./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/pthread-atomic/qrcu-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12423181-7256-44a5-b087-e8ab1d462361/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12423181-7256-44a5-b087-e8ab1d462361/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12423181-7256-44a5-b087-e8ab1d462361/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12423181-7256-44a5-b087-e8ab1d462361/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread-atomic/qrcu-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12423181-7256-44a5-b087-e8ab1d462361/bin/utaipan-7li7fVZpFI/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12423181-7256-44a5-b087-e8ab1d462361/bin/utaipan-7li7fVZpFI --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d1980d3c26a5811df2d100379a9d31e1e9ec963bc59bfe660be33ada51bfb014 --- 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-5e519f3 [2022-11-03 03:59:35,323 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:59:35,326 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:59:35,364 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:59:35,365 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:59:35,366 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:59:35,367 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:59:35,369 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:59:35,370 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:59:35,371 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:59:35,372 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:59:35,373 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:59:35,373 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:59:35,375 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:59:35,376 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:59:35,377 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:59:35,377 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:59:35,378 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:59:35,380 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:59:35,382 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:59:35,383 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:59:35,387 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:59:35,389 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:59:35,389 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:59:35,393 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:59:35,393 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:59:35,393 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:59:35,394 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:59:35,395 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:59:35,396 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:59:35,396 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:59:35,397 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:59:35,398 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:59:35,398 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:59:35,400 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:59:35,400 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:59:35,410 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:59:35,411 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:59:35,411 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:59:35,412 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:59:35,413 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:59:35,414 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12423181-7256-44a5-b087-e8ab1d462361/bin/utaipan-7li7fVZpFI/config/svcomp-Overflow-32bit-Taipan_Default.epf [2022-11-03 03:59:35,459 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:59:35,459 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:59:35,460 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:59:35,460 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:59:35,461 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:59:35,461 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:59:35,461 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:59:35,461 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:59:35,461 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:59:35,462 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 03:59:35,462 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:59:35,462 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:59:35,462 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 03:59:35,462 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 03:59:35,463 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:59:35,463 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 03:59:35,463 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 03:59:35,463 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 03:59:35,464 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:59:35,464 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 03:59:35,467 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-03 03:59:35,467 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 03:59:35,468 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 03:59:35,468 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:59:35,468 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:59:35,469 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:59:35,469 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:59:35,469 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-03 03:59:35,470 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 03:59:35,470 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:59:35,470 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:59:35,470 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:59:35,471 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:59:35,471 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:59:35,471 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:59:35,471 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:59:35,472 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 03:59:35,472 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:59:35,473 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:59:35,473 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 03:59:35,473 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 03:59:35,473 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:59:35,474 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:59:35,474 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12423181-7256-44a5-b087-e8ab1d462361/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12423181-7256-44a5-b087-e8ab1d462361/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d1980d3c26a5811df2d100379a9d31e1e9ec963bc59bfe660be33ada51bfb014 [2022-11-03 03:59:35,777 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:59:35,796 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:59:35,799 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:59:35,800 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:59:35,801 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:59:35,802 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12423181-7256-44a5-b087-e8ab1d462361/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/pthread-atomic/qrcu-2.i [2022-11-03 03:59:35,894 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12423181-7256-44a5-b087-e8ab1d462361/bin/utaipan-7li7fVZpFI/data/e93e06ac7/222a67b9e8e447c5ab6609ca2745adab/FLAG08bc634c5 [2022-11-03 03:59:36,397 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:59:36,397 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12423181-7256-44a5-b087-e8ab1d462361/sv-benchmarks/c/pthread-atomic/qrcu-2.i [2022-11-03 03:59:36,410 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12423181-7256-44a5-b087-e8ab1d462361/bin/utaipan-7li7fVZpFI/data/e93e06ac7/222a67b9e8e447c5ab6609ca2745adab/FLAG08bc634c5 [2022-11-03 03:59:36,709 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12423181-7256-44a5-b087-e8ab1d462361/bin/utaipan-7li7fVZpFI/data/e93e06ac7/222a67b9e8e447c5ab6609ca2745adab [2022-11-03 03:59:36,712 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:59:36,713 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:59:36,715 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:59:36,715 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:59:36,718 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:59:36,719 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:59:36" (1/1) ... [2022-11-03 03:59:36,720 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@323b04c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:59:36, skipping insertion in model container [2022-11-03 03:59:36,721 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:59:36" (1/1) ... [2022-11-03 03:59:36,728 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:59:36,760 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:59:37,246 WARN L230 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_12423181-7256-44a5-b087-e8ab1d462361/sv-benchmarks/c/pthread-atomic/qrcu-2.i[30690,30703] [2022-11-03 03:59:37,249 WARN L230 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_12423181-7256-44a5-b087-e8ab1d462361/sv-benchmarks/c/pthread-atomic/qrcu-2.i[30912,30925] [2022-11-03 03:59:37,284 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:59:37,297 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:59:37,349 WARN L230 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_12423181-7256-44a5-b087-e8ab1d462361/sv-benchmarks/c/pthread-atomic/qrcu-2.i[30690,30703] [2022-11-03 03:59:37,351 WARN L230 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_12423181-7256-44a5-b087-e8ab1d462361/sv-benchmarks/c/pthread-atomic/qrcu-2.i[30912,30925] [2022-11-03 03:59:37,364 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:59:37,413 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:59:37,413 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:59:37 WrapperNode [2022-11-03 03:59:37,413 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:59:37,415 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:59:37,416 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:59:37,416 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:59:37,425 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:59:37" (1/1) ... [2022-11-03 03:59:37,448 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:59:37" (1/1) ... [2022-11-03 03:59:37,491 INFO L138 Inliner]: procedures = 177, calls = 44, calls flagged for inlining = 15, calls inlined = 17, statements flattened = 294 [2022-11-03 03:59:37,497 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:59:37,498 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:59:37,498 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:59:37,498 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:59:37,507 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:59:37" (1/1) ... [2022-11-03 03:59:37,508 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:59:37" (1/1) ... [2022-11-03 03:59:37,511 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:59:37" (1/1) ... [2022-11-03 03:59:37,511 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:59:37" (1/1) ... [2022-11-03 03:59:37,517 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:59:37" (1/1) ... [2022-11-03 03:59:37,522 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:59:37" (1/1) ... [2022-11-03 03:59:37,524 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:59:37" (1/1) ... [2022-11-03 03:59:37,526 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:59:37" (1/1) ... [2022-11-03 03:59:37,546 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:59:37,547 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:59:37,547 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:59:37,547 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:59:37,548 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:59:37" (1/1) ... [2022-11-03 03:59:37,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:59:37,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12423181-7256-44a5-b087-e8ab1d462361/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:59:37,586 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12423181-7256-44a5-b087-e8ab1d462361/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:59:37,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12423181-7256-44a5-b087-e8ab1d462361/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:59:37,644 INFO L130 BoogieDeclarations]: Found specification of procedure qrcu_reader1 [2022-11-03 03:59:37,644 INFO L138 BoogieDeclarations]: Found implementation of procedure qrcu_reader1 [2022-11-03 03:59:37,645 INFO L130 BoogieDeclarations]: Found specification of procedure qrcu_reader2 [2022-11-03 03:59:37,645 INFO L138 BoogieDeclarations]: Found implementation of procedure qrcu_reader2 [2022-11-03 03:59:37,646 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 03:59:37,646 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 03:59:37,646 INFO L130 BoogieDeclarations]: Found specification of procedure qrcu_updater [2022-11-03 03:59:37,646 INFO L138 BoogieDeclarations]: Found implementation of procedure qrcu_updater [2022-11-03 03:59:37,646 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-03 03:59:37,647 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 03:59:37,647 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 03:59:37,647 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 03:59:37,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 03:59:37,647 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:59:37,648 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:59:37,649 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-03 03:59:37,870 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:59:37,880 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:59:38,415 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:59:38,746 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:59:38,747 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-03 03:59:38,752 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:59:38 BoogieIcfgContainer [2022-11-03 03:59:38,752 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:59:38,754 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:59:38,756 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:59:38,760 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:59:38,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:59:36" (1/3) ... [2022-11-03 03:59:38,763 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f8f4c7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:59:38, skipping insertion in model container [2022-11-03 03:59:38,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:59:37" (2/3) ... [2022-11-03 03:59:38,764 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f8f4c7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:59:38, skipping insertion in model container [2022-11-03 03:59:38,764 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:59:38" (3/3) ... [2022-11-03 03:59:38,770 INFO L112 eAbstractionObserver]: Analyzing ICFG qrcu-2.i [2022-11-03 03:59:38,779 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-03 03:59:38,790 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:59:38,791 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 32 error locations. [2022-11-03 03:59:38,792 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-03 03:59:38,951 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-03 03:59:39,003 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-03 03:59:39,023 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 217 places, 225 transitions, 474 flow [2022-11-03 03:59:39,026 INFO L112 LiptonReduction]: Starting Lipton reduction on Petri net that has 217 places, 225 transitions, 474 flow [2022-11-03 03:59:39,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 217 places, 225 transitions, 474 flow [2022-11-03 03:59:39,114 INFO L130 PetriNetUnfolder]: 18/222 cut-off events. [2022-11-03 03:59:39,115 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-03 03:59:39,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 235 conditions, 222 events. 18/222 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 570 event pairs, 0 based on Foata normal form. 0/172 useless extension candidates. Maximal degree in co-relation 176. Up to 4 conditions per place. [2022-11-03 03:59:39,129 INFO L118 LiptonReduction]: Number of co-enabled transitions 17086 [2022-11-03 03:59:46,837 INFO L133 LiptonReduction]: Checked pairs total: 46495 [2022-11-03 03:59:46,837 INFO L135 LiptonReduction]: Total number of compositions: 182 [2022-11-03 03:59:46,848 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 98 places, 101 transitions, 226 flow [2022-11-03 03:59:47,968 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 23098 states, 21721 states have (on average 4.034022374660466) internal successors, (87623), 23097 states have internal predecessors, (87623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:47,994 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:59:48,002 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=FINITE_AUTOMATA, 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;@dd01e7f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:59:48,002 INFO L358 AbstractCegarLoop]: Starting to check reachability of 67 error locations. [2022-11-03 03:59:48,051 INFO L276 IsEmpty]: Start isEmpty. Operand has 23098 states, 21721 states have (on average 4.034022374660466) internal successors, (87623), 23097 states have internal predecessors, (87623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:48,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-03 03:59:48,056 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:59:48,056 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-03 03:59:48,057 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting qrcu_reader1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [qrcu_reader1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2022-11-03 03:59:48,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:59:48,064 INFO L85 PathProgramCache]: Analyzing trace with hash 39003203, now seen corresponding path program 1 times [2022-11-03 03:59:48,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:59:48,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30761610] [2022-11-03 03:59:48,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:59:48,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:59:48,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:59:48,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:59:48,408 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:59:48,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30761610] [2022-11-03 03:59:48,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30761610] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:59:48,421 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:59:48,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-03 03:59:48,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141763979] [2022-11-03 03:59:48,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:59:48,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-03 03:59:48,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:59:48,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-03 03:59:48,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 03:59:48,507 INFO L87 Difference]: Start difference. First operand has 23098 states, 21721 states have (on average 4.034022374660466) internal successors, (87623), 23097 states have internal predecessors, (87623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 1 states have (on average 4.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:48,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:59:48,990 INFO L93 Difference]: Finished difference Result 17698 states and 64975 transitions. [2022-11-03 03:59:48,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-03 03:59:48,993 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 1 states have (on average 4.