./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2018/Problem10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f8cd0a2-af9b-4d1d-92b6-9b2df2c26349/bin/uautomizer-QkZJyEgLgS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f8cd0a2-af9b-4d1d-92b6-9b2df2c26349/bin/uautomizer-QkZJyEgLgS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f8cd0a2-af9b-4d1d-92b6-9b2df2c26349/bin/uautomizer-QkZJyEgLgS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f8cd0a2-af9b-4d1d-92b6-9b2df2c26349/bin/uautomizer-QkZJyEgLgS/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2018/Problem10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f8cd0a2-af9b-4d1d-92b6-9b2df2c26349/bin/uautomizer-QkZJyEgLgS/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f8cd0a2-af9b-4d1d-92b6-9b2df2c26349/bin/uautomizer-QkZJyEgLgS --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash aec1fafbe63132c51323898caadb7f7b777fc751b19e58e74eab1930ebd68833 --- 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-4e7fbc6 [2022-11-23 03:13:45,434 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 03:13:45,436 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 03:13:45,476 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 03:13:45,477 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 03:13:45,478 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 03:13:45,485 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 03:13:45,489 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 03:13:45,491 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 03:13:45,499 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 03:13:45,500 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 03:13:45,503 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 03:13:45,503 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 03:13:45,510 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 03:13:45,511 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 03:13:45,512 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 03:13:45,513 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 03:13:45,514 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 03:13:45,516 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 03:13:45,518 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 03:13:45,519 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 03:13:45,529 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 03:13:45,531 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 03:13:45,532 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 03:13:45,544 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 03:13:45,544 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 03:13:45,544 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 03:13:45,547 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 03:13:45,547 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 03:13:45,548 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 03:13:45,548 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 03:13:45,549 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 03:13:45,551 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 03:13:45,553 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 03:13:45,554 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 03:13:45,554 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 03:13:45,556 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 03:13:45,556 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 03:13:45,556 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 03:13:45,557 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 03:13:45,558 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 03:13:45,559 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f8cd0a2-af9b-4d1d-92b6-9b2df2c26349/bin/uautomizer-QkZJyEgLgS/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-23 03:13:45,606 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 03:13:45,607 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 03:13:45,607 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 03:13:45,608 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 03:13:45,609 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 03:13:45,609 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 03:13:45,610 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 03:13:45,610 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 03:13:45,610 INFO L138 SettingsManager]: * Use SBE=true [2022-11-23 03:13:45,610 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 03:13:45,612 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 03:13:45,612 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 03:13:45,612 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 03:13:45,612 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 03:13:45,613 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 03:13:45,613 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 03:13:45,613 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 03:13:45,613 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 03:13:45,613 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 03:13:45,614 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 03:13:45,614 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 03:13:45,614 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 03:13:45,614 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-23 03:13:45,614 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 03:13:45,615 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 03:13:45,615 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 03:13:45,615 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 03:13:45,615 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 03:13:45,616 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-23 03:13:45,616 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 03:13:45,616 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-23 03:13:45,616 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 03:13:45,617 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-23 03:13:45,617 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-23 03:13:45,617 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f8cd0a2-af9b-4d1d-92b6-9b2df2c26349/bin/uautomizer-QkZJyEgLgS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f8cd0a2-af9b-4d1d-92b6-9b2df2c26349/bin/uautomizer-QkZJyEgLgS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aec1fafbe63132c51323898caadb7f7b777fc751b19e58e74eab1930ebd68833 [2022-11-23 03:13:45,920 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 03:13:45,957 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 03:13:45,960 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 03:13:45,961 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 03:13:45,962 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 03:13:45,963 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f8cd0a2-af9b-4d1d-92b6-9b2df2c26349/bin/uautomizer-QkZJyEgLgS/../../sv-benchmarks/c/eca-rers2018/Problem10.c [2022-11-23 03:13:49,121 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 03:13:49,504 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 03:13:49,505 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f8cd0a2-af9b-4d1d-92b6-9b2df2c26349/sv-benchmarks/c/eca-rers2018/Problem10.c [2022-11-23 03:13:49,527 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f8cd0a2-af9b-4d1d-92b6-9b2df2c26349/bin/uautomizer-QkZJyEgLgS/data/9b67e5aa4/7fdc1eacc593404e8f1e6e4f84233296/FLAG74bdad626 [2022-11-23 03:13:49,543 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f8cd0a2-af9b-4d1d-92b6-9b2df2c26349/bin/uautomizer-QkZJyEgLgS/data/9b67e5aa4/7fdc1eacc593404e8f1e6e4f84233296 [2022-11-23 03:13:49,546 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 03:13:49,547 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 03:13:49,549 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 03:13:49,549 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 03:13:49,556 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 03:13:49,557 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:13:49" (1/1) ... [2022-11-23 03:13:49,558 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e27869f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:13:49, skipping insertion in model container [2022-11-23 03:13:49,558 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:13:49" (1/1) ... [2022-11-23 03:13:49,567 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 03:13:49,631 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 03:13:49,774 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f8cd0a2-af9b-4d1d-92b6-9b2df2c26349/sv-benchmarks/c/eca-rers2018/Problem10.c[778,791] [2022-11-23 03:13:49,780 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f8cd0a2-af9b-4d1d-92b6-9b2df2c26349/sv-benchmarks/c/eca-rers2018/Problem10.c[817,830] [2022-11-23 03:13:50,367 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 03:13:50,402 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 03:13:50,418 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f8cd0a2-af9b-4d1d-92b6-9b2df2c26349/sv-benchmarks/c/eca-rers2018/Problem10.c[778,791] [2022-11-23 03:13:50,419 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f8cd0a2-af9b-4d1d-92b6-9b2df2c26349/sv-benchmarks/c/eca-rers2018/Problem10.c[817,830] [2022-11-23 03:13:50,509 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 03:13:50,603 INFO L208 MainTranslator]: Completed translation [2022-11-23 03:13:50,603 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:13:50 WrapperNode [2022-11-23 03:13:50,603 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 03:13:50,605 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 03:13:50,605 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 03:13:50,605 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 03:13:50,613 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:13:50" (1/1) ... [2022-11-23 03:13:50,654 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:13:50" (1/1) ... [2022-11-23 03:13:50,720 INFO L138 Inliner]: procedures = 274, calls = 248, calls flagged for inlining = 144, calls inlined = 144, statements flattened = 865 [2022-11-23 03:13:50,721 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 03:13:50,730 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 03:13:50,731 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 03:13:50,731 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 03:13:50,741 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:13:50" (1/1) ... [2022-11-23 03:13:50,742 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:13:50" (1/1) ... [2022-11-23 03:13:50,757 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:13:50" (1/1) ... [2022-11-23 03:13:50,763 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:13:50" (1/1) ... [2022-11-23 03:13:50,802 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:13:50" (1/1) ... [2022-11-23 03:13:50,816 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:13:50" (1/1) ... [2022-11-23 03:13:50,822 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:13:50" (1/1) ... [2022-11-23 03:13:50,826 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:13:50" (1/1) ... [2022-11-23 03:13:50,857 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 03:13:50,858 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 03:13:50,858 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 03:13:50,859 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 03:13:50,860 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:13:50" (1/1) ... [2022-11-23 03:13:50,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 