./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/pthread-atomic/qrcu-1.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_445e89b3-1fa6-4f6b-a34d-a4854b287158/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445e89b3-1fa6-4f6b-a34d-a4854b287158/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_445e89b3-1fa6-4f6b-a34d-a4854b287158/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445e89b3-1fa6-4f6b-a34d-a4854b287158/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread-atomic/qrcu-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445e89b3-1fa6-4f6b-a34d-a4854b287158/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_445e89b3-1fa6-4f6b-a34d-a4854b287158/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 3655f01df3eccc3acdb69c97e41dec3a3ff24ca3333b88921cb12b5b6c342936 --- 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 02:07:04,259 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:07:04,261 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:07:04,291 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:07:04,291 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:07:04,292 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:07:04,294 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:07:04,296 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:07:04,298 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:07:04,299 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:07:04,300 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:07:04,302 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:07:04,302 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:07:04,303 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:07:04,305 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:07:04,306 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:07:04,307 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:07:04,308 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:07:04,310 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:07:04,312 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:07:04,314 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:07:04,316 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:07:04,317 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:07:04,318 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:07:04,322 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:07:04,322 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:07:04,323 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:07:04,324 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:07:04,325 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:07:04,326 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:07:04,326 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:07:04,327 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:07:04,328 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:07:04,329 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:07:04,330 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:07:04,331 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:07:04,332 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:07:04,332 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:07:04,332 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:07:04,334 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:07:04,335 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:07:04,336 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445e89b3-1fa6-4f6b-a34d-a4854b287158/bin/utaipan-7li7fVZpFI/config/svcomp-Overflow-32bit-Taipan_Default.epf [2022-11-03 02:07:04,360 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:07:04,361 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:07:04,361 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:07:04,362 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:07:04,362 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:07:04,363 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:07:04,363 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:07:04,363 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:07:04,364 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:07:04,364 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:07:04,364 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:07:04,364 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:07:04,365 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:07:04,365 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:07:04,365 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:07:04,366 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:07:04,366 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:07:04,366 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:07:04,367 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:07:04,367 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:07:04,367 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-03 02:07:04,368 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:07:04,368 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:07:04,368 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:07:04,369 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:07:04,369 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:07:04,369 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:07:04,369 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-03 02:07:04,370 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:07:04,370 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:07:04,370 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:07:04,370 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:07:04,371 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:07:04,371 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:07:04,371 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:07:04,372 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:07:04,372 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:07:04,372 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:07:04,373 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:07:04,373 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:07:04,373 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:07:04,373 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:07:04,374 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:07:04,374 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_445e89b3-1fa6-4f6b-a34d-a4854b287158/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445e89b3-1fa6-4f6b-a34d-a4854b287158/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3655f01df3eccc3acdb69c97e41dec3a3ff24ca3333b88921cb12b5b6c342936 [2022-11-03 02:07:04,654 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:07:04,682 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:07:04,686 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:07:04,688 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:07:04,689 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:07:04,691 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445e89b3-1fa6-4f6b-a34d-a4854b287158/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/pthread-atomic/qrcu-1.i [2022-11-03 02:07:04,760 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445e89b3-1fa6-4f6b-a34d-a4854b287158/bin/utaipan-7li7fVZpFI/data/f944a0072/9a9af187fcc54e7e8b72a2defb0f91b9/FLAGcf30cf148 [2022-11-03 02:07:05,358 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:07:05,359 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445e89b3-1fa6-4f6b-a34d-a4854b287158/sv-benchmarks/c/pthread-atomic/qrcu-1.i [2022-11-03 02:07:05,379 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445e89b3-1fa6-4f6b-a34d-a4854b287158/bin/utaipan-7li7fVZpFI/data/f944a0072/9a9af187fcc54e7e8b72a2defb0f91b9/FLAGcf30cf148 [2022-11-03 02:07:05,662 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445e89b3-1fa6-4f6b-a34d-a4854b287158/bin/utaipan-7li7fVZpFI/data/f944a0072/9a9af187fcc54e7e8b72a2defb0f91b9 [2022-11-03 02:07:05,666 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:07:05,670 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:07:05,671 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:07:05,671 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:07:05,684 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:07:05,687 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:07:05" (1/1) ... [2022-11-03 02:07:05,688 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a8e4f3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:05, skipping insertion in model container [2022-11-03 02:07:05,688 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:07:05" (1/1) ... [2022-11-03 02:07:05,696 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:07:05,750 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:07:06,226 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_445e89b3-1fa6-4f6b-a34d-a4854b287158/sv-benchmarks/c/pthread-atomic/qrcu-1.i[30694,30707] [2022-11-03 02:07:06,229 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_445e89b3-1fa6-4f6b-a34d-a4854b287158/sv-benchmarks/c/pthread-atomic/qrcu-1.i[30916,30929] [2022-11-03 02:07:06,266 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:07:06,278 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:07:06,346 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_445e89b3-1fa6-4f6b-a34d-a4854b287158/sv-benchmarks/c/pthread-atomic/qrcu-1.i[30694,30707] [2022-11-03 02:07:06,349 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_445e89b3-1fa6-4f6b-a34d-a4854b287158/sv-benchmarks/c/pthread-atomic/qrcu-1.i[30916,30929] [2022-11-03 02:07:06,368 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:07:06,415 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:07:06,416 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:06 WrapperNode [2022-11-03 02:07:06,416 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:07:06,418 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:07:06,419 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:07:06,419 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:07:06,428 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:06" (1/1) ... [2022-11-03 02:07:06,462 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:06" (1/1) ... [2022-11-03 02:07:06,509 INFO L138 Inliner]: procedures = 177, calls = 54, calls flagged for inlining = 15, calls inlined = 17, statements flattened = 302 [2022-11-03 02:07:06,513 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:07:06,513 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:07:06,515 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:07:06,515 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:07:06,524 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:06" (1/1) ... [2022-11-03 02:07:06,524 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:06" (1/1) ... [2022-11-03 02:07:06,543 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:06" (1/1) ... [2022-11-03 02:07:06,547 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:06" (1/1) ... [2022-11-03 02:07:06,554 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:06" (1/1) ... [2022-11-03 02:07:06,559 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:06" (1/1) ... [2022-11-03 02:07:06,562 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:06" (1/1) ... [2022-11-03 02:07:06,564 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:06" (1/1) ... [2022-11-03 02:07:06,568 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:07:06,569 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:07:06,569 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:07:06,570 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:07:06,571 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:06" (1/1) ... [2022-11-03 02:07:06,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:07:06,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445e89b3-1fa6-4f6b-a34d-a4854b287158/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:07:06,630 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445e89b3-1fa6-4f6b-a34d-a4854b287158/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:07:06,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_445e89b3-1fa6-4f6b-a34d-a4854b287158/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:07:06,692 INFO L130 BoogieDeclarations]: Found specification of procedure qrcu_reader1 [2022-11-03 02:07:06,692 INFO L138 BoogieDeclarations]: Found implementation of procedure qrcu_reader1 [2022-11-03 02:07:06,692 INFO L130 BoogieDeclarations]: Found specification of procedure qrcu_reader2 [2022-11-03 02:07:06,693 INFO L138 BoogieDeclarations]: Found implementation of procedure qrcu_reader2 [2022-11-03 02:07:06,693 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 02:07:06,693 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 02:07:06,693 INFO L130 BoogieDeclarations]: Found specification of procedure qrcu_updater [2022-11-03 02:07:06,693 INFO L138 BoogieDeclarations]: Found implementation of procedure qrcu_updater [2022-11-03 02:07:06,694 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-03 02:07:06,694 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:07:06,694 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 02:07:06,695 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 02:07:06,695 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:07:06,695 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:07:06,695 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:07:06,697 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 02:07:06,910 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:07:06,912 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:07:07,472 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:07:07,699 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:07:07,713 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-03 02:07:07,715 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:07:07 BoogieIcfgContainer [2022-11-03 02:07:07,716 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:07:07,718 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:07:07,721 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:07:07,724 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:07:07,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:07:05" (1/3) ... [2022-11-03 02:07:07,726 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b72896e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:07:07, skipping insertion in model container [2022-11-03 02:07:07,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:06" (2/3) ... [2022-11-03 02:07:07,726 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b72896e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:07:07, skipping insertion in model container [2022-11-03 02:07:07,727 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:07:07" (3/3) ... [2022-11-03 02:07:07,728 INFO L112 eAbstractionObserver]: Analyzing ICFG qrcu-1.i [2022-11-03 02:07:07,737 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-03 02:07:07,748 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:07:07,748 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 32 error locations. [2022-11-03 02:07:07,748 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-03 02:07:07,918 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-03 02:07:07,956 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-03 02:07:07,971 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 221 places, 229 transitions, 482 flow [2022-11-03 02:07:07,974 INFO L112 LiptonReduction]: Starting Lipton reduction on Petri net that has 221 places, 229 transitions, 482 flow [2022-11-03 02:07:07,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 221 places, 229 transitions, 482 flow [2022-11-03 02:07:08,087 INFO L130 PetriNetUnfolder]: 18/226 cut-off events. [2022-11-03 02:07:08,088 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-03 02:07:08,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 239 conditions, 226 events. 18/226 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 607 event pairs, 0 based on Foata normal form. 0/176 useless extension candidates. Maximal degree in co-relation 180. Up to 4 conditions per place. [2022-11-03 02:07:08,109 INFO L118 LiptonReduction]: Number of co-enabled transitions 17654 [2022-11-03 02:07:17,564 INFO L133 LiptonReduction]: Checked pairs total: 49073 [2022-11-03 02:07:17,565 INFO L135 LiptonReduction]: Total number of compositions: 189 [2022-11-03 02:07:17,574 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 100 places, 104 transitions, 232 flow [2022-11-03 02:07:18,753 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 25092 states, 23714 states have (on average 4.070928565404403) internal successors, (96538), 25091 states have internal predecessors, (96538), 0 states have call successors, (0), 0 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 02:07:18,779 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:07:18,785 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;@1dc98cee, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:07:18,786 INFO L358 AbstractCegarLoop]: Starting to check reachability of 67 error locations. [2022-11-03 02:07:18,845 INFO L276 IsEmpty]: Start isEmpty. Operand has 25092 states, 23714 states have (on average 4.070928565404403) internal successors, (96538), 25091 states have internal predecessors, (96538), 0 states have call successors, (0), 0 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 02:07:18,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-03 02:07:18,851 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:18,851 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-03 02:07:18,852 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 02:07:18,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:18,860 INFO L85 PathProgramCache]: Analyzing trace with hash 39581186, now seen corresponding path program 1 times [2022-11-03 02:07:18,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:07:18,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64058062] [2022-11-03 02:07:18,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:18,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:07:19,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:19,171 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 02:07:19,172 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:07:19,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64058062] [2022-11-03 02:07:19,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64058062] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:07:19,173 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:07:19,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-03 02:07:19,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110744416] [2022-11-03 02:07:19,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:07:19,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-03 02:07:19,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:07:19,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-03 02:07:19,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 02:07:19,247 INFO L87 Difference]: Start difference. First operand has 25092 states, 23714 states have (on average 4.070928565404403) internal successors, (96538), 25091 states have internal predecessors, (96538), 0 states have call successors, (0), 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 02:07:19,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:19,905 INFO L93 Difference]: Finished difference Result 19388 states and 72458 transitions. [2022-11-03 02:07:19,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-03 02:07:19,919 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 02:07:19,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:20,312 INFO L225 Difference]: With dead ends: 19388 [2022-11-03 02:07:20,312 INFO L226 Difference]: Without dead ends: 19376 [2022-11-03 02:07:20,313 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 02:07:20,318 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:20,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:07:20,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19376 states. [2022-11-03 02:07:21,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19376 to 19376. [2022-11-03 02:07:21,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19376 states, 18544 states have (on average 3.9055220017256254) internal successors, (72424), 19375 states have internal predecessors, (72424), 0 states have call successors, (0), 0 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 02:07:21,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19376 states to 19376 states and 72424 transitions. [2022-11-03 02:07:21,789 INFO L78 Accepts]: Start accepts. Automaton has 19376 states and 72424 transitions. Word has length 4 [2022-11-03 02:07:21,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:21,793 INFO L495 AbstractCegarLoop]: Abstraction has 19376 states and 72424 transitions. [2022-11-03 02:07:21,794 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 02:07:21,794 INFO L276 IsEmpty]: Start isEmpty. Operand 19376 states and 72424 transitions. [2022-11-03 02:07:21,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-03 02:07:21,794 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:21,795 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-03 02:07:21,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:07:21,797 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting qrcu_reader1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [qrcu_reader1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2022-11-03 02:07:21,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:21,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1227016486, now seen corresponding path program 1 times [2022-11-03 02:07:21,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:07:21,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952355879] [2022-11-03 02:07:21,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:21,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:07:22,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:22,194 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 02:07:22,195 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:07:22,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952355879] [2022-11-03 02:07:22,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952355879] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:07:22,196 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:07:22,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-03 02:07:22,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654549729] [2022-11-03 02:07:22,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:07:22,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:07:22,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:07:22,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:07:22,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:07:22,200 INFO L87 Difference]: Start difference. First operand 19376 states and 72424 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 02:07:23,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:23,052 INFO L93 Difference]: Finished difference Result 23520 states and 88236 transitions. [2022-11-03 02:07:23,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:07:23,052 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 02:07:23,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:23,353 INFO L225 Difference]: With dead ends: 23520 [2022-11-03 02:07:23,353 INFO L226 Difference]: Without dead ends: 23520 [2022-11-03 02:07:23,354 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 02:07:23,355 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 58 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:23,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 39 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:07:23,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23520 states. [2022-11-03 02:07:24,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23520 to 23310. [2022-11-03 02:07:24,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23310 states, 22524 states have (on average 3.91133901616054) internal successors, (88099), 23309 states have internal predecessors, (88099), 0 states have call successors, (0), 0 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 02:07:24,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23310 states to 23310 states and 88099 transitions. [2022-11-03 02:07:24,563 INFO L78 Accepts]: Start accepts. Automaton has 23310 states and 88099 transitions. Word has length 5 [2022-11-03 02:07:24,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:24,563 INFO L495 AbstractCegarLoop]: Abstraction has 23310 states and 88099 transitions. [2022-11-03 02:07:24,564 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 02:07:24,564 INFO L276 IsEmpty]: Start isEmpty. Operand 23310 states and 88099 transitions. [2022-11-03 02:07:24,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-03 02:07:24,565 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:24,565 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-03 02:07:24,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 02:07:24,570 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting qrcu_reader1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [qrcu_reader1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2022-11-03 02:07:24,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:24,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1227013318, now seen corresponding path program 1 times [2022-11-03 02:07:24,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:07:24,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948724726] [2022-11-03 02:07:24,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:24,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:07:24,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:24,674 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 02:07:24,674 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:07:24,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948724726] [2022-11-03 02:07:24,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948724726] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:07:24,675 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:07:24,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-03 02:07:24,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049948702] [2022-11-03 02:07:24,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:07:24,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:07:24,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:07:24,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:07:24,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:07:24,677 INFO L87 Difference]: Start difference. First operand 23310 states and 88099 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 02:07:25,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:25,040 INFO L93 Difference]: Finished difference Result 13264 states and 47546 transitions. [2022-11-03 02:07:25,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:07:25,041 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 02:07:25,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:25,139 INFO L225 Difference]: With dead ends: 13264 [2022-11-03 02:07:25,139 INFO L226 Difference]: Without dead ends: 13262 [2022-11-03 02:07:25,140 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 02:07:25,141 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 58 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:25,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 37 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:07:25,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13262 states. [2022-11-03 02:07:25,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13262 to 13246. [2022-11-03 02:07:25,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13246 states, 12794 states have (on average 3.7151008285133655) internal successors, (47531), 13245 states have internal predecessors, (47531), 0 states have call successors, (0), 0 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 02:07:25,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13246 states to 13246 states and 47531 transitions. [2022-11-03 02:07:25,715 INFO L78 Accepts]: Start accepts. Automaton has 13246 states and 47531 transitions. Word has length 5 [2022-11-03 02:07:25,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:25,716 INFO L495 AbstractCegarLoop]: Abstraction has 13246 states and 47531 transitions. [2022-11-03 02:07:25,716 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 02:07:25,716 INFO L276 IsEmpty]: Start isEmpty. Operand 13246 states and 47531 transitions. [2022-11-03 02:07:25,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-03 02:07:25,718 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:25,718 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:07:25,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 02:07:25,718 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 02:07:25,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:25,719 INFO L85 PathProgramCache]: Analyzing trace with hash -417678709, now seen corresponding path program 1 times [2022-11-03 02:07:25,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:07:25,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756368754] [2022-11-03 02:07:25,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:25,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:07:25,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:25,793 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 02:07:25,793 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:07:25,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756368754] [2022-11-03 02:07:25,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756368754] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:07:25,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:07:25,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:07:25,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929748693] [2022-11-03 02:07:25,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:07:25,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:07:25,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:07:25,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:07:25,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:07:25,797 INFO L87 Difference]: Start difference. First operand 13246 states and 47531 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 02:07:26,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:26,238 INFO L93 Difference]: Finished difference Result 14514 states and 49220 transitions. [2022-11-03 02:07:26,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:07:26,239 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 02:07:26,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:26,345 INFO L225 Difference]: With dead ends: 14514 [2022-11-03 02:07:26,346 INFO L226 Difference]: Without dead ends: 14514 [2022-11-03 02:07:26,346 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 02:07:26,349 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 179 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:26,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 62 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:07:26,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14514 states. [2022-11-03 02:07:27,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14514 to 13740. [2022-11-03 02:07:27,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13740 states, 13410 states have (on average 3.6055182699478) internal successors, (48350), 13739 states have internal predecessors, (48350), 0 states have call successors, (0), 0 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 02:07:27,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13740 states to 13740 states and 48350 transitions. [2022-11-03 02:07:27,675 INFO L78 Accepts]: Start accepts. Automaton has 13740 states and 48350 transitions. Word has length 8 [2022-11-03 02:07:27,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:27,676 INFO L495 AbstractCegarLoop]: Abstraction has 13740 states and 48350 transitions. [2022-11-03 02:07:27,676 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 02:07:27,676 INFO L276 IsEmpty]: Start isEmpty. Operand 13740 states and 48350 transitions. [2022-11-03 02:07:27,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-03 02:07:27,678 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:27,679 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:07:27,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 02:07:27,683 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 02:07:27,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:27,684 INFO L85 PathProgramCache]: Analyzing trace with hash -417678708, now seen corresponding path program 1 times [2022-11-03 02:07:27,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:07:27,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804796878] [2022-11-03 02:07:27,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:27,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:07:27,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:27,795 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 02:07:27,802 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:07:27,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804796878] [2022-11-03 02:07:27,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804796878] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:07:27,805 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:07:27,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:07:27,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615884263] [2022-11-03 