./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl/s3_srvr.blast.14.i.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf02b8d5-0555-40ab-935d-3d45ba0775b0/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf02b8d5-0555-40ab-935d-3d45ba0775b0/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf02b8d5-0555-40ab-935d-3d45ba0775b0/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf02b8d5-0555-40ab-935d-3d45ba0775b0/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.14.i.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf02b8d5-0555-40ab-935d-3d45ba0775b0/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf02b8d5-0555-40ab-935d-3d45ba0775b0/bin/uautomizer-DQz5hQGWxF --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 c787ca3f5ef50a57f784051363b84589420330fab7f782436c3962ae2d911801 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:08:47,185 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:08:47,188 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:08:47,231 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:08:47,232 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:08:47,234 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:08:47,236 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:08:47,240 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:08:47,246 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:08:47,248 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:08:47,250 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:08:47,254 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:08:47,255 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:08:47,262 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:08:47,265 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:08:47,267 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:08:47,269 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:08:47,270 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:08:47,279 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:08:47,289 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:08:47,292 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:08:47,296 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:08:47,302 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:08:47,303 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:08:47,319 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:08:47,320 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:08:47,321 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:08:47,323 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:08:47,324 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:08:47,327 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:08:47,327 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:08:47,329 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:08:47,332 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:08:47,334 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:08:47,336 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:08:47,336 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:08:47,337 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:08:47,338 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:08:47,338 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:08:47,340 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:08:47,341 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:08:47,342 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf02b8d5-0555-40ab-935d-3d45ba0775b0/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 06:08:47,413 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:08:47,413 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:08:47,414 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:08:47,414 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:08:47,420 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:08:47,420 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:08:47,421 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:08:47,423 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:08:47,423 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:08:47,424 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:08:47,425 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 06:08:47,426 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 06:08:47,426 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 06:08:47,426 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:08:47,427 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 06:08:47,427 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:08:47,427 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 06:08:47,428 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 06:08:47,428 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 06:08:47,428 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:08:47,428 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 06:08:47,429 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:08:47,429 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:08:47,429 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:08:47,430 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:08:47,430 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:08:47,431 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:08:47,431 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 06:08:47,431 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 06:08:47,433 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 06:08:47,434 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 06:08:47,434 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 06:08:47,435 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 06:08:47,435 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:08:47,435 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf02b8d5-0555-40ab-935d-3d45ba0775b0/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf02b8d5-0555-40ab-935d-3d45ba0775b0/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c787ca3f5ef50a57f784051363b84589420330fab7f782436c3962ae2d911801 [2021-11-20 06:08:47,932 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:08:47,973 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:08:47,977 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:08:47,979 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:08:47,985 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:08:47,988 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf02b8d5-0555-40ab-935d-3d45ba0775b0/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/openssl/s3_srvr.blast.14.i.cil-1.c [2021-11-20 06:08:48,107 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf02b8d5-0555-40ab-935d-3d45ba0775b0/bin/uautomizer-DQz5hQGWxF/data/88e356bc7/09278ae6f4e24d3a9937b732b353f331/FLAG38e1bf624 [2021-11-20 06:08:48,974 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:08:48,975 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf02b8d5-0555-40ab-935d-3d45ba0775b0/sv-benchmarks/c/openssl/s3_srvr.blast.14.i.cil-1.c [2021-11-20 06:08:49,005 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf02b8d5-0555-40ab-935d-3d45ba0775b0/bin/uautomizer-DQz5hQGWxF/data/88e356bc7/09278ae6f4e24d3a9937b732b353f331/FLAG38e1bf624 [2021-11-20 06:08:49,113 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf02b8d5-0555-40ab-935d-3d45ba0775b0/bin/uautomizer-DQz5hQGWxF/data/88e356bc7/09278ae6f4e24d3a9937b732b353f331 [2021-11-20 06:08:49,117 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:08:49,121 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:08:49,126 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:08:49,127 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:08:49,131 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:08:49,132 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:08:49" (1/1) ... [2021-11-20 06:08:49,134 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33b635c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:08:49, skipping insertion in model container [2021-11-20 06:08:49,135 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:08:49" (1/1) ... [2021-11-20 06:08:49,145 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:08:49,263 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:08:49,854 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf02b8d5-0555-40ab-935d-3d45ba0775b0/sv-benchmarks/c/openssl/s3_srvr.blast.14.i.cil-1.c[76536,76549] [2021-11-20 06:08:49,865 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:08:49,892 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:08:50,173 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf02b8d5-0555-40ab-935d-3d45ba0775b0/sv-benchmarks/c/openssl/s3_srvr.blast.14.i.cil-1.c[76536,76549] [2021-11-20 06:08:50,177 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:08:50,202 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:08:50,203 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:08:50 WrapperNode [2021-11-20 06:08:50,204 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:08:50,206 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:08:50,206 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:08:50,207 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:08:50,217 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:08:50" (1/1) ... [2021-11-20 06:08:50,273 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:08:50" (1/1) ... [2021-11-20 06:08:50,330 INFO L137 Inliner]: procedures = 31, calls = 223, calls flagged for inlining = 7, calls inlined = 3, statements flattened = 804 [2021-11-20 06:08:50,330 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:08:50,331 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:08:50,331 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:08:50,332 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:08:50,343 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:08:50" (1/1) ... [2021-11-20 06:08:50,344 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:08:50" (1/1) ... [2021-11-20 06:08:50,354 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:08:50" (1/1) ... [2021-11-20 06:08:50,355 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:08:50" (1/1) ... [2021-11-20 06:08:50,406 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:08:50" (1/1) ... [2021-11-20 06:08:50,416 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:08:50" (1/1) ... [2021-11-20 06:08:50,420 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:08:50" (1/1) ... [2021-11-20 06:08:50,427 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:08:50,429 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:08:50,429 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:08:50,429 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:08:50,431 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:08:50" (1/1) ... [2021-11-20 06:08:50,454 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:08:50,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf02b8d5-0555-40ab-935d-3d45ba0775b0/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:08:50,495 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf02b8d5-0555-40ab-935d-3d45ba0775b0/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:08:50,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf02b8d5-0555-40ab-935d-3d45ba0775b0/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:08:50,557 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 06:08:50,557 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 06:08:50,557 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 06:08:50,558 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 06:08:50,558 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 06:08:50,558 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 06:08:50,558 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 06:08:50,558 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:08:50,558 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:08:50,841 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:08:50,843 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:08:50,886 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-20 06:08:54,270 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-11-20 06:08:54,271 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-11-20 06:08:54,271 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:08:54,292 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:08:54,292 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-20 06:08:54,294 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:08:54 BoogieIcfgContainer [2021-11-20 06:08:54,295 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:08:54,297 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:08:54,297 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:08:54,302 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:08:54,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:08:49" (1/3) ... [2021-11-20 06:08:54,303 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@160aab90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:08:54, skipping insertion in model container [2021-11-20 06:08:54,303 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:08:50" (2/3) ... [2021-11-20 06:08:54,304 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@160aab90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:08:54, skipping insertion in model container [2021-11-20 06:08:54,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:08:54" (3/3) ... [2021-11-20 06:08:54,306 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.14.i.cil-1.c [2021-11-20 06:08:54,314 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:08:54,315 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 06:08:54,410 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:08:54,424 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 06:08:54,425 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 06:08:54,459 INFO L276 IsEmpty]: Start isEmpty. Operand has 156 states, 154 states have (on average 1.7272727272727273) internal successors, (266), 155 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:08:54,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-20 06:08:54,474 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:08:54,474 INFO L514 BasicCegarLoop]: 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] [2021-11-20 06:08:54,478 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:08:54,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:08:54,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1590777164, now seen corresponding path program 1 times [2021-11-20 06:08:54,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:08:54,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555996963] [2021-11-20 06:08:54,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:08:54,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:08:54,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:54,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:08:54,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:08:54,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555996963] [2021-11-20 06:08:54,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555996963] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:08:54,969 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:08:54,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:08:54,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753951809] [2021-11-20 06:08:54,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:08:54,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:08:54,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:08:55,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:08:55,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:08:55,016 INFO L87 Difference]: Start difference. First operand has 156 states, 154 states have (on average 1.7272727272727273) internal successors, (266), 155 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:08:56,322 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:08:57,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:08:57,065 INFO L93 Difference]: Finished difference Result 337 states and 574 transitions. [2021-11-20 06:08:57,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:08:57,069 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-20 06:08:57,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:08:57,083 INFO L225 Difference]: With dead ends: 337 [2021-11-20 06:08:57,083 INFO L226 Difference]: Without dead ends: 171 [2021-11-20 06:08:57,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:08:57,093 INFO L933 BasicCegarLoop]: 236 mSDtfsCounter, 36 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 621 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-20 06:08:57,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 621 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-20 06:08:57,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-11-20 06:08:57,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 154. [2021-11-20 06:08:57,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 1.5751633986928104) internal successors, (241), 153 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:08:57,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 241 transitions. [2021-11-20 06:08:57,158 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 241 transitions. Word has length 45 [2021-11-20 06:08:57,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:08:57,159 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 241 transitions. [2021-11-20 06:08:57,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:08:57,160 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 241 transitions. [2021-11-20 06:08:57,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-20 06:08:57,164 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:08:57,164 INFO L514 BasicCegarLoop]: 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] [2021-11-20 06:08:57,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 06:08:57,165 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:08:57,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:08:57,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1074933118, now seen corresponding path program 1 times [2021-11-20 06:08:57,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:08:57,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617176098] [2021-11-20 06:08:57,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:08:57,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:08:57,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:57,399 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:08:57,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:08:57,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617176098] [2021-11-20 06:08:57,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617176098] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:08:57,401 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:08:57,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:08:57,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591050326] [2021-11-20 06:08:57,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:08:57,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:08:57,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:08:57,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:08:57,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:08:57,406 INFO L87 Difference]: Start difference. First operand 154 states and 241 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:08:59,419 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:09:00,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:09:00,011 INFO L93 Difference]: Finished difference Result 304 states and 470 transitions. [2021-11-20 06:09:00,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:09:00,012 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-20 06:09:00,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:09:00,015 INFO L225 Difference]: With dead ends: 304 [2021-11-20 06:09:00,015 INFO L226 Difference]: Without dead ends: 171 [2021-11-20 06:09:00,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:09:00,019 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 24 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:09:00,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 507 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 148 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2021-11-20 06:09:00,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-11-20 06:09:00,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 154. [2021-11-20 06:09:00,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 1.5686274509803921) internal successors, (240), 153 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:00,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 240 transitions. [2021-11-20 06:09:00,040 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 240 transitions. Word has length 58 [2021-11-20 06:09:00,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:09:00,041 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 240 transitions. [2021-11-20 06:09:00,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:00,042 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 240 transitions. [2021-11-20 06:09:00,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-20 06:09:00,045 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:09:00,046 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:09:00,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 06:09:00,046 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:09:00,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:09:00,048 INFO L85 PathProgramCache]: Analyzing trace with hash 511226003, now seen corresponding path program 1 times [2021-11-20 06:09:00,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:09:00,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288620283] [2021-11-20 06:09:00,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:09:00,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:09:00,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:00,287 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:09:00,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:09:00,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288620283] [2021-11-20 06:09:00,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288620283] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:09:00,288 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:09:00,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:09:00,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851175281] [2021-11-20 06:09:00,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:09:00,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:09:00,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:09:00,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:09:00,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:09:00,291 