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-03 03:59:48,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:59:49,205 INFO L225 Difference]: With dead ends: 17698 [2022-11-03 03:59:49,206 INFO L226 Difference]: Without dead ends: 17692 [2022-11-03 03:59:49,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 03:59:49,210 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:59:49,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 30 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:59:49,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17692 states. [2022-11-03 03:59:50,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17692 to 17692. [2022-11-03 03:59:50,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17692 states, 16860 states have (on average 3.852787663107948) internal successors, (64958), 17691 states have internal predecessors, (64958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:50,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17692 states to 17692 states and 64958 transitions. [2022-11-03 03:59:50,296 INFO L78 Accepts]: Start accepts. Automaton has 17692 states and 64958 transitions. Word has length 4 [2022-11-03 03:59:50,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:59:50,300 INFO L495 AbstractCegarLoop]: Abstraction has 17692 states and 64958 transitions. [2022-11-03 03:59:50,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 1 states have (on average 4.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:50,300 INFO L276 IsEmpty]: Start isEmpty. Operand 17692 states and 64958 transitions. [2022-11-03 03:59:50,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-03 03:59:50,301 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:59:50,301 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-03 03:59:50,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 03:59:50,304 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting qrcu_reader1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [qrcu_reader1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2022-11-03 03:59:50,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:59:50,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1209098035, now seen corresponding path program 1 times [2022-11-03 03:59:50,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:59:50,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386875076] [2022-11-03 03:59:50,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:59:50,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:59:50,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:59:50,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:59:50,501 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:59:50,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386875076] [2022-11-03 03:59:50,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386875076] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:59:50,501 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:59:50,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-03 03:59:50,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023180915] [2022-11-03 03:59:50,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:59:50,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:59:50,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:59:50,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:59:50,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:59:50,504 INFO L87 Difference]: Start difference. First operand 17692 states and 64958 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:51,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:59:51,175 INFO L93 Difference]: Finished difference Result 12394 states and 44240 transitions. [2022-11-03 03:59:51,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:59:51,176 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-03 03:59:51,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:59:51,309 INFO L225 Difference]: With dead ends: 12394 [2022-11-03 03:59:51,309 INFO L226 Difference]: Without dead ends: 12394 [2022-11-03 03:59:51,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:59:51,311 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 55 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:59:51,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 37 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 03:59:51,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12394 states. [2022-11-03 03:59:51,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12394 to 12376. [2022-11-03 03:59:52,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12376 states, 11925 states have (on average 3.709098532494759) internal successors, (44231), 12375 states have internal predecessors, (44231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:52,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12376 states to 12376 states and 44231 transitions. [2022-11-03 03:59:52,111 INFO L78 Accepts]: Start accepts. Automaton has 12376 states and 44231 transitions. Word has length 5 [2022-11-03 03:59:52,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:59:52,112 INFO L495 AbstractCegarLoop]: Abstraction has 12376 states and 44231 transitions. [2022-11-03 03:59:52,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:52,112 INFO L276 IsEmpty]: Start isEmpty. Operand 12376 states and 44231 transitions. [2022-11-03 03:59:52,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-03 03:59:52,113 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:59:52,113 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-03 03:59:52,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 03:59:52,118 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting qrcu_reader1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [qrcu_reader1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2022-11-03 03:59:52,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:59:52,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1209097990, now seen corresponding path program 1 times [2022-11-03 03:59:52,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:59:52,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717164129] [2022-11-03 03:59:52,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:59:52,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:59:52,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:59:52,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:59:52,233 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:59:52,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717164129] [2022-11-03 03:59:52,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717164129] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:59:52,234 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:59:52,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-03 03:59:52,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623862378] [2022-11-03 03:59:52,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:59:52,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:59:52,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:59:52,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:59:52,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:59:52,236 INFO L87 Difference]: Start difference. First operand 12376 states and 44231 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:52,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:59:52,670 INFO L93 Difference]: Finished difference Result 11788 states and 41914 transitions. [2022-11-03 03:59:52,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:59:52,671 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-03 03:59:52,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:59:52,747 INFO L225 Difference]: With dead ends: 11788 [2022-11-03 03:59:52,747 INFO L226 Difference]: Without dead ends: 11788 [2022-11-03 03:59:52,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:59:52,752 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 49 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:59:52,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 41 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:59:52,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11788 states. [2022-11-03 03:59:53,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11788 to 11784. [2022-11-03 03:59:53,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11784 states, 11362 states have (on average 3.688435134659391) internal successors, (41908), 11783 states have internal predecessors, (41908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:53,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11784 states to 11784 states and 41908 transitions. [2022-11-03 03:59:53,394 INFO L78 Accepts]: Start accepts. Automaton has 11784 states and 41908 transitions. Word has length 5 [2022-11-03 03:59:53,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:59:53,395 INFO L495 AbstractCegarLoop]: Abstraction has 11784 states and 41908 transitions. [2022-11-03 03:59:53,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:53,395 INFO L276 IsEmpty]: Start isEmpty. Operand 11784 states and 41908 transitions. [2022-11-03 03:59:53,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-03 03:59:53,396 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:59:53,396 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:59:53,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 03:59:53,396 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting qrcu_reader1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [qrcu_reader1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2022-11-03 03:59:53,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:59:53,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1650017780, now seen corresponding path program 1 times [2022-11-03 03:59:53,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:59:53,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444967147] [2022-11-03 03:59:53,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:59:53,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:59:53,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:59:53,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:59:53,497 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:59:53,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444967147] [2022-11-03 03:59:53,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444967147] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:59:53,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:59:53,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 03:59:53,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988796747] [2022-11-03 03:59:53,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:59:53,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:59:53,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:59:53,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:59:53,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:59:53,499 INFO L87 Difference]: Start difference. First operand 11784 states and 41908 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:53,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:59:53,837 INFO L93 Difference]: Finished difference Result 12788 states and 42960 transitions. [2022-11-03 03:59:53,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:59:53,838 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-03 03:59:53,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:59:54,015 INFO L225 Difference]: With dead ends: 12788 [2022-11-03 03:59:54,015 INFO L226 Difference]: Without dead ends: 12788 [2022-11-03 03:59:54,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:59:54,018 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 167 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:59:54,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 64 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:59:54,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12788 states. [2022-11-03 03:59:54,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12788 to 12070. [2022-11-03 03:59:54,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12070 states, 11758 states have (on average 3.583432556557238) internal successors, (42134), 12069 states have internal predecessors, (42134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:54,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12070 states to 12070 states and 42134 transitions. [2022-11-03 03:59:54,551 INFO L78 Accepts]: Start accepts. Automaton has 12070 states and 42134 transitions. Word has length 8 [2022-11-03 03:59:54,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:59:54,551 INFO L495 AbstractCegarLoop]: Abstraction has 12070 states and 42134 transitions. [2022-11-03 03:59:54,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:54,552 INFO L276 IsEmpty]: Start isEmpty. Operand 12070 states and 42134 transitions. [2022-11-03 03:59:54,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-03 03:59:54,553 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:59:54,554 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:59:54,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 03:59:54,559 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting qrcu_reader1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [qrcu_reader1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2022-11-03 03:59:54,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:59:54,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1650017779, now seen corresponding path program 1 times [2022-11-03 03:59:54,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:59:54,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705464882] [2022-11-03 03:59:54,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:59:54,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:59:54,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:59:54,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:59:54,640 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:59:54,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705464882] [2022-11-03 03:59:54,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705464882] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:59:54,640 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:59:54,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 03:59:54,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467737295] [2022-11-03 03:59:54,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:59:54,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:59:54,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:59:54,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:59:54,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:59:54,642 INFO L87 Difference]: Start difference. First operand 12070 states and 42134 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:54,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:59:54,991 INFO L93 Difference]: Finished difference Result 11866 states and 40625 transitions. [2022-11-03 03:59:54,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:59:54,991 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-03 03:59:54,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:59:55,043 INFO L225 Difference]: With dead ends: 11866 [2022-11-03 03:59:55,043 INFO L226 Difference]: Without dead ends: 11866 [2022-11-03 03:59:55,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:59:55,044 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 124 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:59:55,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 68 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 03:59:55,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11866 states. [2022-11-03 03:59:55,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11866 to 11452. [2022-11-03 03:59:55,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11452 states, 11212 states have (on average 3.5820549411344986) internal successors, (40162), 11451 states have internal predecessors, (40162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:55,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11452 states to 11452 states and 40162 transitions. [2022-11-03 03:59:55,626 INFO L78 Accepts]: Start accepts. Automaton has 11452 states and 40162 transitions. Word has length 8 [2022-11-03 03:59:55,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:59:55,626 INFO L495 AbstractCegarLoop]: Abstraction has 11452 states and 40162 transitions. [2022-11-03 03:59:55,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:55,627 INFO L276 IsEmpty]: Start isEmpty. Operand 11452 states and 40162 transitions. [2022-11-03 03:59:55,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-03 03:59:55,628 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:59:55,628 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:59:55,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 03:59:55,629 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting qrcu_updaterErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [qrcu_reader1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2022-11-03 03:59:55,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:59:55,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1746154602, now seen corresponding path program 1 times [2022-11-03 03:59:55,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:59:55,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982009672] [2022-11-03 03:59:55,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:59:55,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:59:55,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:59:55,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:59:55,727 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:59:55,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982009672] [2022-11-03 03:59:55,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982009672] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:59:55,728 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:59:55,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 03:59:55,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327300134] [2022-11-03 03:59:55,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:59:55,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:59:55,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:59:55,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:59:55,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:59:55,730 INFO L87 Difference]: Start difference. First operand 11452 states and 40162 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:56,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:59:56,267 INFO L93 Difference]: Finished difference Result 12094 states and 42503 transitions. [2022-11-03 03:59:56,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:59:56,268 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-03 03:59:56,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:59:56,317 INFO L225 Difference]: With dead ends: 12094 [2022-11-03 03:59:56,317 INFO L226 Difference]: Without dead ends: 12094 [2022-11-03 03:59:56,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:59:56,320 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 63 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:59:56,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 36 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 03:59:56,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12094 states. [2022-11-03 03:59:56,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12094 to 11996. [2022-11-03 03:59:56,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11996 states, 11756 states have (on average 3.59237835998639) internal successors, (42232), 11995 states have internal predecessors, (42232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:56,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11996 states to 11996 states and 42232 transitions. [2022-11-03 03:59:56,761 INFO L78 Accepts]: Start accepts. Automaton has 11996 states and 42232 transitions. Word has length 9 [2022-11-03 03:59:56,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:59:56,762 INFO L495 AbstractCegarLoop]: Abstraction has 11996 states and 42232 transitions. [2022-11-03 03:59:56,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:56,763 INFO L276 IsEmpty]: Start isEmpty. Operand 11996 states and 42232 transitions. [2022-11-03 03:59:56,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-03 03:59:56,764 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:59:56,764 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:59:56,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 03:59:56,765 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting qrcu_updaterErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [qrcu_reader1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2022-11-03 