03:13:50,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f8cd0a2-af9b-4d1d-92b6-9b2df2c26349/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:13:50,899 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f8cd0a2-af9b-4d1d-92b6-9b2df2c26349/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 03:13:50,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f8cd0a2-af9b-4d1d-92b6-9b2df2c26349/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 03:13:50,957 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 03:13:50,958 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error_a [2022-11-23 03:13:50,959 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error_a [2022-11-23 03:13:50,961 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error_b [2022-11-23 03:13:50,961 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error_b [2022-11-23 03:13:50,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 03:13:50,962 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 03:13:50,962 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 03:13:51,120 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 03:13:51,122 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 03:13:52,490 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 03:13:52,505 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 03:13:52,505 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-23 03:13:52,508 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:13:52 BoogieIcfgContainer [2022-11-23 03:13:52,509 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 03:13:52,511 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 03:13:52,512 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 03:13:52,515 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 03:13:52,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:13:49" (1/3) ... [2022-11-23 03:13:52,516 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bed5163 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:13:52, skipping insertion in model container [2022-11-23 03:13:52,516 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:13:50" (2/3) ... [2022-11-23 03:13:52,517 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bed5163 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:13:52, skipping insertion in model container [2022-11-23 03:13:52,517 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:13:52" (3/3) ... [2022-11-23 03:13:52,519 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem10.c [2022-11-23 03:13:52,540 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 03:13:52,541 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-23 03:13:52,606 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 03:13:52,614 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@24391d67, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 03:13:52,614 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-23 03:13:52,621 INFO L276 IsEmpty]: Start isEmpty. Operand has 468 states, 363 states have (on average 1.5922865013774106) internal successors, (578), 365 states have internal predecessors, (578), 100 states have call successors, (100), 2 states have call predecessors, (100), 2 states have return successors, (100), 100 states have call predecessors, (100), 100 states have call successors, (100) [2022-11-23 03:13:52,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-23 03:13:52,631 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:13:52,632 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:13:52,633 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:13:52,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:13:52,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1184212657, now seen corresponding path program 1 times [2022-11-23 03:13:52,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:13:52,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125143776] [2022-11-23 03:13:52,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:13:52,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:13:52,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:13:52,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:13:52,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:13:52,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125143776] [2022-11-23 03:13:52,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125143776] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:13:52,933 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:13:52,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 03:13:52,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376716331] [2022-11-23 03:13:52,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:13:52,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 03:13:52,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:13:53,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 03:13:53,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 03:13:53,012 INFO L87 Difference]: Start difference. First operand has 468 states, 363 states have (on average 1.5922865013774106) internal successors, (578), 365 states have internal predecessors, (578), 100 states have call successors, (100), 2 states have call predecessors, (100), 2 states have return successors, (100), 100 states have call predecessors, (100), 100 states have call successors, (100) Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:13:54,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:13:54,608 INFO L93 Difference]: Finished difference Result 1165 states and 2069 transitions. [2022-11-23 03:13:54,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 03:13:54,616 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-23 03:13:54,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:13:54,640 INFO L225 Difference]: With dead ends: 1165 [2022-11-23 03:13:54,643 INFO L226 Difference]: Without dead ends: 690 [2022-11-23 03:13:54,650 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 03:13:54,654 INFO L413 NwaCegarLoop]: 421 mSDtfsCounter, 395 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 1106 mSolverCounterSat, 232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 772 SdHoareTripleChecker+Invalid, 1338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 1106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-23 03:13:54,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [395 Valid, 772 Invalid, 1338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [232 Valid, 1106 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-23 03:13:54,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2022-11-23 03:13:54,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 557. [2022-11-23 03:13:54,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 455 states have (on average 1.589010989010989) internal successors, (723), 554 states have internal predecessors, (723), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:13:54,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 823 transitions. [2022-11-23 03:13:54,743 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 823 transitions. Word has length 13 [2022-11-23 03:13:54,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:13:54,743 INFO L495 AbstractCegarLoop]: Abstraction has 557 states and 823 transitions. [2022-11-23 03:13:54,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:13:54,744 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 823 transitions. [2022-11-23 03:13:54,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-23 03:13:54,745 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:13:54,745 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] [2022-11-23 03:13:54,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 03:13:54,746 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:13:54,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:13:54,747 INFO L85 PathProgramCache]: Analyzing trace with hash -249172658, now seen corresponding path program 1 times [2022-11-23 03:13:54,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:13:54,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848177503] [2022-11-23 03:13:54,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:13:54,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:13:54,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:13:54,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:13:54,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:13:54,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848177503] [2022-11-23 03:13:54,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848177503] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:13:54,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:13:54,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 03:13:54,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089756731] [2022-11-23 03:13:54,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:13:54,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 03:13:54,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:13:54,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 03:13:54,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 03:13:54,926 INFO L87 Difference]: Start difference. First operand 557 states and 823 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:13:55,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:13:55,827 INFO L93 Difference]: Finished difference Result 1704 states and 2582 transitions. [2022-11-23 03:13:55,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 03:13:55,830 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-23 03:13:55,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:13:55,834 INFO L225 Difference]: With dead ends: 1704 [2022-11-23 03:13:55,834 INFO L226 Difference]: Without dead ends: 1149 [2022-11-23 03:13:55,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 03:13:55,837 INFO L413 NwaCegarLoop]: 534 mSDtfsCounter, 866 mSDsluCounter, 582 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 866 SdHoareTripleChecker+Valid, 1116 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-23 03:13:55,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [866 Valid, 1116 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 656 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-23 03:13:55,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1149 states. [2022-11-23 03:13:55,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 888. [2022-11-23 03:13:55,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 786 states have (on average 1.5521628498727735) internal successors, (1220), 885 states have internal predecessors, (1220), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:13:55,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1320 transitions. [2022-11-23 03:13:55,878 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1320 transitions. Word has length 21 [2022-11-23 03:13:55,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:13:55,878 INFO L495 AbstractCegarLoop]: Abstraction has 888 states and 1320 transitions. [2022-11-23 03:13:55,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:13:55,879 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1320 transitions. [2022-11-23 03:13:55,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-23 03:13:55,880 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:13:55,880 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] [2022-11-23 03:13:55,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 03:13:55,880 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:13:55,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:13:55,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1086962958, now seen corresponding path program 1 times [2022-11-23 03:13:55,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:13:55,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124125708] [2022-11-23 