal form. 842/26378 useless extension candidates. Maximal degree in co-relation 272601. Up to 9700 conditions per place. [2022-12-13 12:25:44,566 INFO L137 encePairwiseOnDemand]: 274/290 looper letters, 1062 selfloop transitions, 1408 changer transitions 12/2482 dead transitions. [2022-12-13 12:25:44,566 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 496 places, 2482 transitions, 59430 flow [2022-12-13 12:25:44,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-12-13 12:25:44,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2022-12-13 12:25:44,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 3549 transitions. [2022-12-13 12:25:44,571 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.2984861227922624 [2022-12-13 12:25:44,571 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 3549 transitions. [2022-12-13 12:25:44,571 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 3549 transitions. [2022-12-13 12:25:44,572 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:25:44,572 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 3549 transitions. [2022-12-13 12:25:44,575 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 86.5609756097561) internal successors, (3549), 41 states have internal predecessors, (3549), 0 states have call successors, (0), 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 12:25:44,580 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 290.0) internal successors, (12180), 42 states have internal predecessors, (12180), 0 states have call successors, (0), 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 12:25:44,581 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 290.0) internal successors, (12180), 42 states have internal predecessors, (12180), 0 states have call successors, (0), 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 12:25:44,581 INFO L175 Difference]: Start difference. First operand has 457 places, 1882 transitions, 42414 flow. Second operand 41 states and 3549 transitions. [2022-12-13 12:25:44,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 496 places, 2482 transitions, 59430 flow [2022-12-13 12:26:09,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 2482 transitions, 57482 flow, removed 863 selfloop flow, removed 13 redundant places. [2022-12-13 12:26:09,335 INFO L231 Difference]: Finished difference. Result has 504 places, 2220 transitions, 54124 flow [2022-12-13 12:26:09,336 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=38918, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1807, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1025, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=683, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=54124, PETRI_PLACES=504, PETRI_TRANSITIONS=2220} [2022-12-13 12:26:09,336 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 467 predicate places. [2022-12-13 12:26:09,336 INFO L495 AbstractCegarLoop]: Abstraction has has 504 places, 2220 transitions, 54124 flow [2022-12-13 12:26:09,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 81.63333333333334) internal successors, (2449), 30 states have internal predecessors, (2449), 0 states have call successors, (0), 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 12:26:09,337 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:26:09,337 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:26:09,341 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-12-13 12:26:09,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-12-13 12:26:09,538 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-12-13 12:26:09,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:26:09,538 INFO L85 PathProgramCache]: Analyzing trace with hash 457305402, now seen corresponding path program 1 times [2022-12-13 12:26:09,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:26:09,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554073306] [2022-12-13 12:26:09,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:26:09,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:26:09,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:26:10,868 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:26:10,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:26:10,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554073306] [2022-12-13 12:26:10,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554073306] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:26:10,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708737527] [2022-12-13 12:26:10,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:26:10,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:26:10,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:26:10,869 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:26:10,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-13 12:26:10,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:26:10,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-13 12:26:10,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:26:11,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:26:11,352 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 44 treesize of output 42 [2022-12-13 12:26:11,392 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 12:26:11,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:26:11,424 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1108 (Array Int Int))) (< (+ c_~sum~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1108) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4)))) 2147483648)) is different from false [2022-12-13 12:26:11,694 INFO L321 Elim1Store]: treesize reduction 12, result has 81.5 percent of original size [2022-12-13 12:26:11,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 246 treesize of output 225 [2022-12-13 12:26:11,705 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 17 treesize of output 10 [2022-12-13 12:26:12,324 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 12:26:12,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708737527] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:26:12,325 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:26:12,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 7] total 28 [2022-12-13 12:26:12,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849496953] [2022-12-13 12:26:12,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:26:12,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-13 12:26:12,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:26:12,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-13 12:26:12,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=716, Unknown=5, NotChecked=54, Total=870 [2022-12-13 12:26:12,550 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 290 [2022-12-13 12:26:12,551 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 504 places, 2220 transitions, 54124 flow. Second operand has 30 states, 30 states have (on average 75.63333333333334) internal successors, (2269), 30 states have internal predecessors, (2269), 0 states have call successors, (0), 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 12:26:12,551 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:26:12,551 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 290 [2022-12-13 12:26:12,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:26:18,467 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 12:26:22,908 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:26:27,507 WARN L539 Checker$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 12:26:46,384 INFO L130 PetriNetUnfolder]: 24203/38037 cut-off events. [2022-12-13 12:26:46,384 INFO L131 PetriNetUnfolder]: For 2516151/2516151 co-relation queries the response was YES. [2022-12-13 12:26:47,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 472449 conditions, 38037 events. 