03:59:56,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:59:56,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1746153767, now seen corresponding path program 1 times [2022-11-03 03:59:56,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:59:56,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328121513] [2022-11-03 03:59:56,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:59:56,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:59:56,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:59:56,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:59:56,832 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:59:56,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328121513] [2022-11-03 03:59:56,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328121513] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:59:56,833 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:59:56,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 03:59:56,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514868085] [2022-11-03 03:59:56,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:59:56,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:59:56,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:59:56,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:59:56,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:59:56,834 INFO L87 Difference]: Start difference. First operand 11996 states and 42232 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:57,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:59:57,115 INFO L93 Difference]: Finished difference Result 11900 states and 41840 transitions. [2022-11-03 03:59:57,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:59:57,115 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-03 03:59:57,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:59:57,162 INFO L225 Difference]: With dead ends: 11900 [2022-11-03 03:59:57,162 INFO L226 Difference]: Without dead ends: 11900 [2022-11-03 03:59:57,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:59:57,163 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 38 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:59:57,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 33 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:59:57,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11900 states. [2022-11-03 03:59:57,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11900 to 11900. [2022-11-03 03:59:57,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11900 states, 11660 states have (on average 3.588336192109777) internal successors, (41840), 11899 states have internal predecessors, (41840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:57,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11900 states to 11900 states and 41840 transitions. [2022-11-03 03:59:57,653 INFO L78 Accepts]: Start accepts. Automaton has 11900 states and 41840 transitions. Word has length 9 [2022-11-03 03:59:57,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:59:57,653 INFO L495 AbstractCegarLoop]: Abstraction has 11900 states and 41840 transitions. [2022-11-03 03:59:57,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:57,654 INFO L276 IsEmpty]: Start isEmpty. Operand 11900 states and 41840 transitions. [2022-11-03 03:59:57,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-03 03:59:57,662 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:59:57,662 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:59:57,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-03 03:59:57,663 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting qrcu_updaterErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [qrcu_reader1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2022-11-03 03:59:57,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:59:57,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1968595780, now seen corresponding path program 1 times [2022-11-03 03:59:57,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:59:57,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686558477] [2022-11-03 03:59:57,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:59:57,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:59:57,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:59:57,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:59:57,783 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:59:57,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686558477] [2022-11-03 03:59:57,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686558477] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:59:57,784 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:59:57,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:59:57,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450988595] [2022-11-03 03:59:57,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:59:57,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:59:57,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:59:57,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:59:57,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:59:57,786 INFO L87 Difference]: Start difference. First operand 11900 states and 41840 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:58,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:59:58,356 INFO L93 Difference]: Finished difference Result 12700 states and 44408 transitions. [2022-11-03 03:59:58,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:59:58,357 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-03 03:59:58,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:59:58,405 INFO L225 Difference]: With dead ends: 12700 [2022-11-03 03:59:58,405 INFO L226 Difference]: Without dead ends: 12700 [2022-11-03 03:59:58,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:59:58,406 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 64 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:59:58,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 51 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 03:59:58,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12700 states. [2022-11-03 03:59:58,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12700 to 12100. [2022-11-03 03:59:58,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12100 states, 11860 states have (on average 3.581956155143339) internal successors, (42482), 12099 states have internal predecessors, (42482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:58,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12100 states to 12100 states and 42482 transitions. [2022-11-03 03:59:58,852 INFO L78 Accepts]: Start accepts. Automaton has 12100 states and 42482 transitions. Word has length 12 [2022-11-03 03:59:58,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:59:58,852 INFO L495 AbstractCegarLoop]: Abstraction has 12100 states and 42482 transitions. [2022-11-03 03:59:58,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:58,853 INFO L276 IsEmpty]: Start isEmpty. Operand 12100 states and 42482 transitions. [2022-11-03 03:59:58,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-03 03:59:58,855 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:59:58,855 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:59:58,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 03:59:58,855 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting qrcu_updaterErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [qrcu_reader1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2022-11-03 03:59:58,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:59:58,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1968561465, now seen corresponding path program 1 times [2022-11-03 03:59:58,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:59:58,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151749447] [2022-11-03 03:59:58,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:59:58,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:59:58,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:59:59,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:59:59,030 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:59:59,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151749447] [2022-11-03 03:59:59,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151749447] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:59:59,030 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:59:59,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:59:59,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374147139] [2022-11-03 03:59:59,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:59:59,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:59:59,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:59:59,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:59:59,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:59:59,032 INFO L87 Difference]: Start difference. First operand 12100 states and 42482 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:59,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:59:59,805 INFO L93 Difference]: Finished difference Result 15864 states and 54115 transitions. [2022-11-03 03:59:59,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:59:59,806 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-03 03:59:59,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:59:59,903 INFO L225 Difference]: With dead ends: 15864 [2022-11-03 03:59:59,903 INFO L226 Difference]: Without dead ends: 15864 [2022-11-03 03:59:59,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:59:59,904 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 198 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:59:59,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 45 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 03:59:59,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15864 states. [2022-11-03 04:00:00,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15864 to 12580. [2022-11-03 04:00:00,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12580 states, 12344 states have (on average 3.6155217109526894) internal successors, (44630), 12579 states have internal predecessors, (44630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:00,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12580 states to 12580 states and 44630 transitions. [2022-11-03 04:00:00,270 INFO L78 Accepts]: Start accepts. Automaton has 12580 states and 44630 transitions. Word has length 12 [2022-11-03 04:00:00,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:00:00,270 INFO L495 AbstractCegarLoop]: Abstraction has 12580 states and 44630 transitions. [2022-11-03 04:00:00,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:00,271 INFO L276 IsEmpty]: Start isEmpty. Operand 12580 states and 44630 transitions. [2022-11-03 04:00:00,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-03 04:00:00,272 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:00:00,272 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:00:00,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-03 04:00:00,273 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting qrcu_updaterErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [qrcu_reader1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2022-11-03 04:00:00,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:00:00,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1968562300, now seen corresponding path program 2 times [2022-11-03 04:00:00,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:00:00,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475316343] [2022-11-03 04:00:00,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:00,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:00:00,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:00,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:00:00,441 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:00:00,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475316343] [2022-11-03 04:00:00,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475316343] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:00:00,441 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:00:00,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 04:00:00,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395750503] [2022-11-03 04:00:00,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:00:00,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:00:00,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:00:00,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:00:00,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:00:00,443 INFO L87 Difference]: Start difference. First operand 12580 states and 44630 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:00,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:00:00,919 INFO L93 Difference]: Finished difference Result 13112 states and 46213 transitions. [2022-11-03 04:00:00,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:00:00,920 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-03 04:00:00,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:00:00,973 INFO L225 Difference]: With dead ends: 13112 [2022-11-03 04:00:00,973 INFO L226 Difference]: Without dead ends: 13112 [2022-11-03 04:00:00,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:00:00,974 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 135 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 04:00:00,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 48 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 04:00:01,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13112 states. [2022-11-03 04:00:01,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13112 to 12300. [2022-11-03 04:00:01,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12300 states, 12068 states have (on average 3.617335101093802) internal successors, (43654), 12299 states have internal predecessors, (43654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:01,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12300 states to 12300 states and 43654 transitions. [2022-11-03 04:00:01,509 INFO L78 Accepts]: Start accepts. Automaton has 12300 states and 43654 transitions. Word has length 12 [2022-11-03 04:00:01,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:00:01,509 INFO L495 AbstractCegarLoop]: Abstraction has 12300 states and 43654 transitions. [2022-11-03 04:00:01,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:01,510 INFO L276 IsEmpty]: Start isEmpty. Operand 12300 states and 43654 transitions. [2022-11-03 04:00:01,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-03 04:00:01,511 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:00:01,511 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:00:01,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-03 04:00:01,511 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting qrcu_updaterErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [qrcu_reader1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2022-11-03 04:00:01,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:00:01,512 INFO L85 PathProgramCache]: Analyzing trace with hash -897160384, now seen corresponding path program 1 times [2022-11-03 04:00:01,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:00:01,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548607061] [2022-11-03 04:00:01,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:01,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:00:01,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:01,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:00:01,609 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:00:01,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548607061] [2022-11-03 04:00:01,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548607061] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:00:01,610 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:00:01,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 04:00:01,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158811102] [2022-11-03 04:00:01,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:00:01,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:00:01,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:00:01,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:00:01,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:00:01,612 INFO L87 Difference]: Start difference. First operand 12300 states and 43654 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:01,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:00:01,909 INFO L93 Difference]: Finished difference Result 12808 states and 45504 transitions. [2022-11-03 04:00:01,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:00:01,909 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-03 04:00:01,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:00:01,945 INFO L225 Difference]: With dead ends: 12808 [2022-11-03 04:00:01,945 INFO L226 Difference]: Without dead ends: 12808 [2022-11-03 04:00:01,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:00:01,946 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 67 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:00:01,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 43 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:00:01,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12808 states. [2022-11-03 04:00:02,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12808 to 12596. [2022-11-03 04:00:02,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12596 states, 12364 states have (on average 3.623584600452928) internal successors, (44802), 12595 states have internal predecessors, (44802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:02,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12596 states to 12596 states and 44802 transitions. [2022-11-03 04:00:02,359 INFO L78 Accepts]: Start accepts. Automaton has 12596 states and 44802 transitions. Word has length 13 [2022-11-03 04:00:02,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:00:02,360 INFO L495 AbstractCegarLoop]: Abstraction has 12596 states and 44802 transitions. [2022-11-03 04:00:02,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:02,360 INFO L276 IsEmpty]: Start isEmpty. Operand 12596 states and 44802 transitions. [2022-11-03 04:00:02,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-03 04:00:02,361 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:00:02,361 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:00:02,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-03 04:00:02,362 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting qrcu_updaterErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [qrcu_reader1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2022-11-03 04:00:02,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:00:02,362 INFO L85 PathProgramCache]: Analyzing trace with hash -895862261, now seen corresponding path program 1 times [2022-11-03 04:00:02,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:00:02,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716872666] [2022-11-03 04:00:02,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:02,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:00:02,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:02,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:00:02,490 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:00:02,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716872666] [2022-11-03 04:00:02,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716872666] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:00:02,490 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:00:02,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 04:00:02,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348394660] [2022-11-03 04:00:02,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:00:02,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:00:02,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:00:02,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:00:02,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:00:02,492 INFO L87 Difference]: Start difference. First operand 12596 states and 44802 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:02,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:00:02,973 