03:13:55,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:13:55,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:13:55,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:13:56,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:13:56,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:13:56,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124125708] [2022-11-23 03:13:56,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124125708] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:13:56,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:13:56,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 03:13:56,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421661829] [2022-11-23 03:13:56,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:13:56,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:13:56,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:13:56,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:13:56,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:13:56,067 INFO L87 Difference]: Start difference. First operand 888 states and 1320 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:13:56,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:13:56,123 INFO L93 Difference]: Finished difference Result 2645 states and 3935 transitions. [2022-11-23 03:13:56,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:13:56,124 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-23 03:13:56,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:13:56,130 INFO L225 Difference]: With dead ends: 2645 [2022-11-23 03:13:56,131 INFO L226 Difference]: Without dead ends: 1759 [2022-11-23 03:13:56,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:13:56,140 INFO L413 NwaCegarLoop]: 690 mSDtfsCounter, 461 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 461 SdHoareTripleChecker+Valid, 1255 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 03:13:56,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [461 Valid, 1255 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 03:13:56,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1759 states. [2022-11-23 03:13:56,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1759 to 888. [2022-11-23 03:13:56,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 786 states have (on average 1.5508905852417303) internal successors, (1219), 885 states have internal predecessors, (1219), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:13:56,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1319 transitions. [2022-11-23 03:13:56,202 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1319 transitions. Word has length 24 [2022-11-23 03:13:56,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:13:56,202 INFO L495 AbstractCegarLoop]: Abstraction has 888 states and 1319 transitions. [2022-11-23 03:13:56,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:13:56,203 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1319 transitions. [2022-11-23 03:13:56,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-23 03:13:56,204 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:13:56,204 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] [2022-11-23 03:13:56,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 03:13:56,205 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:13:56,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:13:56,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1345128396, now seen corresponding path program 1 times [2022-11-23 03:13:56,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:13:56,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489448070] [2022-11-23 03:13:56,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:13:56,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:13:56,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:13:56,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:13:56,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:13:56,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489448070] [2022-11-23 03:13:56,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489448070] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:13:56,280 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:13:56,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 03:13:56,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437563960] [2022-11-23 03:13:56,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:13:56,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:13:56,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:13:56,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:13:56,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:13:56,284 INFO L87 Difference]: Start difference. First operand 888 states and 1319 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:13:56,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:13:56,517 INFO L93 Difference]: Finished difference Result 2201 states and 3265 transitions. [2022-11-23 03:13:56,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:13:56,518 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-23 03:13:56,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:13:56,523 INFO L225 Difference]: With dead ends: 2201 [2022-11-23 03:13:56,523 INFO L226 Difference]: Without dead ends: 1315 [2022-11-23 03:13:56,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:13:56,537 INFO L413 NwaCegarLoop]: 941 mSDtfsCounter, 533 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 533 SdHoareTripleChecker+Valid, 1382 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 03:13:56,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [533 Valid, 1382 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 03:13:56,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1315 states. [2022-11-23 03:13:56,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1315 to 1231. [2022-11-23 03:13:56,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1231 states, 1129 states have (on average 1.5491585473870682) internal successors, (1749), 1228 states have internal predecessors, (1749), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:13:56,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1231 states to 1231 states and 1849 transitions. [2022-11-23 03:13:56,581 INFO L78 Accepts]: Start accepts. Automaton has 1231 states and 1849 transitions. Word has length 24 [2022-11-23 03:13:56,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:13:56,582 INFO L495 AbstractCegarLoop]: Abstraction has 1231 states and 1849 transitions. [2022-11-23 03:13:56,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:13:56,583 INFO L276 IsEmpty]: Start isEmpty. Operand 1231 states and 1849 transitions. [2022-11-23 03:13:56,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-23 03:13:56,584 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:13:56,585 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] [2022-11-23 03:13:56,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 03:13:56,585 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:13:56,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:13:56,586 INFO L85 PathProgramCache]: Analyzing trace with hash 500156944, now seen corresponding path program 1 times [2022-11-23 03:13:56,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:13:56,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065272431] [2022-11-23 03:13:56,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:13:56,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:13:56,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:13:56,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:13:56,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:13:56,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065272431] [2022-11-23 03:13:56,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065272431] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:13:56,662 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:13:56,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 03:13:56,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522047499] [2022-11-23 03:13:56,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:13:56,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:13:56,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:13:56,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:13:56,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:13:56,665 INFO L87 Difference]: Start difference. First operand 1231 states and 1849 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:13:57,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:13:57,236 INFO L93 Difference]: Finished difference Result 3169 states and 4832 transitions. [2022-11-23 03:13:57,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:13:57,237 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-23 03:13:57,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:13:57,244 INFO L225 Difference]: With dead ends: 3169 [2022-11-23 03:13:57,245 INFO L226 Difference]: Without dead ends: 1940 [2022-11-23 03:13:57,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:13:57,248 INFO L413 NwaCegarLoop]: 656 mSDtfsCounter, 310 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 317 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 801 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 317 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 03:13:57,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [310 Valid, 801 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [317 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 03:13:57,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1940 states. [2022-11-23 03:13:57,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1940 to 1397. [2022-11-23 03:13:57,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1397 states, 1295 states have (on average 1.4517374517374517) internal successors, (1880), 1394 states have internal predecessors, (1880), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:13:57,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1397 states to 1397 states and 1980 transitions. [2022-11-23 03:13:57,295 INFO L78 Accepts]: Start accepts. Automaton has 1397 states and 1980 transitions. Word has length 24 [2022-11-23 03:13:57,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:13:57,296 INFO L495 AbstractCegarLoop]: Abstraction has 1397 states and 1980 transitions. [2022-11-23 03:13:57,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:13:57,296 INFO L276 IsEmpty]: Start isEmpty. Operand 1397 states and 1980 transitions. [2022-11-23 03:13:57,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-23 03:13:57,297 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:13:57,297 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] [2022-11-23 03:13:57,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 03:13:57,298 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:13:57,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:13:57,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1201221522, now seen corresponding path program 1 times [2022-11-23 03:13:57,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:13:57,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552125173] [2022-11-23 03:13:57,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:13:57,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:13:57,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:13:57,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:13:57,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:13:57,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552125173] [2022-11-23 03:13:57,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552125173] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:13:57,351 