24203/38037 cut-off events. For 2516151/2516151 co-relation queries the response was YES. Maximal size of possible extension queue 2224. Compared 294820 event pairs, 2899 based on Foata normal form. 678/38715 useless extension candidates. Maximal degree in co-relation 472261. Up to 18629 conditions per place. [2022-12-13 12:26:47,422 INFO L137 encePairwiseOnDemand]: 274/290 looper letters, 2499 selfloop transitions, 1435 changer transitions 22/3956 dead transitions. [2022-12-13 12:26:47,422 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 542 places, 3956 transitions, 104203 flow [2022-12-13 12:26:47,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-12-13 12:26:47,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2022-12-13 12:26:47,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 3388 transitions. [2022-12-13 12:26:47,426 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.27816091954022987 [2022-12-13 12:26:47,426 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 3388 transitions. [2022-12-13 12:26:47,426 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 3388 transitions. [2022-12-13 12:26:47,427 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:26:47,427 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 3388 transitions. [2022-12-13 12:26:47,430 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 80.66666666666667) internal successors, (3388), 42 states have internal predecessors, (3388), 0 states have call successors, (0), 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 12:26:47,436 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 290.0) internal successors, (12470), 43 states have internal predecessors, (12470), 0 states have call successors, (0), 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 12:26:47,437 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 290.0) internal successors, (12470), 43 states have internal predecessors, (12470), 0 states have call successors, (0), 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 12:26:47,437 INFO L175 Difference]: Start difference. First operand has 504 places, 2220 transitions, 54124 flow. Second operand 42 states and 3388 transitions. [2022-12-13 12:26:47,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 542 places, 3956 transitions, 104203 flow [2022-12-13 12:28:10,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 522 places, 3956 transitions, 95996 flow, removed 3474 selfloop flow, removed 20 redundant places. [2022-12-13 12:28:10,503 INFO L231 Difference]: Finished difference. Result has 533 places, 2972 transitions, 74464 flow [2022-12-13 12:28:10,504 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=48485, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=649, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1060, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=74464, PETRI_PLACES=533, PETRI_TRANSITIONS=2972} [2022-12-13 12:28:10,504 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 496 predicate places. [2022-12-13 12:28:10,504 INFO L495 AbstractCegarLoop]: Abstraction has has 533 places, 2972 transitions, 74464 flow [2022-12-13 12:28:10,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 75.63333333333334) internal successors, (2269), 30 states have internal predecessors, (2269), 0 states have call successors, (0), 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 12:28:10,505 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:28:10,505 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:28:10,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-12-13 12:28:10,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:28:10,706 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-12-13 12:28:10,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:28:10,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1742508693, now seen corresponding path program 2 times [2022-12-13 12:28:10,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:28:10,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187600038] [2022-12-13 12:28:10,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:28:10,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:28:10,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:28:11,511 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:28:11,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:28:11,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187600038] [2022-12-13 12:28:11,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187600038] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:28:11,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033888083] [2022-12-13 12:28:11,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 12:28:11,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:28:11,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:28:11,512 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:28:11,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-13 12:28:11,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 12:28:11,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:28:11,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 43 conjunts are in the unsatisfiable core [2022-12-13 12:28:11,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:28:12,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:28:12,138 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 44 treesize of output 42 [2022-12-13 12:28:12,174 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:28:12,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:28:12,659 INFO L321 Elim1Store]: treesize reduction 12, result has 81.5 percent of original size [2022-12-13 12:28:12,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 277 treesize of output 247 [2022-12-13 12:28:12,670 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 32 treesize of output 18 [2022-12-13 12:28:13,435 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:28:13,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033888083] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:28:13,435 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:28:13,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2022-12-13 12:28:13,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273873062] [2022-12-13 12:28:13,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:28:13,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-13 