INFO L87 Difference]: Start difference. First operand 154 states and 240 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:02,303 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:09:02,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:09:02,764 INFO L93 Difference]: Finished difference Result 303 states and 468 transitions. [2021-11-20 06:09:02,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:09:02,765 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-20 06:09:02,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:09:02,768 INFO L225 Difference]: With dead ends: 303 [2021-11-20 06:09:02,768 INFO L226 Difference]: Without dead ends: 170 [2021-11-20 06:09:02,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:09:02,771 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 28 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:09:02,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 509 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 146 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 06:09:02,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-11-20 06:09:02,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 154. [2021-11-20 06:09:02,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 1.5620915032679739) internal successors, (239), 153 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:02,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 239 transitions. [2021-11-20 06:09:02,788 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 239 transitions. Word has length 59 [2021-11-20 06:09:02,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:09:02,788 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 239 transitions. [2021-11-20 06:09:02,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:02,789 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 239 transitions. [2021-11-20 06:09:02,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-20 06:09:02,792 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:09:02,793 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:09:02,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 06:09:02,793 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:09:02,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:09:02,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1896837849, now seen corresponding path program 1 times [2021-11-20 06:09:02,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:09:02,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402447824] [2021-11-20 06:09:02,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:09:02,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:09:02,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:02,958 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:09:02,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:09:02,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402447824] [2021-11-20 06:09:02,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402447824] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:09:02,966 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:09:02,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:09:02,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072547434] [2021-11-20 06:09:02,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:09:02,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:09:02,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:09:02,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:09:02,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:09:02,968 INFO L87 Difference]: Start difference. First operand 154 states and 239 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:04,983 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:09:05,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:09:05,482 INFO L93 Difference]: Finished difference Result 303 states and 467 transitions. [2021-11-20 06:09:05,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:09:05,483 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-20 06:09:05,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:09:05,485 INFO L225 Difference]: With dead ends: 303 [2021-11-20 06:09:05,485 INFO L226 Difference]: Without dead ends: 170 [2021-11-20 06:09:05,486 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:09:05,488 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 26 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:09:05,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 509 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 146 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2021-11-20 06:09:05,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-11-20 06:09:05,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 154. [2021-11-20 06:09:05,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 1.5555555555555556) internal successors, (238), 153 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:05,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 238 transitions. [2021-11-20 06:09:05,503 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 238 transitions. Word has length 59 [2021-11-20 06:09:05,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:09:05,503 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 238 transitions. [2021-11-20 06:09:05,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:05,504 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 238 transitions. [2021-11-20 06:09:05,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-20 06:09:05,507 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:09:05,508 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:09:05,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 06:09:05,508 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:09:05,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:09:05,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1546012670, now seen corresponding path program 1 times [2021-11-20 06:09:05,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:09:05,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547713321] [2021-11-20 06:09:05,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:09:05,511 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:09:05,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:05,610 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:09:05,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:09:05,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547713321] [2021-11-20 06:09:05,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547713321] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:09:05,612 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:09:05,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:09:05,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643991303] [2021-11-20 06:09:05,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:09:05,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:09:05,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:09:05,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:09:05,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:09:05,615 INFO L87 Difference]: Start difference. First operand 154 states and 238 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:07,626 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:09:08,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:09:08,105 INFO L93 Difference]: Finished difference Result 302 states and 465 transitions. [2021-11-20 06:09:08,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:09:08,106 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-20 06:09:08,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:09:08,108 INFO L225 Difference]: With dead ends: 302 [2021-11-20 06:09:08,109 INFO L226 Difference]: Without dead ends: 169 [2021-11-20 06:09:08,109 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:09:08,111 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 19 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:09:08,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 511 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 144 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2021-11-20 06:09:08,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-11-20 06:09:08,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 154. [2021-11-20 06:09:08,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 1.5490196078431373) internal successors, (237), 153 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:08,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 237 transitions. [2021-11-20 06:09:08,123 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 237 transitions. Word has length 59 [2021-11-20 06:09:08,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:09:08,124 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 237 transitions. [2021-11-20 06:09:08,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:08,124 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 237 transitions. [2021-11-20 06:09:08,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-20 06:09:08,128 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:09:08,128 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:09:08,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 06:09:08,129 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:09:08,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:09:08,130 INFO L85 PathProgramCache]: Analyzing trace with hash -457207618, now seen corresponding path program 1 times [2021-11-20 06:09:08,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:09:08,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105594718] [2021-11-20 06:09:08,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:09:08,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:09:08,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:08,241 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:09:08,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:09:08,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105594718] [2021-11-20 06:09:08,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105594718] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:09:08,242 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:09:08,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:09:08,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634695017] [2021-11-20 06:09:08,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:09:08,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:09:08,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:09:08,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:09:08,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:09:08,246 INFO L87 Difference]: Start difference. First operand 154 states and 237 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:09,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:09:09,513 INFO L93 Difference]: Finished difference Result 300 states and 462 transitions. [2021-11-20 06:09:09,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:09:09,515 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-20 06:09:09,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:09:09,517 INFO L225 Difference]: With dead ends: 300 [2021-11-20 06:09:09,517 INFO L226 Difference]: Without dead ends: 167 [2021-11-20 06:09:09,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:09:09,519 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 19 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:09:09,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 515 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-20 06:09:09,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-11-20 06:09:09,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 154. [2021-11-20 06:09:09,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 1.542483660130719) internal successors, (236), 153 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:09,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 236 transitions. [2021-11-20 06:09:09,530 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 236 transitions. Word has length 59 [2021-11-20 06:09:09,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:09:09,530 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 236 transitions. [2021-11-20 06:09:09,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:09,531 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 236 transitions. [2021-11-20 06:09:09,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-20 06:09:09,534 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:09:09,534 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:09:09,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 06:09:09,535 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:09:09,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:09:09,536 INFO L85 PathProgramCache]: Analyzing trace with hash 385338667, now seen corresponding path program 1 times [2021-11-20 06:09:09,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:09:09,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036505254] [2021-11-20 06:09:09,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:09:09,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:09:09,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:09,634 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:09:09,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:09:09,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036505254] [2021-11-20 06:09:09,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036505254] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:09:09,635 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:09:09,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:09:09,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730484857] [2021-11-20 06:09:09,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:09:09,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:09:09,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:09:09,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:09:09,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:09:09,638 INFO L87 Difference]: Start difference. First operand 154 states and 236 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:11,649 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:09:12,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:09:12,034 INFO L93 Difference]: Finished difference Result 300 states and 461 transitions. [2021-11-20 06:09:12,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:09:12,036 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-20 06:09:12,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:09:12,037 INFO L225 Difference]: With dead ends: 300 [2021-11-20 06:09:12,038 INFO L226 Difference]: Without dead ends: 167 [2021-11-20 06:09:12,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:09:12,039 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 22 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:09:12,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 515 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 140 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 06:09:12,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-11-20 06:09:12,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 154. [2021-11-20 06:09:12,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 1.5359477124183007) internal successors, (235), 153 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:12,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 235 transitions. [2021-11-20 06:09:12,050 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 235 transitions. Word has length 60 [2021-11-20 06:09:12,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:09:12,051 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 235 transitions. [2021-11-20 06:09:12,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:12,052 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 235 transitions. [2021-11-20 06:09:12,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-20 06:09:12,055 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:09:12,055 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:09:12,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-20 06:09:12,056 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:09:12,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:09:12,059 INFO L85 PathProgramCache]: Analyzing trace with hash -616870676, now seen corresponding path program 1 times [2021-11-20 06:09:12,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:09:12,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071556867] [2021-11-20 06:09:12,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:09:12,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:09:12,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:12,150 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:09:12,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:09:12,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071556867] [2021-11-20 06:09:12,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071556867] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:09:12,152 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:09:12,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:09:12,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961617024] [2021-11-20 06:09:12,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:09:12,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:09:12,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:09:12,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:09:12,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:09:12,155 INFO L87 Difference]: Start difference. First operand 154 states and 235 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:14,086 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:09:14,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:09:14,523 INFO L93 Difference]: Finished difference Result 300 states and 460 transitions. [2021-11-20 06:09:14,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:09:14,525 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-20 06:09:14,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:09:14,527 INFO L225 Difference]: With dead ends: 300 [2021-11-20 06:09:14,527 INFO L226 Difference]: Without dead ends: 167 [2021-11-20 06:09:14,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:09:14,528 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 20 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:09:14,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 515 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 06:09:14,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-11-20 06:09:14,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 154. [2021-11-20 06:09:14,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 1.5294117647058822) internal successors, (234), 153 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:14,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 234 transitions. [2021-11-20 06:09:14,546 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 234 transitions. Word has length 61 [2021-11-20 06:09:14,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:09:14,547 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 234 transitions. [2021-11-20 06:09:14,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:14,547 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 234 transitions. [2021-11-20 06:09:14,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-20 06:09:14,550 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:09:14,550 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:09:14,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-20 06:09:14,551 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:09:14,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:09:14,553 INFO L85 PathProgramCache]: Analyzing trace with hash -355826544, now seen corresponding path program 1 times [2021-11-20 06:09:14,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:09:14,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939752401] [2021-11-20 06:09:14,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:09:14,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:09:14,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:14,714 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:09:14,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:09:14,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939752401] [2021-11-20 06:09:14,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939752401] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:09:14,717 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:09:14,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:09:14,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664870079] [2021-11-20 06:09:14,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:09:14,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:09:14,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:09:14,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:09:14,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:09:14,721 INFO L87 Difference]: Start difference. First operand 154 states and 234 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:16,732 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:09:17,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:09:17,092 INFO L93 Difference]: Finished difference Result 290 states and 446 transitions. [2021-11-20 06:09:17,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:09:17,093 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-20 06:09:17,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:09:17,094 INFO L225 Difference]: With dead ends: 290 [2021-11-20 06:09:17,095 INFO L226 Difference]: Without dead ends: 157 [2021-11-20 06:09:17,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:09:17,096 INFO L933 BasicCegarLoop]: 208 mSDtfsCounter, 11 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:09:17,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 529 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 126 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 06:09:17,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-11-20 06:09:17,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 154. [2021-11-20 06:09:17,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 1.522875816993464) internal successors, (233), 153 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:17,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 233 transitions. [2021-11-20 06:09:17,107 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 233 transitions. Word has length 62 [2021-11-20 06:09:17,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:09:17,108 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 233 transitions. [2021-11-20 