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:13:57,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 03:13:57,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764376336] [2022-11-23 03:13:57,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:13:57,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:13:57,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:13:57,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:13:57,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:13:57,353 INFO L87 Difference]: Start difference. First operand 1397 states and 1980 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:13:57,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:13:57,491 INFO L93 Difference]: Finished difference Result 4140 states and 5880 transitions. [2022-11-23 03:13:57,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:13:57,492 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-23 03:13:57,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:13:57,502 INFO L225 Difference]: With dead ends: 4140 [2022-11-23 03:13:57,502 INFO L226 Difference]: Without dead ends: 2745 [2022-11-23 03:13:57,505 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 [2022-11-23 03:13:57,506 INFO L413 NwaCegarLoop]: 550 mSDtfsCounter, 510 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 510 SdHoareTripleChecker+Valid, 1073 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 03:13:57,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [510 Valid, 1073 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 03:13:57,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2745 states. [2022-11-23 03:13:57,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2745 to 2657. [2022-11-23 03:13:57,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2657 states, 2555 states have (on average 1.4348336594911937) internal successors, (3666), 2654 states have internal predecessors, (3666), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:13:57,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2657 states to 2657 states and 3766 transitions. [2022-11-23 03:13:57,582 INFO L78 Accepts]: Start accepts. Automaton has 2657 states and 3766 transitions. Word has length 24 [2022-11-23 03:13:57,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:13:57,583 INFO L495 AbstractCegarLoop]: Abstraction has 2657 states and 3766 transitions. [2022-11-23 03:13:57,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:13:57,583 INFO L276 IsEmpty]: Start isEmpty. Operand 2657 states and 3766 transitions. [2022-11-23 03:13:57,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-23 03:13:57,584 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:13:57,584 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] [2022-11-23 03:13:57,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 03:13:57,584 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:13:57,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:13:57,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1417555436, now seen corresponding path program 1 times [2022-11-23 03:13:57,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:13:57,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516531372] [2022-11-23 03:13:57,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:13:57,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:13:57,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:13:57,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:13:57,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:13:57,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516531372] [2022-11-23 03:13:57,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516531372] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:13:57,622 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:13:57,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 03:13:57,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003234121] [2022-11-23 03:13:57,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:13:57,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:13:57,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:13:57,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:13:57,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:13:57,624 INFO L87 Difference]: Start difference. First operand 2657 states and 3766 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:13:58,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:13:58,294 INFO L93 Difference]: Finished difference Result 6143 states and 8908 transitions. [2022-11-23 03:13:58,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:13:58,295 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-23 03:13:58,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:13:58,306 INFO L225 Difference]: With dead ends: 6143 [2022-11-23 03:13:58,307 INFO L226 Difference]: Without dead ends: 3488 [2022-11-23 03:13:58,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:13:58,311 INFO L413 NwaCegarLoop]: 538 mSDtfsCounter, 230 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 722 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-23 03:13:58,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 722 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-23 03:13:58,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3488 states. [2022-11-23 03:13:58,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3488 to 3484. [2022-11-23 03:13:58,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3484 states, 3382 states have (on average 1.3746303962152573) internal successors, (4649), 3481 states have internal predecessors, (4649), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:13:58,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3484 states to 3484 states and 4749 transitions. [2022-11-23 03:13:58,414 INFO L78 Accepts]: Start accepts. Automaton has 3484 states and 4749 transitions. Word has length 25 [2022-11-23 03:13:58,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:13:58,449 INFO L495 AbstractCegarLoop]: Abstraction has 3484 states and 4749 transitions. [2022-11-23 03:13:58,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:13:58,450 INFO L276 IsEmpty]: Start isEmpty. Operand 3484 states and 4749 transitions. [2022-11-23 03:13:58,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-23 03:13:58,450 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:13:58,451 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] [2022-11-23 03:13:58,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-23 03:13:58,451 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:13:58,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:13:58,451 INFO L85 PathProgramCache]: Analyzing trace with hash 2032440408, now seen corresponding path program 1 times [2022-11-23 03:13:58,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:13:58,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661662104] [2022-11-23 03:13:58,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:13:58,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:13:58,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:13:58,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:13:58,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:13:58,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661662104] [2022-11-23 03:13:58,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661662104] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:13:58,510 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:13:58,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 03:13:58,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730496447] [2022-11-23 03:13:58,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:13:58,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:13:58,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:13:58,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:13:58,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:13:58,512 INFO L87 Difference]: Start difference. First operand 3484 states and 4749 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:13:59,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:13:59,181 INFO L93 Difference]: Finished difference Result 7813 states and 10890 transitions. [2022-11-23 03:13:59,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:13:59,181 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-23 03:13:59,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:13:59,195 INFO L225 Difference]: With dead ends: 7813 [2022-11-23 03:13:59,195 INFO L226 Difference]: Without dead ends: 4331 [2022-11-23 03:13:59,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:13:59,203 INFO L413 NwaCegarLoop]: 518 mSDtfsCounter, 299 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 682 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-23 03:13:59,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 682 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-23 03:13:59,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4331 states. [2022-11-23 03:13:59,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4331 to 4327. [2022-11-23 03:13:59,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4327 states, 4225 states have (on average 1.353846153846154) internal successors, (5720), 4324 states have internal predecessors, (5720), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:13:59,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4327 states to 4327 states and 5820 transitions. [2022-11-23 03:13:59,310 INFO L78 Accepts]: Start accepts. Automaton has 4327 states and 5820 transitions. Word has length 25 [2022-11-23 03:13:59,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:13:59,315 INFO L495 AbstractCegarLoop]: Abstraction has 4327 states and 5820 transitions. [2022-11-23 03:13:59,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:13:59,316 INFO L276 IsEmpty]: Start isEmpty. Operand 4327 states and 5820 transitions. [2022-11-23 03:13:59,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-23 03:13:59,318 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:13:59,318 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] [2022-11-23 03:13:59,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 03:13:59,318 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:13:59,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:13:59,319 INFO L85 PathProgramCache]: Analyzing trace with hash -995255721, now seen corresponding path program 1 times [2022-11-23 03:13:59,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:13:59,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400834663] [2022-11-23 03:13:59,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:13:59,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:13:59,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:13:59,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:13:59,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:13:59,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400834663] [2022-11-23 03:13:59,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400834663] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:13:59,370 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:13:59,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 03:13:59,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839735754] [2022-11-23 03:13:59,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:13:59,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:13:59,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:13:59,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:13:59,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:13:59,372 INFO L87 Difference]: Start difference. First operand 4327 states and 5820 