12:28:13,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:28:13,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-13 12:28:13,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=830, Unknown=6, NotChecked=0, Total=992 [2022-12-13 12:28:15,246 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 290 [2022-12-13 12:28:15,247 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 533 places, 2972 transitions, 74464 flow. Second operand has 32 states, 32 states have (on average 81.5) internal successors, (2608), 32 states have internal predecessors, (2608), 0 states have call successors, (0), 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 12:28:15,247 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:28:15,247 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 290 [2022-12-13 12:28:15,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:28:36,483 WARN L233 SmtUtils]: Spent 6.17s on a formula simplification that was a NOOP. DAG size: 62 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 12:28:40,718 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:28:48,778 WARN L539 Checker$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 12:28:50,845 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:28:57,477 WARN L539 Checker$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 12:29:02,480 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:29:08,648 WARN L539 Checker$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 12:29:10,654 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:29:15,737 WARN L539 Checker$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 12:29:25,937 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:29:29,214 WARN L539 Checker$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 12:29:37,485 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:29:39,501 WARN L539 Checker$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 12:29:42,677 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:29:49,947 WARN L539 Checker$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 12:29:56,212 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:29:58,242 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:30:00,257 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:30:02,273 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:30:05,605 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:30:07,633 WARN L539 Checker$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 12:30:09,869 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:30:11,876 WARN L539 Checker$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 12:30:13,882 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:30:19,347 WARN L539 Checker$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 12:30:22,042 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:30:24,608 WARN L539 Checker$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 12:30:26,626 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:30:28,748 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:30:33,193 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:30:35,209 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:30:38,167 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:30:40,181 WARN L539 Checker$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 12:30:43,816 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:30:46,468 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:30:49,081 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:30:51,996 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:30:54,413 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:30:54,756 INFO L130 PetriNetUnfolder]: 28719/45388 cut-off events. [2022-12-13 12:30:54,756 INFO L131 PetriNetUnfolder]: For 3026222/3026222 co-relation queries the response was YES. [2022-12-13 12:30:55,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 598330 conditions, 45388 events. 28719/45388 cut-off events. For 3026222/3026222 co-relation queries the response was YES. Maximal size of possible extension queue 2348. Compared 357186 event pairs, 2769 based on Foata normal form. 839/46227 useless extension candidates. Maximal degree in co-relation 598135. Up to 18552 conditions per place. [2022-12-13 12:30:56,109 INFO L137 encePairwiseOnDemand]: 277/290 looper letters, 1817 selfloop transitions, 2286 changer transitions 26/4129 dead transitions. [2022-12-13 12:30:56,110 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 594 places, 4129 transitions, 115561 flow [2022-12-13 12:30:56,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-12-13 12:30:56,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2022-12-13 12:30:56,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 6360 transitions. [2022-12-13 12:30:56,128 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.300425129900803 [2022-12-13 12:30:56,128 INFO L72 ComplementDD]: Start complementDD. Operand 73 states and 6360 transitions. [2022-12-13 12:30:56,128 INFO L73 IsDeterministic]: Start isDeterministic. Operand 73 states and 6360 transitions. [2022-12-13 12:30:56,129 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:30:56,129 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 73 states and 6360 transitions. [2022-12-13 12:30:56,134 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 74 states, 73 states have (on average 87.12328767123287) internal successors, (6360), 73 states have internal predecessors, (6360), 0 states have call successors, (0), 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 12:30:56,144 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 74 states, 74 states have (on average 290.0) internal successors, (21460), 74 states have internal predecessors, (21460), 0 states have call successors, (0), 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 12:30:56,146 INFO L81 ComplementDD]: Finished complementDD. Result has 74 states, 74 states have (on average 290.0) internal successors, (21460), 74 states have internal predecessors, (21460), 0 states have call successors, (0), 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 12:30:56,146 INFO L175 Difference]: Start difference. First operand has 533 places, 2972 transitions, 74464 flow. Second operand 73 states and 6360 transitions. [2022-12-13 12:30:56,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 594 places, 4129 transitions, 115561 flow [2022-12-13 12:32:30,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 576 places, 4129 transitions, 112065 flow, removed 1564 selfloop flow, removed 18 redundant places. [2022-12-13 12:32:30,164 INFO L231 Difference]: Finished difference. Result has 627 places, 3620 transitions, 101458 flow [2022-12-13 12:32:30,165 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=63125, PETRI_DIFFERENCE_MINUEND_PLACES=504, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1386, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=978, PETRI_DIFFERENCE_SUBTRAHEND_STATES=73, PETRI_FLOW=101458, PETRI_PLACES=627, PETRI_TRANSITIONS=3620} [2022-12-13 12:32:30,165 