02:07:27,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:07:27,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:07:27,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:07:27,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:07:27,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:07:27,807 INFO L87 Difference]: Start difference. First operand 13740 states and 48350 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 02:07:28,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:28,355 INFO L93 Difference]: Finished difference Result 14016 states and 48432 transitions. [2022-11-03 02:07:28,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:07:28,356 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 02:07:28,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:28,436 INFO L225 Difference]: With dead ends: 14016 [2022-11-03 02:07:28,437 INFO L226 Difference]: Without dead ends: 14016 [2022-11-03 02:07:28,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:07:28,438 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 132 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:28,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 80 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:07:28,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14016 states. [2022-11-03 02:07:28,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14016 to 13258. [2022-11-03 02:07:28,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13258 states, 13010 states have (on average 3.6100691775557263) internal successors, (46967), 13257 states have internal predecessors, (46967), 0 states have call successors, (0), 0 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 02:07:28,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13258 states to 13258 states and 46967 transitions. [2022-11-03 02:07:28,989 INFO L78 Accepts]: Start accepts. Automaton has 13258 states and 46967 transitions. Word has length 8 [2022-11-03 02:07:28,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:28,990 INFO L495 AbstractCegarLoop]: Abstraction has 13258 states and 46967 transitions. [2022-11-03 02:07:28,990 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 02:07:28,990 INFO L276 IsEmpty]: Start isEmpty. Operand 13258 states and 46967 transitions. [2022-11-03 02:07:28,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-03 02:07:28,992 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:28,992 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:07:28,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 02:07:28,993 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 02:07:28,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:28,994 INFO L85 PathProgramCache]: Analyzing trace with hash -409974195, now seen corresponding path program 1 times [2022-11-03 02:07:28,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:07:28,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385636889] [2022-11-03 02:07:28,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:28,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:07:29,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:29,096 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 02:07:29,097 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:07:29,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385636889] [2022-11-03 02:07:29,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385636889] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:07:29,098 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:07:29,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:07:29,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516836533] [2022-11-03 02:07:29,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:07:29,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:07:29,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:07:29,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:07:29,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:07:29,100 INFO L87 Difference]: Start difference. First operand 13258 states and 46967 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 02:07:29,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:29,631 INFO L93 Difference]: Finished difference Result 13944 states and 49460 transitions. [2022-11-03 02:07:29,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:07:29,632 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 02:07:29,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:29,695 INFO L225 Difference]: With dead ends: 13944 [2022-11-03 02:07:29,695 INFO L226 Difference]: Without dead ends: 13936 [2022-11-03 02:07:29,695 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 02:07:29,696 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 68 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:29,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 35 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:07:29,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13936 states. [2022-11-03 02:07:30,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13936 to 13826. [2022-11-03 02:07:30,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13826 states, 13582 states have (on average 3.6170667059343247) internal successors, (49127), 13825 states have internal predecessors, (49127), 0 states have call successors, (0), 0 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 02:07:30,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13826 states to 13826 states and 49127 transitions. [2022-11-03 02:07:30,403 INFO L78 Accepts]: Start accepts. Automaton has 13826 states and 49127 transitions. Word has length 9 [2022-11-03 02:07:30,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:30,404 INFO L495 AbstractCegarLoop]: Abstraction has 13826 states and 49127 transitions. [2022-11-03 02:07:30,404 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 02:07:30,404 INFO L276 IsEmpty]: Start isEmpty. Operand 13826 states and 49127 transitions. [2022-11-03 02:07:30,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-03 02:07:30,413 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:30,413 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:07:30,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 02:07:30,413 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 02:07:30,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:30,414 INFO L85 PathProgramCache]: Analyzing trace with hash -409969574, now seen corresponding path program 1 times [2022-11-03 02:07:30,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:07:30,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259510630] [2022-11-03 02:07:30,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:30,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:07:30,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:30,524 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 02:07:30,524 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:07:30,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259510630] [2022-11-03 02:07:30,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259510630] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:07:30,525 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:07:30,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:07:30,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129200972] [2022-11-03 02:07:30,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:07:30,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:07:30,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:07:30,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:07:30,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:07:30,527 INFO L87 Difference]: Start difference. First operand 13826 states and 49127 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 02:07:30,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:30,868 INFO L93 Difference]: Finished difference Result 13698 states and 48615 transitions. [2022-11-03 02:07:30,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:07:30,869 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 02:07:30,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:30,915 INFO L225 Difference]: With dead ends: 13698 [2022-11-03 02:07:30,915 INFO L226 Difference]: Without dead ends: 13698 [2022-11-03 02:07:30,916 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 02:07:30,916 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 41 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:30,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 31 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:07:30,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13698 states. [2022-11-03 02:07:31,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13698 to 13698. [2022-11-03 02:07:31,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13698 states, 13458 states have (on average 3.6123495318769505) internal successors, (48615), 13697 states have internal predecessors, (48615), 0 states have call successors, (0), 0 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 02:07:31,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13698 states to 13698 states and 48615 transitions. [2022-11-03 02:07:31,476 INFO L78 Accepts]: Start accepts. Automaton has 13698 states and 48615 transitions. Word has length 9 [2022-11-03 02:07:31,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:31,477 INFO L495 AbstractCegarLoop]: Abstraction has 13698 states and 48615 transitions. [2022-11-03 02:07:31,477 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 02:07:31,477 INFO L276 IsEmpty]: Start isEmpty. Operand 13698 states and 48615 transitions. [2022-11-03 02:07:31,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-03 02:07:31,480 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:31,481 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:07:31,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-03 02:07:31,481 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting qrcu_updaterErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [qrcu_reader1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2022-11-03 02:07:31,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:31,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1626876344, now seen corresponding path program 1 times [2022-11-03 02:07:31,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:07:31,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985415126] [2022-11-03 02:07:31,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:31,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:07:31,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:31,601 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 02:07:31,601 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:07:31,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985415126] [2022-11-03 02:07:31,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985415126] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:07:31,602 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:07:31,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:07:31,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303423016] [2022-11-03 02:07:31,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:07:31,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:07:31,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:07:31,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:07:31,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:07:31,603 INFO L87 Difference]: Start difference. First operand 13698 states and 48615 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 02:07:32,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:32,166 INFO L93 Difference]: Finished difference Result 15048 states and 53628 transitions. [2022-11-03 02:07:32,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:07:32,167 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 02:07:32,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:32,236 INFO L225 Difference]: With dead ends: 15048 [2022-11-03 02:07:32,236 INFO L226 Difference]: Without dead ends: 15048 [2022-11-03 02:07:32,237 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 02:07:32,237 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 162 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:32,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 45 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:07:32,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15048 states. [2022-11-03 02:07:32,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15048 to 13570. [2022-11-03 02:07:32,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13570 states, 13330 states have (on average 3.609827456864216) internal successors, (48119), 13569 states have internal predecessors, (48119), 0 states have call successors, (0), 0 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 02:07:32,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13570 states to 13570 states and 48119 transitions. [2022-11-03 02:07:32,915 INFO L78 Accepts]: Start accepts. Automaton has 13570 states and 48119 transitions. Word has length 12 [2022-11-03 02:07:32,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:32,915 INFO L495 AbstractCegarLoop]: Abstraction has 13570 states and 48119 transitions. [2022-11-03 02:07:32,915 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 02:07:32,915 INFO L276 IsEmpty]: Start isEmpty. Operand 13570 states and 48119 transitions. [2022-11-03 02:07:32,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-03 02:07:32,917 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:32,917 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:07:32,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 02:07:32,918 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting qrcu_reader2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [qrcu_reader1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2022-11-03 02:07:32,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:32,918 INFO L85 PathProgramCache]: Analyzing trace with hash 492220301, now seen corresponding path program 1 times [2022-11-03 02:07:32,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:07:32,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641700648] [2022-11-03 02:07:32,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:32,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:07:32,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:33,061 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 02:07:33,062 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:07:33,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641700648] [2022-11-03 02:07:33,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641700648] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:07:33,062 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:07:33,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:07:33,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195432641] [2022-11-03 02:07:33,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:07:33,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:07:33,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:07:33,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:07:33,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:07:33,064 INFO L87 Difference]: Start difference. First operand 13570 states and 48119 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 02:07:33,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:33,496 INFO L93 Difference]: Finished difference Result 11340 states and 40993 transitions. [2022-11-03 02:07:33,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:07:33,496 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 02:07:33,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:33,556 INFO L225 Difference]: With dead ends: 11340 [2022-11-03 02:07:33,556 INFO L226 Difference]: Without dead ends: 11322 [2022-11-03 02:07:33,557 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:07:33,558 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 100 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:33,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 80 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:07:33,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11322 states. [2022-11-03 02:07:34,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11322 to 10944. [2022-11-03 02:07:34,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10944 states, 10753 states have (on average 3.608667348646889) internal successors, (38804), 10943 states have internal predecessors, (38804), 0 states have call successors, (0), 0 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 02:07:34,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10944 states to 10944 states and 38804 transitions. [2022-11-03 02:07:34,180 INFO L78 Accepts]: Start accepts. Automaton has 10944 states and 38804 transitions. Word has length 13 [2022-11-03 02:07:34,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:34,180 INFO L495 AbstractCegarLoop]: Abstraction has 10944 states and 38804 transitions. [2022-11-03 02:07:34,181 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 02:07:34,181 INFO L276 IsEmpty]: Start isEmpty. Operand 10944 states and 38804 transitions. [2022-11-03 02:07:34,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-03 02:07:34,182 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:34,182 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:07:34,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-03 02:07:34,183 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting qrcu_reader1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [qrcu_reader1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2022-11-03 02:07:34,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:34,183 INFO L85 PathProgramCache]: Analyzing trace with hash 483098580, now seen corresponding path program 1 times [2022-11-03 02:07:34,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:07:34,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569483504] [2022-11-03 02:07:34,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:34,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:07:34,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:34,250 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 02:07:34,251 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:07:34,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569483504] [2022-11-03 02:07:34,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569483504] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:07:34,251 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:07:34,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:07:34,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539629999] [2022-11-03 02:07:34,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:07:34,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:07:34,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:07:34,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:07:34,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:07:34,253 INFO L87 Difference]: Start difference. First operand 10944 states and 38804 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 02:07:34,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:34,672 INFO L93 Difference]: Finished difference Result 10570 states and 36658 transitions. [2022-11-03 02:07:34,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:07:34,673 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 02:07:34,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:34,710 INFO L225 Difference]: With dead ends: 10570 [2022-11-03 02:07:34,710 INFO L226 Difference]: Without dead ends: 10546 [2022-11-03 02:07:34,711 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 02:07:34,711 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 193 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:34,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 75 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:07:34,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10546 states. [2022-11-03 02:07:34,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10546 to 9160. [2022-11-03 02:07:34,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9160 states, 9022 states have (on average 3.610729328308579) internal successors, (32576), 9159 states have internal predecessors, (32576), 0 states have call successors, (0), 0 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 02:07:34,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9160 states to 9160 states and 32576 transitions. [2022-11-03 02:07:34,966 INFO L78 Accepts]: Start accepts. Automaton has 9160 states and 32576 transitions. Word has length 13 [2022-11-03 02:07:34,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:34,966 INFO L495 AbstractCegarLoop]: Abstraction has 9160 states and 32576 transitions. [2022-11-03 02:07:34,966 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 02:07:34,966 INFO L276 IsEmpty]: Start isEmpty. Operand 9160 states and 32576 transitions. [2022-11-03 02:07:34,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-03 02:07:34,968 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:34,968 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:07:34,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-03 02:07:34,968 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting qrcu_updaterErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [qrcu_reader1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2022-11-03 02:07:34,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:34,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1106441902, now seen corresponding path program 1 times [2022-11-03 02:07:34,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:07:34,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982016528] [2022-11-03 02:07:34,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:34,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:07:34,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:35,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:07:35,067 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:07:35,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982016528] [2022-11-03 02:07:35,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982016528] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:07:35,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:07:35,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:07:35,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89963870] [2022-11-03 02:07:35,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:07:35,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:07:35,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:07:35,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:07:35,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:07:35,069 INFO L87 Difference]: Start difference. First operand 9160 states and 32576 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 02:07:35,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:35,727 INFO L93 Difference]: Finished difference Result 9192 states and 32704 transitions. [2022-11-03 02:07:35,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:07:35,728 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 02:07:35,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:35,755 INFO L225 Difference]: With dead ends: 9192 [2022-11-03 02:07:35,755 INFO L226 Difference]: Without dead ends: 9192 [2022-11-03 02:07:35,755 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 02:07:35,756 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 108 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:35,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 43 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:07:35,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9192 states. [2022-11-03 02:07:35,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9192 to 9178. [2022-11-03 02:07:35,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9178 states, 9040 states have (on average 3.6136061946902656) internal successors, (32667), 9177 states have internal predecessors, (32667), 0 states have call successors, (0), 0 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 02:07:35,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9178 states to 9178 states and 32667 transitions. [2022-11-03 02:07:35,936 INFO L78 Accepts]: Start accepts. Automaton has 9178 states and 32667 transitions. Word has length 13 [2022-11-03 02:07:35,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:35,937 INFO L495 AbstractCegarLoop]: Abstraction has 9178 states and 32667 transitions. [2022-11-03 02:07:35,937 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 02:07:35,937 INFO L276 IsEmpty]: Start isEmpty. Operand 9178 states and 32667 transitions. [2022-11-03 02:07:35,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-03 02:07:35,938 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:35,938 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:07:35,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-03 02:07:35,939 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting qrcu_updaterErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [qrcu_reader1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2022-11-03 02:07:35,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:35,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1106585155, now seen corresponding path program 1 times [2022-11-03 02:07:35,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:07:35,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253987896] [2022-11-03 02:07:35,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:35,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:07:35,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:36,050 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 02:07:36,050 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:07:36,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253987896] [2022-11-03 02:07:36,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253987896] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:07:36,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:07:36,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:07:36,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533739301] [2022-11-03 02:07:36,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:07:36,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:07:36,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:07:36,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:07:36,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:07:36,052 INFO L87 Difference]: Start difference. First operand 9178 states and 32667 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 02:07:36,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:36,475 INFO L93 Difference]: Finished difference Result 9610 states and 34251 transitions. [2022-11-03 02:07:36,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:07:36,476 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 02:07:36,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:36,546 INFO L225 Difference]: With dead ends: 9610 [2022-11-03 02:07:36,547 INFO L226 Difference]: Without dead ends: 9610 [2022-11-03 02:07:36,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:07:36,548 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 95 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:36,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 45 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:07:36,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9610 states. [2022-11-03 02:07:36,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9610 to 9442. [2022-11-03 02:07:36,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9442 states, 9304 states have (on average 3.6194110060189164) internal successors, (33675), 9441 states have internal predecessors, (33675), 0 states have call successors, (0), 0 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 02:07:36,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9442 states to 9442 states and 33675 transitions. [2022-11-03 02:07:36,991 INFO L78 Accepts]: Start accepts. Automaton has 9442 states and 33675 transitions. Word has length 13 [2022-11-03 02:07:36,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:36,991 INFO L495 AbstractCegarLoop]: Abstraction has 9442 states and 33675 transitions. [2022-11-03 02:07:36,992 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 02:07:36,992 INFO L276 IsEmpty]: Start isEmpty. Operand 9442 states and 33675 transitions. [2022-11-03 02:07:36,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-03 02:07:36,994 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:36,995 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:07:36,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-03 02:07:36,995 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 02:07:37,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:37,020 INFO L85 PathProgramCache]: Analyzing trace with hash 826041641, now seen corresponding path program 2 times [2022-11-03 02:07:37,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:07:37,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406828611] [2022-11-03 02:07:37,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:37,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:07:37,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:37,115 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 02:07:37,115 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:07:37,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406828611] [2022-11-03 02:07:37,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406828611] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:07:37,116 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:07:37,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:07:37,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318402775] [2022-11-03 02:07:37,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:07:37,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:07:37,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:07:37,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:07:37,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:07:37,117 INFO L87 Difference]: Start difference. First operand 9442 states and 33675 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 02:07:37,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:37,530 INFO L93 Difference]: Finished difference Result 9478 states and 33765 transitions. [2022-11-03 02:07:37,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:07:37,531 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 02:07:37,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:37,570 INFO L225 Difference]: With dead ends: 9478 [2022-11-03 02:07:37,570 INFO L226 Difference]: Without dead ends: 9478 [2022-11-03 02:07:37,571 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:07:37,572 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 56 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:37,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 50 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:07:37,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9478 states. [2022-11-03 02:07:37,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9478 to 9046. [2022-11-03 02:07:37,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9046 states, 8908 states have (on average 3.6125954198473282) internal successors, (32181), 9045 states have internal predecessors, (32181), 0 states have call successors, (0), 0 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 02:07:37,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9046 states to 9046 states and 32181 transitions. [2022-11-03 02:07:37,801 INFO L78 Accepts]: Start accepts. Automaton has 9046 states and 32181 transitions. Word has length 13 [2022-11-03 02:07:37,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:37,801 INFO L495 AbstractCegarLoop]: Abstraction has 9046 states and 32181 transitions. [2022-11-03 02:07:37,801 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 02:07:37,801 INFO L276 IsEmpty]: Start isEmpty. Operand 9046 states and 32181 transitions. [2022-11-03 02:07:37,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-03 02:07:37,804 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:37,804 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:07:37,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-03 02:07:37,805 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 02:07:37,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:37,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1807508954, now seen corresponding path program 1 times [2022-11-03 02:07:37,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:07:37,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226427743] [2022-11-03 02:07:37,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:37,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:07:37,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:37,963 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 02:07:37,963 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:07:37,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226427743] [2022-11-03 02:07:37,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226427743] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:07:37,964 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:07:37,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:07:37,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111731069] [2022-11-03 02:07:37,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:07:37,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:07:37,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:07:37,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:07:37,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:07:37,967 INFO L87 Difference]: Start