INFO L93 Difference]: Finished difference Result 13456 states and 47746 transitions. [2022-11-03 04:00:02,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:00:02,974 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-03 04:00:02,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:00:03,027 INFO L225 Difference]: With dead ends: 13456 [2022-11-03 04:00:03,027 INFO L226 Difference]: Without dead ends: 13456 [2022-11-03 04:00:03,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:00:03,028 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 144 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 04:00:03,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 45 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 505 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 04:00:03,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13456 states. [2022-11-03 04:00:03,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13456 to 12472. [2022-11-03 04:00:03,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12472 states, 12242 states have (on average 3.625388008495344) internal successors, (44382), 12471 states have internal predecessors, (44382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:03,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12472 states to 12472 states and 44382 transitions. [2022-11-03 04:00:03,631 INFO L78 Accepts]: Start accepts. Automaton has 12472 states and 44382 transitions. Word has length 13 [2022-11-03 04:00:03,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:00:03,631 INFO L495 AbstractCegarLoop]: Abstraction has 12472 states and 44382 transitions. [2022-11-03 04:00:03,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:03,632 INFO L276 IsEmpty]: Start isEmpty. Operand 12472 states and 44382 transitions. [2022-11-03 04:00:03,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-03 04:00:03,638 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:00:03,638 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:00:03,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-03 04:00:03,639 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting qrcu_updaterErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [qrcu_reader1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2022-11-03 04:00:03,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:00:03,639 INFO L85 PathProgramCache]: Analyzing trace with hash -895888144, now seen corresponding path program 2 times [2022-11-03 04:00:03,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:00:03,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353181403] [2022-11-03 04:00:03,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:03,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:00:03,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:03,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:00:03,804 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:00:03,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353181403] [2022-11-03 04:00:03,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353181403] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:00:03,804 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:00:03,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 04:00:03,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163746643] [2022-11-03 04:00:03,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:00:03,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:00:03,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:00:03,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:00:03,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:00:03,806 INFO L87 Difference]: Start difference. First operand 12472 states and 44382 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:04,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:00:04,334 INFO L93 Difference]: Finished difference Result 13956 states and 49651 transitions. [2022-11-03 04:00:04,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:00:04,335 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-03 04:00:04,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:00:04,385 INFO L225 Difference]: With dead ends: 13956 [2022-11-03 04:00:04,386 INFO L226 Difference]: Without dead ends: 13956 [2022-11-03 04:00:04,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:00:04,386 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 153 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 04:00:04,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 49 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 04:00:04,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13956 states. [2022-11-03 04:00:04,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13956 to 12028. [2022-11-03 04:00:04,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12028 states, 11800 states have (on average 3.617966101694915) internal successors, (42692), 12027 states have internal predecessors, (42692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:04,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12028 states to 12028 states and 42692 transitions. [2022-11-03 04:00:04,774 INFO L78 Accepts]: Start accepts. Automaton has 12028 states and 42692 transitions. Word has length 13 [2022-11-03 04:00:04,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:00:04,774 INFO L495 AbstractCegarLoop]: Abstraction has 12028 states and 42692 transitions. [2022-11-03 04:00:04,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:04,775 INFO L276 IsEmpty]: Start isEmpty. Operand 12028 states and 42692 transitions. [2022-11-03 04:00:04,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-03 04:00:04,776 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:00:04,777 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:00:04,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-03 04:00:04,777 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting qrcu_reader1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [qrcu_reader1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2022-11-03 04:00:04,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:00:04,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1562994633, now seen corresponding path program 1 times [2022-11-03 04:00:04,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:00:04,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140910130] [2022-11-03 04:00:04,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:04,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:00:04,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:04,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:00:04,906 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:00:04,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140910130] [2022-11-03 04:00:04,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140910130] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:00:04,906 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:00:04,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 04:00:04,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163254355] [2022-11-03 04:00:04,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:00:04,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:00:04,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:00:04,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:00:04,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:00:04,908 INFO L87 Difference]: Start difference. First operand 12028 states and 42692 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:05,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:00:05,312 INFO L93 Difference]: Finished difference Result 11114 states and 38898 transitions. [2022-11-03 04:00:05,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 04:00:05,313 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-03 04:00:05,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:00:05,346 INFO L225 Difference]: With dead ends: 11114 [2022-11-03 04:00:05,346 INFO L226 Difference]: Without dead ends: 11094 [2022-11-03 04:00:05,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:00:05,347 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 168 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:00:05,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 47 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:00:05,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11094 states. [2022-11-03 04:00:05,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11094 to 10668. [2022-11-03 04:00:05,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10668 states, 10489 states have (on average 3.537134140528172) internal successors, (37101), 10667 states have internal predecessors, (37101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:05,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10668 states to 10668 states and 37101 transitions. [2022-11-03 04:00:05,578 INFO L78 Accepts]: Start accepts. Automaton has 10668 states and 37101 transitions. Word has length 13 [2022-11-03 04:00:05,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:00:05,578 INFO L495 AbstractCegarLoop]: Abstraction has 10668 states and 37101 transitions. [2022-11-03 04:00:05,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:05,578 INFO L276 IsEmpty]: Start isEmpty. Operand 10668 states and 37101 transitions. [2022-11-03 04:00:05,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-03 04:00:05,579 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:00:05,580 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:00:05,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-03 04:00:05,580 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting qrcu_reader2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [qrcu_reader1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2022-11-03 04:00:05,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:00:05,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1562995742, now seen corresponding path program 1 times [2022-11-03 04:00:05,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:00:05,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896521086] [2022-11-03 04:00:05,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:05,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:00:05,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:05,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:00:05,654 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:00:05,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896521086] [2022-11-03 04:00:05,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896521086] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:00:05,654 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:00:05,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 04:00:05,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311610383] [2022-11-03 04:00:05,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:00:05,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:00:05,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:00:05,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:00:05,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:00:05,656 INFO L87 Difference]: Start difference. First operand 10668 states and 37101 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:06,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:00:06,013 INFO L93 Difference]: Finished difference Result 9798 states and 33450 transitions. [2022-11-03 04:00:06,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:00:06,014 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-03 04:00:06,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:00:06,039 INFO L225 Difference]: With dead ends: 9798 [2022-11-03 04:00:06,039 INFO L226 Difference]: Without dead ends: 9798 [2022-11-03 04:00:06,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:00:06,040 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 182 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 04:00:06,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 84 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 04:00:06,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9798 states. [2022-11-03 04:00:06,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9798 to 9020. [2022-11-03 04:00:06,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9020 states, 8895 states have (on average 3.52973580663294) internal successors, (31397), 9019 states have internal predecessors, (31397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:06,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9020 states to 9020 states and 31397 transitions. [2022-11-03 04:00:06,279 INFO L78 Accepts]: Start accepts. Automaton has 9020 states and 31397 transitions. Word has length 13 [2022-11-03 04:00:06,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:00:06,279 INFO L495 AbstractCegarLoop]: Abstraction has 9020 states and 31397 transitions. [2022-11-03 04:00:06,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:06,279 INFO L276 IsEmpty]: Start isEmpty. Operand 9020 states and 31397 transitions. [2022-11-03 04:00:06,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-03 04:00:06,282 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:00:06,282 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:00:06,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-03 04:00:06,283 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting qrcu_updaterErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [qrcu_reader1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2022-11-03 04:00:06,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:00:06,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1215082772, now seen corresponding path program 1 times [2022-11-03 04:00:06,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:00:06,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792361554] [2022-11-03 04:00:06,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:06,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:00:06,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:06,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:00:06,402 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:00:06,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792361554] [2022-11-03 04:00:06,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792361554] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:00:06,403 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:00:06,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:00:06,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871048998] [2022-11-03 04:00:06,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:00:06,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 04:00:06,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:00:06,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 04:00:06,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:00:06,404 INFO L87 Difference]: Start difference. First operand 9020 states and 31397 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:06,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:00:06,774 INFO L93 Difference]: Finished difference Result 10024 states and 34417 transitions. [2022-11-03 04:00:06,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 04:00:06,775 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-03 04:00:06,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:00:06,805 INFO L225 Difference]: With dead ends: 10024 [2022-11-03 04:00:06,805 INFO L226 Difference]: Without dead ends: 10024 [2022-11-03 04:00:06,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:00:06,806 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 121 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 04:00:06,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 47 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 04:00:06,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10024 states. [2022-11-03 04:00:06,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10024 to 9268. [2022-11-03 04:00:06,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9268 states, 9143 states have (on average 3.5214918516898175) internal successors, (32197), 9267 states have internal predecessors, (32197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:06,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9268 states to 9268 states and 32197 transitions. [2022-11-03 04:00:06,985 INFO L78 Accepts]: Start accepts. Automaton has 9268 states and 32197 transitions. Word has length 15 [2022-11-03 04:00:06,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:00:06,985 INFO L495 AbstractCegarLoop]: Abstraction has 9268 states and 32197 transitions. [2022-11-03 04:00:06,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:06,985 INFO L276 IsEmpty]: Start isEmpty. Operand 9268 states and 32197 transitions. [2022-11-03 04:00:06,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-03 04:00:06,988 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:00:06,988 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:00:06,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-03 04:00:06,989 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting qrcu_updaterErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [qrcu_reader1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2022-11-03 04:00:06,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:00:06,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1810888083, now seen corresponding path program 1 times [2022-11-03 04:00:06,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:00:06,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059992211] [2022-11-03 04:00:06,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:06,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:00:07,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:07,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:00:07,125 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:00:07,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059992211] [2022-11-03 04:00:07,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059992211] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:00:07,126 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:00:07,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:00:07,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405471861] [2022-11-03 04:00:07,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:00:07,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 04:00:07,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:00:07,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 04:00:07,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:00:07,128 INFO L87 Difference]: Start difference. First operand 9268 states and 32197 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:07,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:00:07,639 INFO L93 Difference]: Finished difference Result 12152 states and 41554 transitions. [2022-11-03 04:00:07,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 04:00:07,640 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-03 04:00:07,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:00:07,681 INFO L225 Difference]: With dead ends: 12152 [2022-11-03 04:00:07,681 INFO L226 Difference]: Without dead ends: 12152 [2022-11-03 04:00:07,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:00:07,682 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 271 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 04:00:07,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 46 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 04:00:07,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12152 states. [2022-11-03 04:00:07,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12152 to 9340. [2022-11-03 04:00:07,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9340 states, 9215 states have (on average 3.5206728160607703) internal successors, (32443), 9339 states have internal predecessors, (32443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:07,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9340 states to 9340 states and 32443 transitions. [2022-11-03 04:00:07,886 INFO L78 Accepts]: Start accepts. Automaton has 9340 states and 32443 transitions. Word has length 15 [2022-11-03 04:00:07,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:00:07,886 INFO L495 AbstractCegarLoop]: Abstraction has 9340 states and 32443 transitions. [2022-11-03 