06:09:17,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:17,108 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 233 transitions. [2021-11-20 06:09:17,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-20 06:09:17,110 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:09:17,110 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:09:17,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-20 06:09:17,111 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:09:17,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:09:17,112 INFO L85 PathProgramCache]: Analyzing trace with hash -967699976, now seen corresponding path program 1 times [2021-11-20 06:09:17,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:09:17,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119993286] [2021-11-20 06:09:17,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:09:17,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:09:17,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:17,254 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:09:17,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:09:17,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119993286] [2021-11-20 06:09:17,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119993286] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:09:17,255 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:09:17,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:09:17,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679511938] [2021-11-20 06:09:17,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:09:17,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:09:17,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:09:17,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:09:17,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:09:17,258 INFO L87 Difference]: Start difference. First operand 154 states and 233 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:19,268 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:09:19,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:09:19,679 INFO L93 Difference]: Finished difference Result 330 states and 507 transitions. [2021-11-20 06:09:19,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:09:19,680 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-20 06:09:19,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:09:19,682 INFO L225 Difference]: With dead ends: 330 [2021-11-20 06:09:19,683 INFO L226 Difference]: Without dead ends: 197 [2021-11-20 06:09:19,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:09:19,684 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 34 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:09:19,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 527 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 167 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 06:09:19,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-11-20 06:09:19,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 176. [2021-11-20 06:09:19,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 1.5485714285714285) internal successors, (271), 175 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:19,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 271 transitions. [2021-11-20 06:09:19,700 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 271 transitions. Word has length 62 [2021-11-20 06:09:19,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:09:19,701 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 271 transitions. [2021-11-20 06:09:19,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:19,701 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 271 transitions. [2021-11-20 06:09:19,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-20 06:09:19,702 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:09:19,703 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2021-11-20 06:09:19,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-20 06:09:19,704 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:09:19,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:09:19,704 INFO L85 PathProgramCache]: Analyzing trace with hash -2035066434, now seen corresponding path program 1 times [2021-11-20 06:09:19,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:09:19,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611125783] [2021-11-20 06:09:19,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:09:19,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:09:19,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:19,823 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:09:19,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:09:19,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611125783] [2021-11-20 06:09:19,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611125783] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:09:19,824 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:09:19,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:09:19,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672868332] [2021-11-20 06:09:19,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:09:19,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:09:19,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:09:19,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:09:19,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:09:19,831 INFO L87 Difference]: Start difference. First operand 176 states and 271 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:20,918 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:09:21,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:09:21,316 INFO L93 Difference]: Finished difference Result 352 states and 544 transitions. [2021-11-20 06:09:21,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:09:21,320 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-20 06:09:21,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:09:21,322 INFO L225 Difference]: With dead ends: 352 [2021-11-20 06:09:21,323 INFO L226 Difference]: Without dead ends: 197 [2021-11-20 06:09:21,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:09:21,325 INFO L933 BasicCegarLoop]: 205 mSDtfsCounter, 39 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:09:21,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 527 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-20 06:09:21,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-11-20 06:09:21,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 176. [2021-11-20 06:09:21,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 1.542857142857143) internal successors, (270), 175 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:21,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 270 transitions. [2021-11-20 06:09:21,334 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 270 transitions. Word has length 75 [2021-11-20 06:09:21,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:09:21,335 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 270 transitions. [2021-11-20 06:09:21,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:21,335 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 270 transitions. [2021-11-20 06:09:21,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-20 06:09:21,337 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:09:21,337 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-11-20 06:09:21,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-20 06:09:21,338 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:09:21,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:09:21,339 INFO L85 PathProgramCache]: Analyzing trace with hash 811864279, now seen corresponding path program 1 times [2021-11-20 06:09:21,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:09:21,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775101888] [2021-11-20 06:09:21,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:09:21,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:09:21,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:21,409 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:09:21,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:09:21,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775101888] [2021-11-20 06:09:21,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775101888] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:09:21,411 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:09:21,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:09:21,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743401348] [2021-11-20 06:09:21,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:09:21,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:09:21,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:09:21,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:09:21,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:09:21,413 INFO L87 Difference]: Start difference. First operand 176 states and 270 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:23,427 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:09:23,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:09:23,839 INFO L93 Difference]: Finished difference Result 351 states and 541 transitions. [2021-11-20 06:09:23,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:09:23,840 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-20 06:09:23,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:09:23,842 INFO L225 Difference]: With dead ends: 351 [2021-11-20 06:09:23,842 INFO L226 Difference]: Without dead ends: 196 [2021-11-20 06:09:23,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:09:23,843 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 43 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:09:23,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 529 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 164 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 06:09:23,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-11-20 06:09:23,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 176. [2021-11-20 06:09:23,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 1.5371428571428571) internal successors, (269), 175 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:23,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 269 transitions. [2021-11-20 06:09:23,853 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 269 transitions. Word has length 76 [2021-11-20 06:09:23,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:09:23,853 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 269 transitions. [2021-11-20 06:09:23,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:23,854 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 269 transitions. [2021-11-20 06:09:23,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-20 06:09:23,855 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:09:23,856 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-11-20 06:09:23,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-20 06:09:23,856 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:09:23,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:09:23,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1596199573, now seen corresponding path program 1 times [2021-11-20 06:09:23,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:09:23,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079871206] [2021-11-20 06:09:23,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:09:23,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:09:23,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:23,928 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:09:23,929 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:09:23,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079871206] [2021-11-20 06:09:23,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079871206] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:09:23,930 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:09:23,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:09:23,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505399746] [2021-11-20 06:09:23,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:09:23,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:09:23,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:09:23,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:09:23,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:09:23,932 INFO L87 Difference]: Start difference. First operand 176 states and 269 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:25,943 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:09:26,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:09:26,335 INFO L93 Difference]: Finished difference Result 351 states and 539 transitions. [2021-11-20 06:09:26,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:09:26,336 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-20 06:09:26,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:09:26,338 INFO L225 Difference]: With dead ends: 351 [2021-11-20 06:09:26,338 INFO L226 Difference]: Without dead ends: 196 [2021-11-20 06:09:26,339 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:09:26,340 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 41 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:09:26,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 529 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 164 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 06:09:26,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-11-20 06:09:26,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 176. [2021-11-20 06:09:26,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 1.5314285714285714) internal successors, (268), 175 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:26,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 268 transitions. [2021-11-20 06:09:26,350 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 268 transitions. Word has length 76 [2021-11-20 06:09:26,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:09:26,350 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 268 transitions. [2021-11-20 06:09:26,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:26,351 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 268 transitions. [2021-11-20 06:09:26,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-20 06:09:26,352 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:09:26,353 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-20 06:09:26,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-20 06:09:26,353 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:09:26,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:09:26,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1846650946, now seen corresponding path program 1 times [2021-11-20 06:09:26,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:09:26,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686695421] [2021-11-20 06:09:26,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:09:26,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:09:26,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:26,455 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:09:26,455 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:09:26,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686695421] [2021-11-20 06:09:26,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686695421] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:09:26,456 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:09:26,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:09:26,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851877217] [2021-11-20 06:09:26,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:09:26,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:09:26,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:09:26,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:09:26,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:09:26,458 INFO L87 Difference]: Start difference. First operand 176 states and 268 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:28,468 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:09:28,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:09:28,827 INFO L93 Difference]: Finished difference Result 350 states and 536 transitions. [2021-11-20 06:09:28,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:09:28,828 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-20 06:09:28,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:09:28,830 INFO L225 Difference]: With dead ends: 350 [2021-11-20 06:09:28,830 INFO L226 Difference]: Without dead ends: 195 [2021-11-20 06:09:28,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:09:28,832 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 34 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:09:28,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 531 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 162 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 06:09:28,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-11-20 06:09:28,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 176. [2021-11-20 06:09:28,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 1.5257142857142858) internal successors, (267), 175 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:28,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 267 transitions. [2021-11-20 06:09:28,842 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 267 transitions. Word has length 76 [2021-11-20 06:09:28,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:09:28,842 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 267 transitions. [2021-11-20 06:09:28,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:28,843 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 267 transitions. [2021-11-20 06:09:28,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-20 06:09:28,844 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:09:28,845 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-20 06:09:28,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-20 06:09:28,845 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:09:28,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:09:28,846 INFO L85 PathProgramCache]: Analyzing trace with hash -156569342, now seen corresponding path program 1 times [2021-11-20 06:09:28,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:09:28,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361725842] [2021-11-20 06:09:28,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:09:28,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:09:28,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:28,924 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:09:28,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:09:28,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361725842] [2021-11-20 06:09:28,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361725842] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:09:28,925 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:09:28,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:09:28,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654934838] [2021-11-20 06:09:28,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:09:28,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:09:28,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:09:28,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:09:28,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:09:28,928 INFO L87 Difference]: Start difference. First operand 176 states and 267 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:29,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:09:29,998 INFO L93 Difference]: Finished difference Result 348 states and 532 transitions. [2021-11-20 06:09:29,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:09:29,999 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-20 06:09:29,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:09:30,001 INFO L225 Difference]: With dead ends: 348 [2021-11-20 06:09:30,001 INFO L226 Difference]: Without dead ends: 193 [2021-11-20 06:09:30,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:09:30,003 INFO L933 BasicCegarLoop]: 209 mSDtfsCounter, 34 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:09:30,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 535 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-20 06:09:30,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-11-20 06:09:30,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 176. [2021-11-20 06:09:30,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 1.52) internal successors, (266), 175 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:30,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 266 transitions. [2021-11-20 06:09:30,012 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 266 transitions. Word has length 76 [2021-11-20 06:09:30,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:09:30,012 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 266 transitions. [2021-11-20 06:09:30,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:30,013 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 266 transitions. [2021-11-20 06:09:30,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-20 06:09:30,014 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:09:30,015 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2021-11-20 06:09:30,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-20 06:09:30,015 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:09:30,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:09:30,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1115190631, now seen corresponding path program 1 times [2021-11-20 06:09:30,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:09:30,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116116647] [2021-11-20 06:09:30,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:09:30,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:09:30,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:30,089 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:09:30,089 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:09:30,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116116647] [2021-11-20 06:09:30,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116116647] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:09:30,090 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:09:30,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:09:30,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837842194] [2021-11-20 06:09:30,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:09:30,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:09:30,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:09:30,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:09:30,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:09:30,092 