difference. First operand 9046 states and 32181 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 02:07:38,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:38,241 INFO L93 Difference]: Finished difference Result 8672 states and 30982 transitions. [2022-11-03 02:07:38,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:07:38,241 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 02:07:38,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:38,274 INFO L225 Difference]: With dead ends: 8672 [2022-11-03 02:07:38,275 INFO L226 Difference]: Without dead ends: 8646 [2022-11-03 02:07:38,275 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 02:07:38,276 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 135 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:38,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 54 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:07:38,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8646 states. [2022-11-03 02:07:38,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8646 to 8628. [2022-11-03 02:07:38,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8628 states, 8528 states have (on average 3.6171435272045027) internal successors, (30847), 8627 states have internal predecessors, (30847), 0 states have call successors, (0), 0 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 02:07:38,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8628 states to 8628 states and 30847 transitions. [2022-11-03 02:07:38,765 INFO L78 Accepts]: Start accepts. Automaton has 8628 states and 30847 transitions. Word has length 13 [2022-11-03 02:07:38,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:38,766 INFO L495 AbstractCegarLoop]: Abstraction has 8628 states and 30847 transitions. [2022-11-03 02:07:38,766 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 02:07:38,766 INFO L276 IsEmpty]: Start isEmpty. Operand 8628 states and 30847 transitions. [2022-11-03 02:07:38,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-03 02:07:38,769 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:38,769 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:07:38,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-03 02:07:38,770 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting qrcu_updaterErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [qrcu_reader1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2022-11-03 02:07:38,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:38,770 INFO L85 PathProgramCache]: Analyzing trace with hash -887942189, now seen corresponding path program 1 times [2022-11-03 02:07:38,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:07:38,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769918708] [2022-11-03 02:07:38,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:38,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:07:38,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:38,990 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 02:07:38,990 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:07:38,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769918708] [2022-11-03 02:07:38,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769918708] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:07:38,991 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:07:38,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:07:38,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150107453] [2022-11-03 02:07:38,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:07:38,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:07:38,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:07:38,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:07:38,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:07:38,993 INFO L87 Difference]: Start difference. First operand 8628 states and 30847 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 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 02:07:39,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:39,784 INFO L93 Difference]: Finished difference Result 11138 states and 39992 transitions. [2022-11-03 02:07:39,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 02:07:39,785 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 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 02:07:39,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:39,839 INFO L225 Difference]: With dead ends: 11138 [2022-11-03 02:07:39,840 INFO L226 Difference]: Without dead ends: 11138 [2022-11-03 02:07:39,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:07:39,841 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 226 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:39,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 73 Invalid, 763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 688 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 02:07:39,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11138 states. [2022-11-03 02:07:40,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11138 to 9098. [2022-11-03 02:07:40,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9098 states, 9002 states have (on average 3.617085092201733) internal successors, (32561), 9097 states have internal predecessors, (32561), 0 states have call successors, (0), 0 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 02:07:40,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9098 states to 9098 states and 32561 transitions. [2022-11-03 02:07:40,196 INFO L78 Accepts]: Start accepts. Automaton has 9098 states and 32561 transitions. Word has length 15 [2022-11-03 02:07:40,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:40,197 INFO L495 AbstractCegarLoop]: Abstraction has 9098 states and 32561 transitions. [2022-11-03 02:07:40,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 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 02:07:40,197 INFO L276 IsEmpty]: Start isEmpty. Operand 9098 states and 32561 transitions. [2022-11-03 02:07:40,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-03 02:07:40,202 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:40,202 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:07:40,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-03 02:07:40,202 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting qrcu_updaterErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [qrcu_reader1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2022-11-03 02:07:40,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:40,203 INFO L85 PathProgramCache]: Analyzing trace with hash 191963800, now seen corresponding path program 1 times [2022-11-03 02:07:40,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:07:40,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326195311] [2022-11-03 02:07:40,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:40,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:07:40,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:40,337 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 02:07:40,337 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:07:40,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326195311] [2022-11-03 02:07:40,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326195311] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:07:40,338 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:07:40,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:07:40,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46007592] [2022-11-03 02:07:40,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:07:40,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:07:40,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:07:40,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:07:40,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:07:40,340 INFO L87 Difference]: Start difference. First operand 9098 states and 32561 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 02:07:40,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:40,885 INFO L93 Difference]: Finished difference Result 9158 states and 32759 transitions. [2022-11-03 02:07:40,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:07:40,885 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 02:07:40,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:41,019 INFO L225 Difference]: With dead ends: 9158 [2022-11-03 02:07:41,019 INFO L226 Difference]: Without dead ends: 9158 [2022-11-03 02:07:41,020 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 02:07:41,020 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 150 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:41,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 56 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:07:41,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9158 states. [2022-11-03 02:07:41,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9158 to 8990. [2022-11-03 02:07:41,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8990 states, 8894 states have (on average 3.614459185968068) internal successors, (32147), 8989 states have internal predecessors, (32147), 0 states have call successors, (0), 0 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 02:07:41,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8990 states to 8990 states and 32147 transitions. [2022-11-03 02:07:41,181 INFO L78 Accepts]: Start accepts. Automaton has 8990 states and 32147 transitions. Word has length 15 [2022-11-03 02:07:41,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:41,182 INFO L495 AbstractCegarLoop]: Abstraction has 8990 states and 32147 transitions. [2022-11-03 02:07:41,182 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 02:07:41,182 INFO L276 IsEmpty]: Start isEmpty. Operand 8990 states and 32147 transitions. [2022-11-03 02:07:41,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-03 02:07:41,186 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:41,186 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:07:41,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-03 02:07:41,186 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 02:07:41,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:41,187 INFO L85 PathProgramCache]: Analyzing trace with hash -473388724, now seen corresponding path program 1 times [2022-11-03 02:07:41,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:07:41,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791229538] [2022-11-03 02:07:41,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:41,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:07:41,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:41,316 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 02:07:41,316 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:07:41,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791229538] [2022-11-03 02:07:41,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791229538] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:07:41,317 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:07:41,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:07:41,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250352159] [2022-11-03 02:07:41,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:07:41,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:07:41,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:07:41,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:07:41,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:07:41,319 INFO L87 Difference]: Start difference. First operand 8990 states and 32147 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 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 02:07:41,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:41,664 INFO L93 Difference]: Finished difference Result 9886 states and 34579 transitions. [2022-11-03 02:07:41,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:07:41,665 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 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 02:07:41,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:41,697 INFO L225 Difference]: With dead ends: 9886 [2022-11-03 02:07:41,697 INFO L226 Difference]: Without dead ends: 9814 [2022-11-03 02:07:41,697 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 02:07:41,697 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 118 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:41,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 43 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:07:41,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9814 states. [2022-11-03 02:07:41,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9814 to 9198. [2022-11-03 02:07:41,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9198 states, 9102 states have (on average 3.5978905735003295) internal successors, (32748), 9197 states have internal predecessors, (32748), 0 states have call successors, (0), 0 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 02:07:41,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9198 states to 9198 states and 32748 transitions. [2022-11-03 02:07:41,871 INFO L78 Accepts]: Start accepts. Automaton has 9198 states and 32748 transitions. Word has length 15 [2022-11-03 02:07:41,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:41,872 INFO L495 AbstractCegarLoop]: Abstraction has 9198 states and 32748 transitions. [2022-11-03 02:07:41,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 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 02:07:41,872 INFO L276 IsEmpty]: Start isEmpty. Operand 9198 states and 32748 transitions. [2022-11-03 02:07:41,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-03 02:07:41,876 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:41,877 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:07:41,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-03 02:07:41,877 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting qrcu_updaterErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [qrcu_reader1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2022-11-03 02:07:41,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:41,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1601831888, now seen corresponding path program 2 times [2022-11-03 02:07:41,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:07:41,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992607786] [2022-11-03 02:07:41,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:41,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:07:41,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:42,008 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 02:07:42,009 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:07:42,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992607786] [2022-11-03 02:07:42,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992607786] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:07:42,009 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:07:42,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:07:42,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813454681] [2022-11-03 02:07:42,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:07:42,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:07:42,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:07:42,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:07:42,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:07:42,011 INFO L87 Difference]: Start difference. First operand 9198 states and 32748 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 02:07:42,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:42,619 INFO L93 Difference]: Finished difference Result 11280 states and 38795 transitions. [2022-11-03 02:07:42,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:07:42,619 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 02:07:42,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:42,658 INFO L225 Difference]: With dead ends: 11280 [2022-11-03 02:07:42,658 INFO L226 Difference]: Without dead ends: 11280 [2022-11-03 02:07:42,658 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 02:07:42,659 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 237 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:42,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 46 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:07:42,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11280 states. [2022-11-03 02:07:42,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11280 to 9510. [2022-11-03 02:07:42,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9510 states, 9414 states have (on average 3.608136817505842) internal successors, (33967), 9509 states have internal predecessors, (33967), 0 states have call successors, (0), 0 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 02:07:42,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9510 states to 9510 states and 33967 transitions. [2022-11-03 02:07:42,841 INFO L78 Accepts]: Start accepts. Automaton has 9510 states and 33967 transitions. Word has length 15 [2022-11-03 02:07:42,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:42,842 INFO L495 AbstractCegarLoop]: Abstraction has 9510 states and 33967 transitions. [2022-11-03 02:07:42,842 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 02:07:42,842 INFO L276 IsEmpty]: Start isEmpty. Operand 9510 states and 33967 transitions. [2022-11-03 02:07:42,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-03 02:07:42,846 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:42,847 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:07:42,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-03 02:07:42,847 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 02:07:42,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:42,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1732678238, now seen corresponding path program 3 times [2022-11-03 02:07:42,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:07:42,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723557437] [2022-11-03 02:07:42,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:42,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:07:42,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:43,015 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 02:07:43,015 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:07:43,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723557437] [2022-11-03 02:07:43,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723557437] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:07:43,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:07:43,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:07:43,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063902768] [2022-11-03 02:07:43,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:07:43,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:07:43,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:07:43,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:07:43,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:07:43,017 INFO L87 Difference]: Start difference. First operand 9510 states and 33967 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 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 02:07:43,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:43,739 INFO L93 Difference]: Finished difference Result 10662 states and 38614 transitions. [2022-11-03 02:07:43,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 02:07:43,739 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 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 02:07:43,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:43,768 INFO L225 Difference]: With dead ends: 10662 [2022-11-03 02:07:43,769 INFO L226 Difference]: Without dead ends: 10644 [2022-11-03 02:07:43,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:07:43,770 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 218 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 737 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:43,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 80 Invalid, 811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 737 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 02:07:43,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10644 states. [2022-11-03 02:07:43,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10644 to 9568. [2022-11-03 02:07:43,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9568 states, 9476 states have (on average 3.6025749261291686) internal successors, (34138), 9567 states have internal predecessors, (34138), 0 states have call successors, (0), 0 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 02:07:43,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9568 states to 9568 states and 34138 transitions. [2022-11-03 02:07:43,985 INFO L78 Accepts]: Start accepts. Automaton has 9568 states and 34138 transitions. Word has length 15 [2022-11-03 02:07:43,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:43,985 INFO L495 AbstractCegarLoop]: Abstraction has 9568 states and 34138 transitions. [2022-11-03 02:07:43,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 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 02:07:43,985 INFO L276 IsEmpty]: Start isEmpty. Operand 9568 states and 34138 transitions. [2022-11-03 02:07:43,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-03 02:07:43,989 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:43,989 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:07:43,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-03 02:07:43,989 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting qrcu_updaterErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [qrcu_reader1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2022-11-03 02:07:43,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:43,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1754632349, now seen corresponding path program 1 times [2022-11-03 02:07:43,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:07:43,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484381567] [2022-11-03 02:07:43,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:43,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:07:44,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:44,155 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 02:07:44,155 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:07:44,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484381567] [2022-11-03 02:07:44,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484381567] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:07:44,155 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:07:44,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:07:44,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093814249] [2022-11-03 02:07:44,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:07:44,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:07:44,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:07:44,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:07:44,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:07:44,157 INFO L87 Difference]: Start difference. First operand 9568 states and 34138 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 02:07:44,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:44,708 INFO L93 Difference]: Finished difference Result 10350 states and 36345 transitions. [2022-11-03 02:07:44,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:07:44,708 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 02:07:44,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:44,736 INFO L225 Difference]: With dead ends: 10350 [2022-11-03 02:07:44,737 INFO L226 Difference]: Without dead ends: 10350 [2022-11-03 02:07:44,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:07:44,737 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 195 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:44,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 57 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:07:44,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10350 states. [2022-11-03 02:07:44,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10350 to 9868. [2022-11-03 02:07:44,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9868 states, 9776 states have (on average 3.5797872340425534) internal successors, (34996), 9867 states have internal predecessors, (34996), 0 states have call successors, (0), 0 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 02:07:44,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9868 states to 9868 states and 34996 transitions. [2022-11-03 02:07:44,940 INFO L78 Accepts]: Start accepts. Automaton has 9868 states and 34996 transitions. Word has length 16 [2022-11-03 02:07:44,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:44,940 INFO L495 AbstractCegarLoop]: Abstraction has 9868 states and 34996 transitions. [2022-11-03 02:07:44,940 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 02:07:44,940 INFO L276 IsEmpty]: Start isEmpty. Operand 9868 states and 34996 transitions. [2022-11-03 02:07:44,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-03 02:07:44,943 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:44,943 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:07:44,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-03 02:07:44,944 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 02:07:44,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:44,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1905396509, now seen corresponding path program 2 times [2022-11-03 02:07:44,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:07:44,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073711424] [2022-11-03 02:07:44,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:44,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:07:44,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:45,113 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 02:07:45,113 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:07:45,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073711424] [2022-11-03 02:07:45,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073711424] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:07:45,113 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:07:45,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:07:45,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385285423] [2022-11-03 02:07:45,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:07:45,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:07:45,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:07:45,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:07:45,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:07:45,115 INFO L87 Difference]: Start difference. First operand 9868 states and 34996 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 02:07:45,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:45,763 INFO L93 Difference]: Finished difference Result 10626 states and 37471 transitions. [2022-11-03 02:07:45,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:07:45,763 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 02:07:45,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:45,804 INFO L225 Difference]: With dead ends: 10626 [2022-11-03 02:07:45,804 INFO L226 Difference]: Without dead ends: 10622 [2022-11-03 02:07:45,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:07:45,805 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 220 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:45,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 44 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 555 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:07:45,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10622 states. [2022-11-03 02:07:46,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10622 to 9836. [2022-11-03 02:07:46,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9836 states, 9744 states have (on average 3.575944170771757) internal successors, (34844), 9835 states have internal predecessors, (34844), 0 states have call successors, (0), 0 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 02:07:46,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9836 states to 9836 states and 34844 transitions. [2022-11-03 02:07:46,120 INFO L78 Accepts]: Start accepts. Automaton has 9836 states and 34844 transitions. Word has length 16 [2022-11-03 02:07:46,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:46,121 INFO L495 AbstractCegarLoop]: Abstraction has 9836 states and 34844 transitions. [2022-11-03 02:07:46,121 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 02:07:46,121 INFO L276 IsEmpty]: Start isEmpty. Operand 9836 states and 34844 transitions. [2022-11-03 02:07:46,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-03 02:07:46,126 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:46,126 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:07:46,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-03 02:07:46,126 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 02:07:46,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:46,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1616968136, now seen corresponding path program 1 times [2022-11-03 02:07:46,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:07:46,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407369169] [2022-11-03 02:07:46,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:46,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:07:46,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:46,266 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 02:07:46,267 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:07:46,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407369169] [2022-11-03 02:07:46,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407369169] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:07:46,267 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:07:46,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:07:46,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971520440] [2022-11-03 02:07:46,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:07:46,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:07:46,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:07:46,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:07:46,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:07:46,270 INFO L87 Difference]: Start difference. First operand 9836 states and 34844 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 02:07:46,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:46,818 INFO L93 Difference]: Finished difference Result 10380 states and 36256 transitions. [2022-11-03 02:07:46,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:07:46,818 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 02:07:46,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:46,858 INFO L225 Difference]: With dead ends: 10380 [2022-11-03 02:07:46,858 INFO L226 Difference]: Without dead ends: 10380 [2022-11-03 02:07:46,858 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 02:07:46,859 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 126 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:46,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 63 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 620 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:07:46,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10380 states. [2022-11-03 02:07:47,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10380 to 10152. [2022-11-03 02:07:47,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10152 states, 10060 states have (on average 3.554473161033797) internal successors, (35758), 10151 states have internal predecessors, (35758), 0 states have call successors, (0), 0 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 02:07:47,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10152 states to 10152 states and 35758 transitions. [2022-11-03 02:07:47,080 INFO L78 Accepts]: Start accepts. Automaton has 10152 states and 35758 transitions. Word has length 16 [2022-11-03 02:07:47,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:47,080 INFO L495 AbstractCegarLoop]: Abstraction has 10152 states and 35758 transitions. [2022-11-03 02:07:47,080 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 02:07:47,081 INFO L276 IsEmpty]: Start isEmpty. Operand 10152 states and 35758 transitions. [2022-11-03 02:07:47,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-03 02:07:47,084 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:47,084 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:07:47,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-03 02:07:47,085 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting qrcu_updaterErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [qrcu_reader1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2022-11-03 02:07:47,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:47,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1876653896, now seen corresponding path program 2 times [2022-11-03 02:07:47,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:07:47,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819513229] [2022-11-03 02:07:47,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:47,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:07:47,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:47,284 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 02:07:47,284 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:07:47,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819513229] [2022-11-03 02:07:47,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819513229] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:07:47,285 