04:00:07,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:07,886 INFO L276 IsEmpty]: Start isEmpty. Operand 9340 states and 32443 transitions. [2022-11-03 04:00:07,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-03 04:00:07,889 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:00:07,889 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:00:07,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-03 04:00:07,889 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting qrcu_updaterErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [qrcu_reader1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2022-11-03 04:00:07,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:00:07,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1810914028, now seen corresponding path program 2 times [2022-11-03 04:00:07,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:00:07,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737478952] [2022-11-03 04:00:07,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:07,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:00:07,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:08,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:00:08,062 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:00:08,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737478952] [2022-11-03 04:00:08,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737478952] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:00:08,063 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:00:08,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:00:08,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474107106] [2022-11-03 04:00:08,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:00:08,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 04:00:08,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:00:08,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 04:00:08,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:00:08,064 INFO L87 Difference]: Start difference. First operand 9340 states and 32443 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:08,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:00:08,529 INFO L93 Difference]: Finished difference Result 10092 states and 34509 transitions. [2022-11-03 04:00:08,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 04:00:08,529 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-03 04:00:08,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:00:08,554 INFO L225 Difference]: With dead ends: 10092 [2022-11-03 04:00:08,554 INFO L226 Difference]: Without dead ends: 10092 [2022-11-03 04:00:08,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:00:08,555 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 134 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 04:00:08,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 66 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 04:00:08,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10092 states. [2022-11-03 04:00:08,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10092 to 9268. [2022-11-03 04:00:08,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9268 states, 9143 states have (on average 3.5168981734660396) internal successors, (32155), 9267 states have internal predecessors, (32155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:08,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9268 states to 9268 states and 32155 transitions. [2022-11-03 04:00:08,734 INFO L78 Accepts]: Start accepts. Automaton has 9268 states and 32155 transitions. Word has length 15 [2022-11-03 04:00:08,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:00:08,734 INFO L495 AbstractCegarLoop]: Abstraction has 9268 states and 32155 transitions. [2022-11-03 04:00:08,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:08,734 INFO L276 IsEmpty]: Start isEmpty. Operand 9268 states and 32155 transitions. [2022-11-03 04:00:08,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-03 04:00:08,737 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:00:08,737 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:00:08,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-03 04:00:08,737 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting qrcu_updaterErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [qrcu_reader1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2022-11-03 04:00:08,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:00:08,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1810879713, now seen corresponding path program 2 times [2022-11-03 04:00:08,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:00:08,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035626109] [2022-11-03 04:00:08,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:08,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:00:08,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:08,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:00:08,880 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:00:08,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035626109] [2022-11-03 04:00:08,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035626109] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:00:08,880 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:00:08,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:00:08,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517189707] [2022-11-03 04:00:08,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:00:08,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 04:00:08,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:00:08,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 04:00:08,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:00:08,882 INFO L87 Difference]: Start difference. First operand 9268 states and 32155 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:09,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:00:09,509 INFO L93 Difference]: Finished difference Result 12094 states and 40630 transitions. [2022-11-03 04:00:09,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 04:00:09,510 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-03 04:00:09,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:00:09,548 INFO L225 Difference]: With dead ends: 12094 [2022-11-03 04:00:09,548 INFO L226 Difference]: Without dead ends: 12094 [2022-11-03 04:00:09,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-03 04:00:09,549 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 294 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 04:00:09,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [294 Valid, 53 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 04:00:09,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12094 states. [2022-11-03 04:00:09,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12094 to 9178. [2022-11-03 04:00:09,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9178 states, 9055 states have (on average 3.5085588072887908) internal successors, (31770), 9177 states have internal predecessors, (31770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:09,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9178 states to 9178 states and 31770 transitions. [2022-11-03 04:00:09,748 INFO L78 Accepts]: Start accepts. Automaton has 9178 states and 31770 transitions. Word has length 15 [2022-11-03 04:00:09,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:00:09,748 INFO L495 AbstractCegarLoop]: Abstraction has 9178 states and 31770 transitions. [2022-11-03 04:00:09,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:09,748 INFO L276 IsEmpty]: Start isEmpty. Operand 9178 states and 31770 transitions. [2022-11-03 04:00:09,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-03 04:00:09,750 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:00:09,750 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:00:09,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-03 04:00:09,751 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting qrcu_updaterErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [qrcu_reader1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2022-11-03 04:00:09,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:00:09,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1810880548, now seen corresponding path program 3 times [2022-11-03 04:00:09,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:00:09,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956567715] [2022-11-03 04:00:09,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:09,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:00:09,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:09,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:00:09,917 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:00:09,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956567715] [2022-11-03 04:00:09,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956567715] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:00:09,918 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:00:09,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:00:09,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853173496] [2022-11-03 04:00:09,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:00:09,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 04:00:09,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:00:09,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 04:00:09,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:00:09,920 INFO L87 Difference]: Start difference. First operand 9178 states and 31770 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:10,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:00:10,472 INFO L93 Difference]: Finished difference Result 10120 states and 34423 transitions. [2022-11-03 04:00:10,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 04:00:10,472 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-03 04:00:10,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:00:10,504 INFO L225 Difference]: With dead ends: 10120 [2022-11-03 04:00:10,505 INFO L226 Difference]: Without dead ends: 10120 [2022-11-03 04:00:10,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-03 04:00:10,505 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 234 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 04:00:10,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 57 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 04:00:10,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10120 states. [2022-11-03 04:00:10,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10120 to 9018. [2022-11-03 04:00:10,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9018 states, 8897 states have (on average 3.512644711700573) internal successors, (31252), 9017 states have internal predecessors, (31252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:10,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9018 states to 9018 states and 31252 transitions. [2022-11-03 04:00:10,763 INFO L78 Accepts]: Start accepts. Automaton has 9018 states and 31252 transitions. Word has length 15 [2022-11-03 04:00:10,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:00:10,763 INFO L495 AbstractCegarLoop]: Abstraction has 9018 states and 31252 transitions. [2022-11-03 04:00:10,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:10,764 INFO L276 IsEmpty]: Start isEmpty. Operand 9018 states and 31252 transitions. [2022-11-03 04:00:10,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-03 04:00:10,767 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:00:10,767 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:00:10,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-03 04:00:10,768 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting qrcu_updaterErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [qrcu_reader1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2022-11-03 04:00:10,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:00:10,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1589457396, now seen corresponding path program 1 times [2022-11-03 04:00:10,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:00:10,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061571182] [2022-11-03 04:00:10,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:10,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:00:10,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:10,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:00:10,976 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:00:10,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061571182] [2022-11-03 04:00:10,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061571182] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:00:10,977 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:00:10,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:00:10,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868367645] [2022-11-03 04:00:10,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:00:10,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 04:00:10,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:00:10,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 04:00:10,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:00:10,979 INFO L87 Difference]: Start difference. First operand 9018 states and 31252 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:11,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:00:11,425 INFO L93 Difference]: Finished difference Result 9872 states and 33506 transitions. [2022-11-03 04:00:11,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:00:11,426 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-03 04:00:11,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:00:11,464 INFO L225 Difference]: With dead ends: 9872 [2022-11-03 04:00:11,464 INFO L226 Difference]: Without dead ends: 9850 [2022-11-03 04:00:11,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:00:11,465 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 117 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 04:00:11,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 51 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 04:00:11,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9850 states. [2022-11-03 04:00:11,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9850 to 9518. [2022-11-03 04:00:11,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9518 states, 9397 states have (on average 3.4764286474406725) internal successors, (32668), 9517 states have internal predecessors, (32668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:11,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9518 states to 9518 states and 32668 transitions. [2022-11-03 04:00:11,712 INFO L78 Accepts]: Start accepts. Automaton has 9518 states and 32668 transitions. Word has length 16 [2022-11-03 04:00:11,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:00:11,713 INFO L495 AbstractCegarLoop]: Abstraction has 9518 states and 32668 transitions. [2022-11-03 04:00:11,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:11,713 INFO L276 IsEmpty]: Start isEmpty. Operand 9518 states and 32668 transitions. [2022-11-03 04:00:11,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-03 04:00:11,718 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:00:11,718 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:00:11,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-03 04:00:11,718 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting qrcu_updaterErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [qrcu_reader1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2022-11-03 04:00:11,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:00:11,719 INFO L85 PathProgramCache]: Analyzing trace with hash 275005297, now seen corresponding path program 1 times [2022-11-03 04:00:11,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:00:11,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024260529] [2022-11-03 04:00:11,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:11,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:00:11,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:11,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:00:11,861 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:00:11,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024260529] [2022-11-03 04:00:11,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024260529] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:00:11,862 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:00:11,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:00:11,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433109777] [2022-11-03 04:00:11,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:00:11,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 04:00:11,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:00:11,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 04:00:11,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:00:11,864 INFO L87 Difference]: Start difference. First operand 9518 states and 32668 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:12,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:00:12,461 INFO L93 Difference]: Finished difference Result 10050 states and 34311 transitions. [2022-11-03 04:00:12,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 04:00:12,462 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-03 04:00:12,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:00:12,503 INFO L225 Difference]: With dead ends: 10050 [2022-11-03 04:00:12,503 INFO L226 Difference]: Without dead ends: 10002 [2022-11-03 04:00:12,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-11-03 04:00:12,505 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 185 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 04:00:12,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 92 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 04:00:12,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10002 states. [2022-11-03 04:00:12,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10002 to 9204. [2022-11-03 04:00:12,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9204 states, 9102 states have (on average 3.491650186772138) internal successors, (31781), 9203 states have internal predecessors, (31781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:12,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9204 states to 9204 states and 31781 transitions. [2022-11-03 04:00:12,758 INFO L78 Accepts]: Start accepts. Automaton has 9204 states and 31781 transitions. Word has length 16 [2022-11-03 04:00:12,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:00:12,758 INFO L495 AbstractCegarLoop]: Abstraction has 9204 states and 31781 transitions. [2022-11-03 04:00:12,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:12,758 INFO L276 IsEmpty]: Start isEmpty. Operand 9204 states and 31781 transitions. [2022-11-03 04:00:12,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-03 04:00:12,764 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:00:12,765 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:00:12,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-03 04:00:12,765 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting qrcu_updaterErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [qrcu_reader1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2022-11-03 04:00:12,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:00:12,766 INFO L85 PathProgramCache]: Analyzing trace with hash 292741506, now seen corresponding path program 2 times [2022-11-03 04:00:12,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:00:12,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223444617] [2022-11-03 04:00:12,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:12,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:00:12,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:12,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:00:12,940 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:00:12,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223444617] [2022-11-03 04:00:12,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223444617] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:00:12,941 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:00:12,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:00:12,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720372413] [2022-11-03 