INFO L87 Difference]: Start difference. First operand 176 states and 266 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:32,104 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:09:32,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:09:32,462 INFO L93 Difference]: Finished difference Result 348 states and 530 transitions. [2021-11-20 06:09:32,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:09:32,463 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-20 06:09:32,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:09:32,465 INFO L225 Difference]: With dead ends: 348 [2021-11-20 06:09:32,465 INFO L226 Difference]: Without dead ends: 193 [2021-11-20 06:09:32,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:09:32,466 INFO L933 BasicCegarLoop]: 209 mSDtfsCounter, 37 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:09:32,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 535 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 158 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 06:09:32,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-11-20 06:09:32,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 176. [2021-11-20 06:09:32,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 1.5142857142857142) internal successors, (265), 175 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:32,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 265 transitions. [2021-11-20 06:09:32,504 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 265 transitions. Word has length 77 [2021-11-20 06:09:32,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:09:32,504 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 265 transitions. [2021-11-20 06:09:32,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:32,505 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 265 transitions. [2021-11-20 06:09:32,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-20 06:09:32,506 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:09:32,507 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2021-11-20 06:09:32,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-20 06:09:32,507 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:09:32,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:09:32,508 INFO L85 PathProgramCache]: Analyzing trace with hash 533703728, now seen corresponding path program 1 times [2021-11-20 06:09:32,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:09:32,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142170813] [2021-11-20 06:09:32,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:09:32,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:09:32,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:32,610 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:09:32,610 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:09:32,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142170813] [2021-11-20 06:09:32,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142170813] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:09:32,611 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:09:32,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:09:32,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383411583] [2021-11-20 06:09:32,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:09:32,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:09:32,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:09:32,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:09:32,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:09:32,614 INFO L87 Difference]: Start difference. First operand 176 states and 265 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:34,631 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:09:35,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:09:35,003 INFO L93 Difference]: Finished difference Result 348 states and 528 transitions. [2021-11-20 06:09:35,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:09:35,004 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-11-20 06:09:35,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:09:35,006 INFO L225 Difference]: With dead ends: 348 [2021-11-20 06:09:35,006 INFO L226 Difference]: Without dead ends: 193 [2021-11-20 06:09:35,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:09:35,008 INFO L933 BasicCegarLoop]: 209 mSDtfsCounter, 35 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:09:35,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 535 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 158 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 06:09:35,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-11-20 06:09:35,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 176. [2021-11-20 06:09:35,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 1.5085714285714287) internal successors, (264), 175 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:35,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 264 transitions. [2021-11-20 06:09:35,017 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 264 transitions. Word has length 78 [2021-11-20 06:09:35,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:09:35,017 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 264 transitions. [2021-11-20 06:09:35,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:35,018 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 264 transitions. [2021-11-20 06:09:35,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-20 06:09:35,019 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:09:35,019 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2021-11-20 06:09:35,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-20 06:09:35,020 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:09:35,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:09:35,020 INFO L85 PathProgramCache]: Analyzing trace with hash 952241612, now seen corresponding path program 1 times [2021-11-20 06:09:35,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:09:35,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456729079] [2021-11-20 06:09:35,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:09:35,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:09:35,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:35,094 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:09:35,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:09:35,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456729079] [2021-11-20 06:09:35,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456729079] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:09:35,095 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:09:35,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:09:35,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240311694] [2021-11-20 06:09:35,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:09:35,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:09:35,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:09:35,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:09:35,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:09:35,097 INFO L87 Difference]: Start difference. First operand 176 states and 264 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:37,108 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:09:37,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:09:37,423 INFO L93 Difference]: Finished difference Result 338 states and 513 transitions. [2021-11-20 06:09:37,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:09:37,424 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-20 06:09:37,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:09:37,427 INFO L225 Difference]: With dead ends: 338 [2021-11-20 06:09:37,427 INFO L226 Difference]: Without dead ends: 183 [2021-11-20 06:09:37,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:09:37,429 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 26 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:09:37,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 549 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 144 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 06:09:37,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-11-20 06:09:37,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 176. [2021-11-20 06:09:37,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 1.502857142857143) internal successors, (263), 175 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:37,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 263 transitions. [2021-11-20 06:09:37,438 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 263 transitions. Word has length 79 [2021-11-20 06:09:37,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:09:37,438 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 263 transitions. [2021-11-20 06:09:37,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:37,439 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 263 transitions. [2021-11-20 06:09:37,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-20 06:09:37,440 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:09:37,441 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-20 06:09:37,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-20 06:09:37,441 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:09:37,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:09:37,442 INFO L85 PathProgramCache]: Analyzing trace with hash -786994575, now seen corresponding path program 1 times [2021-11-20 06:09:37,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:09:37,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210890262] [2021-11-20 06:09:37,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:09:37,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:09:37,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:37,563 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 06:09:37,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:09:37,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210890262] [2021-11-20 06:09:37,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210890262] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:09:37,564 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:09:37,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:09:37,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808794523] [2021-11-20 06:09:37,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:09:37,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:09:37,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:09:37,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:09:37,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:09:37,569 INFO L87 Difference]: Start difference. First operand 176 states and 263 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:39,579 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:09:40,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:09:40,156 INFO L93 Difference]: Finished difference Result 443 states and 676 transitions. [2021-11-20 06:09:40,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:09:40,157 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-11-20 06:09:40,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:09:40,160 INFO L225 Difference]: With dead ends: 443 [2021-11-20 06:09:40,160 INFO L226 Difference]: Without dead ends: 288 [2021-11-20 06:09:40,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:09:40,162 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 105 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:09:40,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 501 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 269 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2021-11-20 06:09:40,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-11-20 06:09:40,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 217. [2021-11-20 06:09:40,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 1.5601851851851851) internal successors, (337), 216 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:40,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 337 transitions. [2021-11-20 06:09:40,173 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 337 transitions. Word has length 84 [2021-11-20 06:09:40,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:09:40,174 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 337 transitions. [2021-11-20 06:09:40,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:40,175 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 337 transitions. [2021-11-20 06:09:40,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-20 06:09:40,176 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:09:40,176 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-20 06:09:40,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-20 06:09:40,177 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:09:40,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:09:40,178 INFO L85 PathProgramCache]: Analyzing trace with hash -363347853, now seen corresponding path program 1 times [2021-11-20 06:09:40,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:09:40,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046752754] [2021-11-20 06:09:40,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:09:40,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:09:40,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:40,262 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 06:09:40,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:09:40,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046752754] [2021-11-20 06:09:40,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046752754] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:09:40,264 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:09:40,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:09:40,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243920223] [2021-11-20 06:09:40,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:09:40,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:09:40,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:09:40,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:09:40,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:09:40,266 INFO L87 Difference]: Start difference. First operand 217 states and 337 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:42,279 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:09:42,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:09:42,748 INFO L93 Difference]: Finished difference Result 463 states and 726 transitions. [2021-11-20 06:09:42,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:09:42,750 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-11-20 06:09:42,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:09:42,752 INFO L225 Difference]: With dead ends: 463 [2021-11-20 06:09:42,752 INFO L226 Difference]: Without dead ends: 267 [2021-11-20 06:09:42,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:09:42,754 INFO L933 BasicCegarLoop]: 261 mSDtfsCounter, 42 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 639 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:09:42,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 639 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 185 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 06:09:42,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-11-20 06:09:42,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 241. [2021-11-20 06:09:42,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 1.5791666666666666) internal successors, (379), 240 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:42,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 379 transitions. [2021-11-20 06:09:42,766 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 379 transitions. Word has length 84 [2021-11-20 06:09:42,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:09:42,766 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 379 transitions. [2021-11-20 06:09:42,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:42,767 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 379 transitions. [2021-11-20 06:09:42,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-20 06:09:42,768 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:09:42,769 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-20 06:09:42,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-20 06:09:42,769 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:09:42,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:09:42,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1809042218, now seen corresponding path program 1 times [2021-11-20 06:09:42,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:09:42,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990121405] [2021-11-20 06:09:42,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:09:42,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:09:42,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:42,890 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 06:09:42,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:09:42,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990121405] [2021-11-20 06:09:42,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990121405] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:09:42,892 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:09:42,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:09:42,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185377222] [2021-11-20 06:09:42,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:09:42,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:09:42,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:09:42,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:09:42,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:09:42,894 INFO L87 Difference]: Start difference. First operand 241 states and 379 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:44,905 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:09:45,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:09:45,373 INFO L93 Difference]: Finished difference Result 524 states and 822 transitions. [2021-11-20 06:09:45,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:09:45,373 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-11-20 06:09:45,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:09:45,376 INFO L225 Difference]: With dead ends: 524 [2021-11-20 06:09:45,376 INFO L226 Difference]: Without dead ends: 304 [2021-11-20 06:09:45,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:09:45,378 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 94 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:09:45,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 485 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 262 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2021-11-20 06:09:45,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-11-20 06:09:45,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 242. [2021-11-20 06:09:45,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 1.5767634854771784) internal successors, (380), 241 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:45,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 380 transitions. [2021-11-20 06:09:45,390 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 380 transitions. Word has length 85 [2021-11-20 06:09:45,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:09:45,390 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 380 transitions. [2021-11-20 06:09:45,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:45,391 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 380 transitions. [2021-11-20 06:09:45,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-20 06:09:45,392 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:09:45,393 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2021-11-20 06:09:45,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-20 06:09:45,393 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:09:45,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:09:45,394 INFO L85 PathProgramCache]: Analyzing trace with hash -483308059, now seen corresponding path program 1 times [2021-11-20 06:09:45,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:09:45,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967825257] [2021-11-20 06:09:45,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:09:45,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:09:45,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:45,478 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 06:09:45,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:09:45,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967825257] [2021-11-20 06:09:45,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967825257] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:09:45,479 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:09:45,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:09:45,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269102318] [2021-11-20 06:09:45,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:09:45,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:09:45,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:09:45,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:09:45,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:09:45,482 INFO L87 Difference]: Start difference. First operand 242 states and 380 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:47,494 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:09:47,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:09:47,981 INFO L93 Difference]: Finished difference Result 525 states and 822 transitions. [2021-11-20 06:09:47,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:09:47,984 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-11-20 06:09:47,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:09:47,986 INFO L225 Difference]: With dead ends: 525 [2021-11-20 06:09:47,986 INFO L226 Difference]: Without dead ends: 304 [2021-11-20 06:09:47,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:09:47,988 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 117 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:09:47,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 487 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 264 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2021-11-20 06:09:47,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-11-20 06:09:47,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 242. [2021-11-20 06:09:47,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 1.5726141078838174) internal successors, (379), 241 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:48,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 379 transitions. [2021-11-20 06:09:48,001 