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:07:47,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:07:47,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337399875] [2022-11-03 02:07:47,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:07:47,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:07:47,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:07:47,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:07:47,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:07:47,286 INFO L87 Difference]: Start difference. First operand 10152 states and 35758 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 02:07:48,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:48,044 INFO L93 Difference]: Finished difference Result 11950 states and 42198 transitions. [2022-11-03 02:07:48,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 02:07:48,044 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 02:07:48,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:48,212 INFO L225 Difference]: With dead ends: 11950 [2022-11-03 02:07:48,213 INFO L226 Difference]: Without dead ends: 11950 [2022-11-03 02:07:48,213 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 02:07:48,214 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 201 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 857 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:48,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 82 Invalid, 892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 857 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 02:07:48,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11950 states. [2022-11-03 02:07:48,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11950 to 10388. [2022-11-03 02:07:48,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10388 states, 10298 states have (on average 3.56146824626141) internal successors, (36676), 10387 states have internal predecessors, (36676), 0 states have call successors, (0), 0 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 02:07:48,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10388 states to 10388 states and 36676 transitions. [2022-11-03 02:07:48,423 INFO L78 Accepts]: Start accepts. Automaton has 10388 states and 36676 transitions. Word has length 16 [2022-11-03 02:07:48,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:48,424 INFO L495 AbstractCegarLoop]: Abstraction has 10388 states and 36676 transitions. [2022-11-03 02:07:48,424 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 02:07:48,424 INFO L276 IsEmpty]: Start isEmpty. Operand 10388 states and 36676 transitions. [2022-11-03 02:07:48,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-03 02:07:48,428 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:48,428 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:07:48,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-03 02:07:48,428 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting qrcu_reader1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [qrcu_reader1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2022-11-03 02:07:48,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:48,429 INFO L85 PathProgramCache]: Analyzing trace with hash -443864724, now seen corresponding path program 1 times [2022-11-03 02:07:48,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:07:48,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966979347] [2022-11-03 02:07:48,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:48,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:07:48,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:48,550 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 02:07:48,552 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:07:48,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966979347] [2022-11-03 02:07:48,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966979347] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:07:48,553 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:07:48,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:07:48,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660266287] [2022-11-03 02:07:48,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:07:48,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:07:48,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:07:48,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:07:48,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:07:48,555 INFO L87 Difference]: Start difference. First operand 10388 states and 36676 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 02:07:48,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:48,973 INFO L93 Difference]: Finished difference Result 11170 states and 39476 transitions. [2022-11-03 02:07:48,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:07:48,974 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 02:07:48,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:49,005 INFO L225 Difference]: With dead ends: 11170 [2022-11-03 02:07:49,006 INFO L226 Difference]: Without dead ends: 10990 [2022-11-03 02:07:49,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:07:49,007 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 164 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:49,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 140 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:07:49,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10990 states. [2022-11-03 02:07:49,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10990 to 9442. [2022-11-03 02:07:49,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9442 states, 9369 states have (on average 3.647027430889102) internal successors, (34169), 9441 states have internal predecessors, (34169), 0 states have call successors, (0), 0 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 02:07:49,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9442 states to 9442 states and 34169 transitions. [2022-11-03 02:07:49,209 INFO L78 Accepts]: Start accepts. Automaton has 9442 states and 34169 transitions. Word has length 16 [2022-11-03 02:07:49,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:49,209 INFO L495 AbstractCegarLoop]: Abstraction has 9442 states and 34169 transitions. [2022-11-03 02:07:49,209 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 02:07:49,209 INFO L276 IsEmpty]: Start isEmpty. Operand 9442 states and 34169 transitions. [2022-11-03 02:07:49,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-03 02:07:49,213 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:49,213 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:07:49,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-11-03 02:07:49,214 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting qrcu_updaterErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [qrcu_reader1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2022-11-03 02:07:49,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:49,214 INFO L85 PathProgramCache]: Analyzing trace with hash -708749641, now seen corresponding path program 3 times [2022-11-03 02:07:49,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:07:49,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677092730] [2022-11-03 02:07:49,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:49,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:07:49,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:49,321 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 02:07:49,322 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:07:49,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677092730] [2022-11-03 02:07:49,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677092730] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:07:49,322 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:07:49,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:07:49,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779345205] [2022-11-03 02:07:49,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:07:49,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:07:49,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:07:49,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:07:49,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:07:49,324 INFO L87 Difference]: Start difference. First operand 9442 states and 34169 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 02:07:49,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:49,761 INFO L93 Difference]: Finished difference Result 9502 states and 34272 transitions. [2022-11-03 02:07:49,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:07:49,762 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 02:07:49,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:49,795 INFO L225 Difference]: With dead ends: 9502 [2022-11-03 02:07:49,796 INFO L226 Difference]: Without dead ends: 9474 [2022-11-03 02:07:49,796 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 02:07:49,801 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 79 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:49,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 51 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:07:49,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9474 states. [2022-11-03 02:07:50,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9474 to 9334. [2022-11-03 02:07:50,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9334 states, 9265 states have (on average 3.6506206152185645) internal successors, (33823), 9333 states have internal predecessors, (33823), 0 states have call successors, (0), 0 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 02:07:50,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9334 states to 9334 states and 33823 transitions. [2022-11-03 02:07:50,060 INFO L78 Accepts]: Start accepts. Automaton has 9334 states and 33823 transitions. Word has length 16 [2022-11-03 02:07:50,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:50,061 INFO L495 AbstractCegarLoop]: Abstraction has 9334 states and 33823 transitions. [2022-11-03 02:07:50,061 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 02:07:50,061 INFO L276 IsEmpty]: Start isEmpty. Operand 9334 states and 33823 transitions. [2022-11-03 02:07:50,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-03 02:07:50,066 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:50,066 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:07:50,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-03 02:07:50,066 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting qrcu_updaterErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [qrcu_reader1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2022-11-03 02:07:50,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:50,067 INFO L85 PathProgramCache]: Analyzing trace with hash 314209483, now seen corresponding path program 1 times [2022-11-03 02:07:50,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:07:50,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455570857] [2022-11-03 02:07:50,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:50,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:07:50,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:50,246 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 02:07:50,247 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:07:50,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455570857] [2022-11-03 02:07:50,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455570857] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:07:50,247 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:07:50,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:07:50,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475852339] [2022-11-03 02:07:50,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:07:50,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:07:50,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:07:50,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:07:50,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:07:50,249 INFO L87 Difference]: Start difference. First operand 9334 states and 33823 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 02:07:50,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:50,922 INFO L93 Difference]: Finished difference Result 10994 states and 39999 transitions. [2022-11-03 02:07:50,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 02:07:50,923 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 02:07:50,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:50,953 INFO L225 Difference]: With dead ends: 10994 [2022-11-03 02:07:50,953 INFO L226 Difference]: Without dead ends: 10994 [2022-11-03 02:07:50,954 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 02:07:50,954 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 173 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 803 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 803 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:50,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 85 Invalid, 833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 803 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:07:50,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10994 states. [2022-11-03 02:07:51,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10994 to 9872. [2022-11-03 02:07:51,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9872 states, 9806 states have (on average 3.6468488680399753) internal successors, (35761), 9871 states have internal predecessors, (35761), 0 states have call successors, (0), 0 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 02:07:51,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9872 states to 9872 states and 35761 transitions. [2022-11-03 02:07:51,343 INFO L78 Accepts]: Start accepts. Automaton has 9872 states and 35761 transitions. Word has length 16 [2022-11-03 02:07:51,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:51,344 INFO L495 AbstractCegarLoop]: Abstraction has 9872 states and 35761 transitions. [2022-11-03 02:07:51,344 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 02:07:51,344 INFO L276 IsEmpty]: Start isEmpty. Operand 9872 states and 35761 transitions. [2022-11-03 02:07:51,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-03 02:07:51,350 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:51,351 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 02:07:51,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-03 02:07:51,351 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting qrcu_reader1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [qrcu_reader1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2022-11-03 02:07:51,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:51,351 INFO L85 PathProgramCache]: Analyzing trace with hash 411401032, now seen corresponding path program 1 times [2022-11-03 02:07:51,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:07:51,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489312208] [2022-11-03 02:07:51,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:51,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:07:51,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:51,447 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 02:07:51,447 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:07:51,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489312208] [2022-11-03 02:07:51,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489312208] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:07:51,448 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:07:51,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:07:51,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721944671] [2022-11-03 02:07:51,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:07:51,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:07:51,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:07:51,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:07:51,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:07:51,450 INFO L87 Difference]: Start difference. First operand 9872 states and 35761 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 02:07:51,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:51,763 INFO L93 Difference]: Finished difference Result 10184 states and 35363 transitions. [2022-11-03 02:07:51,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:07:51,763 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 02:07:51,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:51,788 INFO L225 Difference]: With dead ends: 10184 [2022-11-03 02:07:51,788 INFO L226 Difference]: Without dead ends: 10008 [2022-11-03 02:07:51,789 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 02:07:51,789 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 78 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:51,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 45 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:07:51,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10008 states. [2022-11-03 02:07:51,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10008 to 8508. [2022-11-03 02:07:51,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8508 states, 8446 states have (on average 3.517996684821217) internal successors, (29713), 8507 states have internal predecessors, (29713), 0 states have call successors, (0), 0 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 02:07:51,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8508 states to 8508 states and 29713 transitions. [2022-11-03 02:07:51,963 INFO L78 Accepts]: Start accepts. Automaton has 8508 states and 29713 transitions. Word has length 17 [2022-11-03 02:07:51,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:51,963 INFO L495 AbstractCegarLoop]: Abstraction has 8508 states and 29713 transitions. [2022-11-03 02:07:51,963 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 02:07:51,963 INFO L276 IsEmpty]: Start isEmpty. Operand 8508 states and 29713 transitions. [2022-11-03 02:07:51,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-03 02:07:51,968 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:51,969 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 02:07:51,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-11-03 02:07:51,969 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting qrcu_updaterErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [qrcu_reader1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2022-11-03 02:07:51,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:51,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1831664723, now seen corresponding path program 1 times [2022-11-03 02:07:51,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:07:51,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603264869] [2022-11-03 02:07:51,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:51,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:07:51,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:52,123 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 02:07:52,124 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:07:52,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603264869] [2022-11-03 02:07:52,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603264869] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:07:52,124 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:07:52,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:07:52,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940896864] [2022-11-03 02:07:52,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:07:52,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:07:52,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:07:52,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:07:52,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:07:52,126 INFO L87 Difference]: Start difference. First operand 8508 states and 29713 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 02:07:52,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:52,563 INFO L93 Difference]: Finished difference Result 9186 states and 32930 transitions. [2022-11-03 02:07:52,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:07:52,563 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 02:07:52,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:52,590 INFO L225 Difference]: With dead ends: 9186 [2022-11-03 02:07:52,591 INFO L226 Difference]: Without dead ends: 9186 [2022-11-03 02:07:52,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:07:52,591 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 150 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:52,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 57 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:07:52,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9186 states. [2022-11-03 02:07:52,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9186 to 8460. [2022-11-03 02:07:52,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8460 states, 8398 states have (on average 3.520957370802572) internal successors, (29569), 8459 states have internal predecessors, (29569), 0 states have call successors, (0), 0 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 02:07:52,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8460 states to 8460 states and 29569 transitions. [2022-11-03 02:07:52,983 INFO L78 Accepts]: Start accepts. Automaton has 8460 states and 29569 transitions. Word has length 18 [2022-11-03 02:07:52,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:52,983 INFO L495 AbstractCegarLoop]: Abstraction has 8460 states and 29569 transitions. [2022-11-03 02:07:52,984 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 02:07:52,984 INFO L276 IsEmpty]: Start isEmpty. Operand 8460 states and 29569 transitions. [2022-11-03 02:07:52,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-03 02:07:52,990 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:52,990 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 02:07:52,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-11-03 02:07:52,991 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting qrcu_updaterErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [qrcu_reader1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2022-11-03 02:07:52,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:52,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1541923074, now seen corresponding path program 1 times [2022-11-03 02:07:52,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:07:52,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082799728] [2022-11-03 02:07:52,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:52,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:07:53,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:53,085 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 02:07:53,085 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:07:53,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082799728] [2022-11-03 02:07:53,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082799728] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:07:53,086 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:07:53,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:07:53,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078317060] [2022-11-03 02:07:53,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:07:53,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:07:53,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:07:53,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:07:53,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:07:53,088 INFO L87 Difference]: Start difference. First operand 8460 states and 29569 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 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 02:07:53,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:53,489 INFO L93 Difference]: Finished difference Result 9066 states and 31336 transitions. [2022-11-03 02:07:53,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:07:53,490 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 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 02:07:53,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:53,519 INFO L225 Difference]: With dead ends: 9066 [2022-11-03 02:07:53,520 INFO L226 Difference]: Without dead ends: 9066 [2022-11-03 02:07:53,520 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 02:07:53,521 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 92 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:53,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 61 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:07:53,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9066 states. [2022-11-03 02:07:53,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9066 to 8616. [2022-11-03 02:07:53,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8616 states, 8554 states have (on average 3.513444002805705) internal successors, (30054), 8615 states have internal predecessors, (30054), 0 states have call successors, (0), 0 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 02:07:53,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8616 states to 8616 states and 30054 transitions. [2022-11-03 02:07:53,696 INFO L78 Accepts]: Start accepts. Automaton has 8616 states and 30054 transitions. Word has length 18 [2022-11-03 02:07:53,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:53,697 INFO L495 AbstractCegarLoop]: Abstraction has 8616 states and 30054 transitions. [2022-11-03 02:07:53,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 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 02:07:53,697 INFO L276 IsEmpty]: Start isEmpty. Operand 8616 states and 30054 transitions. [2022-11-03 02:07:53,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-03 02:07:53,705 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:53,705 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 02:07:53,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-11-03 02:07:53,706 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting qrcu_updaterErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [qrcu_reader1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2022-11-03 02:07:53,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:53,706 INFO L85 PathProgramCache]: Analyzing trace with hash -945509602, now seen corresponding path program 2 times [2022-11-03 02:07:53,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:07:53,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226186980] [2022-11-03 02:07:53,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:53,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:07:53,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:53,871 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 02:07:53,872 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:07:53,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226186980] [2022-11-03 02:07:53,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226186980] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:07:53,872 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:07:53,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:07:53,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837756667] [2022-11-03 02:07:53,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:07:53,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:07:53,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:07:53,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:07:53,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:07:53,876 INFO L87 Difference]: Start difference. First operand 8616 states and 30054 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 02:07:54,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:54,419 INFO L93 Difference]: Finished difference Result 9222 states and 32555 transitions. [2022-11-03 02:07:54,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 02:07:54,420 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 02:07:54,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:54,454 INFO L225 Difference]: With dead ends: 9222 [2022-11-03 02:07:54,454 INFO L226 Difference]: Without dead ends: 9222 [2022-11-03 02:07:54,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:07:54,455 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 209 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:54,456 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 69 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:07:54,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9222 states. [2022-11-03 02:07:54,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9222 to 8580. [2022-11-03 02:07:54,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8580 states, 8518 states have (on average 3.5133834233388117) internal successors, (29927), 8579 states have internal predecessors, (29927), 0 states have call successors, (0), 0 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 02:07:54,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8580 states to 8580 states and 29927 transitions. [2022-11-03 02:07:54,859 INFO L78 Accepts]: Start accepts. Automaton has 8580 states and 29927 transitions. Word has length 18 [2022-11-03 02:07:54,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:54,860 INFO L495 AbstractCegarLoop]: Abstraction has 8580 states and 29927 transitions. [2022-11-03 02:07:54,860 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 02:07:54,860 INFO L276 IsEmpty]: Start isEmpty. Operand 8580 states and 29927 transitions. [2022-11-03 02:07:54,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-03 02:07:54,871 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:54,872 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 02:07:54,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-11-03 02:07:54,872 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting qrcu_updaterErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [qrcu_reader1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2022-11-03 02:07:54,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:54,873 INFO L85 PathProgramCache]: Analyzing trace with hash -944157382, now seen corresponding path program 3 times [2022-11-03 02:07:54,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:07:54,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804971691] [2022-11-03 02:07:54,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:54,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:07:54,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:55,079 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 02:07:55,079 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:07:55,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804971691] [2022-11-03 02:07:55,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804971691] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:07:55,080 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:07:55,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:07:55,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153711148] [2022-11-03 02:07:55,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:07:55,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:07:55,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:07:55,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:07:55,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:07:55,082 INFO L87 Difference]: Start difference. First operand 8580 states and 29927 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 02:07:55,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:55,697 INFO L93 Difference]: Finished difference Result 8958 states and 31666 transitions. [2022-11-03 02:07:55,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:07:55,698 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 02:07:55,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:55,740 INFO L225 Difference]: With dead ends: 8958 [2022-11-03 02:07:55,740 INFO L226 Difference]: Without dead ends: 8958 [2022-11-03 02:07:55,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:07:55,742 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 149 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:55,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 74 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 555 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:07:55,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8958 states. [2022-11-03 02:07:56,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8958 to 8442. [2022-11-03 02:07:56,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8442 states, 8380 states have (on average 3.513603818615752) internal successors, (29444), 8441 states have internal predecessors, (29444), 0 states have call successors, (0), 0 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 02:07:56,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8442 states to 8442 states and 29444 transitions. [2022-11-03 02:07:56,064 INFO L78 Accepts]: Start accepts. Automaton has 8442 states and 29444 transitions. Word has length 18 [2022-11-03 02:07:56,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:56,065 INFO L495 AbstractCegarLoop]: Abstraction has 8442 states and 29444 transitions. [2022-11-03 02:07:56,065 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 02:07:56,065 INFO L276 IsEmpty]: Start isEmpty. Operand 8442 states and 29444 transitions. [2022-11-03 02:07:56,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-03 02:07:56,075 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:56,075 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 02:07:56,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-11-03 02:07:56,076 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 02:07:56,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:56,076 INFO L85 PathProgramCache]: Analyzing trace with hash -2103091221, now seen corresponding