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:13:59,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:13:59,488 INFO L93 Difference]: Finished difference Result 8549 states and 11509 transitions. [2022-11-23 03:13:59,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:13:59,489 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-23 03:13:59,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:13:59,515 INFO L225 Difference]: With dead ends: 8549 [2022-11-23 03:13:59,515 INFO L226 Difference]: Without dead ends: 8542 [2022-11-23 03:13:59,518 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:13:59,519 INFO L413 NwaCegarLoop]: 1005 mSDtfsCounter, 548 mSDsluCounter, 550 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 548 SdHoareTripleChecker+Valid, 1555 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 03:13:59,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [548 Valid, 1555 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 03:13:59,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8542 states. [2022-11-23 03:13:59,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8542 to 8441. [2022-11-23 03:13:59,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8441 states, 8339 states have (on average 1.3492025422712555) internal successors, (11251), 8438 states have internal predecessors, (11251), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:13:59,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8441 states to 8441 states and 11351 transitions. [2022-11-23 03:13:59,711 INFO L78 Accepts]: Start accepts. Automaton has 8441 states and 11351 transitions. Word has length 26 [2022-11-23 03:13:59,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:13:59,711 INFO L495 AbstractCegarLoop]: Abstraction has 8441 states and 11351 transitions. [2022-11-23 03:13:59,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:13:59,712 INFO L276 IsEmpty]: Start isEmpty. Operand 8441 states and 11351 transitions. [2022-11-23 03:13:59,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-23 03:13:59,712 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:13:59,712 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] [2022-11-23 03:13:59,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-23 03:13:59,713 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:13:59,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:13:59,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1419566957, now seen corresponding path program 1 times [2022-11-23 03:13:59,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:13:59,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542244711] [2022-11-23 03:13:59,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:13:59,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:13:59,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:13:59,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:13:59,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:13:59,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542244711] [2022-11-23 03:13:59,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542244711] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:13:59,760 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:13:59,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 03:13:59,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71967166] [2022-11-23 03:13:59,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:13:59,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:13:59,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:13:59,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:13:59,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:13:59,762 INFO L87 Difference]: Start difference. First operand 8441 states and 11351 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:13:59,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:13:59,929 INFO L93 Difference]: Finished difference Result 16979 states and 22797 transitions. [2022-11-23 03:13:59,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:13:59,930 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-23 03:13:59,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:13:59,963 INFO L225 Difference]: With dead ends: 16979 [2022-11-23 03:13:59,964 INFO L226 Difference]: Without dead ends: 8540 [2022-11-23 03:13:59,970 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 [2022-11-23 03:13:59,971 INFO L413 NwaCegarLoop]: 663 mSDtfsCounter, 533 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 533 SdHoareTripleChecker+Valid, 1209 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 03:13:59,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [533 Valid, 1209 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 03:13:59,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8540 states. [2022-11-23 03:14:00,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8540 to 8439. [2022-11-23 03:14:00,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8439 states, 8339 states have (on average 1.3441659671423432) internal successors, (11209), 8436 states have internal predecessors, (11209), 98 states have call successors, (98), 2 states have call predecessors, (98), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:14:00,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8439 states to 8439 states and 11307 transitions. [2022-11-23 03:14:00,185 INFO L78 Accepts]: Start accepts. Automaton has 8439 states and 11307 transitions. Word has length 26 [2022-11-23 03:14:00,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:14:00,187 INFO L495 AbstractCegarLoop]: Abstraction has 8439 states and 11307 transitions. [2022-11-23 03:14:00,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:14:00,188 INFO L276 IsEmpty]: Start isEmpty. Operand 8439 states and 11307 transitions. [2022-11-23 03:14:00,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-23 03:14:00,190 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:14:00,190 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] [2022-11-23 03:14:00,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-23 03:14:00,191 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:14:00,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:14:00,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1314457887, now seen corresponding path program 1 times [2022-11-23 03:14:00,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:14:00,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454005576] [2022-11-23 03:14:00,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:14:00,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:14:00,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:14:00,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:14:00,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:14:00,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454005576] [2022-11-23 03:14:00,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454005576] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:14:00,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:14:00,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 03:14:00,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107268517] [2022-11-23 03:14:00,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:14:00,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:14:00,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:14:00,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:14:00,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:14:00,253 INFO L87 Difference]: Start difference. First operand 8439 states and 11307 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:14:00,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:14:00,490 INFO L93 Difference]: Finished difference Result 25142 states and 33722 transitions. [2022-11-23 03:14:00,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:14:00,493 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-11-23 03:14:00,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:14:00,529 INFO L225 Difference]: With dead ends: 25142 [2022-11-23 03:14:00,529 INFO L226 Difference]: Without dead ends: 16705 [2022-11-23 03:14:00,541 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 [2022-11-23 03:14:00,542 INFO L413 NwaCegarLoop]: 562 mSDtfsCounter, 526 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 526 SdHoareTripleChecker+Valid, 1108 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 03:14:00,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [526 Valid, 1108 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 03:14:00,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16705 states. [2022-11-23 03:14:00,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16705 to 16607. [2022-11-23 03:14:00,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16607 states, 16507 states have (on average 1.3390076937057007) internal successors, (22103), 16604 states have internal predecessors, (22103), 98 states have call successors, (98), 2 states have call predecessors, (98), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:14:00,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16607 states to 16607 states and 22201 transitions. [2022-11-23 03:14:00,983 INFO L78 Accepts]: Start accepts. Automaton has 16607 states and 22201 transitions. Word has length 28 [2022-11-23 03:14:00,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:14:00,984 INFO L495 AbstractCegarLoop]: Abstraction has 16607 states and 22201 transitions. [2022-11-23 03:14:00,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:14:00,984 INFO L276 IsEmpty]: Start isEmpty. Operand 16607 states and 22201 transitions. [2022-11-23 03:14:00,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-23 03:14:00,984 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:14:00,985 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, 1, 1, 1, 1, 1] [2022-11-23 03:14:00,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-23 03:14:00,985 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:14:00,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:14:00,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1594983404, now seen corresponding path program 1 times [2022-11-23 03:14:00,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:14:00,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545899078] [2022-11-23 03:14:00,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:14:00,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:14:00,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:14:01,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:14:01,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:14:01,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545899078] [2022-11-23 03:14:01,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545899078] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:14:01,036 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:14:01,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 03:14:01,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655584353] [2022-11-23 03:14:01,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:14:01,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:14:01,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:14:01,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:14:01,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:14:01,037 INFO L87 Difference]: Start difference. First operand 16607 states and 22201 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:14:01,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:14:01,491 INFO L93 Difference]: Finished difference Result 48238 states and 64732 transitions. [2022-11-23 03:14:01,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:14:01,491 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-11-23 