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 379 transitions. Word has length 97 [2021-11-20 06:09:48,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:09:48,002 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 379 transitions. [2021-11-20 06:09:48,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:48,002 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 379 transitions. [2021-11-20 06:09:48,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-20 06:09:48,004 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:09:48,005 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2021-11-20 06:09:48,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-20 06:09:48,005 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:09:48,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:09:48,006 INFO L85 PathProgramCache]: Analyzing trace with hash 392710947, now seen corresponding path program 1 times [2021-11-20 06:09:48,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:09:48,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800464288] [2021-11-20 06:09:48,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:09:48,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:09:48,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:48,132 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 06:09:48,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:09:48,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800464288] [2021-11-20 06:09:48,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800464288] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:09:48,133 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:09:48,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:09:48,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842615938] [2021-11-20 06:09:48,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:09:48,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:09:48,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:09:48,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:09:48,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:09:48,135 INFO L87 Difference]: Start difference. First operand 242 states and 379 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:49,878 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:09:50,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:09:50,299 INFO L93 Difference]: Finished difference Result 489 states and 767 transitions. [2021-11-20 06:09:50,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:09:50,300 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-11-20 06:09:50,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:09:50,303 INFO L225 Difference]: With dead ends: 489 [2021-11-20 06:09:50,303 INFO L226 Difference]: Without dead ends: 268 [2021-11-20 06:09:50,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:09:50,304 INFO L933 BasicCegarLoop]: 261 mSDtfsCounter, 49 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 639 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:09:50,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 639 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-20 06:09:50,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-11-20 06:09:50,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 242. [2021-11-20 06:09:50,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 1.5684647302904564) internal successors, (378), 241 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:50,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 378 transitions. [2021-11-20 06:09:50,315 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 378 transitions. Word has length 97 [2021-11-20 06:09:50,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:09:50,315 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 378 transitions. [2021-11-20 06:09:50,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:50,316 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 378 transitions. [2021-11-20 06:09:50,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-20 06:09:50,317 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:09:50,318 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-20 06:09:50,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-20 06:09:50,318 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:09:50,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:09:50,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1671733648, now seen corresponding path program 1 times [2021-11-20 06:09:50,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:09:50,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829031819] [2021-11-20 06:09:50,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:09:50,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:09:50,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:50,410 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 06:09:50,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:09:50,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829031819] [2021-11-20 06:09:50,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829031819] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:09:50,411 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:09:50,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:09:50,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783451891] [2021-11-20 06:09:50,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:09:50,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:09:50,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:09:50,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:09:50,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:09:50,414 INFO L87 Difference]: Start difference. First operand 242 states and 378 transitions. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:52,429 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:09:52,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:09:52,882 INFO L93 Difference]: Finished difference Result 524 states and 817 transitions. [2021-11-20 06:09:52,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:09:52,883 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-11-20 06:09:52,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:09:52,886 INFO L225 Difference]: With dead ends: 524 [2021-11-20 06:09:52,886 INFO L226 Difference]: Without dead ends: 303 [2021-11-20 06:09:52,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:09:52,888 INFO L933 BasicCegarLoop]: 184 mSDtfsCounter, 121 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:09:52,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 485 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 261 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 06:09:52,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-11-20 06:09:52,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 242. [2021-11-20 06:09:52,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 1.5643153526970954) internal successors, (377), 241 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:52,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 377 transitions. [2021-11-20 06:09:52,900 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 377 transitions. Word has length 98 [2021-11-20 06:09:52,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:09:52,901 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 377 transitions. [2021-11-20 06:09:52,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:52,901 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 377 transitions. [2021-11-20 06:09:52,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-20 06:09:52,903 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:09:52,903 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-20 06:09:52,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-20 06:09:52,904 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:09:52,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:09:52,905 INFO L85 PathProgramCache]: Analyzing trace with hash -736330204, now seen corresponding path program 1 times [2021-11-20 06:09:52,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:09:52,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459360061] [2021-11-20 06:09:52,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:09:52,906 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:09:52,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:53,016 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-20 06:09:53,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:09:53,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459360061] [2021-11-20 06:09:53,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459360061] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:09:53,017 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:09:53,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 06:09:53,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80242744] [2021-11-20 06:09:53,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:09:53,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:09:53,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:09:53,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:09:53,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:09:53,020 INFO L87 Difference]: Start difference. First operand 242 states and 377 transitions. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:55,034 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:09:57,056 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:09:57,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:09:57,517 INFO L93 Difference]: Finished difference Result 484 states and 759 transitions. [2021-11-20 06:09:57,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:09:57,518 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-11-20 06:09:57,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:09:57,521 INFO L225 Difference]: With dead ends: 484 [2021-11-20 06:09:57,521 INFO L226 Difference]: Without dead ends: 263 [2021-11-20 06:09:57,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:09:57,523 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 162 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 42 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:09:57,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 392 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 310 Invalid, 2 Unknown, 0 Unchecked, 4.5s Time] [2021-11-20 06:09:57,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-11-20 06:09:57,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 262. [2021-11-20 06:09:57,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 1.5440613026819923) internal successors, (403), 261 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:57,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 403 transitions. [2021-11-20 06:09:57,535 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 403 transitions. Word has length 98 [2021-11-20 06:09:57,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:09:57,536 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 403 transitions. [2021-11-20 06:09:57,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:57,536 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 403 transitions. [2021-11-20 06:09:57,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-20 06:09:57,538 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:09:57,539 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2021-11-20 06:09:57,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-20 06:09:57,539 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:09:57,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:09:57,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1588446981, now seen corresponding path program 1 times [2021-11-20 06:09:57,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:09:57,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121796646] [2021-11-20 06:09:57,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:09:57,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:09:57,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:57,623 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 06:09:57,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:09:57,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121796646] [2021-11-20 06:09:57,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121796646] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:09:57,624 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:09:57,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:09:57,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18602945] [2021-11-20 06:09:57,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:09:57,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:09:57,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:09:57,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:09:57,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:09:57,627 INFO L87 Difference]: Start difference. First operand 262 states and 403 transitions. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:59,501 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:09:59,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:09:59,973 INFO L93 Difference]: Finished difference Result 563 states and 865 transitions. [2021-11-20 06:09:59,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:09:59,974 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-11-20 06:09:59,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:09:59,976 INFO L225 Difference]: With dead ends: 563 [2021-11-20 06:09:59,977 INFO L226 Difference]: Without dead ends: 322 [2021-11-20 06:09:59,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:09:59,979 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 113 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:09:59,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 489 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 06:09:59,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-11-20 06:09:59,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 262. [2021-11-20 06:09:59,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 1.5402298850574712) internal successors, (402), 261 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:59,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 402 transitions. [2021-11-20 06:09:59,992 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 402 transitions. Word has length 98 [2021-11-20 06:09:59,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:09:59,993 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 402 transitions. [2021-11-20 06:09:59,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:59,993 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 402 transitions. [2021-11-20 06:09:59,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-20 06:09:59,995 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:09:59,996 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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] [2021-11-20 06:09:59,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-20 06:09:59,996 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:09:59,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:09:59,997 INFO L85 PathProgramCache]: Analyzing trace with hash 703300027, now seen corresponding path program 1 times [2021-11-20 06:09:59,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:09:59,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237774852] [2021-11-20 06:09:59,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:09:59,998 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:10:00,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:10:00,083 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 06:10:00,083 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:10:00,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237774852] [2021-11-20 06:10:00,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237774852] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:10:00,084 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:10:00,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:10:00,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116772179] [2021-11-20 06:10:00,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:10:00,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:10:00,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:10:00,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:10:00,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:10:00,086 INFO L87 Difference]: Start difference. First operand 262 states and 402 transitions. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:02,097 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:10:02,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:10:02,534 INFO L93 Difference]: Finished difference Result 561 states and 861 transitions. [2021-11-20 06:10:02,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:10:02,535 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-11-20 06:10:02,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:10:02,537 INFO L225 Difference]: With dead ends: 561 [2021-11-20 06:10:02,537 INFO L226 Difference]: Without dead ends: 320 [2021-11-20 06:10:02,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:10:02,539 INFO L933 BasicCegarLoop]: 188 mSDtfsCounter, 113 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:10:02,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 493 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 253 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 06:10:02,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-11-20 06:10:02,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 262. [2021-11-20 06:10:02,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 1.5363984674329503) internal successors, (401), 261 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:02,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 401 transitions. [2021-11-20 06:10:02,553 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 401 transitions. Word has length 98 [2021-11-20 06:10:02,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:10:02,554 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 401 transitions. [2021-11-20 06:10:02,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:02,554 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 401 transitions. [2021-11-20 06:10:02,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-20 06:10:02,556 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:10:02,556 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2021-11-20 06:10:02,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-20 06:10:02,557 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:10:02,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:10:02,557 INFO L85 PathProgramCache]: Analyzing trace with hash -201661571, now seen corresponding path program 1 times [2021-11-20 06:10:02,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:10:02,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119597317] [2021-11-20 06:10:02,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:10:02,558 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:10:02,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:10:02,636 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 06:10:02,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:10:02,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119597317] [2021-11-20 06:10:02,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119597317] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:10:02,637 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:10:02,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:10:02,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286199349] [2021-11-20 06:10:02,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:10:02,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:10:02,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:10:02,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:10:02,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:10:02,640 INFO L87 Difference]: Start difference. First operand 262 states and 401 transitions. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:04,652 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:10:05,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:10:05,046 INFO L93 Difference]: Finished difference Result 527 states and 808 transitions. [2021-11-20 06:10:05,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:10:05,047 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-11-20 06:10:05,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:10:05,049 INFO L225 Difference]: With dead ends: 527 [2021-11-20 06:10:05,050 INFO L226 Difference]: Without dead ends: 286 [2021-11-20 06:10:05,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:10:05,051 INFO L933 BasicCegarLoop]: 256 mSDtfsCounter, 45 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:10:05,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 629 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 174 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 06:10:05,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-11-20 06:10:05,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 262. [2021-11-20 06:10:05,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 1.5325670498084292) internal successors, (400), 261 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:05,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 400 transitions. [2021-11-20 06:10:05,064 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 400 transitions. Word has length 98 [2021-11-20 06:10:05,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:10:05,065 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 400 transitions. [2021-11-20 06:10:05,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:05,065 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 400 transitions. [2021-11-20 06:10:05,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-20 06:10:05,066 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:10:05,067 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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] [2021-11-20 06:10:05,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-20 06:10:05,067 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:10:05,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:10:05,068 INFO L85 PathProgramCache]: Analyzing trace with hash 2090085437, now seen corresponding path program 1 times [2021-11-20 06:10:05,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:10:05,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185874847] [2021-11-20 06:10:05,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:10:05,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:10:05,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:10:05,149 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 06:10:05,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:10:05,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185874847] [2021-11-20 06:10:05,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185874847] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:10:05,150 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:10:05,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:10:05,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145944275] [2021-11-20 06:10:05,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:10:05,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:10:05,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:10:05,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:10:05,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:10:05,153 INFO L87 Difference]: Start difference. First operand 262 states and 400 transitions. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:07,167 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:10:07,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:10:07,556 INFO L93 Difference]: Finished difference Result 525 states and 804 transitions. [2021-11-20 06:10:07,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:10:07,557 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-11-20 06:10:07,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:10:07,560 INFO L225 Difference]: With dead ends: 525 [2021-11-20 06:10:07,560 INFO L226 Difference]: Without dead ends: 284 [2021-11-20 06:10:07,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:10:07,562 INFO L933 BasicCegarLoop]: 258 mSDtfsCounter, 45 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 633 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:10:07,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 633 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 170 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 06:10:07,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-11-20 06:10:07,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 262. [2021-11-20 06:10:07,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 1.528735632183908) internal successors, (399), 261 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:07,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 399 transitions. [2021-11-20 06:10:07,575 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 399 transitions. Word has length 98 [2021-11-20 06:10:07,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:10:07,575 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 399 transitions. [2021-11-20 06:10:07,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:07,576 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 399 transitions. [2021-11-20 06:10:07,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-20 06:10:07,577 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:10:07,578 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-20 06:10:07,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-11-20 06:10:07,578 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:10:07,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:10:07,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1631270527, now seen corresponding path program 1 times [2021-11-20 06:10:07,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:10:07,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264101562] [2021-11-20 06:10:07,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:10:07,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:10:07,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:10:07,662 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 06:10:07,663 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:10:07,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264101562] [2021-11-20 06:10:07,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264101562] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:10:07,663 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:10:07,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:10:07,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68747010] [2021-11-20 06:10:07,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:10:07,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:10:07,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:10:07,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:10:07,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:10:07,666 INFO L87 Difference]: Start difference. First operand 262 states and 399 transitions. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:09,676 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:10:10,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:10:10,179 INFO L93 Difference]: Finished difference Result 561 states and 855 transitions. [2021-11-20 06:10:10,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:10:10,180 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2021-11-20 06:10:10,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:10:10,183 INFO L225 Difference]: With dead ends: 561 [2021-11-20 06:10:10,183 INFO L226 Difference]: Without dead ends: 320 [2021-11-20 06:10:10,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:10:10,185 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 117 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:10:10,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 517 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 254 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2021-11-20 06:10:10,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-11-20 06:10:10,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 262. [2021-11-20 06:10:10,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 1.524904214559387) internal successors, (398), 261 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:10,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 398 transitions. [2021-11-20 06:10:10,198 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 398 transitions. Word has length 99 [2021-11-20 06:10:10,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:10:10,198 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 398 transitions. [2021-11-20 06:10:10,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:10,199 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 398 transitions. [2021-11-20 06:10:10,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-20 06:10:10,200 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:10:10,201 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-20 06:10:10,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-11-20 06:10:10,201 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:10:10,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:10:10,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1590595777, now seen corresponding path program 1 times [2021-11-20 06:10:10,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:10:10,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144051873] [2021-11-20 06:10:10,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:10:10,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:10:10,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:10:10,280 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 06:10:10,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:10:10,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144051873] [2021-11-20 06:10:10,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144051873] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:10:10,281 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:10:10,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:10:10,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836869244] [2021-11-20 06:10:10,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:10:10,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:10:10,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:10:10,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:10:10,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:10:10,284 INFO L87 Difference]: Start difference. First operand 262 states and 398 transitions. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:12,294 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:10:12,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:10:12,726 INFO L93 Difference]: Finished difference Result 525 states and 800 transitions. [2021-11-20 06:10:12,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:10:12,727 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2021-11-20 06:10:12,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:10:12,730 INFO L225 Difference]: With dead ends: 525 [2021-11-20 06:10:12,730 INFO L226 Difference]: Without dead ends: 284 [2021-11-20 06:10:12,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:10:12,731 INFO L933 BasicCegarLoop]: 257 mSDtfsCounter, 49 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 631 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:10:12,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 631 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 170 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 06:10:12,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-11-20 06:10:12,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 262. [2021-11-20 06:10:12,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 1.5210727969348659) internal successors, (397), 261 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:12,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 397 transitions. [2021-11-20 06:10:12,744 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 397 transitions. Word has length 99 [2021-11-20 06:10:12,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:10:12,744 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 397 transitions. [2021-11-20 06:10:12,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:12,745 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 397 transitions. [2021-11-20 06:10:12,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-20 06:10:12,746 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:10:12,747 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-20 06:10:12,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-11-20 06:10:12,747 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:10:12,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:10:12,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1632043287, now seen corresponding path program 1 times [2021-11-20 06:10:12,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:10:12,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925693519] [2021-11-20 06:10:12,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:10:12,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:10:12,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:10:12,836 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 06:10:12,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:10:12,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925693519] [2021-11-20 06:10:12,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925693519] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:10:12,838 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:10:12,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:10:12,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95766759] [2021-11-20 06:10:12,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:10:12,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:10:12,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:10:12,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:10:12,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:10:12,840 INFO L87 Difference]: Start difference. First operand 262 states and 397 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:14,851 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:10:15,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:10:15,382 INFO L93 Difference]: Finished difference Result 561 states and 851 transitions. [2021-11-20 06:10:15,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:10:15,383 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-11-20 06:10:15,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:10:15,386 INFO L225 Difference]: With dead ends: 561 [2021-11-20 06:10:15,386 INFO L226 Difference]: Without dead ends: 320 [2021-11-20 06:10:15,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:10:15,388 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 115 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:10:15,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 517 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 254 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2021-11-20 06:10:15,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-11-20 06:10:15,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 262. [2021-11-20 06:10:15,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 1.5172413793103448) internal successors, (396), 261 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:15,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 396 transitions. [2021-11-20 06:10:15,402 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 396 transitions. Word has length 100 [2021-11-20 06:10:15,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:10:15,402 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 396 transitions. [2021-11-20 06:10:15,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:15,403 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 396 transitions. [2021-11-20 06:10:15,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-20 06:10:15,404 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:10:15,404 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-20 06:10:15,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-11-20 06:10:15,405 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:10:15,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:10:15,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1402006759, now seen corresponding path program 1 times [2021-11-20 06:10:15,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:10:15,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296139032] [2021-11-20 06:10:15,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:10:15,407 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:10:15,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:10:15,486 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 06:10:15,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:10:15,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296139032] [2021-11-20 06:10:15,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296139032] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:10:15,487 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:10:15,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:10:15,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822514397] [2021-11-20 06:10:15,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:10:15,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:10:15,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:10:15,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:10:15,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:10:15,489 INFO L87 Difference]: Start difference. First operand 262 states and 396 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:17,500 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:10:17,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:10:17,870 INFO L93 Difference]: Finished difference Result 525 states and 796 transitions. [2021-11-20 06:10:17,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:10:17,871 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-11-20 06:10:17,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:10:17,873 INFO L225 Difference]: With dead ends: 525 [2021-11-20 06:10:17,873 INFO L226 Difference]: Without dead ends: 284 [2021-11-20 06:10:17,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:10:17,875 INFO L933 BasicCegarLoop]: 256 mSDtfsCounter, 47 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:10:17,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 629 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 170 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 06:10:17,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-11-20 06:10:17,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 262. [2021-11-20 06:10:17,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 1.5134099616858236) internal successors, (395), 261 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:17,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 395 transitions. [2021-11-20 06:10:17,888 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 395 transitions. Word has length 100 [2021-11-20 06:10:17,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:10:17,889 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 395 transitions. [2021-11-20 06:10:17,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:17,889 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 395 transitions. [2021-11-20 06:10:17,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-20 06:10:17,891 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:10:17,891 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-20 06:10:17,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-11-20 06:10:17,892 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:10:17,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:10:17,892 INFO L85 PathProgramCache]: Analyzing trace with hash 268494236, now seen corresponding path program 1 times [2021-11-20 06:10:17,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:10:17,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519475219] [2021-11-20 06:10:17,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:10:17,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:10:17,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:10:17,971 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 06:10:17,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:10:17,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519475219] [2021-11-20 06:10:17,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519475219] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:10:17,973 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:10:17,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:10:17,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521637356] [2021-11-20 06:10:17,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:10:17,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:10:17,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:10:17,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:10:17,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:10:17,975 INFO L87 Difference]: Start difference. First operand 262 states and 395 transitions. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:19,986 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:10:20,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:10:20,457 INFO L93 Difference]: Finished difference Result 561 states and 847 transitions. [2021-11-20 06:10:20,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:10:20,458 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2021-11-20 06:10:20,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:10:20,460 INFO L225 Difference]: With dead ends: 561 [2021-11-20 06:10:20,460 INFO L226 Difference]: Without dead ends: 320 [2021-11-20 06:10:20,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:10:20,462 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 113 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:10:20,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 517 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 254 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2021-11-20 06:10:20,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-11-20 06:10:20,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 262. [2021-11-20 06:10:20,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 1.5095785440613028) internal successors, (394), 261 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:20,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 394 transitions. [2021-11-20 06:10:20,475 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 394 transitions. Word has length 101 [2021-11-20 06:10:20,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:10:20,475 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 394 transitions. [2021-11-20 06:10:20,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:20,476 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 394 transitions. [2021-11-20 06:10:20,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-20 06:10:20,477 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:10:20,477 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-20 06:10:20,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-11-20 06:10:20,478 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:10:20,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:10:20,479 INFO L85 PathProgramCache]: Analyzing trace with hash 702223322, now seen corresponding path program 1 times [2021-11-20 06:10:20,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:10:20,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160943069] [2021-11-20 06:10:20,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:10:20,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:10:20,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:10:20,557 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 06:10:20,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:10:20,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160943069] [2021-11-20 06:10:20,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160943069] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:10:20,558 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:10:20,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:10:20,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719269467] [2021-11-20 06:10:20,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:10:20,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:10:20,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:10:20,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:10:20,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:10:20,560 INFO L87 Difference]: Start difference. First operand 262 states and 394 transitions. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:21,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:10:21,826 INFO L93 Difference]: Finished difference Result 525 states and 792 transitions. [2021-11-20 06:10:21,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:10:21,827 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2021-11-20 06:10:21,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:10:21,830 INFO L225 Difference]: With dead ends: 525 [2021-11-20 06:10:21,830 INFO L226 Difference]: Without dead ends: 284 [2021-11-20 06:10:21,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:10:21,831 INFO L933 BasicCegarLoop]: 255 mSDtfsCounter, 45 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 627 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:10:21,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 627 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-20 06:10:21,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-11-20 06:10:21,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 262. [2021-11-20 06:10:21,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 1.5057471264367817) internal successors, (393), 261 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:21,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 393 transitions. [2021-11-20 06:10:21,846 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 393 transitions. Word has length 101 [2021-11-20 06:10:21,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:10:21,846 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 393 transitions. [2021-11-20 06:10:21,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:21,847 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 393 transitions. [2021-11-20 06:10:21,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-20 06:10:21,848 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:10:21,849 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-20 06:10:21,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-11-20 06:10:21,849 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:10:21,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:10:21,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1501084434, now seen corresponding path program 1 times [2021-11-20 06:10:21,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:10:21,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596196464] [2021-11-20 06:10:21,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:10:21,851 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:10:21,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:10:21,933 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 06:10:21,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:10:21,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596196464] [2021-11-20 06:10:21,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596196464] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:10:21,935 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:10:21,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:10:21,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015889452] [2021-11-20 06:10:21,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:10:21,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:10:21,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:10:21,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:10:21,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:10:21,940 INFO L87 Difference]: Start difference. First operand 262 states and 393 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:23,953 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:10:24,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:10:24,416 INFO L93 Difference]: Finished difference Result 551 states and 831 transitions. [2021-11-20 06:10:24,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:10:24,416 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2021-11-20 06:10:24,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:10:24,418 INFO L225 Difference]: With dead ends: 551 [2021-11-20 06:10:24,419 INFO L226 Difference]: Without dead ends: 310 [2021-11-20 06:10:24,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:10:24,421 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 104 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:10:24,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 505 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 241 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 06:10:24,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-11-20 06:10:24,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 262. [2021-11-20 06:10:24,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 1.5019157088122606) internal successors, (392), 261 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:24,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 392 transitions. [2021-11-20 06:10:24,435 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 392 transitions. Word has length 102 [2021-11-20 06:10:24,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:10:24,435 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 392 transitions. [2021-11-20 06:10:24,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:24,436 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 392 transitions. [2021-11-20 06:10:24,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-20 06:10:24,437 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:10:24,438 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-20 06:10:24,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-11-20 06:10:24,438 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:10:24,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:10:24,439 INFO L85 PathProgramCache]: Analyzing trace with hash 2061784212, now seen corresponding path program 1 times [2021-11-20 06:10:24,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:10:24,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636254265] [2021-11-20 06:10:24,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:10:24,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:10:24,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:10:24,517 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 06:10:24,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:10:24,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636254265] [2021-11-20 06:10:24,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636254265] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:10:24,519 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:10:24,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:10:24,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681807000] [2021-11-20 06:10:24,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:10:24,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:10:24,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:10:24,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:10:24,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:10:24,524 INFO L87 Difference]: Start difference. First operand 262 states and 392 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:26,535 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:10:26,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:10:26,888 INFO L93 Difference]: Finished difference Result 515 states and 776 transitions. [2021-11-20 06:10:26,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:10:26,897 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2021-11-20 06:10:26,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:10:26,899 INFO L225 Difference]: With dead ends: 515 [2021-11-20 06:10:26,900 INFO L226 Difference]: Without dead ends: 274 [2021-11-20 06:10:26,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:10:26,901 INFO L933 BasicCegarLoop]: 248 mSDtfsCounter, 36 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 613 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:10:26,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 613 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 157 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 06:10:26,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-11-20 06:10:26,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 262. [2021-11-20 06:10:26,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 1.4980842911877394) internal successors, (391), 261 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:26,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 391 transitions. [2021-11-20 06:10:26,929 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 391 transitions. Word has length 102 [2021-11-20 06:10:26,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:10:26,930 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 391 transitions. [2021-11-20 06:10:26,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:26,930 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 391 transitions. [2021-11-20 06:10:26,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-20 06:10:26,932 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:10:26,932 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2021-11-20 06:10:26,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-11-20 06:10:26,933 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:10:26,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:10:26,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1732209368, now seen corresponding path program 1 times [2021-11-20 06:10:26,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:10:26,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703811459] [2021-11-20 06:10:26,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:10:26,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:10:26,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:10:27,022 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 06:10:27,022 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:10:27,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703811459] [2021-11-20 06:10:27,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703811459] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:10:27,023 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:10:27,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:10:27,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95874630] [2021-11-20 06:10:27,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:10:27,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:10:27,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:10:27,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:10:27,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:10:27,026 INFO L87 Difference]: Start difference. First operand 262 states and 391 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:29,036 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:10:29,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:10:29,442 INFO L93 Difference]: Finished difference Result 551 states and 827 transitions. [2021-11-20 06:10:29,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:10:29,443 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-11-20 06:10:29,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:10:29,445 INFO L225 Difference]: With dead ends: 551 [2021-11-20 06:10:29,445 INFO L226 Difference]: Without dead ends: 310 [2021-11-20 06:10:29,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:10:29,446 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 94 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:10:29,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 521 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 241 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 06:10:29,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-11-20 06:10:29,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 262. [2021-11-20 06:10:29,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 1.4942528735632183) internal successors, (390), 261 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:29,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 390 transitions. [2021-11-20 06:10:29,459 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 390 transitions. Word has length 106 [2021-11-20 06:10:29,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:10:29,460 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 390 transitions. [2021-11-20 06:10:29,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:29,460 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 390 transitions. [2021-11-20 06:10:29,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-20 06:10:29,462 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:10:29,462 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2021-11-20 06:10:29,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-11-20 06:10:29,463 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:10:29,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:10:29,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1314812762, now seen corresponding path program 1 times [2021-11-20 06:10:29,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:10:29,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408677118] [2021-11-20 06:10:29,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:10:29,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:10:29,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:10:29,537 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-20 06:10:29,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:10:29,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408677118] [2021-11-20 06:10:29,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408677118] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:10:29,538 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:10:29,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:10:29,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765919626] [2021-11-20 06:10:29,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:10:29,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:10:29,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:10:29,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:10:29,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:10:29,540 INFO L87 Difference]: Start difference. First operand 262 states and 390 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:29,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:10:29,630 INFO L93 Difference]: Finished difference Result 741 states and 1118 transitions. [2021-11-20 06:10:29,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:10:29,631 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-11-20 06:10:29,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:10:29,635 INFO L225 Difference]: With dead ends: 741 [2021-11-20 06:10:29,635 INFO L226 Difference]: Without dead ends: 500 [2021-11-20 06:10:29,636 INFO L932 BasicCegarLoop]: 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 [2021-11-20 06:10:29,636 INFO L933 BasicCegarLoop]: 251 mSDtfsCounter, 145 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:10:29,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 440 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:10:29,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-11-20 06:10:29,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 500. [2021-11-20 06:10:29,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 499 states have (on average 1.4769539078156313) internal successors, (737), 499 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:29,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 737 transitions. [2021-11-20 06:10:29,659 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 737 transitions. Word has length 106 [2021-11-20 06:10:29,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:10:29,659 INFO L470 AbstractCegarLoop]: Abstraction has 500 states and 737 transitions. [2021-11-20 06:10:29,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:29,660 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 737 transitions. [2021-11-20 06:10:29,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-20 06:10:29,662 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:10:29,662 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2021-11-20 06:10:29,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-11-20 06:10:29,663 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:10:29,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:10:29,664 INFO L85 PathProgramCache]: Analyzing trace with hash -371367076, now seen corresponding path program 1 times [2021-11-20 06:10:29,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:10:29,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892740925] [2021-11-20 06:10:29,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:10:29,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:10:29,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:10:29,756 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-20 06:10:29,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:10:29,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892740925] [2021-11-20 06:10:29,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892740925] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:10:29,757 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:10:29,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:10:29,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277399470] [2021-11-20 06:10:29,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:10:29,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:10:29,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:10:29,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:10:29,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:10:29,761 INFO L87 Difference]: Start difference. First operand 500 states and 737 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:29,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:10:29,827 INFO L93 Difference]: Finished difference Result 1006 states and 1486 transitions. [2021-11-20 06:10:29,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:10:29,828 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-11-20 06:10:29,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:10:29,831 INFO L225 Difference]: With dead ends: 1006 [2021-11-20 06:10:29,832 INFO L226 Difference]: Without dead ends: 527 [2021-11-20 06:10:29,833 INFO L932 BasicCegarLoop]: 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 [2021-11-20 06:10:29,834 INFO L933 BasicCegarLoop]: 233 mSDtfsCounter, 15 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:10:29,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 422 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:10:29,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2021-11-20 06:10:29,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 527. [2021-11-20 06:10:29,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 526 states have (on average 1.467680608365019) internal successors, (772), 526 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:29,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 772 transitions. [2021-11-20 06:10:29,859 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 772 transitions. Word has length 106 [2021-11-20 06:10:29,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:10:29,859 INFO L470 AbstractCegarLoop]: Abstraction has 527 states and 772 transitions. [2021-11-20 06:10:29,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:29,860 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 772 transitions. [2021-11-20 06:10:29,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-20 06:10:29,862 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:10:29,862 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2021-11-20 06:10:29,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-11-20 06:10:29,863 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:10:29,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:10:29,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1505115742, now seen corresponding path program 1 times [2021-11-20 06:10:29,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:10:29,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271212762] [2021-11-20 06:10:29,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:10:29,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:10:29,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:10:29,926 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-20 06:10:29,926 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:10:29,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271212762] [2021-11-20 06:10:29,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271212762] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:10:29,927 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:10:29,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:10:29,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337975010] [2021-11-20 06:10:29,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:10:29,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:10:29,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:10:29,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:10:29,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:10:29,932 INFO L87 Difference]: Start difference. First operand 527 states and 772 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:29,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:10:29,988 INFO L93 Difference]: Finished difference Result 1035 states and 1522 transitions. [2021-11-20 06:10:29,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:10:29,989 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-11-20 06:10:29,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:10:29,993 INFO L225 Difference]: With dead ends: 1035 [2021-11-20 06:10:29,993 INFO L226 Difference]: Without dead ends: 529 [2021-11-20 06:10:29,997 INFO L932 BasicCegarLoop]: 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 [2021-11-20 06:10:29,998 INFO L933 BasicCegarLoop]: 221 mSDtfsCounter, 4 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:10:29,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 401 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:10:30,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2021-11-20 06:10:30,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 529. [2021-11-20 06:10:30,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 528 states have (on average 1.4659090909090908) internal successors, (774), 528 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:30,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 774 transitions. [2021-11-20 06:10:30,021 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 774 transitions. Word has length 106 [2021-11-20 06:10:30,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:10:30,022 INFO L470 AbstractCegarLoop]: Abstraction has 529 states and 774 transitions. [2021-11-20 06:10:30,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:30,022 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 774 transitions. [2021-11-20 06:10:30,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-20 06:10:30,024 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:10:30,025 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2021-11-20 06:10:30,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-11-20 06:10:30,026 