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 590 predicate places. [2022-12-13 12:32:30,165 INFO L495 AbstractCegarLoop]: Abstraction has has 627 places, 3620 transitions, 101458 flow [2022-12-13 12:32:30,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 81.5) internal successors, (2608), 32 states have internal predecessors, (2608), 0 states have call successors, (0), 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 12:32:30,166 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:32:30,166 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:32:30,170 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-12-13 12:32:30,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-13 12:32:30,367 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-12-13 12:32:30,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:32:30,368 INFO L85 PathProgramCache]: Analyzing trace with hash 362281721, now seen corresponding path program 3 times [2022-12-13 12:32:30,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:32:30,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681920272] [2022-12-13 12:32:30,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:32:30,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:32:30,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:32:32,582 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:32:32,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:32:32,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681920272] [2022-12-13 12:32:32,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681920272] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:32:32,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309071377] [2022-12-13 12:32:32,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 12:32:32,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:32:32,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:32:32,584 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:32:32,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fff60c6-4118-469f-9b39-d9f939106c41/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-13 12:32:32,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 12:32:32,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:32:32,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-13 12:32:32,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:32:33,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:32:33,086 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 44 treesize of output 42 [2022-12-13 12:32:33,124 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 12:32:33,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:32:33,148 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1212 (Array Int Int))) (< 0 (+ c_~sum~0 2147483649 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1212) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4)))))) is different from false [2022-12-13 12:32:33,518 INFO L321 Elim1Store]: treesize reduction 12, result has 81.5 percent of original size [2022-12-13 12:32:33,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 248 treesize of output 227 [2022-12-13 12:32:33,530 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 18 treesize of output 11 [2022-12-13 12:32:34,040 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 12:32:34,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309071377] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:32:34,041 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:32:34,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 7] total 26 [2022-12-13 12:32:34,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929443764] [2022-12-13 12:32:34,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:32:34,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-13 12:32:34,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:32:34,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-13 12:32:34,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=609, Unknown=2, NotChecked=50, Total=756 [2022-12-13 12:32:34,104 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 290 [2022-12-13 12:32:34,105 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 627 places, 3620 transitions, 101458 flow. Second operand has 28 states, 28 states have (on average 75.67857142857143) internal successors, (2119), 28 states have internal predecessors, (2119), 0 states have call successors, (0), 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 12:32:34,105 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:32:34,105 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 290 [2022-12-13 12:32:34,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:32:37,108 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_~front~0 4))) (let ((.cse2 (+ c_~queue~0.offset .cse0)) (.cse1 (select |c_#memory_int| c_~queue~0.base))) (let ((.cse3 (let ((.cse5 (not (<= c_~back~0 2147483646))) (.cse6 (= (mod |c_thread2Thread1of1ForFork2_~b~0#1| 256) 0)) (.cse7 (select .cse1 (+ c_~queue~0.offset (* c_~back~0 4))))) (and (or .cse5 .cse6 (not (= .cse7 1))) (or .cse5 (not .cse6) (not (= (+ .cse7 1) 0)))))) (.cse4 (forall ((v_ArrVal_1212 (Array Int Int))) (< 0 (+ c_~sum~0 2147483649 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1212) c_~queue~0.base) .cse2)))))) (and (or (forall ((v_ArrVal_1212 (Array Int Int))) (< 0 (+ c_~sum~0 2147483649 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1212) c_~queue~0.base) (+ c_~queue~0.offset .cse0 4)) (select .cse1 .cse2)))) (= (mod c_~v_assert~0 256) 0) .cse3) (or .cse4 (= (mod |c_thread2Thread1of1ForFork2_~cond~1#1| 256) 0) .cse3) .cse4)))) is different from false [2022-12-13 12:32:39,589 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (forall ((v_ArrVal_1212 (Array Int Int))) (< 0 (+ c_~sum~0 2147483649 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1212) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4)))))))) (and (or .cse0 (= (mod |c_thread2Thread1of1ForFork2_~cond~1#1| 256) 0) (let ((.cse1 (not (<= c_~back~0 2147483646))) (.cse2 (= (mod |c_thread2Thread1of1ForFork2_~b~0#1| 256) 0)) (.cse3 (select (select |c_#memory_int| c_~queue~0.base) (+ c_~queue~0.offset (* c_~back~0 4))))) (and (or .cse1 .cse2 (not (= .cse3 1))) (or .cse1 (not .cse2) (not (= (+ .cse3 1) 0)))))) .cse0)) is different from false [2022-12-13 12:32:45,821 WARN L539 Checker$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 12:32:47,877 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:33:03,644 WARN L233 SmtUtils]: Spent 6.19s on a formula simplification that was a NOOP. DAG size: 54 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 12:33:13,909 WARN L233 SmtUtils]: Spent 6.16s on a formula simplification that was a NOOP. DAG size: 55 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 12:33:15,932 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:33:27,280 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:33:29,316 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:33:39,139 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:33:41,183 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1]