03:14:01,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:14:01,560 INFO L225 Difference]: With dead ends: 48238 [2022-11-23 03:14:01,560 INFO L226 Difference]: Without dead ends: 31633 [2022-11-23 03:14:01,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:14:01,584 INFO L413 NwaCegarLoop]: 858 mSDtfsCounter, 504 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 504 SdHoareTripleChecker+Valid, 1352 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 03:14:01,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [504 Valid, 1352 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 03:14:01,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31633 states. [2022-11-23 03:14:02,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31633 to 31544. [2022-11-23 03:14:02,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31544 states, 31444 states have (on average 1.3317644065640504) internal successors, (41876), 31541 states have internal predecessors, (41876), 98 states have call successors, (98), 2 states have call predecessors, (98), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:14:02,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31544 states to 31544 states and 41974 transitions. [2022-11-23 03:14:02,594 INFO L78 Accepts]: Start accepts. Automaton has 31544 states and 41974 transitions. Word has length 33 [2022-11-23 03:14:02,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:14:02,595 INFO L495 AbstractCegarLoop]: Abstraction has 31544 states and 41974 transitions. [2022-11-23 03:14:02,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:14:02,595 INFO L276 IsEmpty]: Start isEmpty. Operand 31544 states and 41974 transitions. [2022-11-23 03:14:02,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-23 03:14:02,596 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:14:02,596 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:14:02,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-23 03:14:02,596 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:14:02,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:14:02,597 INFO L85 PathProgramCache]: Analyzing trace with hash 132362279, now seen corresponding path program 1 times [2022-11-23 03:14:02,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:14:02,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463188880] [2022-11-23 03:14:02,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:14:02,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:14:02,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:14:02,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:14:02,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:14:02,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463188880] [2022-11-23 03:14:02,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463188880] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:14:02,708 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:14:02,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 03:14:02,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117701176] [2022-11-23 03:14:02,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:14:02,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:14:02,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:14:02,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:14:02,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:14:02,710 INFO L87 Difference]: Start difference. First operand 31544 states and 41974 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:14:03,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:14:03,433 INFO L93 Difference]: Finished difference Result 73175 states and 97409 transitions. [2022-11-23 03:14:03,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:14:03,434 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-11-23 03:14:03,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:14:03,524 INFO L225 Difference]: With dead ends: 73175 [2022-11-23 03:14:03,525 INFO L226 Difference]: Without dead ends: 41633 [2022-11-23 03:14:03,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:14:03,559 INFO L413 NwaCegarLoop]: 519 mSDtfsCounter, 483 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 483 SdHoareTripleChecker+Valid, 965 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 03:14:03,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [483 Valid, 965 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 03:14:03,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41633 states. [2022-11-23 03:14:04,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41633 to 41551. [2022-11-23 03:14:04,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41551 states, 41451 states have (on average 1.3153603049383609) internal successors, (54523), 41548 states have internal predecessors, (54523), 98 states have call successors, (98), 2 states have call predecessors, (98), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:14:04,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41551 states to 41551 states and 54621 transitions. [2022-11-23 03:14:04,557 INFO L78 Accepts]: Start accepts. Automaton has 41551 states and 54621 transitions. Word has length 34 [2022-11-23 03:14:04,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:14:04,558 INFO L495 AbstractCegarLoop]: Abstraction has 41551 states and 54621 transitions. [2022-11-23 03:14:04,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:14:04,559 INFO L276 IsEmpty]: Start isEmpty. Operand 41551 states and 54621 transitions. [2022-11-23 03:14:04,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-23 03:14:04,559 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:14:04,559 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:14:04,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-23 03:14:04,560 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:14:04,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:14:04,561 INFO L85 PathProgramCache]: Analyzing trace with hash -209128006, now seen corresponding path program 1 times [2022-11-23 03:14:04,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:14:04,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511820890] [2022-11-23 03:14:04,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:14:04,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:14:04,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:14:04,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:14:04,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:14:04,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511820890] [2022-11-23 03:14:04,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511820890] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:14:04,646 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:14:04,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 03:14:04,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436955163] [2022-11-23 03:14:04,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:14:04,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:14:04,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:14:04,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:14:04,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:14:04,649 INFO L87 Difference]: Start difference. First operand 41551 states and 54621 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:14:05,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:14:05,569 INFO L93 Difference]: Finished difference Result 105458 states and 138388 transitions. [2022-11-23 03:14:05,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:14:05,570 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-11-23 03:14:05,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:14:05,701 INFO L225 Difference]: With dead ends: 105458 [2022-11-23 03:14:05,702 INFO L226 Difference]: Without dead ends: 63909 [2022-11-23 03:14:05,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:14:05,727 INFO L413 NwaCegarLoop]: 980 mSDtfsCounter, 440 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 1445 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 03:14:05,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [440 Valid, 1445 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 03:14:05,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63909 states. [2022-11-23 03:14:06,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63909 to 59950. [2022-11-23 03:14:06,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59950 states, 59850 states have (on average 1.2822222222222222) internal successors, (76741), 59947 states have internal predecessors, (76741), 98 states have call successors, (98), 2 states have call predecessors, (98), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:14:07,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59950 states to 59950 states and 76839 transitions. [2022-11-23 03:14:07,081 INFO L78 Accepts]: Start accepts. Automaton has 59950 states and 76839 transitions. Word has length 40 [2022-11-23 03:14:07,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:14:07,081 INFO L495 AbstractCegarLoop]: Abstraction has 59950 states and 76839 transitions. [2022-11-23 03:14:07,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:14:07,082 INFO L276 IsEmpty]: Start isEmpty. Operand 59950 states and 76839 transitions. [2022-11-23 03:14:07,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-23 03:14:07,082 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:14:07,082 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:14:07,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-23 03:14:07,083 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:14:07,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:14:07,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1653138166, now seen corresponding path program 1 times [2022-11-23 03:14:07,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:14:07,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827418307] [2022-11-23 03:14:07,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:14:07,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:14:07,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:14:07,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:14:07,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:14:07,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827418307] [2022-11-23 03:14:07,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827418307] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:14:07,159 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:14:07,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 03:14:07,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481467710] [2022-11-23 03:14:07,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:14:07,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:14:07,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:14:07,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:14:07,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:14:07,161 INFO L87 Difference]: Start difference. First operand 59950 states and 76839 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 2 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:14:08,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:14:08,267 INFO L93 Difference]: Finished difference Result 157117 states and 202813 transitions. [2022-11-23 03:14:08,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:14:08,267 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 2 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-11-23 03:14:08,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:14:08,526 INFO L225 Difference]: With dead ends: 157117 [2022-11-23 03:14:08,526 INFO L226 Difference]: Without dead ends: 97169 [2022-11-23 03:14:08,565 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 [2022-11-23 03:14:08,565 INFO L413 NwaCegarLoop]: 530 mSDtfsCounter, 450 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 984 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 03:14:08,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [450 Valid, 984 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 03:14:08,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97169 states. [2022-11-23 03:14:10,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97169 to 97090. [2022-11-23 03:14:10,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97090 states, 96990 states have (on average 1.274615939787607) internal successors, (123625), 97087 states have internal predecessors, (123625), 98 states have call successors, (98), 2 states have call predecessors, (98), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:14:10,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97090 states to 97090 states and 123723 transitions. [2022-11-23 03:14:10,368 INFO L78 Accepts]: Start accepts. Automaton has 97090 states and 123723 transitions. Word has length 40 [2022-11-23 03:14:10,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:14:10,368 INFO L495 AbstractCegarLoop]: Abstraction has 97090 states and 123723 transitions. [2022-11-23 03:14:10,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 2 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:14:10,369 INFO L276 IsEmpty]: Start isEmpty. Operand 97090 states and 123723 transitions. [2022-11-23 03:14:10,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-23 03:14:10,369 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:14:10,369 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:14:10,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-23 03:14:10,370 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:14:10,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:14:10,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1240470838, now seen corresponding path program 1 times [2022-11-23 03:14:10,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:14:10,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723420958] [2022-11-23 03:14:10,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:14:10,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:14:10,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:14:10,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:14:10,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:14:10,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723420958] [2022-11-23 03:14:10,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723420958] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:14:10,462 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:14:10,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 03:14:10,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876351110] [2022-11-23 03:14:10,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:14:10,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:14:10,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:14:10,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:14:10,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:14:10,464 INFO L87 Difference]: Start difference. First operand 97090 states and 123723 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:14:11,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:14:11,811 INFO L93 Difference]: Finished difference Result 174054 states and 221151 transitions. [2022-11-23 03:14:11,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:14:11,812 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-11-23 03:14:11,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:14:12,146 INFO L225 Difference]: With dead ends: 174054 [2022-11-23 03:14:12,146 INFO L226 Difference]: Without dead ends: 174051 [2022-11-23 03:14:12,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:14:12,183 INFO L413 NwaCegarLoop]: 1036 mSDtfsCounter, 527 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 1576 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 03:14:12,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [527 Valid, 1576 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 03:14:12,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174051 states. [2022-11-23 03:14:14,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174051 to 173830. [2022-11-23 03:14:14,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173830 states, 173730 states have (on average 1.269723133598112) internal successors, (220589), 173827 states have internal predecessors, (220589), 98 states have call successors, (98), 2 states have call predecessors, (98), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:14:15,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173830 states to 173830 states and 220687 transitions. [2022-11-23 03:14:15,758 INFO L78 Accepts]: Start accepts. Automaton has 173830 states and 220687 transitions. Word has length 45 [2022-11-23 03:14:15,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:14:15,759 INFO L495 AbstractCegarLoop]: Abstraction has 173830 states and 220687 transitions. [2022-11-23 03:14:15,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:14:15,759 INFO L276 IsEmpty]: Start isEmpty. Operand 173830 states and 220687 transitions. [2022-11-23 03:14:15,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-23 03:14:15,760 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:14:15,760 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:14:15,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-23 03:14:15,771 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:14:15,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:14:15,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1976305641, now seen corresponding path program 1 times [2022-11-23 03:14:15,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:14:15,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773165346] [2022-11-23 03:14:15,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:14:15,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:14:15,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:14:15,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:14:15,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:14:15,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773165346] [2022-11-23 03:14:15,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773165346] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:14:15,829 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:14:15,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 03:14:15,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802882827] [2022-11-23 03:14:15,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:14:15,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 03:14:15,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:14:15,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 03:14:15,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 03:14:15,831 INFO L87 Difference]: Start difference. First operand 173830 states and 220687 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:14:18,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:14:18,523 INFO L93 Difference]: Finished difference Result 454683 states and 576582 transitions. [2022-11-23 03:14:18,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 03:14:18,524 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-11-23 03:14:18,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:14:18,952 INFO L225 Difference]: With dead ends: 454683 [2022-11-23 03:14:18,952 INFO L226 Difference]: Without dead ends: 280855 [2022-11-23 03:14:19,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 03:14:19,064 INFO L413 NwaCegarLoop]: 584 mSDtfsCounter, 753 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 645 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 753 SdHoareTripleChecker+Valid, 725 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-23 03:14:19,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [753 Valid, 725 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 645 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-23 03:14:19,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280855 states. [2022-11-23 03:14:22,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280855 to 173825. [2022-11-23 03:14:22,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173825 states, 173730 states have (on average 1.2597075922408334) internal successors, (218849), 173822 states have internal predecessors, (218849), 93 states have call successors, (93), 2 states have call predecessors, (93), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:14:23,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173825 states to 173825 states and 218942 transitions. [2022-11-23 03:14:23,007 INFO L78 Accepts]: Start accepts. Automaton has 173825 states and 218942 transitions. Word has length 48 [2022-11-23 03:14:23,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:14:23,008 INFO L495 AbstractCegarLoop]: Abstraction has 173825 states and 218942 transitions. [2022-11-23 03:14:23,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:14:23,008 INFO L276 IsEmpty]: Start isEmpty. Operand 173825 states and 218942 transitions. [2022-11-23 03:14:23,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-23 03:14:23,009 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:14:23,009 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:14:23,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-23 03:14:23,010 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:14:23,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:14:23,010 INFO L85 PathProgramCache]: Analyzing trace with hash 951319779, now seen corresponding path program 1 times [2022-11-23 03:14:23,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:14:23,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839847415] [2022-11-23 03:14:23,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:14:23,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:14:23,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:14:23,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:14:23,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:14:23,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839847415] [2022-11-23 03:14:23,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839847415] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:14:23,058 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:14:23,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 03:14:23,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024382059] [2022-11-23 03:14:23,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:14:23,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:14:23,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:14:23,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:14:23,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:14:23,060 INFO L87 Difference]: Start difference. First operand 173825 states and 218942 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:14:25,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:14:25,112 INFO L93 Difference]: Finished difference Result 343392 states and 432799 transitions. [2022-11-23 03:14:25,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:14:25,113 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2022-11-23 03:14:25,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:14:25,293 INFO L225 Difference]: With dead ends: 343392 [2022-11-23 03:14:25,293 INFO L226 Difference]: Without dead ends: 169569 [2022-11-23 03:14:25,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:14:25,397 INFO L413 NwaCegarLoop]: 284 