path program 1 times [2022-11-03 02:07:56,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:07:56,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502527454] [2022-11-03 02:07:56,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:56,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:07:56,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:56,269 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 02:07:56,269 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:07:56,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502527454] [2022-11-03 02:07:56,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502527454] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:07:56,270 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:07:56,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:07:56,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355181845] [2022-11-03 02:07:56,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:07:56,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:07:56,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:07:56,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:07:56,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:07:56,272 INFO L87 Difference]: Start difference. First operand 8442 states and 29444 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 02:07:56,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:56,885 INFO L93 Difference]: Finished difference Result 9578 states and 32910 transitions. [2022-11-03 02:07:56,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:07:56,886 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 02:07:56,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:56,916 INFO L225 Difference]: With dead ends: 9578 [2022-11-03 02:07:56,917 INFO L226 Difference]: Without dead ends: 9578 [2022-11-03 02:07:56,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:07:56,918 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 184 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 635 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:56,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 67 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 635 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:07:56,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9578 states. [2022-11-03 02:07:57,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9578 to 8172. [2022-11-03 02:07:57,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8172 states, 8110 states have (on average 3.5140567200986434) internal successors, (28499), 8171 states have internal predecessors, (28499), 0 states have call successors, (0), 0 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 02:07:57,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8172 states to 8172 states and 28499 transitions. [2022-11-03 02:07:57,294 INFO L78 Accepts]: Start accepts. Automaton has 8172 states and 28499 transitions. Word has length 18 [2022-11-03 02:07:57,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:57,294 INFO L495 AbstractCegarLoop]: Abstraction has 8172 states and 28499 transitions. [2022-11-03 02:07:57,294 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 02:07:57,295 INFO L276 IsEmpty]: Start isEmpty. Operand 8172 states and 28499 transitions. [2022-11-03 02:07:57,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-03 02:07:57,301 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:57,301 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 02:07:57,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-11-03 02:07:57,301 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 02:07:57,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:57,302 INFO L85 PathProgramCache]: Analyzing trace with hash 2061029725, now seen corresponding path program 2 times [2022-11-03 02:07:57,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:07:57,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727037985] [2022-11-03 02:07:57,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:57,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:07:57,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:57,490 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 02:07:57,490 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:07:57,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727037985] [2022-11-03 02:07:57,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727037985] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:07:57,491 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:07:57,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:07:57,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170776054] [2022-11-03 02:07:57,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:07:57,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:07:57,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:07:57,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:07:57,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:07:57,493 INFO L87 Difference]: Start difference. First operand 8172 states and 28499 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 02:07:58,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:58,165 INFO L93 Difference]: Finished difference Result 9884 states and 34077 transitions. [2022-11-03 02:07:58,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 02:07:58,166 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 02:07:58,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:58,191 INFO L225 Difference]: With dead ends: 9884 [2022-11-03 02:07:58,191 INFO L226 Difference]: Without dead ends: 9884 [2022-11-03 02:07:58,191 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:07:58,192 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 387 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:58,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [387 Valid, 57 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:07:58,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9884 states. [2022-11-03 02:07:58,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9884 to 8160. [2022-11-03 02:07:58,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8160 states, 8098 states have (on average 3.5125957026426278) internal successors, (28445), 8159 states have internal predecessors, (28445), 0 states have call successors, (0), 0 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 02:07:58,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8160 states to 8160 states and 28445 transitions. [2022-11-03 02:07:58,378 INFO L78 Accepts]: Start accepts. Automaton has 8160 states and 28445 transitions. Word has length 18 [2022-11-03 02:07:58,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:58,378 INFO L495 AbstractCegarLoop]: Abstraction has 8160 states and 28445 transitions. [2022-11-03 02:07:58,378 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 02:07:58,378 INFO L276 IsEmpty]: Start isEmpty. Operand 8160 states and 28445 transitions. [2022-11-03 02:07:58,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-03 02:07:58,383 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:58,383 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 02:07:58,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-11-03 02:07:58,384 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting qrcu_updaterErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [qrcu_reader1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2022-11-03 02:07:58,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:58,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1526950373, now seen corresponding path program 3 times [2022-11-03 02:07:58,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:07:58,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915569998] [2022-11-03 02:07:58,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:58,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:07:58,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:58,513 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 02:07:58,514 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:07:58,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915569998] [2022-11-03 02:07:58,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915569998] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:07:58,514 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:07:58,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:07:58,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434529213] [2022-11-03 02:07:58,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:07:58,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:07:58,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:07:58,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:07:58,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:07:58,516 INFO L87 Difference]: Start difference. First operand 8160 states and 28445 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 02:07:58,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:58,954 INFO L93 Difference]: Finished difference Result 9136 states and 30931 transitions. [2022-11-03 02:07:58,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:07:58,954 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 02:07:58,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:58,977 INFO L225 Difference]: With dead ends: 9136 [2022-11-03 02:07:58,977 INFO L226 Difference]: Without dead ends: 9130 [2022-11-03 02:07:58,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:07:58,978 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 296 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:58,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [296 Valid, 55 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:07:58,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9130 states. [2022-11-03 02:07:59,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9130 to 7872. [2022-11-03 02:07:59,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7872 states, 7806 states have (on average 3.467973353830387) internal successors, (27071), 7871 states have internal predecessors, (27071), 0 states have call successors, (0), 0 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 02:07:59,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7872 states to 7872 states and 27071 transitions. [2022-11-03 02:07:59,265 INFO L78 Accepts]: Start accepts. Automaton has 7872 states and 27071 transitions. Word has length 18 [2022-11-03 02:07:59,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:59,265 INFO L495 AbstractCegarLoop]: Abstraction has 7872 states and 27071 transitions. [2022-11-03 02:07:59,266 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 02:07:59,266 INFO L276 IsEmpty]: Start isEmpty. Operand 7872 states and 27071 transitions. [2022-11-03 02:07:59,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-03 02:07:59,271 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:59,271 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 02:07:59,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-11-03 02:07:59,271 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting qrcu_updaterErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [qrcu_reader1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2022-11-03 02:07:59,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:59,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1955039344, now seen corresponding path program 1 times [2022-11-03 02:07:59,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:07:59,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745578107] [2022-11-03 02:07:59,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:59,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:07:59,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:59,467 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 02:07:59,467 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:07:59,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745578107] [2022-11-03 02:07:59,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745578107] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:07:59,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:07:59,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:07:59,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935211441] [2022-11-03 02:07:59,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:07:59,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:07:59,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:07:59,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:07:59,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:07:59,473 INFO L87 Difference]: Start difference. First operand 7872 states and 27071 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) [2022-11-03 02:08:00,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:00,231 INFO L93 Difference]: Finished difference Result 9300 states and 32207 transitions. [2022-11-03 02:08:00,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 02:08:00,232 INFO L78 Accepts]: Start accepts. Automaton has 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) Word has length 19 [2022-11-03 02:08:00,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:00,268 INFO L225 Difference]: With dead ends: 9300 [2022-11-03 02:08:00,269 INFO L226 Difference]: Without dead ends: 9300 [2022-11-03 02:08:00,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:08:00,270 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 152 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 850 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 850 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:00,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 101 Invalid, 874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 850 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 02:08:00,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9300 states. [2022-11-03 02:08:00,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9300 to 8154. [2022-11-03 02:08:00,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8154 states, 8088 states have (on average 3.460929772502473) internal successors, (27992), 8153 states have internal predecessors, (27992), 0 states have call successors, (0), 0 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 02:08:00,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8154 states to 8154 states and 27992 transitions. [2022-11-03 02:08:00,460 INFO L78 Accepts]: Start accepts. Automaton has 8154 states and 27992 transitions. Word has length 19 [2022-11-03 02:08:00,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:00,460 INFO L495 AbstractCegarLoop]: Abstraction has 8154 states and 27992 transitions. [2022-11-03 02:08:00,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has 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) [2022-11-03 02:08:00,461 INFO L276 IsEmpty]: Start isEmpty. Operand 8154 states and 27992 transitions. [2022-11-03 02:08:00,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-03 02:08:00,469 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:00,469 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 02:08:00,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-11-03 02:08:00,469 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting qrcu_updaterErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [qrcu_reader1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2022-11-03 02:08:00,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:00,469 INFO L85 PathProgramCache]: Analyzing trace with hash 514404150, now seen corresponding path program 1 times [2022-11-03 02:08:00,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:08:00,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792609455] [2022-11-03 02:08:00,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:00,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:08:00,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:00,604 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 02:08:00,605 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:08:00,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792609455] [2022-11-03 02:08:00,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792609455] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:08:00,605 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:08:00,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:08:00,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468210336] [2022-11-03 02:08:00,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:08:00,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:08:00,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:08:00,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:08:00,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:08:00,607 INFO L87 Difference]: Start difference. First operand 8154 states and 27992 transitions. Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 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) [2022-11-03 02:08:01,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:01,131 INFO L93 Difference]: Finished difference Result 8502 states and 29708 transitions. [2022-11-03 02:08:01,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:08:01,132 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 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) Word has length 19 [2022-11-03 02:08:01,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:01,162 INFO L225 Difference]: With dead ends: 8502 [2022-11-03 02:08:01,162 INFO L226 Difference]: Without dead ends: 8502 [2022-11-03 02:08:01,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:08:01,163 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 136 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:01,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 69 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:08:01,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8502 states. [2022-11-03 02:08:01,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8502 to 7524. [2022-11-03 02:08:01,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7524 states, 7458 states have (on average 3.466747117189595) internal successors, (25855), 7523 states have internal predecessors, (25855), 0 states have call successors, (0), 0 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 02:08:01,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7524 states to 7524 states and 25855 transitions. [2022-11-03 02:08:01,587 INFO L78 Accepts]: Start accepts. Automaton has 7524 states and 25855 transitions. Word has length 19 [2022-11-03 02:08:01,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:01,588 INFO L495 AbstractCegarLoop]: Abstraction has 7524 states and 25855 transitions. [2022-11-03 02:08:01,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 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) [2022-11-03 02:08:01,588 INFO L276 IsEmpty]: Start isEmpty. Operand 7524 states and 25855 transitions. [2022-11-03 02:08:01,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-03 02:08:01,596 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:01,596 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:08:01,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-11-03 02:08:01,596 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting qrcu_reader1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW === [qrcu_reader1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2022-11-03 02:08:01,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:01,597 INFO L85 PathProgramCache]: Analyzing trace with hash -2025523941, now seen corresponding path program 1 times [2022-11-03 02:08:01,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:08:01,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572581813] [2022-11-03 02:08:01,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:01,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:08:01,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:01,655 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 02:08:01,656 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:08:01,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572581813] [2022-11-03 02:08:01,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572581813] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:08:01,656 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:08:01,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:08:01,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324607730] [2022-11-03 02:08:01,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:08:01,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:08:01,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:08:01,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:08:01,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:08:01,658 INFO L87 Difference]: Start difference. First operand 7524 states and 25855 transitions. Second operand has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 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 02:08:01,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:01,888 INFO L93 Difference]: Finished difference Result 8934 states and 31341 transitions. [2022-11-03 02:08:01,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:08:01,888 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 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 20 [2022-11-03 02:08:01,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:01,910 INFO L225 Difference]: With dead ends: 8934 [2022-11-03 02:08:01,910 INFO L226 Difference]: Without dead ends: 8910 [2022-11-03 02:08:01,911 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 02:08:01,911 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 135 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:01,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 68 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:08:01,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8910 states. [2022-11-03 02:08:02,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8910 to 7150. [2022-11-03 02:08:02,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7150 states, 7091 states have (on average 3.4992243689183473) internal successors, (24813), 7149 states have internal predecessors, (24813), 0 states have call successors, (0), 0 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 02:08:02,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7150 states to 7150 states and 24813 transitions. [2022-11-03 02:08:02,060 INFO L78 Accepts]: Start accepts. Automaton has 7150 states and 24813 transitions. Word has length 20 [2022-11-03 02:08:02,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:02,061 INFO L495 AbstractCegarLoop]: Abstraction has 7150 states and 24813 transitions. [2022-11-03 02:08:02,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 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 02:08:02,061 INFO L276 IsEmpty]: Start isEmpty. Operand 7150 states and 24813 transitions. [2022-11-03 02:08:02,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-03 02:08:02,066 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:02,066 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:08:02,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-11-03 02:08:02,066 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting qrcu_reader2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [qrcu_reader1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2022-11-03 02:08:02,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:02,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1660280347, now seen corresponding path program 1 times [2022-11-03 02:08:02,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:08:02,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817515294] [2022-11-03 02:08:02,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:02,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:08:02,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:02,144 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 02:08:02,145 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:08:02,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817515294] [2022-11-03 02:08:02,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817515294] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:08:02,145 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:08:02,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:08:02,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461410792] [2022-11-03 02:08:02,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:08:02,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:08:02,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:08:02,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:08:02,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:08:02,147 INFO L87 Difference]: Start difference. First operand 7150 states and 24813 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 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 02:08:02,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:02,494 INFO L93 Difference]: Finished difference Result 7714 states and 26649 transitions. [2022-11-03 02:08:02,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:08:02,495 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 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 20 [2022-11-03 02:08:02,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:02,523 INFO L225 Difference]: With dead ends: 7714 [2022-11-03 02:08:02,523 INFO L226 Difference]: Without dead ends: 7714 [2022-11-03 02:08:02,523 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:08:02,524 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 184 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:02,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 69 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:08:02,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7714 states. [2022-11-03 02:08:02,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7714 to 7326. [2022-11-03 02:08:02,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7326 states, 7275 states have (on average 3.5351202749140893) internal successors, (25718), 7325 states have internal predecessors, (25718), 0 states have call successors, (0), 0 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 02:08:02,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7326 states to 7326 states and 25718 transitions. [2022-11-03 02:08:02,734 INFO L78 Accepts]: Start accepts. Automaton has 7326 states and 25718 transitions. Word has length 20 [2022-11-03 02:08:02,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:02,734 INFO L495 AbstractCegarLoop]: Abstraction has 7326 states and 25718 transitions. [2022-11-03 02:08:02,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 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 02:08:02,735 INFO L276 IsEmpty]: Start isEmpty. Operand 7326 states and 25718 transitions. [2022-11-03 02:08:02,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-03 02:08:02,743 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:02,743 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:08:02,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-11-03 02:08:02,744 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting qrcu_reader2Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [qrcu_reader1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2022-11-03 02:08:02,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:02,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1394991122, now seen corresponding path program 1 times [2022-11-03 02:08:02,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:08:02,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477674914] [2022-11-03 02:08:02,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:02,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:08:02,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:02,818 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 02:08:02,819 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:08:02,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477674914] [2022-11-03 02:08:02,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477674914] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:08:02,819 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:08:02,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:08:02,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122389104] [2022-11-03 02:08:02,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:08:02,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:08:02,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:08:02,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:08:02,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:08:02,821 INFO L87 Difference]: Start difference. First operand 7326 states and 25718 transitions. Second operand has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 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 02:08:03,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:03,110 INFO L93 Difference]: Finished difference Result 8604 states and 30656 transitions. [2022-11-03 02:08:03,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:08:03,111 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 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 20 [2022-11-03 02:08:03,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:03,145 INFO L225 Difference]: With dead ends: 8604 [2022-11-03 02:08:03,146 INFO L226 Difference]: Without dead ends: 8532 [2022-11-03 02:08:03,146 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 02:08:03,147 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 118 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:03,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 77 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:08:03,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8532 states. [2022-11-03 02:08:03,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8532 to 7530. [2022-11-03 02:08:03,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7530 states, 7484 states have (on average 3.5271245323356495) internal successors, (26397), 7529 states have internal predecessors, (26397), 0 states have call successors, (0), 0 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 02:08:03,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7530 states to 7530 states and 26397 transitions. [2022-11-03 02:08:03,420 INFO L78 Accepts]: Start accepts. Automaton has 7530 states and 26397 transitions. Word has length 20 [2022-11-03 02:08:03,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:03,421 INFO L495 AbstractCegarLoop]: Abstraction has 7530 states and 26397 transitions. [2022-11-03 02:08:03,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 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 02:08:03,422 INFO L276 IsEmpty]: Start isEmpty. Operand 7530 states and 26397 transitions. [2022-11-03 02:08:03,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-03 02:08:03,431 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:03,431 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:08:03,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-11-03 02:08:03,431 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting qrcu_updaterErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [qrcu_reader1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2022-11-03 02:08:03,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:03,432 INFO L85 PathProgramCache]: Analyzing trace with hash 108157843, now seen corresponding path program 1 times [2022-11-03 02:08:03,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:08:03,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499787476] [2022-11-03 02:08:03,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:03,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:08:03,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:03,724 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 02:08:03,724 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:08:03,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499787476] [2022-11-03 02:08:03,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499787476] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:08:03,724 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:08:03,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:08:03,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138428578] [2022-11-03 02:08:03,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:08:03,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:08:03,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:08:03,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:08:03,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:08:03,726 INFO L87 Difference]: Start difference. First operand 7530 states and 26397 transitions. Second operand has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 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 02:08:04,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:04,956 INFO L93 Difference]: Finished difference Result 10036 states and 35130 transitions. [2022-11-03 02:08:04,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:08:04,956 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 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 21 [2022-11-03 02:08:04,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:04,982 INFO L225 Difference]: With dead ends: 10036 [2022-11-03 02:08:04,982 INFO L226 Difference]: Without dead ends: 10036 [2022-11-03 02:08:04,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=151, Invalid=355, Unknown=0, NotChecked=0, Total=506 [2022-11-03 02:08:04,982 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 413 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 1173 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 1222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:04,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [413 