04:00:12,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:00:12,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 04:00:12,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:00:12,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 04:00:12,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:00:12,948 INFO L87 Difference]: Start difference. First operand 9204 states and 31781 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:13,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:00:13,555 INFO L93 Difference]: Finished difference Result 12078 states and 40714 transitions. [2022-11-03 04:00:13,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 04:00:13,555 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-03 04:00:13,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:00:13,590 INFO L225 Difference]: With dead ends: 12078 [2022-11-03 04:00:13,590 INFO L226 Difference]: Without dead ends: 12078 [2022-11-03 04:00:13,590 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-11-03 04:00:13,591 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 226 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 04:00:13,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 61 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 04:00:13,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12078 states. [2022-11-03 04:00:13,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12078 to 9430. [2022-11-03 04:00:13,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9430 states, 9328 states have (on average 3.5086835334476842) internal successors, (32729), 9429 states have internal predecessors, (32729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:13,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9430 states to 9430 states and 32729 transitions. [2022-11-03 04:00:13,868 INFO L78 Accepts]: Start accepts. Automaton has 9430 states and 32729 transitions. Word has length 16 [2022-11-03 04:00:13,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:00:13,868 INFO L495 AbstractCegarLoop]: Abstraction has 9430 states and 32729 transitions. [2022-11-03 04:00:13,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:13,869 INFO L276 IsEmpty]: Start isEmpty. Operand 9430 states and 32729 transitions. [2022-11-03 04:00:13,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-03 04:00:13,875 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:00:13,875 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:00:13,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-03 04:00:13,876 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting qrcu_updaterErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [qrcu_reader1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2022-11-03 04:00:13,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:00:13,876 INFO L85 PathProgramCache]: Analyzing trace with hash -337488052, now seen corresponding path program 3 times [2022-11-03 04:00:13,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:00:13,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555141996] [2022-11-03 04:00:13,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:13,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:00:13,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:14,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:00:14,162 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:00:14,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555141996] [2022-11-03 04:00:14,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555141996] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:00:14,163 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:00:14,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:00:14,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047285662] [2022-11-03 04:00:14,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:00:14,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:00:14,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:00:14,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:00:14,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:00:14,165 INFO L87 Difference]: Start difference. First operand 9430 states and 32729 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:15,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:00:15,015 INFO L93 Difference]: Finished difference Result 14602 states and 50890 transitions. [2022-11-03 04:00:15,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 04:00:15,015 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-03 04:00:15,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:00:15,060 INFO L225 Difference]: With dead ends: 14602 [2022-11-03 04:00:15,060 INFO L226 Difference]: Without dead ends: 14602 [2022-11-03 04:00:15,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2022-11-03 04:00:15,061 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 306 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 788 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 04:00:15,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [306 Valid, 80 Invalid, 854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 788 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 04:00:15,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14602 states. [2022-11-03 04:00:15,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14602 to 10612. [2022-11-03 04:00:15,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10612 states, 10512 states have (on average 3.5056126331811264) internal successors, (36851), 10611 states have internal predecessors, (36851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:15,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10612 states to 10612 states and 36851 transitions. [2022-11-03 04:00:15,358 INFO L78 Accepts]: Start accepts. Automaton has 10612 states and 36851 transitions. Word has length 16 [2022-11-03 04:00:15,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:00:15,358 INFO L495 AbstractCegarLoop]: Abstraction has 10612 states and 36851 transitions. [2022-11-03 04:00:15,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:15,359 INFO L276 IsEmpty]: Start isEmpty. Operand 10612 states and 36851 transitions. [2022-11-03 04:00:15,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-03 04:00:15,365 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:00:15,366 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:00:15,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-11-03 04:00:15,366 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting qrcu_updaterErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [qrcu_reader1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2022-11-03 04:00:15,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:00:15,367 INFO L85 PathProgramCache]: Analyzing trace with hash -337513935, now seen corresponding path program 2 times [2022-11-03 04:00:15,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:00:15,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129506776] [2022-11-03 04:00:15,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:15,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:00:15,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:15,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:00:15,597 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:00:15,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129506776] [2022-11-03 04:00:15,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129506776] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:00:15,597 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:00:15,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:00:15,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416937571] [2022-11-03 04:00:15,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:00:15,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 04:00:15,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:00:15,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 04:00:15,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:00:15,599 INFO L87 Difference]: Start difference. First operand 10612 states and 36851 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:16,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:00:16,125 INFO L93 Difference]: Finished difference Result 11400 states and 39504 transitions. [2022-11-03 04:00:16,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 04:00:16,125 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-03 04:00:16,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:00:16,160 INFO L225 Difference]: With dead ends: 11400 [2022-11-03 04:00:16,161 INFO L226 Difference]: Without dead ends: 11400 [2022-11-03 04:00:16,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-03 04:00:16,161 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 216 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 04:00:16,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 46 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 04:00:16,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11400 states. [2022-11-03 04:00:16,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11400 to 10756. [2022-11-03 04:00:16,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10756 states, 10656 states have (on average 3.4950262762762763) internal successors, (37243), 10755 states have internal predecessors, (37243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:16,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10756 states to 10756 states and 37243 transitions. [2022-11-03 04:00:16,429 INFO L78 Accepts]: Start accepts. Automaton has 10756 states and 37243 transitions. Word has length 16 [2022-11-03 04:00:16,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:00:16,429 INFO L495 AbstractCegarLoop]: Abstraction has 10756 states and 37243 transitions. [2022-11-03 04:00:16,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:16,430 INFO L276 IsEmpty]: Start isEmpty. Operand 10756 states and 37243 transitions. [2022-11-03 04:00:16,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-03 04:00:16,434 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:00:16,434 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:00:16,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-03 04:00:16,435 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting qrcu_reader1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [qrcu_reader1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2022-11-03 04:00:16,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:00:16,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1433788855, now seen corresponding path program 1 times [2022-11-03 04:00:16,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:00:16,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463912699] [2022-11-03 04:00:16,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:16,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:00:16,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:16,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:00:16,548 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:00:16,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463912699] [2022-11-03 04:00:16,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463912699] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:00:16,548 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:00:16,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 04:00:16,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497956248] [2022-11-03 04:00:16,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:00:16,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:00:16,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:00:16,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:00:16,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:00:16,550 INFO L87 Difference]: Start difference. First operand 10756 states and 37243 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:16,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:00:16,967 INFO L93 Difference]: Finished difference Result 11436 states and 38870 transitions. [2022-11-03 04:00:16,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:00:16,967 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-03 04:00:16,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:00:17,001 INFO L225 Difference]: With dead ends: 11436 [2022-11-03 04:00:17,001 INFO L226 Difference]: Without dead ends: 11394 [2022-11-03 04:00:17,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:00:17,002 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 166 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 04:00:17,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 116 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 04:00:17,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11394 states. [2022-11-03 04:00:17,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11394 to 10884. [2022-11-03 04:00:17,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10884 states, 10799 states have (on average 3.4940272247430317) internal successors, (37732), 10883 states have internal predecessors, (37732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:17,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10884 states to 10884 states and 37732 transitions. [2022-11-03 04:00:17,307 INFO L78 Accepts]: Start accepts. Automaton has 10884 states and 37732 transitions. Word has length 16 [2022-11-03 04:00:17,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:00:17,307 INFO L495 AbstractCegarLoop]: Abstraction has 10884 states and 37732 transitions. [2022-11-03 04:00:17,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:17,307 INFO L276 IsEmpty]: Start isEmpty. Operand 10884 states and 37732 transitions. [2022-11-03 04:00:17,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-03 04:00:17,314 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:00:17,314 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:00:17,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-03 04:00:17,315 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting qrcu_reader1Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [qrcu_reader1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2022-11-03 04:00:17,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:00:17,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1433788857, now seen corresponding path program 1 times [2022-11-03 04:00:17,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:00:17,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267139420] [2022-11-03 04:00:17,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:17,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:00:17,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:17,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:00:17,379 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:00:17,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267139420] [2022-11-03 04:00:17,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267139420] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:00:17,379 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:00:17,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 04:00:17,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247441702] [2022-11-03 04:00:17,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:00:17,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:00:17,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:00:17,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:00:17,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:00:17,381 INFO L87 Difference]: Start difference. First operand 10884 states and 37732 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:17,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:00:17,690 INFO L93 Difference]: Finished difference Result 12908 states and 45501 transitions. [2022-11-03 04:00:17,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:00:17,691 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-03 04:00:17,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:00:17,738 INFO L225 Difference]: With dead ends: 12908 [2022-11-03 04:00:17,738 INFO L226 Difference]: Without dead ends: 12700 [2022-11-03 04:00:17,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:00:17,739 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 152 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:00:17,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 85 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:00:17,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12700 states. [2022-11-03 04:00:17,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12700 to 11180. [2022-11-03 04:00:17,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11180 states, 11110 states have (on average 3.5557155715571556) internal successors, (39504), 11179 states have internal predecessors, (39504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:18,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11180 states to 11180 states and 39504 transitions. [2022-11-03 04:00:18,035 INFO L78 Accepts]: Start accepts. Automaton has 11180 states and 39504 transitions. Word has length 16 [2022-11-03 04:00:18,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:00:18,036 INFO L495 AbstractCegarLoop]: Abstraction has 11180 states and 39504 transitions. [2022-11-03 04:00:18,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:18,036 INFO L276 IsEmpty]: Start isEmpty. Operand 11180 states and 39504 transitions. [2022-11-03 04:00:18,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-03 04:00:18,041 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:00:18,041 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:00:18,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-11-03 04:00:18,041 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting qrcu_updaterErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [qrcu_reader1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2022-11-03 04:00:18,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:00:18,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1903498141, now seen corresponding path program 3 times [2022-11-03 04:00:18,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:00:18,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948922714] [2022-11-03 04:00:18,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:18,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:00:18,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:18,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:00:18,161 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:00:18,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948922714] [2022-11-03 04:00:18,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948922714] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:00:18,161 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:00:18,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:00:18,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209542199] [2022-11-03 04:00:18,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:00:18,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 04:00:18,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:00:18,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 04:00:18,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:00:18,163 INFO L87 Difference]: Start difference. First operand 11180 states and 39504 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:18,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:00:18,727 INFO L93 Difference]: Finished difference Result 13220 states and 45669 transitions. [2022-11-03 04:00:18,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 04:00:18,727 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-03 04:00:18,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:00:18,761 INFO L225 Difference]: With dead ends: 13220 [2022-11-03 04:00:18,761 INFO L226 Difference]: Without dead ends: 13220 [2022-11-03 04:00:18,762 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2022-11-03 04:00:18,762 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 161 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 04:00:18,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 70 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 04:00:18,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13220 states. [2022-11-03 