mSDtfsCounter, 389 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 03:14:25,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [389 Valid, 361 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 03:14:25,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169569 states. [2022-11-23 03:14:27,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169569 to 89809. [2022-11-23 03:14:27,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89809 states, 89714 states have (on average 1.2017299418151013) internal successors, (107812), 89806 states have internal predecessors, (107812), 93 states have call successors, (93), 2 states have call predecessors, (93), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:14:27,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89809 states to 89809 states and 107905 transitions. [2022-11-23 03:14:27,292 INFO L78 Accepts]: Start accepts. Automaton has 89809 states and 107905 transitions. Word has length 58 [2022-11-23 03:14:27,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:14:27,292 INFO L495 AbstractCegarLoop]: Abstraction has 89809 states and 107905 transitions. [2022-11-23 03:14:27,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:14:27,292 INFO L276 IsEmpty]: Start isEmpty. Operand 89809 states and 107905 transitions. [2022-11-23 03:14:27,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-23 03:14:27,294 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:14:27,294 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:14:27,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-23 03:14:27,294 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:14:27,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:14:27,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1754865588, now seen corresponding path program 1 times [2022-11-23 03:14:27,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:14:27,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910900642] [2022-11-23 03:14:27,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:14:27,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:14:27,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:14:27,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:14:27,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:14:27,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910900642] [2022-11-23 03:14:27,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910900642] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:14:27,871 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:14:27,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 03:14:27,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479533443] [2022-11-23 03:14:27,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:14:27,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:14:27,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:14:27,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:14:27,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:14:27,875 INFO L87 Difference]: Start difference. First operand 89809 states and 107905 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:14:28,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:14:28,668 INFO L93 Difference]: Finished difference Result 128298 states and 153371 transitions. [2022-11-23 03:14:28,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:14:28,669 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2022-11-23 03:14:28,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:14:28,827 INFO L225 Difference]: With dead ends: 128298 [2022-11-23 03:14:28,827 INFO L226 Difference]: Without dead ends: 128293 [2022-11-23 03:14:28,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:14:28,861 INFO L413 NwaCegarLoop]: 740 mSDtfsCounter, 445 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 1264 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 03:14:28,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [445 Valid, 1264 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 03:14:28,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128293 states. [2022-11-23 03:14:30,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128293 to 128079. [2022-11-23 03:14:30,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128079 states, 127984 states have (on average 1.1906722715339417) internal successors, (152387), 128076 states have internal predecessors, (152387), 93 states have call successors, (93), 2 states have call predecessors, (93), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:14:31,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128079 states to 128079 states and 152480 transitions. [2022-11-23 03:14:31,198 INFO L78 Accepts]: Start accepts. Automaton has 128079 states and 152480 transitions. Word has length 113 [2022-11-23 03:14:31,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:14:31,199 INFO L495 AbstractCegarLoop]: Abstraction has 128079 states and 152480 transitions. [2022-11-23 03:14:31,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:14:31,199 INFO L276 IsEmpty]: Start isEmpty. Operand 128079 states and 152480 transitions. [2022-11-23 03:14:31,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-23 03:14:31,217 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:14:31,217 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:14:31,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-23 03:14:31,217 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:14:31,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:14:31,218 INFO L85 PathProgramCache]: Analyzing trace with hash 149557454, now seen corresponding path program 1 times [2022-11-23 03:14:31,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:14:31,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369265456] [2022-11-23 03:14:31,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:14:31,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:14:31,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:14:31,322 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 03:14:31,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:14:31,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369265456] [2022-11-23 03:14:31,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369265456] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:14:31,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:14:31,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 03:14:31,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632656826] [2022-11-23 03:14:31,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:14:31,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:14:31,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:14:31,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:14:31,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:14:31,325 INFO L87 Difference]: Start difference. First operand 128079 states and 152480 transitions. Second operand has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:14:32,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:14:32,505 INFO L93 Difference]: Finished difference Result 275491 states and 332198 transitions. [2022-11-23 03:14:32,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:14:32,505 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 144 [2022-11-23 03:14:32,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:14:32,684 INFO L225 Difference]: With dead ends: 275491 [2022-11-23 03:14:32,684 INFO L226 Difference]: Without dead ends: 147535 [2022-11-23 03:14:32,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:14:32,774 INFO L413 NwaCegarLoop]: 371 mSDtfsCounter, 323 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 03:14:32,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [323 Valid, 518 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 03:14:33,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147535 states. [2022-11-23 03:14:35,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147535 to 147227. [2022-11-23 03:14:35,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147227 states, 147132 states have (on average 1.1926773237636952) internal successors, (175481), 147224 states have internal predecessors, (175481), 93 states have call successors, (93), 2 states have call predecessors, (93), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:14:35,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147227 states to 147227 states and 175574 transitions. [2022-11-23 03:14:35,506 INFO L78 Accepts]: Start accepts. Automaton has 147227 states and 175574 transitions. Word has length 144 [2022-11-23 03:14:35,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:14:35,506 INFO L495 AbstractCegarLoop]: Abstraction has 147227 states and 175574 transitions. [2022-11-23 03:14:35,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:14:35,506 INFO L276 IsEmpty]: Start isEmpty. Operand 147227 states and 175574 transitions. [2022-11-23 03:14:35,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-11-23 03:14:35,508 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:14:35,509 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:14:35,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-23 03:14:35,509 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:14:35,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:14:35,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1572407842, now seen corresponding path program 1 times [2022-11-23 03:14:35,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:14:35,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015914854] [2022-11-23 03:14:35,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:14:35,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:14:35,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:14:36,174 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-23 03:14:36,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:14:36,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015914854] [2022-11-23 03:14:36,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015914854] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:14:36,175 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:14:36,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 03:14:36,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617748116] [2022-11-23 03:14:36,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:14:36,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:14:36,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:14:36,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:14:36,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:14:36,179 INFO L87 Difference]: Start difference. First operand 147227 states and 175574 transitions. Second operand has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:14:39,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:14:39,026 INFO L93 Difference]: Finished difference Result 424126 states and 506087 transitions. [2022-11-23 03:14:39,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:14:39,026 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 146 [2022-11-23 03:14:39,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:14:39,442 INFO L225 Difference]: With dead ends: 424126 [2022-11-23 03:14:39,442 INFO L226 Difference]: Without dead ends: 277022 [2022-11-23 03:14:39,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:14:39,527 INFO L413 NwaCegarLoop]: 486 mSDtfsCounter, 513 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 513 SdHoareTripleChecker+Valid, 916 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 03:14:39,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [513 Valid, 916 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 03:14:39,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277022 states.