Valid, 65 Invalid, 1222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1173 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-03 02:08:04,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10036 states. [2022-11-03 02:08:05,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10036 to 8924. [2022-11-03 02:08:05,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8924 states, 8878 states have (on average 3.5013516557783286) internal successors, (31085), 8923 states have internal predecessors, (31085), 0 states have call successors, (0), 0 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 02:08:05,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8924 states to 8924 states and 31085 transitions. [2022-11-03 02:08:05,169 INFO L78 Accepts]: Start accepts. Automaton has 8924 states and 31085 transitions. Word has length 21 [2022-11-03 02:08:05,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:05,169 INFO L495 AbstractCegarLoop]: Abstraction has 8924 states and 31085 transitions. [2022-11-03 02:08:05,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 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 02:08:05,170 INFO L276 IsEmpty]: Start isEmpty. Operand 8924 states and 31085 transitions. [2022-11-03 02:08:05,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-03 02:08:05,178 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:05,178 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:08:05,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-11-03 02:08:05,179 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting qrcu_updaterErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [qrcu_reader1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2022-11-03 02:08:05,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:05,179 INFO L85 PathProgramCache]: Analyzing trace with hash -140538135, now seen corresponding path program 2 times [2022-11-03 02:08:05,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:08:05,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064746227] [2022-11-03 02:08:05,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:05,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:08:05,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:05,417 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 02:08:05,417 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:08:05,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064746227] [2022-11-03 02:08:05,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064746227] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:08:05,418 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:08:05,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:08:05,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537641030] [2022-11-03 02:08:05,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:08:05,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:08:05,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:08:05,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:08:05,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:08:05,422 INFO L87 Difference]: Start difference. First operand 8924 states and 31085 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 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 02:08:06,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:06,280 INFO L93 Difference]: Finished difference Result 11708 states and 39660 transitions. [2022-11-03 02:08:06,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 02:08:06,281 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 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 21 [2022-11-03 02:08:06,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:06,309 INFO L225 Difference]: With dead ends: 11708 [2022-11-03 02:08:06,310 INFO L226 Difference]: Without dead ends: 11708 [2022-11-03 02:08:06,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:08:06,311 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 196 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:06,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 104 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 710 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 02:08:06,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11708 states. [2022-11-03 02:08:06,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11708 to 8834. [2022-11-03 02:08:06,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8834 states, 8788 states have (on average 3.492717341829768) internal successors, (30694), 8833 states have internal predecessors, (30694), 0 states have call successors, (0), 0 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 02:08:06,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8834 states to 8834 states and 30694 transitions. [2022-11-03 02:08:06,530 INFO L78 Accepts]: Start accepts. Automaton has 8834 states and 30694 transitions. Word has length 21 [2022-11-03 02:08:06,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:06,530 INFO L495 AbstractCegarLoop]: Abstraction has 8834 states and 30694 transitions. [2022-11-03 02:08:06,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 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 02:08:06,530 INFO L276 IsEmpty]: Start isEmpty. Operand 8834 states and 30694 transitions. [2022-11-03 02:08:06,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-03 02:08:06,537 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:06,538 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:08:06,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-11-03 02:08:06,538 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting qrcu_updaterErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [qrcu_reader1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2022-11-03 02:08:06,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:06,538 INFO L85 PathProgramCache]: Analyzing trace with hash -140524185, now seen corresponding path program 3 times [2022-11-03 02:08:06,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:08:06,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706663849] [2022-11-03 02:08:06,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:06,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:08:06,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:06,730 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 02:08:06,730 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:08:06,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706663849] [2022-11-03 02:08:06,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706663849] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:08:06,731 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:08:06,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:08:06,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856102242] [2022-11-03 02:08:06,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:08:06,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:08:06,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:08:06,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:08:06,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:08:06,733 INFO L87 Difference]: Start difference. First operand 8834 states and 30694 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 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 02:08:07,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:07,401 INFO L93 Difference]: Finished difference Result 10620 states and 36556 transitions. [2022-11-03 02:08:07,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 02:08:07,402 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 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 21 [2022-11-03 02:08:07,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:07,428 INFO L225 Difference]: With dead ends: 10620 [2022-11-03 02:08:07,428 INFO L226 Difference]: Without dead ends: 10620 [2022-11-03 02:08:07,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:08:07,429 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 261 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 639 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:07,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [261 Valid, 78 Invalid, 682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 639 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:08:07,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10620 states. [2022-11-03 02:08:07,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10620 to 8490. [2022-11-03 02:08:07,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8490 states, 8444 states have (on average 3.523685457129323) internal successors, (29754), 8489 states have internal predecessors, (29754), 0 states have call successors, (0), 0 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 02:08:07,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8490 states to 8490 states and 29754 transitions. [2022-11-03 02:08:07,602 INFO L78 Accepts]: Start accepts. Automaton has 8490 states and 29754 transitions. Word has length 21 [2022-11-03 02:08:07,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:07,603 INFO L495 AbstractCegarLoop]: Abstraction has 8490 states and 29754 transitions. [2022-11-03 02:08:07,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 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 02:08:07,603 INFO L276 IsEmpty]: Start isEmpty. Operand 8490 states and 29754 transitions. [2022-11-03 02:08:07,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-03 02:08:07,610 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:07,611 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:08:07,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-11-03 02:08:07,611 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting qrcu_updaterErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [qrcu_reader1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2022-11-03 02:08:07,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:07,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1522438075, now seen corresponding path program 4 times [2022-11-03 02:08:07,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:08:07,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893728255] [2022-11-03 02:08:07,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:07,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:08:07,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:07,809 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 02:08:07,809 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:08:07,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893728255] [2022-11-03 02:08:07,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893728255] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:08:07,811 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:08:07,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:08:07,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170309178] [2022-11-03 02:08:07,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:08:07,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:08:07,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:08:07,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:08:07,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:08:07,814 INFO L87 Difference]: Start difference. First operand 8490 states and 29754 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 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 02:08:08,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:08,586 INFO L93 Difference]: Finished difference Result 10946 states and 38529 transitions. [2022-11-03 02:08:08,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 02:08:08,586 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 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 21 [2022-11-03 02:08:08,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:08,625 INFO L225 Difference]: With dead ends: 10946 [2022-11-03 02:08:08,625 INFO L226 Difference]: Without dead ends: 10946 [2022-11-03 02:08:08,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:08:08,626 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 178 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 825 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:08,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 99 Invalid, 857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 825 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 02:08:08,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10946 states. [2022-11-03 02:08:08,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10946 to 8530. [2022-11-03 02:08:08,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8530 states, 8484 states have (on average 3.520744931636021) internal successors, (29870), 8529 states have internal predecessors, (29870), 0 states have call successors, (0), 0 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 02:08:08,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8530 states to 8530 states and 29870 transitions. [2022-11-03 02:08:08,912 INFO L78 Accepts]: Start accepts. Automaton has 8530 states and 29870 transitions. Word has length 21 [2022-11-03 02:08:08,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:08,913 INFO L495 AbstractCegarLoop]: Abstraction has 8530 states and 29870 transitions. [2022-11-03 02:08:08,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 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 02:08:08,913 INFO L276 IsEmpty]: Start isEmpty. Operand 8530 states and 29870 transitions. [2022-11-03 02:08:08,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-03 02:08:08,922 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:08,922 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:08:08,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-11-03 02:08:08,922 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting qrcu_updaterErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [qrcu_reader1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2022-11-03 02:08:08,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:08,923 INFO L85 PathProgramCache]: Analyzing trace with hash -497924411, now seen corresponding path program 5 times [2022-11-03 02:08:08,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:08:08,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844911621] [2022-11-03 02:08:08,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:08,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:08:08,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:09,122 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 02:08:09,122 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:08:09,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844911621] [2022-11-03 02:08:09,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844911621] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:08:09,123 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:08:09,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:08:09,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515225229] [2022-11-03 02:08:09,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:08:09,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:08:09,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:08:09,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:08:09,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:08:09,125 INFO L87 Difference]: Start difference. First operand 8530 states and 29870 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 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 02:08:09,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:09,871 INFO L93 Difference]: Finished difference Result 10502 states and 38018 transitions. [2022-11-03 02:08:09,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 02:08:09,871 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 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 21 [2022-11-03 02:08:09,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:09,913 INFO L225 Difference]: With dead ends: 10502 [2022-11-03 02:08:09,914 INFO L226 Difference]: Without dead ends: 10502 [2022-11-03 02:08:09,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:08:09,916 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 162 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 771 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 771 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:09,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 104 Invalid, 801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 771 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 02:08:09,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10502 states. [2022-11-03 02:08:10,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10502 to 7512. [2022-11-03 02:08:10,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7512 states, 7469 states have (on average 3.529789797831035) internal successors, (26364), 7511 states have internal predecessors, (26364), 0 states have call successors, (0), 0 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 02:08:10,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7512 states to 7512 states and 26364 transitions. [2022-11-03 02:08:10,147 INFO L78 Accepts]: Start accepts. Automaton has 7512 states and 26364 transitions. Word has length 21 [2022-11-03 02:08:10,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:10,148 INFO L495 AbstractCegarLoop]: Abstraction has 7512 states and 26364 transitions. [2022-11-03 02:08:10,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 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 02:08:10,148 INFO L276 IsEmpty]: Start isEmpty. Operand 7512 states and 26364 transitions. [2022-11-03 02:08:10,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-03 02:08:10,157 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:10,157 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:08:10,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-11-03 02:08:10,158 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting qrcu_updaterErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [qrcu_reader1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2022-11-03 02:08:10,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:10,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1085626366, now seen corresponding path program 1 times [2022-11-03 02:08:10,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:08:10,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192204176] [2022-11-03 02:08:10,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:10,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:08:10,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:10,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:08:10,323 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:08:10,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192204176] [2022-11-03 02:08:10,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192204176] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:08:10,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:08:10,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:08:10,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392770066] [2022-11-03 02:08:10,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:08:10,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:08:10,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:08:10,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:08:10,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:08:10,325 INFO L87 Difference]: Start difference. First operand 7512 states and 26364 transitions. Second operand has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 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 02:08:10,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:10,911 INFO L93 Difference]: Finished difference Result 9036 states and 30707 transitions. [2022-11-03 02:08:10,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:08:10,911 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 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 22 [2022-11-03 02:08:10,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:10,940 INFO L225 Difference]: With dead ends: 9036 [2022-11-03 02:08:10,940 INFO L226 Difference]: Without dead ends: 9036 [2022-11-03 02:08:10,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:08:10,941 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 215 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:10,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 61 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:08:10,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9036 states. [2022-11-03 02:08:11,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9036 to 7560. [2022-11-03 02:08:11,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7560 states, 7517 states have (on average 3.5244113343089) internal successors, (26493), 7559 states have internal predecessors, (26493), 0 states have call successors, (0), 0 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 02:08:11,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7560 states to 7560 states and 26493 transitions. [2022-11-03 02:08:11,117 INFO L78 Accepts]: Start accepts. Automaton has 7560 states and 26493 transitions. Word has length 22 [2022-11-03 02:08:11,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:11,117 INFO L495 AbstractCegarLoop]: Abstraction has 7560 states and 26493 transitions. [2022-11-03 02:08:11,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 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 02:08:11,117 INFO L276 IsEmpty]: Start isEmpty. Operand 7560 states and 26493 transitions. [2022-11-03 02:08:11,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-03 02:08:11,124 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:11,124 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:08:11,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-11-03 02:08:11,124 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting qrcu_updaterErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [qrcu_reader1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2022-11-03 02:08:11,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:11,125 INFO L85 PathProgramCache]: Analyzing trace with hash -2128702846, now seen corresponding path program 2 times [2022-11-03 02:08:11,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:08:11,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373277186] [2022-11-03 02:08:11,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:11,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:08:11,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:11,329 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 02:08:11,329 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:08:11,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373277186] [2022-11-03 02:08:11,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373277186] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:08:11,330 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:08:11,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:08:11,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128302718] [2022-11-03 02:08:11,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:08:11,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:08:11,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:08:11,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:08:11,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:08:11,333 INFO L87 Difference]: Start difference. First operand 7560 states and 26493 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 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 02:08:12,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:12,106 INFO L93 Difference]: Finished difference Result 10206 states and 35753 transitions. [2022-11-03 02:08:12,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-03 02:08:12,109 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 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 22 [2022-11-03 02:08:12,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:12,155 INFO L225 Difference]: With dead ends: 10206 [2022-11-03 02:08:12,156 INFO L226 Difference]: Without dead ends: 10206 [2022-11-03 02:08:12,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2022-11-03 02:08:12,157 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 331 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:12,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [331 Valid, 81 Invalid, 847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 733 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 02:08:12,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10206 states. [2022-11-03 02:08:12,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10206 to 8010. [2022-11-03 02:08:12,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8010 states, 7967 states have (on average 3.526547006401406) internal successors, (28096), 8009 states have internal predecessors, (28096), 0 states have call successors, (0), 0 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 02:08:12,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8010 states to 8010 states and 28096 transitions. [2022-11-03 02:08:12,367 INFO L78 Accepts]: Start accepts. Automaton has 8010 states and 28096 transitions. Word has length 22 [2022-11-03 02:08:12,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:12,367 INFO L495 AbstractCegarLoop]: Abstraction has 8010 states and 28096 transitions. [2022-11-03 02:08:12,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 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 02:08:12,368 INFO L276 IsEmpty]: Start isEmpty. Operand 8010 states and 28096 transitions. [2022-11-03 02:08:12,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-03 02:08:12,374 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:12,374 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:08:12,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-11-03 02:08:12,375 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting qrcu_updaterErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [qrcu_reader1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2022-11-03 02:08:12,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:12,375 INFO L85 PathProgramCache]: Analyzing trace with hash 854764750, now seen corresponding path program 3 times [2022-11-03 02:08:12,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:08:12,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115280622] [2022-11-03 02:08:12,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:12,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:08:12,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:12,629 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 02:08:12,629 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:08:12,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115280622] [2022-11-03 02:08:12,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115280622] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:08:12,630 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:08:12,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:08:12,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942311377] [2022-11-03 02:08:12,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:08:12,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:08:12,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:08:12,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:08:12,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:08:12,631 INFO L87 Difference]: Start difference. First operand 8010 states and 28096 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 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 02:08:13,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:13,793 INFO L93 Difference]: Finished difference Result 10106 states and 36135 transitions. [2022-11-03 02:08:13,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-03 02:08:13,794 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 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 22 [2022-11-03 02:08:13,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:13,820 INFO L225 Difference]: With dead ends: 10106 [2022-11-03 02:08:13,820 INFO L226 Difference]: Without dead ends: 10106 [2022-11-03 02:08:13,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2022-11-03 02:08:13,821 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 562 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 1259 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 562 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 1386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 1259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:13,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [562 Valid, 81 Invalid, 1386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 1259 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-03 02:08:13,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10106 states. [2022-11-03 02:08:13,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10106 to 7790. [2022-11-03 02:08:13,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7790 states, 7747 states have (on average 3.4960629921259843) internal successors, (27084), 7789 states have internal predecessors, (27084), 0 states have call successors, (0), 0 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 02:08:14,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7790 states to 7790 states and 27084 transitions. [2022-11-03 02:08:14,008 INFO L78 Accepts]: Start accepts. Automaton has 7790 states and 27084 transitions. Word has length 22 [2022-11-03 02:08:14,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:14,008 INFO L495 AbstractCegarLoop]: Abstraction has 7790 states and 27084 transitions. [2022-11-03 02:08:14,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 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 02:08:14,008 INFO L276 IsEmpty]: Start isEmpty. Operand 7790 states and 27084 transitions. [2022-11-03 02:08:14,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-03 02:08:14,014 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:14,014 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:08:14,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-11-03 02:08:14,014 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting qrcu_updaterErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [qrcu_reader1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2022-11-03 02:08:14,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:14,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1731503534, now seen corresponding path program 4 times [2022-11-03 02:08:14,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:08:14,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874093676] [2022-11-03 02:08:14,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:14,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:08:14,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:14,225 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 02:08:14,226 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:08:14,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874093676] [2022-11-03 02:08:14,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874093676] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:08:14,226 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:08:14,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:08:14,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073343651] [2022-11-03 02:08:14,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:08:14,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:08:14,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:08:14,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:08:14,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:08:14,228 INFO L87 Difference]: Start difference. First operand 7790 states and 27084 transitions. Second operand has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 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 02:08:14,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:14,956 INFO L93 Difference]: Finished difference Result 11144 states and 38085 transitions. [2022-11-03 02:08:14,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 02:08:14,956 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 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 22 [2022-11-03 02:08:14,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:14,985 INFO L225 Difference]: With dead ends: 11144 [2022-11-03 02:08:14,985 INFO L226 Difference]: Without dead ends: 11144 [2022-11-03 02:08:14,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:08:14,986 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 253 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:14,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 96 Invalid, 735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 664 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 02:08:15,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11144 states. [2022-11-03 02:08:15,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11144 to 7922. [2022-11-03 02:08:15,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7922 states, 7879 states have (on average 3.483944663028303) internal successors, (27450), 7921 states have internal predecessors, (27450), 0 states have call successors, (0), 0 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 02:08:15,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7922 states to 7922 states and 27450 transitions. [2022-11-03 02:08:15,222 INFO L78 Accepts]: Start accepts. Automaton has 7922 states and 27450 transitions. Word has length 22 [2022-11-03 02:08:15,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:15,223 INFO L495 AbstractCegarLoop]: Abstraction has 7922 states and 27450 transitions. [2022-11-03 02:08:15,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 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 02:08:15,223 INFO L276 IsEmpty]: Start isEmpty. Operand 7922 states and 27450 transitions. [2022-11-03 02:08:15,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-03 02:08:15,232 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:15,232 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:08:15,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-11-03 02:08:15,233 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting qrcu_updaterErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [qrcu_reader1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2022-11-03 02:08:15,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:15,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1735556474, now seen corresponding path program 5 times [2022-11-03 02:08:15,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:08:15,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711577696] [2022-11-03 02:08:15,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:15,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:08:15,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:15,531 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 02:08:15,531 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:08:15,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711577696] [2022-11-03 02:08:15,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711577696] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:08:15,532 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:08:15,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:08:15,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206215472] [2022-11-03 02:08:15,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:08:15,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 02:08:15,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:08:15,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 02:08:15,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:08:15,534 INFO L87 Difference]: Start difference. First operand 7922 states and 27450 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 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 02:08:16,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:16,301 INFO L93 Difference]: Finished difference Result 9590 states and 32831 transitions. [2022-11-03 02:08:16,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 02:08:16,302 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 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 22 [2022-11-03 02:08:16,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:16,331 INFO L225 Difference]: With dead ends: 9590 [2022-11-03 02:08:16,331 INFO L226 Difference]: Without dead ends: 9590 [2022-11-03 02:08:16,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:08:16,332 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 206 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 891 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 891 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:16,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 102 Invalid, 953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 891 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 02:08:16,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9590 states. [2022-11-03 02:08:16,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9590 to 8282. [2022-11-03 02:08:16,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8282 states, 8239 states have (on average 3.4948416069911397) internal successors, (28794), 8281 states have internal predecessors, (28794), 0 states have call successors, (0), 0 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 02:08:16,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8282 states to 8282 states and 28794 transitions. [2022-11-03 02:08:16,569 INFO L78 Accepts]: Start accepts. Automaton has 8282 states and 28794 transitions. Word has length 22 [2022-11-03 02:08:16,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:16,569 INFO L495 AbstractCegarLoop]: Abstraction has 8282 states and 28794 transitions. [2022-11-03 02:08:16,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 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 02:08:16,569 INFO L276 IsEmpty]: Start isEmpty. Operand 8282 states and 28794 transitions. [2022-11-03 02:08:16,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-03 02:08:16,579 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:16,579 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:08:16,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-11-03 02:08:16,579 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting qrcu_updaterErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [qrcu_reader1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2022-11-03 02:08:16,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:16,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1758793454, now seen corresponding path program 6 times [2022-11-03 02:08:16,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:08:16,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257420189] [2022-11-03 02:08:16,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:16,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:08:16,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:16,822 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 02:08:16,822 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:08:16,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257420189] [2022-11-03 02:08:16,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257420189] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:08:16,822 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:08:16,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:08:16,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282376047] [2022-11-03 02:08:16,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:08:16,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:08:16,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:08:16,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:08:16,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:08:16,824 INFO L87 Difference]: Start difference. First operand 8282 states and 28794 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 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 02:08:17,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:17,498 INFO L93 Difference]: Finished difference Result 9512 states and 34970 transitions. [2022-11-03 02:08:17,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 02:08:17,498 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 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 22 [2022-11-03 02:08:17,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:17,532 INFO L225 Difference]: With dead ends: 9512 [2022-11-03 02:08:17,532 INFO L226 Difference]: Without dead ends: 9512 [2022-11-03 02:08:17,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:08:17,533 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 202 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 712 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:17,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 66 Invalid, 789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 712 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:08:17,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9512 states. [2022-11-03 02:08:17,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9512 to 7356. [2022-11-03 02:08:17,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7356 states, 7315 states have (on average 3.5460013670539987) internal successors, (25939), 7355 states have internal predecessors, (25939), 0 states have call successors, (0), 0 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 02:08:17,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7356 states to 7356 states and 25939 transitions. [2022-11-03 02:08:17,747 INFO L78 Accepts]: Start accepts. Automaton has 7356 states and 25939 transitions. Word has length 22 [2022-11-03 02:08:17,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:17,747 INFO L495 AbstractCegarLoop]: Abstraction has 7356 states and 25939 transitions. [2022-11-03 02:08:17,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 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 02:08:17,748 INFO L276 IsEmpty]: Start isEmpty. Operand 7356 states and 25939 transitions. [2022-11-03 02:08:17,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-03 02:08:17,757 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:17,757 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:08:17,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-11-03 02:08:17,758 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting qrcu_updaterErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [qrcu_reader1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2022-11-03 02:08:17,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:17,758 INFO L85 PathProgramCache]: Analyzing trace with hash -942073147, now seen corresponding path program 1 times [2022-11-03 02:08:17,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:08:17,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395697764] [2022-11-03 02:08:17,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:17,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:08:17,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:18,003 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 02:08:18,003 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:08:18,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395697764] [2022-11-03 02:08:18,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395697764] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:08:18,004 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:08:18,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:08:18,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820551540] [2022-11-03 02:08:18,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:08:18,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:08:18,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:08:18,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:08:18,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:08:18,006 INFO L87 Difference]: Start difference. First operand 7356 states and 25939 transitions. Second operand has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 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 02:08:18,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:18,760 INFO L93 Difference]: Finished difference Result 8818 states and 32056 transitions. [2022-11-03 02:08:18,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 02:08:18,761 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 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 22 [2022-11-03 02:08:18,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:18,804 INFO L225 Difference]: With dead ends: 8818 [2022-11-03 02:08:18,805 INFO L226 Difference]: Without dead ends: 8818 [2022-11-03 02:08:18,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2022-11-03 02:08:18,808 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 246 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:18,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 60 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 628 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:08:18,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8818 states. [2022-11-03 02:08:19,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8818 to 7356. [2022-11-03 02:08:19,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7356 states, 7315 states have (on average 3.5460013670539987) internal successors, (25939), 7355 states have internal predecessors, (25939), 0 states have call successors, (0), 0 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 02:08:19,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7356 states to 7356 states and 25939 transitions. [2022-11-03 02:08:19,106 INFO L78 Accepts]: Start accepts. Automaton has 7356 states and 25939 transitions. Word has length 22 [2022-11-03 02:08:19,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:19,106 INFO L495 AbstractCegarLoop]: Abstraction has 7356 states and 25939 transitions. [2022-11-03 02:08:19,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 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 02:08:19,107 INFO L276 IsEmpty]: Start isEmpty. Operand 7356 states and 25939 transitions. [2022-11-03 02:08:19,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-03 02:08:19,119 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:19,119 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:08:19,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-11-03 02:08:19,120 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting qrcu_updaterErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [qrcu_reader1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2022-11-03 02:08:19,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:19,121 INFO L85 PathProgramCache]: Analyzing trace with hash -61930563, now seen corresponding path program 2 times [2022-11-03 02:08:19,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:08:19,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691682581] [2022-11-03 02:08:19,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:19,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:08:19,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:19,358 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 02:08:19,359 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:08:19,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691682581] [2022-11-03 02:08:19,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691682581] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:08:19,359 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:08:19,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:08:19,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617168781] [2022-11-03 02:08:19,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:08:19,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:08:19,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:08:19,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:08:19,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:08:19,362 INFO L87 Difference]: Start difference. First operand 7356 states and 25939 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 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 02:08:20,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:20,145 INFO L93 Difference]: Finished difference Result 12718 states and 44783 transitions. [2022-11-03 02:08:20,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 02:08:20,146 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 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 22 [2022-11-03 02:08:20,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:20,192 INFO L225 Difference]: With dead ends: 12718 [2022-11-03 02:08:20,192 INFO L226 Difference]: Without dead ends: 12718 [2022-11-03 02:08:20,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:08:20,193 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 212 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:20,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 123 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 758 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 02:08:20,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12718 states. [2022-11-03 02:08:20,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12718 to 8146. [2022-11-03 02:08:20,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8146 states, 8105 states have (on average 3.5962985811227637) internal successors, (29148), 8145 states have internal predecessors, (29148), 0 states have call successors, (0), 0 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 02:08:20,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8146 states to 8146 states and 29148 transitions. [2022-11-03 02:08:20,471 INFO L78 Accepts]: Start accepts. Automaton has 8146 states and 29148 transitions. Word has length 22 [2022-11-03 02:08:20,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:20,471 INFO L495 AbstractCegarLoop]: Abstraction has 8146 states and 29148 transitions. [2022-11-03 02:08:20,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 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 02:08:20,472 INFO L276 IsEmpty]: Start isEmpty. Operand 8146 states and 29148 transitions. [2022-11-03 02:08:20,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-03 02:08:20,485 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:20,485 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:08:20,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-11-03 02:08:20,486 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting qrcu_updaterErr11ASSERT_VIOLATIONINTEGER_OVERFLOW === [qrcu_reader1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2022-11-03 02:08:20,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:20,487 INFO L85 PathProgramCache]: Analyzing trace with hash -907997534, now seen corresponding path program 1 times [2022-11-03 02:08:20,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:08:20,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628847836] [2022-11-03 02:08:20,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:20,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:08:20,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:20,585 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 02:08:20,586 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:08:20,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628847836] [2022-11-03 02:08:20,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628847836] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:08:20,586 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:08:20,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:08:20,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140905787] [2022-11-03 02:08:20,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:08:20,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:08:20,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:08:20,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:08:20,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:08:20,588 INFO L87 Difference]: Start difference. First operand 8146 states and 29148 transitions. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 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 02:08:20,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:20,946 INFO L93 Difference]: Finished difference Result 9354 states and 32525 transitions. [2022-11-03 02:08:20,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:08:20,947 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 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 22 [2022-11-03 02:08:20,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:20,992 INFO L225 Difference]: With dead ends: 9354 [2022-11-03 02:08:20,992 INFO L226 Difference]: Without dead ends: 8958 [2022-11-03 02:08:20,993 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 02:08:20,994 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 140 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:20,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 73 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:08:21,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8958 states. [2022-11-03 02:08:21,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8958 to 8480. [2022-11-03 02:08:21,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8480 states, 8449 states have (on average 3.547165345011244) internal successors, (29970), 8479 states have internal predecessors, (29970), 0 states have call successors, (0), 0 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 02:08:21,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8480 states to 8480 states and 29970 transitions. [2022-11-03 02:08:21,223 INFO L78 Accepts]: Start accepts. Automaton has 8480 states and 29970 transitions. Word has length 22 [2022-11-03 02:08:21,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:21,224 INFO L495 AbstractCegarLoop]: Abstraction has 8480 states and 29970 transitions. [2022-11-03 02:08:21,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 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 02:08:21,224 INFO L276 IsEmpty]: Start isEmpty. Operand 8480 states and 29970 transitions. [2022-11-03 02:08:21,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-03 02:08:21,231 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:21,231 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:08:21,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-11-03 02:08:21,232 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting qrcu_updaterErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [qrcu_reader1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2022-11-03 02:08:21,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:21,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1830814987, now seen corresponding path program 3 times [2022-11-03 02:08:21,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:08:21,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744409660] [2022-11-03 02:08:21,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:21,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:08:21,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:21,434 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 02:08:21,435 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:08:21,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744409660] [2022-11-03 02:08:21,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744409660] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:08:21,435 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:08:21,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:08:21,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483903418] [2022-11-03 02:08:21,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:08:21,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:08:21,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:08:21,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:08:21,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:08:21,437 INFO L87 Difference]: Start difference. First operand 8480 states and 29970 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 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 02:08:22,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:22,059 INFO L93 Difference]: Finished difference Result 10974 states and 39559 transitions. [2022-11-03 02:08:22,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 02:08:22,059 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 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 22 [2022-11-03 02:08:22,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:22,089 INFO L225 Difference]: With dead ends: 10974 [2022-11-03 02:08:22,089 INFO L226 Difference]: Without dead ends: 10950 [2022-11-03 02:08:22,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:08:22,090 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 198 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:22,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 110 Invalid, 830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 791 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:08:22,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10950 states. [2022-11-03 02:08:22,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10950 to 7772. [2022-11-03 02:08:22,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7772 states, 7741 states have (on average 3.5671101924815916) internal successors, (27613), 7771 states have internal predecessors, (27613), 0 states have call successors, (0), 0 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 02:08:22,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7772 states to 7772 states and 27613 transitions. [2022-11-03 02:08:22,256 INFO L78 Accepts]: Start accepts. Automaton has 7772 states and 27613 transitions. Word has length 22 [2022-11-03 02:08:22,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:22,257 INFO L495 AbstractCegarLoop]: Abstraction has 7772 states and 27613 transitions. [2022-11-03 02:08:22,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 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 02:08:22,257 INFO L276 IsEmpty]: Start isEmpty. Operand 7772 states and 27613 transitions. [2022-11-03 02:08:22,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-03 02:08:22,265 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:22,266 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:08:22,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-11-03 02:08:22,266 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting qrcu_updaterErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [qrcu_reader1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2022-11-03 02:08:22,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:22,267 INFO L85 PathProgramCache]: Analyzing trace with hash -909326747, now seen corresponding path program 4 times [2022-11-03 02:08:22,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:08:22,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739433470] [2022-11-03 02:08:22,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:22,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:08:22,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:22,457 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 02:08:22,457 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:08:22,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739433470] [2022-11-03 02:08:22,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739433470] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:08:22,458 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:08:22,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:08:22,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710091009] [2022-11-03 02:08:22,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:08:22,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:08:22,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:08:22,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:08:22,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:08:22,459 INFO L87 Difference]: Start difference. First operand 7772 states and 27613 transitions. Second operand has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 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 02:08:23,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:23,183 INFO L93 Difference]: Finished difference Result 10288 states and 36483 transitions. [2022-11-03 02:08:23,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 02:08:23,184 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 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 22 [2022-11-03 02:08:23,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:23,215 INFO L225 Difference]: With dead ends: 10288 [2022-11-03 02:08:23,215 INFO L226 Difference]: Without dead ends: 10264 [2022-11-03 02:08:23,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:08:23,216 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 158 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 809 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:23,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 93 Invalid, 840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 809 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 02:08:23,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10264 states. [2022-11-03 02:08:23,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10264 to 7496. [2022-11-03 02:08:23,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7496 states, 7467 states have (on average 3.531404847997857) internal successors, (26369), 7495 states have internal predecessors, (26369), 0 states have call successors, (0), 0 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 02:08:23,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7496 states to 7496 states and 26369 transitions. [2022-11-03 02:08:23,444 INFO L78 Accepts]: Start accepts. Automaton has 7496 states and 26369 transitions. Word has length 22 [2022-11-03 02:08:23,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:23,444 INFO L495 AbstractCegarLoop]: Abstraction has 7496 states and 26369 transitions. [2022-11-03 02:08:23,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 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 02:08:23,445 INFO L276 IsEmpty]: Start isEmpty. Operand 7496 states and 26369 transitions. [2022-11-03 02:08:23,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-03 02:08:23,453 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:23,453 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:08:23,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-11-03 02:08:23,453 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting qrcu_reader1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [qrcu_reader1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2022-11-03 02:08:23,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:23,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1914416326, now seen corresponding path program 1 times [2022-11-03 02:08:23,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:08:23,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381444421] [2022-11-03 02:08:23,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:23,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:08:23,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:23,538 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 02:08:23,538 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:08:23,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381444421] [2022-11-03 02:08:23,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381444421] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:08:23,538 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:08:23,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:08:23,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749298625] [2022-11-03 02:08:23,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:08:23,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:08:23,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:08:23,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:08:23,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:08:23,540 INFO L87 Difference]: Start difference. First operand 7496 states and 26369 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 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 02:08:23,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:23,958 INFO L93 Difference]: Finished difference Result 8248 states and 28304 transitions. [2022-11-03 02:08:23,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:08:23,958 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 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 23 [2022-11-03 02:08:23,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:23,984 INFO L225 Difference]: With dead ends: 8248 [2022-11-03 02:08:23,984 INFO L226 Difference]: Without dead ends: 8032 [2022-11-03 02:08:23,984 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:08:23,984 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 213 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:23,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 91 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:08:24,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8032 states. [2022-11-03 02:08:24,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8032 to 7558. [2022-11-03 02:08:24,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7558 states, 7537 states have (on average 3.5138649329972136) internal successors, (26484), 7557 states have internal predecessors, (26484), 0 states have call successors, (0), 0 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 02:08:24,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7558 states to 7558 states and 26484 transitions. [2022-11-03 02:08:24,198 INFO L78 Accepts]: Start accepts. Automaton has 7558 states and 26484 transitions. Word has length 23 [2022-11-03 02:08:24,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:24,199 INFO L495 AbstractCegarLoop]: Abstraction has 7558 states and 26484 transitions. [2022-11-03 02:08:24,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 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 02:08:24,199 INFO L276 IsEmpty]: Start isEmpty. Operand 7558 states and 26484 transitions. [2022-11-03 02:08:24,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-03 02:08:24,208 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:24,208 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:08:24,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-11-03 02:08:24,208 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting qrcu_reader1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [qrcu_reader1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2022-11-03 02:08:24,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:24,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1914416327, now seen corresponding path program 1 times [2022-11-03 02:08:24,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:08:24,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241935245] [2022-11-03 02:08:24,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:24,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:08:24,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:24,300 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 02:08:24,300 