04:00:18,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13220 to 10436. [2022-11-03 04:00:18,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10436 states, 10368 states have (on average 3.5549768518518516) internal successors, (36858), 10435 states have internal predecessors, (36858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:19,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10436 states to 10436 states and 36858 transitions. [2022-11-03 04:00:19,037 INFO L78 Accepts]: Start accepts. Automaton has 10436 states and 36858 transitions. Word has length 16 [2022-11-03 04:00:19,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:00:19,038 INFO L495 AbstractCegarLoop]: Abstraction has 10436 states and 36858 transitions. [2022-11-03 04:00:19,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:19,038 INFO L276 IsEmpty]: Start isEmpty. Operand 10436 states and 36858 transitions. [2022-11-03 04:00:19,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-03 04:00:19,042 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:00:19,043 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:00:19,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-11-03 04:00:19,043 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting qrcu_updaterErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [qrcu_reader1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2022-11-03 04:00:19,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:00:19,043 INFO L85 PathProgramCache]: Analyzing trace with hash 2132099571, now seen corresponding path program 1 times [2022-11-03 04:00:19,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:00:19,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082826640] [2022-11-03 04:00:19,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:19,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:00:19,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:19,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:00:19,237 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:00:19,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082826640] [2022-11-03 04:00:19,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082826640] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:00:19,238 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:00:19,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:00:19,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589220571] [2022-11-03 04:00:19,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:00:19,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:00:19,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:00:19,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:00:19,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:00:19,240 INFO L87 Difference]: Start difference. First operand 10436 states and 36858 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:19,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:00:19,851 INFO L93 Difference]: Finished difference Result 12040 states and 43269 transitions. [2022-11-03 04:00:19,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 04:00:19,851 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-03 04:00:19,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:00:19,888 INFO L225 Difference]: With dead ends: 12040 [2022-11-03 04:00:19,888 INFO L226 Difference]: Without dead ends: 12040 [2022-11-03 04:00:19,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2022-11-03 04:00:19,889 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 185 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 04:00:19,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 75 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 621 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 04:00:19,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12040 states. [2022-11-03 04:00:20,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12040 to 10790. [2022-11-03 04:00:20,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10790 states, 10722 states have (on average 3.538985263943294) internal successors, (37945), 10789 states have internal predecessors, (37945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:20,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10790 states to 10790 states and 37945 transitions. [2022-11-03 04:00:20,169 INFO L78 Accepts]: Start accepts. Automaton has 10790 states and 37945 transitions. Word has length 16 [2022-11-03 04:00:20,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:00:20,170 INFO L495 AbstractCegarLoop]: Abstraction has 10790 states and 37945 transitions. [2022-11-03 04:00:20,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:20,170 INFO L276 IsEmpty]: Start isEmpty. Operand 10790 states and 37945 transitions. [2022-11-03 04:00:20,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-03 04:00:20,174 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:00:20,175 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:00:20,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-11-03 04:00:20,175 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting qrcu_updaterErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [qrcu_reader1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2022-11-03 04:00:20,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:00:20,176 INFO L85 PathProgramCache]: Analyzing trace with hash 2132333158, now seen corresponding path program 1 times [2022-11-03 04:00:20,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:00:20,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389883245] [2022-11-03 04:00:20,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:20,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:00:20,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:20,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:00:20,300 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:00:20,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389883245] [2022-11-03 04:00:20,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389883245] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:00:20,301 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:00:20,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:00:20,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109652526] [2022-11-03 04:00:20,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:00:20,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 04:00:20,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:00:20,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 04:00:20,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:00:20,303 INFO L87 Difference]: Start difference. First operand 10790 states and 37945 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:20,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:00:20,778 INFO L93 Difference]: Finished difference Result 10988 states and 38459 transitions. [2022-11-03 04:00:20,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 04:00:20,779 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-03 04:00:20,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:00:20,816 INFO L225 Difference]: With dead ends: 10988 [2022-11-03 04:00:20,816 INFO L226 Difference]: Without dead ends: 10988 [2022-11-03 04:00:20,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:00:20,817 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 107 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 04:00:20,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 64 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 04:00:20,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10988 states. [2022-11-03 04:00:21,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10988 to 10430. [2022-11-03 04:00:21,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10430 states, 10362 states have (on average 3.5449720131248794) internal successors, (36733), 10429 states have internal predecessors, (36733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:21,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10430 states to 10430 states and 36733 transitions. [2022-11-03 04:00:21,075 INFO L78 Accepts]: Start accepts. Automaton has 10430 states and 36733 transitions. Word has length 16 [2022-11-03 04:00:21,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:00:21,075 INFO L495 AbstractCegarLoop]: Abstraction has 10430 states and 36733 transitions. [2022-11-03 04:00:21,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:21,075 INFO L276 IsEmpty]: Start isEmpty. Operand 10430 states and 36733 transitions. [2022-11-03 04:00:21,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-03 04:00:21,083 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:00:21,083 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:00:21,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-11-03 04:00:21,084 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting qrcu_reader2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [qrcu_reader1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2022-11-03 04:00:21,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:00:21,084 INFO L85 PathProgramCache]: Analyzing trace with hash -39922990, now seen corresponding path program 1 times [2022-11-03 04:00:21,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:00:21,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545557816] [2022-11-03 04:00:21,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:21,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:00:21,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:21,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:00:21,165 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:00:21,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545557816] [2022-11-03 04:00:21,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545557816] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:00:21,166 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:00:21,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:00:21,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351554468] [2022-11-03 04:00:21,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:00:21,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:00:21,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:00:21,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:00:21,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:00:21,168 INFO L87 Difference]: Start difference. First operand 10430 states and 36733 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:21,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:00:21,502 INFO L93 Difference]: Finished difference Result 10672 states and 35682 transitions. [2022-11-03 04:00:21,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 04:00:21,503 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-03 04:00:21,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:00:21,531 INFO L225 Difference]: With dead ends: 10672 [2022-11-03 04:00:21,531 INFO L226 Difference]: Without dead ends: 10494 [2022-11-03 04:00:21,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:00:21,532 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 74 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:00:21,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 43 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:00:21,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10494 states. [2022-11-03 04:00:21,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10494 to 8536. [2022-11-03 04:00:21,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8536 states, 8483 states have (on average 3.425674879170105) internal successors, (29060), 8535 states have internal predecessors, (29060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:21,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8536 states to 8536 states and 29060 transitions. [2022-11-03 04:00:21,747 INFO L78 Accepts]: Start accepts. Automaton has 8536 states and 29060 transitions. Word has length 17 [2022-11-03 04:00:21,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:00:21,748 INFO L495 AbstractCegarLoop]: Abstraction has 8536 states and 29060 transitions. [2022-11-03 04:00:21,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:21,748 INFO L276 IsEmpty]: Start isEmpty. Operand 8536 states and 29060 transitions. [2022-11-03 04:00:21,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-03 04:00:21,756 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:00:21,756 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:00:21,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-11-03 04:00:21,757 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting qrcu_updaterErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [qrcu_reader1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2022-11-03 04:00:21,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:00:21,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1285452662, now seen corresponding path program 1 times [2022-11-03 04:00:21,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:00:21,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519644794] [2022-11-03 04:00:21,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:21,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:00:21,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:21,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:00:21,967 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:00:21,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519644794] [2022-11-03 04:00:21,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519644794] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:00:21,968 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:00:21,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:00:21,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802109005] [2022-11-03 04:00:21,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:00:21,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 04:00:21,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:00:21,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 04:00:21,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:00:21,970 INFO L87 Difference]: Start difference. First operand 8536 states and 29060 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:22,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:00:22,349 INFO L93 Difference]: Finished difference Result 9248 states and 31218 transitions. [2022-11-03 04:00:22,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:00:22,351 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-03 04:00:22,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:00:22,387 INFO L225 Difference]: With dead ends: 9248 [2022-11-03 04:00:22,387 INFO L226 Difference]: Without dead ends: 9248 [2022-11-03 04:00:22,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:00:22,388 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 98 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 04:00:22,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 52 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 04:00:22,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9248 states. [2022-11-03 04:00:22,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9248 to 8560. [2022-11-03 04:00:22,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8560 states, 8507 states have (on average 3.423063359586223) internal successors, (29120), 8559 states have internal predecessors, (29120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:22,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8560 states to 8560 states and 29120 transitions. [2022-11-03 04:00:22,598 INFO L78 Accepts]: Start accepts. Automaton has 8560 states and 29120 transitions. Word has length 18 [2022-11-03 04:00:22,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:00:22,598 INFO L495 AbstractCegarLoop]: Abstraction has 8560 states and 29120 transitions. [2022-11-03 04:00:22,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:22,599 INFO L276 IsEmpty]: Start isEmpty. Operand 8560 states and 29120 transitions. [2022-11-03 04:00:22,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-03 04:00:22,604 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:00:22,604 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:00:22,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-11-03 04:00:22,605 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting qrcu_updaterErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [qrcu_reader1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2022-11-03 04:00:22,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:00:22,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1225079126, now seen corresponding path program 2 times [2022-11-03 04:00:22,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:00:22,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5322873] [2022-11-03 04:00:22,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:22,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:00:22,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:22,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:00:22,857 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:00:22,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5322873] [2022-11-03 04:00:22,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5322873] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:00:22,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:00:22,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 04:00:22,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533326304] [2022-11-03 04:00:22,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:00:22,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 04:00:22,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:00:22,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 04:00:22,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:00:22,860 INFO L87 Difference]: Start difference. First operand 8560 states and 29120 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:23,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:00:23,512 INFO L93 Difference]: Finished difference Result 11542 states and 39577 transitions. [2022-11-03 04:00:23,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 04:00:23,513 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-03 04:00:23,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:00:23,559 INFO L225 Difference]: With dead ends: 11542 [2022-11-03 04:00:23,560 INFO L226 Difference]: Without dead ends: 11542 [2022-11-03 04:00:23,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2022-11-03 04:00:23,561 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 245 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 04:00:23,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [245 Valid, 72 Invalid, 657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 04:00:23,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11542 states. [2022-11-03 04:00:23,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11542 to 8794. [2022-11-03 04:00:23,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8794 states, 8741 states have (on average 3.4901041070815695) internal successors, (30507), 8793 states have internal predecessors, (30507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:23,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8794 states to 8794 states and 30507 transitions. [2022-11-03 04:00:23,857 INFO L78 Accepts]: Start accepts. Automaton has 8794 states and 30507 transitions. Word has length 18 [2022-11-03 04:00:23,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:00:23,857 INFO L495 AbstractCegarLoop]: Abstraction has 8794 states and 30507 transitions. [2022-11-03 04:00:23,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:23,857 INFO L276 IsEmpty]: Start isEmpty. Operand 8794 states and 30507 transitions. [2022-11-03 04:00:23,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-03 04:00:23,864 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:00:23,864 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:00:23,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-11-03 04:00:23,864 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting qrcu_updaterErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [qrcu_reader1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2022-11-03 04:00:23,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:00:23,865 INFO L85 PathProgramCache]: Analyzing trace with hash 967514791, now seen