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:08:24,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241935245] [2022-11-03 02:08:24,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241935245] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:08:24,301 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:08:24,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:08:24,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125660837] [2022-11-03 02:08:24,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:08:24,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:08:24,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:08:24,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:08:24,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:08:24,303 INFO L87 Difference]: Start difference. First operand 7558 states and 26484 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 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 02:08:24,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:24,762 INFO L93 Difference]: Finished difference Result 7934 states and 26485 transitions. [2022-11-03 02:08:24,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:08:24,763 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 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 23 [2022-11-03 02:08:24,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:24,795 INFO L225 Difference]: With dead ends: 7934 [2022-11-03 02:08:24,795 INFO L226 Difference]: Without dead ends: 7230 [2022-11-03 02:08:24,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:08:24,796 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 238 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:24,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 101 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:08:24,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7230 states. [2022-11-03 02:08:24,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7230 to 6432. [2022-11-03 02:08:25,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6432 states, 6418 states have (on average 3.41025241508258) internal successors, (21887), 6431 states have internal predecessors, (21887), 0 states have call successors, (0), 0 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 02:08:25,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6432 states to 6432 states and 21887 transitions. [2022-11-03 02:08:25,040 INFO L78 Accepts]: Start accepts. Automaton has 6432 states and 21887 transitions. Word has length 23 [2022-11-03 02:08:25,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:25,040 INFO L495 AbstractCegarLoop]: Abstraction has 6432 states and 21887 transitions. [2022-11-03 02:08:25,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 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 02:08:25,041 INFO L276 IsEmpty]: Start isEmpty. Operand 6432 states and 21887 transitions. [2022-11-03 02:08:25,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-03 02:08:25,053 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:25,053 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:08:25,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-11-03 02:08:25,053 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting qrcu_reader2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [qrcu_reader1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2022-11-03 02:08:25,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:25,055 INFO L85 PathProgramCache]: Analyzing trace with hash 902405649, now seen corresponding path program 1 times [2022-11-03 02:08:25,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:08:25,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605447283] [2022-11-03 02:08:25,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:25,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:08:25,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:25,201 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 02:08:25,201 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:08:25,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605447283] [2022-11-03 02:08:25,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605447283] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:08:25,202 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:08:25,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:08:25,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179800099] [2022-11-03 02:08:25,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:08:25,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:08:25,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:08:25,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:08:25,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:08:25,204 INFO L87 Difference]: Start difference. First operand 6432 states and 21887 transitions. Second operand has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 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 02:08:25,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:25,600 INFO L93 Difference]: Finished difference Result 6998 states and 23875 transitions. [2022-11-03 02:08:25,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 02:08:25,600 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 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 24 [2022-11-03 02:08:25,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:25,619 INFO L225 Difference]: With dead ends: 6998 [2022-11-03 02:08:25,619 INFO L226 Difference]: Without dead ends: 6998 [2022-11-03 02:08:25,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:08:25,622 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 239 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:25,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 100 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:08:25,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6998 states. [2022-11-03 02:08:25,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6998 to 6084. [2022-11-03 02:08:25,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6084 states, 6072 states have (on average 3.4161725955204214) internal successors, (20743), 6083 states have internal predecessors, (20743), 0 states have call successors, (0), 0 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 02:08:25,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6084 states to 6084 states and 20743 transitions. [2022-11-03 02:08:25,784 INFO L78 Accepts]: Start accepts. Automaton has 6084 states and 20743 transitions. Word has length 24 [2022-11-03 02:08:25,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:25,785 INFO L495 AbstractCegarLoop]: Abstraction has 6084 states and 20743 transitions. [2022-11-03 02:08:25,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 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 02:08:25,785 INFO L276 IsEmpty]: Start isEmpty. Operand 6084 states and 20743 transitions. [2022-11-03 02:08:25,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-03 02:08:25,793 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:25,794 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:08:25,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-11-03 02:08:25,794 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting qrcu_reader2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW === [qrcu_reader1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2022-11-03 02:08:25,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:25,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1494227694, now seen corresponding path program 1 times [2022-11-03 02:08:25,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:08:25,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203466946] [2022-11-03 02:08:25,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:25,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:08:25,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:25,844 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 02:08:25,844 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:08:25,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203466946] [2022-11-03 02:08:25,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203466946] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:08:25,845 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:08:25,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:08:25,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384506577] [2022-11-03 02:08:25,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:08:25,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:08:25,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:08:25,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:08:25,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:08:25,847 INFO L87 Difference]: Start difference. First operand 6084 states and 20743 transitions. Second operand has 3 states, 2 states have (on average 12.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 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 02:08:25,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:25,952 INFO L93 Difference]: Finished difference Result 5958 states and 20323 transitions. [2022-11-03 02:08:25,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:08:25,953 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 12.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 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 24 [2022-11-03 02:08:25,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:25,969 INFO L225 Difference]: With dead ends: 5958 [2022-11-03 02:08:25,969 INFO L226 Difference]: Without dead ends: 5958 [2022-11-03 02:08:25,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 02:08:25,970 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 58 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:25,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 14 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:08:25,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5958 states. [2022-11-03 02:08:26,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5958 to 5652. [2022-11-03 02:08:26,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5652 states, 5642 states have (on average 3.4000354484225452) internal successors, (19183), 5651 states have internal predecessors, (19183), 0 states have call successors, (0), 0 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 02:08:26,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5652 states to 5652 states and 19183 transitions. [2022-11-03 02:08:26,116 INFO L78 Accepts]: Start accepts. Automaton has 5652 states and 19183 transitions. Word has length 24 [2022-11-03 02:08:26,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:26,116 INFO L495 AbstractCegarLoop]: Abstraction has 5652 states and 19183 transitions. [2022-11-03 02:08:26,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 12.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 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 02:08:26,116 INFO L276 IsEmpty]: Start isEmpty. Operand 5652 states and 19183 transitions. [2022-11-03 02:08:26,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-03 02:08:26,125 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:26,125 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:08:26,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-11-03 02:08:26,125 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting qrcu_reader2Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [qrcu_reader1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2022-11-03 02:08:26,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:26,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1494227693, now seen corresponding path program 1 times [2022-11-03 02:08:26,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:08:26,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156211252] [2022-11-03 02:08:26,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:26,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:08:26,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:26,224 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 02:08:26,224 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:08:26,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156211252] [2022-11-03 02:08:26,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156211252] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:08:26,225 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:08:26,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:08:26,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333303996] [2022-11-03 02:08:26,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:08:26,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:08:26,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:08:26,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:08:26,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:08:26,227 INFO L87 Difference]: Start difference. First operand 5652 states and 19183 transitions. Second operand has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 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 02:08:26,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:26,566 INFO L93 Difference]: Finished difference Result 6612 states and 21575 transitions. [2022-11-03 02:08:26,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:08:26,567 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 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 24 [2022-11-03 02:08:26,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:26,586 INFO L225 Difference]: With dead ends: 6612 [2022-11-03 02:08:26,586 INFO L226 Difference]: Without dead ends: 6360 [2022-11-03 02:08:26,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:08:26,587 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 130 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:26,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 119 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:08:26,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6360 states. [2022-11-03 02:08:26,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6360 to 5634. [2022-11-03 02:08:26,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5634 states, 5627 states have (on average 3.3349920028434337) internal successors, (18766), 5633 states have internal predecessors, (18766), 0 states have call successors, (0), 0 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 02:08:26,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5634 states to 5634 states and 18766 transitions. [2022-11-03 02:08:26,744 INFO L78 Accepts]: Start accepts. Automaton has 5634 states and 18766 transitions. Word has length 24 [2022-11-03 02:08:26,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:26,744 INFO L495 AbstractCegarLoop]: Abstraction has 5634 states and 18766 transitions. [2022-11-03 02:08:26,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 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 02:08:26,745 INFO L276 IsEmpty]: Start isEmpty. Operand 5634 states and 18766 transitions. [2022-11-03 02:08:26,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-03 02:08:26,754 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:26,754 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:08:26,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-11-03 02:08:26,755 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting qrcu_reader1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [qrcu_reader1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2022-11-03 02:08:26,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:26,755 INFO L85 PathProgramCache]: Analyzing trace with hash -744287068, now seen corresponding path program 1 times [2022-11-03 02:08:26,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:08:26,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27726567] [2022-11-03 02:08:26,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:26,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:08:26,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:26,839 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 02:08:26,840 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:08:26,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27726567] [2022-11-03 02:08:26,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27726567] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:08:26,840 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:08:26,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:08:26,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588410498] [2022-11-03 02:08:26,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:08:26,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:08:26,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:08:26,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:08:26,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:08:26,843 INFO L87 Difference]: Start difference. First operand 5634 states and 18766 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 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 02:08:27,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:27,163 INFO L93 Difference]: Finished difference Result 5676 states and 18626 transitions. [2022-11-03 02:08:27,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:08:27,164 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2022-11-03 02:08:27,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:27,185 INFO L225 Difference]: With dead ends: 5676 [2022-11-03 02:08:27,185 INFO L226 Difference]: Without dead ends: 5052 [2022-11-03 02:08:27,185 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:08:27,186 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 194 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:27,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 68 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:08:27,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5052 states. [2022-11-03 02:08:27,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5052 to 4374. [2022-11-03 02:08:27,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4374 states, 4369 states have (on average 3.3842984664682993) internal successors, (14786), 4373 states have internal predecessors, (14786), 0 states have call successors, (0), 0 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 02:08:27,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4374 states to 4374 states and 14786 transitions. [2022-11-03 02:08:27,343 INFO L78 Accepts]: Start accepts. Automaton has 4374 states and 14786 transitions. Word has length 26 [2022-11-03 02:08:27,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:27,344 INFO L495 AbstractCegarLoop]: Abstraction has 4374 states and 14786 transitions. [2022-11-03 02:08:27,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 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 02:08:27,344 INFO L276 IsEmpty]: Start isEmpty. Operand 4374 states and 14786 transitions. [2022-11-03 02:08:27,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-03 02:08:27,356 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:27,356 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:08:27,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-11-03 02:08:27,356 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting qrcu_reader2Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [qrcu_reader1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2022-11-03 02:08:27,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:27,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1830066255, now seen corresponding path program 1 times [2022-11-03 02:08:27,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:08:27,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269501987] [2022-11-03 02:08:27,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:27,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:08:27,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:27,497 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 02:08:27,497 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:08:27,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269501987] [2022-11-03 02:08:27,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269501987] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:08:27,498 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:08:27,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:08:27,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274298888] [2022-11-03 02:08:27,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:08:27,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:08:27,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:08:27,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:08:27,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:08:27,500 INFO L87 Difference]: Start difference. First operand 4374 states and 14786 transitions. Second operand has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 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 02:08:27,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:27,880 INFO L93 Difference]: Finished difference Result 5214 states and 16944 transitions. [2022-11-03 02:08:27,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:08:27,881 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 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 27 [2022-11-03 02:08:27,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:27,899 INFO L225 Difference]: With dead ends: 5214 [2022-11-03 02:08:27,900 INFO L226 Difference]: Without dead ends: 4836 [2022-11-03 02:08:27,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:08:27,900 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 189 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:27,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 83 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:08:27,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4836 states. [2022-11-03 02:08:28,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4836 to 3990. [2022-11-03 02:08:28,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3990 states, 3985 states have (on average 3.3590966122961103) internal successors, (13386), 3989 states have internal predecessors, (13386), 0 states have call successors, (0), 0 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 02:08:28,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3990 states to 3990 states and 13386 transitions. [2022-11-03 02:08:28,056 INFO L78 Accepts]: Start accepts. Automaton has 3990 states and 13386 transitions. Word has length 27 [2022-11-03 02:08:28,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:28,057 INFO L495 AbstractCegarLoop]: Abstraction has 3990 states and 13386 transitions. [2022-11-03 02:08:28,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 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 02:08:28,057 INFO L276 IsEmpty]: Start isEmpty. Operand 3990 states and 13386 transitions. [2022-11-03 02:08:28,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-03 02:08:28,065 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:28,066 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:08:28,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-11-03 02:08:28,066 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting qrcu_reader2Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [qrcu_reader1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2022-11-03 02:08:28,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:28,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1384029935, now seen corresponding path program 2 times [2022-11-03 02:08:28,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:08:28,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993076024] [2022-11-03 02:08:28,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:28,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:08:28,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:28,216 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 02:08:28,217 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:08:28,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993076024] [2022-11-03 02:08:28,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993076024] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:08:28,217 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:08:28,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:08:28,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061908783] [2022-11-03 02:08:28,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:08:28,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:08:28,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:08:28,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:08:28,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:08:28,219 INFO L87 Difference]: Start difference. First operand 3990 states and 13386 transitions. Second operand has 7 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 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 02:08:28,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:28,674 INFO L93 Difference]: Finished difference Result 4632 states and 15492 transitions. [2022-11-03 02:08:28,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 02:08:28,675 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 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 27 [2022-11-03 02:08:28,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:28,687 INFO L225 Difference]: With dead ends: 4632 [2022-11-03 02:08:28,687 INFO L226 Difference]: Without dead ends: 4532 [2022-11-03 02:08:28,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:08:28,687 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 233 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:28,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 131 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:08:28,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4532 states. [2022-11-03 02:08:28,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4532 to 3698. [2022-11-03 02:08:28,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3698 states, 3694 states have (on average 3.383595018949648) internal successors, (12499), 3697 states have internal predecessors, (12499), 0 states have call successors, (0), 0 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 02:08:28,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3698 states to 3698 states and 12499 transitions. [2022-11-03 02:08:28,789 INFO L78 Accepts]: Start accepts. Automaton has 3698 states and 12499 transitions. Word has length 27 [2022-11-03 02:08:28,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:28,789 INFO L495 AbstractCegarLoop]: Abstraction has 3698 states and 12499 transitions. [2022-11-03 02:08:28,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 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 02:08:28,789 INFO L276 IsEmpty]: Start isEmpty. Operand 3698 states and 12499 transitions. [2022-11-03 02:08:28,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-03 02:08:28,797 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:28,797 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:08:28,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-11-03 02:08:28,798 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting qrcu_reader1Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [qrcu_reader1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2022-11-03 02:08:28,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:28,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1077978438, now seen corresponding path program 1 times [2022-11-03 02:08:28,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:08:28,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786464228] [2022-11-03 02:08:28,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:28,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:08:28,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:28,962 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 02:08:28,963 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:08:28,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786464228] [2022-11-03 02:08:28,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786464228] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:08:28,963 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:08:28,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:08:28,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67619772] [2022-11-03 02:08:28,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:08:28,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:08:28,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:08:28,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:08:28,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:08:28,965 INFO L87 Difference]: Start difference. First operand 3698 states and 12499 transitions. Second operand has 7 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 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 02:08:29,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:29,486 INFO L93 Difference]: Finished difference Result 4470 states and 15021 transitions. [2022-11-03 02:08:29,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 02:08:29,486 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 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 27 [2022-11-03 02:08:29,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:29,503 INFO L225 Difference]: With dead ends: 4470 [2022-11-03 02:08:29,503 INFO L226 Difference]: Without dead ends: 4420 [2022-11-03 02:08:29,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:08:29,504 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 198 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:29,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 137 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:08:29,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4420 states. [2022-11-03 02:08:29,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4420 to 3552. [2022-11-03 02:08:29,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3552 states, 3549 states have (on average 3.407156945618484) internal successors, (12092), 3551 states have internal predecessors, (12092), 0 states have call successors, (0), 0 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 02:08:29,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3552 states to 3552 states and 12092 transitions. [2022-11-03 02:08:29,637 INFO L78 Accepts]: Start accepts. Automaton has 3552 states and 12092 transitions. Word has length 27 [2022-11-03 02:08:29,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:29,637 INFO L495 AbstractCegarLoop]: Abstraction has 3552 states and 12092 transitions. [2022-11-03 02:08:29,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 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 02:08:29,638 INFO L276 IsEmpty]: Start isEmpty. Operand 3552 states and 12092 transitions. [2022-11-03 02:08:29,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-03 02:08:29,649 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:29,649 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:08:29,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-11-03 02:08:29,650 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting qrcu_updaterErr11ASSERT_VIOLATIONINTEGER_OVERFLOW === [qrcu_reader1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, qrcu_reader1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (and 64 more)] === [2022-11-03 02:08:29,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:29,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1259496444, now seen corresponding path program 1 times [2022-11-03 02:08:29,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:08:29,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540057024] [2022-11-03 02:08:29,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:29,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:08:29,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:29,836 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 02:08:29,837 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:08:29,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540057024] [2022-11-03 02:08:29,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540057024] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:08:29,837 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:08:29,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:08:29,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990003919] [2022-11-03 02:08:29,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:08:29,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:08:29,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:08:29,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:08:29,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:08:29,838 INFO L87 Difference]: Start difference. First operand 3552 states and 12092 transitions. Second operand has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 02:08:30,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:30,147 INFO L93 Difference]: Finished difference Result 5558 states and 18643 transitions. [2022-11-03 02:08:30,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:08:30,148 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 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 28 [2022-11-03 02:08:30,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:30,163 INFO L225 Difference]: With dead ends: 5558 [2022-11-03 02:08:30,163 INFO L226 Difference]: Without dead ends: 5424 [2022-11-03 02:08:30,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:08:30,164 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 238 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:30,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 90 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:08:30,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5424 states.