corresponding path program 1 times [2022-11-03 04:00:23,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:00:23,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154237980] [2022-11-03 04:00:23,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:23,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:00:23,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:24,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:00:24,097 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:00:24,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154237980] [2022-11-03 04:00:24,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154237980] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:00:24,098 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:00:24,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 04:00:24,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096241092] [2022-11-03 04:00:24,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:00:24,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 04:00:24,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:00:24,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 04:00:24,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:00:24,100 INFO L87 Difference]: Start difference. First operand 8794 states and 30507 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:24,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:00:24,766 INFO L93 Difference]: Finished difference Result 9472 states and 32789 transitions. [2022-11-03 04:00:24,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 04:00:24,767 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-03 04:00:24,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:00:24,804 INFO L225 Difference]: With dead ends: 9472 [2022-11-03 04:00:24,805 INFO L226 Difference]: Without dead ends: 9472 [2022-11-03 04:00:24,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2022-11-03 04:00:24,806 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 180 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 04:00:24,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 75 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 643 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 04:00:24,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9472 states. [2022-11-03 04:00:25,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9472 to 8782. [2022-11-03 04:00:25,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8782 states, 8729 states have (on average 3.491006988200252) internal successors, (30473), 8781 states have internal predecessors, (30473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:25,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8782 states to 8782 states and 30473 transitions. [2022-11-03 04:00:25,100 INFO L78 Accepts]: Start accepts. Automaton has 8782 states and 30473 transitions. Word has length 18 [2022-11-03 04:00:25,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:00:25,101 INFO L495 AbstractCegarLoop]: Abstraction has 8782 states and 30473 transitions. [2022-11-03 04:00:25,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:25,101 INFO L276 IsEmpty]: Start isEmpty. Operand 8782 states and 30473 transitions. [2022-11-03 04:00:25,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-03 04:00:25,110 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:00:25,110 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:00:25,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-11-03 04:00:25,111 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting qrcu_updaterErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [qrcu_reader1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2022-11-03 04:00:25,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:00:25,112 INFO L85 PathProgramCache]: Analyzing trace with hash 967549106, now seen corresponding path program 3 times [2022-11-03 04:00:25,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:00:25,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136547435] [2022-11-03 04:00:25,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:25,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:00:25,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:25,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:00:25,382 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:00:25,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136547435] [2022-11-03 04:00:25,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136547435] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:00:25,383 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:00:25,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 04:00:25,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129501662] [2022-11-03 04:00:25,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:00:25,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 04:00:25,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:00:25,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 04:00:25,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:00:25,386 INFO L87 Difference]: Start difference. First operand 8782 states and 30473 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:26,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:00:26,070 INFO L93 Difference]: Finished difference Result 11550 states and 39549 transitions. [2022-11-03 04:00:26,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 04:00:26,071 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-03 04:00:26,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:00:26,103 INFO L225 Difference]: With dead ends: 11550 [2022-11-03 04:00:26,103 INFO L226 Difference]: Without dead ends: 11550 [2022-11-03 04:00:26,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2022-11-03 04:00:26,104 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 242 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 706 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 04:00:26,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 85 Invalid, 776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 706 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 04:00:26,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11550 states. [2022-11-03 04:00:26,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11550 to 8746. [2022-11-03 04:00:26,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8746 states, 8693 states have (on average 3.494650868514897) internal successors, (30379), 8745 states have internal predecessors, (30379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:26,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8746 states to 8746 states and 30379 transitions. [2022-11-03 04:00:26,344 INFO L78 Accepts]: Start accepts. Automaton has 8746 states and 30379 transitions. Word has length 18 [2022-11-03 04:00:26,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:00:26,344 INFO L495 AbstractCegarLoop]: Abstraction has 8746 states and 30379 transitions. [2022-11-03 04:00:26,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:26,345 INFO L276 IsEmpty]: Start isEmpty. Operand 8746 states and 30379 transitions. [2022-11-03 04:00:26,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-03 04:00:26,351 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:00:26,351 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:00:26,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-11-03 04:00:26,352 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting qrcu_updaterErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [qrcu_reader1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2022-11-03 04:00:26,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:00:26,352 INFO L85 PathProgramCache]: Analyzing trace with hash 97109144, now seen corresponding path program 1 times [2022-11-03 04:00:26,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:00:26,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652911268] [2022-11-03 04:00:26,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:26,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:00:26,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:26,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:00:26,591 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:00:26,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652911268] [2022-11-03 04:00:26,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652911268] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:00:26,591 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:00:26,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:00:26,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852818386] [2022-11-03 04:00:26,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:00:26,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 04:00:26,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:00:26,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 04:00:26,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:00:26,593 INFO L87 Difference]: Start difference. First operand 8746 states and 30379 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:27,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:00:27,117 INFO L93 Difference]: Finished difference Result 10550 states and 35953 transitions. [2022-11-03 04:00:27,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 04:00:27,117 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-03 04:00:27,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:00:27,148 INFO L225 Difference]: With dead ends: 10550 [2022-11-03 04:00:27,148 INFO L226 Difference]: Without dead ends: 10550 [2022-11-03 04:00:27,149 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-03 04:00:27,149 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 176 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 04:00:27,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 57 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 04:00:27,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10550 states. [2022-11-03 04:00:27,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10550 to 8656. [2022-11-03 04:00:27,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8656 states, 8605 states have (on average 3.5027309703660663) internal successors, (30141), 8655 states have internal predecessors, (30141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:27,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8656 states to 8656 states and 30141 transitions. [2022-11-03 04:00:27,381 INFO L78 Accepts]: Start accepts. Automaton has 8656 states and 30141 transitions. Word has length 18 [2022-11-03 04:00:27,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:00:27,381 INFO L495 AbstractCegarLoop]: Abstraction has 8656 states and 30141 transitions. [2022-11-03 04:00:27,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:27,381 INFO L276 IsEmpty]: Start isEmpty. Operand 8656 states and 30141 transitions. [2022-11-03 04:00:27,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-03 04:00:27,390 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:00:27,390 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:00:27,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-11-03 04:00:27,390 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting qrcu_updaterErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [qrcu_reader1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2022-11-03 04:00:27,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:00:27,391 INFO L85 PathProgramCache]: Analyzing trace with hash 97108309, now seen corresponding path program 1 times [2022-11-03 04:00:27,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:00:27,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955256624] [2022-11-03 04:00:27,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:27,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:00:27,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:27,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:00:27,664 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:00:27,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955256624] [2022-11-03 04:00:27,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955256624] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:00:27,664 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:00:27,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:00:27,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067139642] [2022-11-03 04:00:27,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:00:27,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:00:27,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:00:27,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:00:27,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:00:27,669 INFO L87 Difference]: Start difference. First operand 8656 states and 30141 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:28,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:00:28,336 INFO L93 Difference]: Finished difference Result 11926 states and 39537 transitions. [2022-11-03 04:00:28,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 04:00:28,336 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-03 04:00:28,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:00:28,382 INFO L225 Difference]: With dead ends: 11926 [2022-11-03 04:00:28,382 INFO L226 Difference]: Without dead ends: 11926 [2022-11-03 04:00:28,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2022-11-03 04:00:28,383 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 392 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 04:00:28,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [392 Valid, 91 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 04:00:28,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11926 states. [2022-11-03 04:00:28,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11926 to 8468. [2022-11-03 04:00:28,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8468 states, 8417 states have (on average 3.5206130450279196) internal successors, (29633), 8467 states have internal predecessors, (29633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:28,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8468 states to 8468 states and 29633 transitions. [2022-11-03 04:00:28,637 INFO L78 Accepts]: Start accepts. Automaton has 8468 states and 29633 transitions. Word has length 18 [2022-11-03 04:00:28,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:00:28,637 INFO L495 AbstractCegarLoop]: Abstraction has 8468 states and 29633 transitions. [2022-11-03 04:00:28,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:28,637 INFO L276 IsEmpty]: Start isEmpty. Operand 8468 states and 29633 transitions. [2022-11-03 04:00:28,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-03 04:00:28,643 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:00:28,643 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:00:28,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-11-03 04:00:28,644 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting qrcu_updaterErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [qrcu_reader1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2022-11-03 04:00:28,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:00:28,644 INFO L85 PathProgramCache]: Analyzing trace with hash 97160389, now seen corresponding path program 2 times [2022-11-03 04:00:28,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:00:28,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701950187] [2022-11-03 04:00:28,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:28,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:00:28,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:28,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:00:28,904 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:00:28,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701950187] [2022-11-03 04:00:28,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701950187] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:00:28,905 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:00:28,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:00:28,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863438890] [2022-11-03 04:00:28,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:00:28,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:00:28,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:00:28,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:00:28,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:00:28,907 INFO L87 Difference]: Start difference. First operand 8468 states and 29633 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:29,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:00:29,643 INFO L93 Difference]: Finished difference Result 10706 states and 36177 transitions. [2022-11-03 04:00:29,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 04:00:29,644 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-03 04:00:29,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:00:29,685 INFO L225 Difference]: With dead ends: 10706 [2022-11-03 04:00:29,685 INFO L226 Difference]: Without dead ends: 10706 [2022-11-03 04:00:29,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2022-11-03 04:00:29,686 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 340 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 04:00:29,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [340 Valid, 84 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 04:00:29,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10706 states. [2022-11-03 04:00:29,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10706 to 8372. [2022-11-03 04:00:29,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8372 states, 8323 states have (on average 3.529376426769194) internal successors, (29375), 8371 states have internal predecessors, (29375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:29,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8372 states to 8372 states and 29375 transitions. [2022-11-03 04:00:29,994 INFO L78 Accepts]: Start accepts. Automaton has 8372 states and 29375 transitions. Word has length 18 [2022-11-03 04:00:29,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:00:29,994 INFO L495 AbstractCegarLoop]: Abstraction has 8372 states and 29375 transitions. [2022-11-03 04:00:29,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:29,995 INFO L276 IsEmpty]: Start isEmpty. Operand 8372 states and 29375 transitions. [2022-11-03 04:00:30,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-03 04:00:30,005 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:00:30,005 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:00:30,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-11-03 04:00:30,006 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting qrcu_updaterErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [qrcu_reader1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2022-11-03 04:00:30,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:00:30,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1845670384, now seen corresponding path program 1 times [2022-11-03 04:00:30,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:00:30,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484318032] [2022-11-03 04:00:30,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:30,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:00:30,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:30,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:00:30,346 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:00:30,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484318032] [2022-11-03 04:00:30,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484318032] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:00:30,347 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:00:30,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 04:00:30,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402033244] [2022-11-03 04:00:30,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:00:30,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 04:00:30,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:00:30,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 04:00:30,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:00:30,349 INFO L87 Difference]: Start difference. First operand 8372 states and 29375 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)