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:10:30,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:10:30,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1635291780, now seen corresponding path program 1 times [2021-11-20 06:10:30,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:10:30,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102194625] [2021-11-20 06:10:30,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:10:30,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:10:30,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:10:30,133 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-20 06:10:30,133 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:10:30,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102194625] [2021-11-20 06:10:30,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102194625] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:10:30,134 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:10:30,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:10:30,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713850178] [2021-11-20 06:10:30,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:10:30,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:10:30,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:10:30,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:10:30,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:10:30,136 INFO L87 Difference]: Start difference. First operand 529 states and 774 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:30,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:10:30,247 INFO L93 Difference]: Finished difference Result 1273 states and 1884 transitions. [2021-11-20 06:10:30,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:10:30,248 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2021-11-20 06:10:30,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:10:30,252 INFO L225 Difference]: With dead ends: 1273 [2021-11-20 06:10:30,252 INFO L226 Difference]: Without dead ends: 767 [2021-11-20 06:10:30,253 INFO L932 BasicCegarLoop]: 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 [2021-11-20 06:10:30,255 INFO L933 BasicCegarLoop]: 393 mSDtfsCounter, 150 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:10:30,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 582 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:10:30,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2021-11-20 06:10:30,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 767. [2021-11-20 06:10:30,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 767 states, 766 states have (on average 1.4634464751958225) internal successors, (1121), 766 states have internal predecessors, (1121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:30,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 767 states to 767 states and 1121 transitions. [2021-11-20 06:10:30,303 INFO L78 Accepts]: Start accepts. Automaton has 767 states and 1121 transitions. Word has length 108 [2021-11-20 06:10:30,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:10:30,304 INFO L470 AbstractCegarLoop]: Abstraction has 767 states and 1121 transitions. [2021-11-20 06:10:30,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:30,304 INFO L276 IsEmpty]: Start isEmpty. Operand 767 states and 1121 transitions. [2021-11-20 06:10:30,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-20 06:10:30,307 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:10:30,308 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2021-11-20 06:10:30,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-11-20 06:10:30,309 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:10:30,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:10:30,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1211453451, now seen corresponding path program 1 times [2021-11-20 06:10:30,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:10:30,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360226654] [2021-11-20 06:10:30,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:10:30,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:10:30,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:10:30,410 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-20 06:10:30,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:10:30,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360226654] [2021-11-20 06:10:30,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360226654] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:10:30,413 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:10:30,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:10:30,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367863916] [2021-11-20 06:10:30,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:10:30,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:10:30,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:10:30,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:10:30,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:10:30,416 INFO L87 Difference]: Start difference. First operand 767 states and 1121 transitions. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:31,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:10:31,825 INFO L93 Difference]: Finished difference Result 1700 states and 2503 transitions. [2021-11-20 06:10:31,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:10:31,826 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 137 [2021-11-20 06:10:31,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:10:31,833 INFO L225 Difference]: With dead ends: 1700 [2021-11-20 06:10:31,834 INFO L226 Difference]: Without dead ends: 956 [2021-11-20 06:10:31,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:10:31,836 INFO L933 BasicCegarLoop]: 268 mSDtfsCounter, 55 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 653 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:10:31,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 653 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-20 06:10:31,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 956 states. [2021-11-20 06:10:31,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 956 to 851. [2021-11-20 06:10:31,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 851 states, 850 states have (on average 1.4917647058823529) internal successors, (1268), 850 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:31,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 1268 transitions. [2021-11-20 06:10:31,874 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 1268 transitions. Word has length 137 [2021-11-20 06:10:31,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:10:31,875 INFO L470 AbstractCegarLoop]: Abstraction has 851 states and 1268 transitions. [2021-11-20 06:10:31,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:31,876 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 1268 transitions. [2021-11-20 06:10:31,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-20 06:10:31,879 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:10:31,879 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 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] [2021-11-20 06:10:31,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-11-20 06:10:31,880 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:10:31,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:10:31,880 INFO L85 PathProgramCache]: Analyzing trace with hash -402992501, now seen corresponding path program 1 times [2021-11-20 06:10:31,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:10:31,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854723973] [2021-11-20 06:10:31,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:10:31,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:10:31,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:10:31,994 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-20 06:10:31,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:10:31,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854723973] [2021-11-20 06:10:31,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854723973] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:10:31,995 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:10:31,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:10:31,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349807869] [2021-11-20 06:10:31,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:10:31,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:10:31,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:10:31,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:10:31,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:10:31,998 INFO L87 Difference]: Start difference. First operand 851 states and 1268 transitions. Second operand has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:34,012 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:10:34,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:10:34,524 INFO L93 Difference]: Finished difference Result 1784 states and 2647 transitions. [2021-11-20 06:10:34,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:10:34,525 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-11-20 06:10:34,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:10:34,532 INFO L225 Difference]: With dead ends: 1784 [2021-11-20 06:10:34,532 INFO L226 Difference]: Without dead ends: 956 [2021-11-20 06:10:34,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:10:34,534 INFO L933 BasicCegarLoop]: 268 mSDtfsCounter, 66 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 653 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:10:34,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 653 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 215 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2021-11-20 06:10:34,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 956 states. [2021-11-20 06:10:34,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 956 to 851. [2021-11-20 06:10:34,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 851 states, 850 states have (on average 1.488235294117647) internal successors, (1265), 850 states have internal predecessors, (1265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:34,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 1265 transitions. [2021-11-20 06:10:34,573 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 1265 transitions. Word has length 150 [2021-11-20 06:10:34,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:10:34,574 INFO L470 AbstractCegarLoop]: Abstraction has 851 states and 1265 transitions. [2021-11-20 06:10:34,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:34,574 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 1265 transitions. [2021-11-20 06:10:34,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-20 06:10:34,577 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:10:34,578 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 3, 3, 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] [2021-11-20 06:10:34,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-11-20 06:10:34,579 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:10:34,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:10:34,580 INFO L85 PathProgramCache]: Analyzing trace with hash 901335317, now seen corresponding path program 1 times [2021-11-20 06:10:34,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:10:34,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990596757] [2021-11-20 06:10:34,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:10:34,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:10:34,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:10:34,683 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-20 06:10:34,683 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:10:34,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990596757] [2021-11-20 06:10:34,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990596757] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:10:34,684 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:10:34,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:10:34,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128584669] [2021-11-20 06:10:34,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:10:34,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:10:34,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:10:34,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:10:34,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:10:34,686 INFO L87 Difference]: Start difference. First operand 851 states and 1265 transitions. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:36,696 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:10:37,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:10:37,135 INFO L93 Difference]: Finished difference Result 1781 states and 2638 transitions. [2021-11-20 06:10:37,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:10:37,136 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 151 [2021-11-20 06:10:37,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:10:37,142 INFO L225 Difference]: With dead ends: 1781 [2021-11-20 06:10:37,143 INFO L226 Difference]: Without dead ends: 953 [2021-11-20 06:10:37,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:10:37,145 INFO L933 BasicCegarLoop]: 267 mSDtfsCounter, 63 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 651 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:10:37,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 651 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 212 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 06:10:37,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2021-11-20 06:10:37,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 851. [2021-11-20 06:10:37,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 851 states, 850 states have (on average 1.484705882352941) internal successors, (1262), 850 states have internal predecessors, (1262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:37,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 1262 transitions. [2021-11-20 06:10:37,185 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 1262 transitions. Word has length 151 [2021-11-20 06:10:37,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:10:37,186 INFO L470 AbstractCegarLoop]: Abstraction has 851 states and 1262 transitions. [2021-11-20 06:10:37,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:37,186 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 1262 transitions. [2021-11-20 06:10:37,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-20 06:10:37,190 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:10:37,190 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 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] [2021-11-20 06:10:37,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-11-20 06:10:37,191 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:10:37,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:10:37,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1101884971, now seen corresponding path program 1 times [2021-11-20 06:10:37,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:10:37,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666223983] [2021-11-20 06:10:37,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:10:37,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:10:37,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:10:37,291 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-20 06:10:37,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:10:37,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666223983] [2021-11-20 06:10:37,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666223983] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:10:37,292 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:10:37,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:10:37,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684785074] [2021-11-20 06:10:37,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:10:37,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:10:37,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:10:37,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:10:37,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:10:37,294 INFO L87 Difference]: Start difference. First operand 851 states and 1262 transitions. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:39,306 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:10:39,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:10:39,775 INFO L93 Difference]: Finished difference Result 1775 states and 2626 transitions. [2021-11-20 06:10:39,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:10:39,776 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 151 [2021-11-20 06:10:39,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:10:39,781 INFO L225 Difference]: With dead ends: 1775 [2021-11-20 06:10:39,782 INFO L226 Difference]: Without dead ends: 947 [2021-11-20 06:10:39,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:10:39,783 INFO L933 BasicCegarLoop]: 266 mSDtfsCounter, 63 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 649 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:10:39,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 649 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 207 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 06:10:39,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2021-11-20 06:10:39,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 851. [2021-11-20 06:10:39,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 851 states, 850 states have (on average 1.4811764705882353) internal successors, (1259), 850 states have internal predecessors, (1259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:39,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 1259 transitions. [2021-11-20 06:10:39,838 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 1259 transitions. Word has length 151 [2021-11-20 06:10:39,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:10:39,839 INFO L470 AbstractCegarLoop]: Abstraction has 851 states and 1259 transitions. [2021-11-20 06:10:39,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:39,839 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 1259 transitions. [2021-11-20 06:10:39,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-20 06:10:39,842 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:10:39,843 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 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] [2021-11-20 06:10:39,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-11-20 06:10:39,843 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:10:39,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:10:39,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1757430617, now seen corresponding path program 1 times [2021-11-20 06:10:39,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:10:39,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228310322] [2021-11-20 06:10:39,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:10:39,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:10:39,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:10:39,938 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-20 06:10:39,938 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:10:39,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228310322] [2021-11-20 06:10:39,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228310322] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:10:39,939 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:10:39,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:10:39,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034453362] [2021-11-20 06:10:39,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:10:39,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:10:39,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:10:39,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:10:39,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:10:39,941 INFO L87 Difference]: Start difference. First operand 851 states and 1259 transitions. Second operand has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:41,562 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:10:42,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:10:42,003 INFO L93 Difference]: Finished difference Result 1775 states and 2620 transitions. [2021-11-20 06:10:42,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:10:42,004 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2021-11-20 06:10:42,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:10:42,011 INFO L225 Difference]: With dead ends: 1775 [2021-11-20 06:10:42,012 INFO L226 Difference]: Without dead ends: 947 [2021-11-20 06:10:42,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:10:42,014 INFO L933 BasicCegarLoop]: 265 mSDtfsCounter, 67 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:10:42,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 647 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-20 06:10:42,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2021-11-20 06:10:42,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 851. [2021-11-20 06:10:42,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 851 states, 850 states have (on average 1.4776470588235293) internal successors, (1256), 850 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:42,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 1256 transitions. [2021-11-20 06:10:42,051 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 1256 transitions. Word has length 152 [2021-11-20 06:10:42,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:10:42,052 INFO L470 AbstractCegarLoop]: Abstraction has 851 states and 1256 transitions. [2021-11-20 06:10:42,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:42,052 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 1256 transitions. [2021-11-20 06:10:42,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-11-20 06:10:42,055 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:10:42,056 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 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] [2021-11-20 06:10:42,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-11-20 06:10:42,056 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:10:42,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:10:42,057 INFO L85 PathProgramCache]: Analyzing trace with hash 2016047793, now seen corresponding path program 1 times [2021-11-20 06:10:42,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:10:42,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126150452] [2021-11-20 06:10:42,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:10:42,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:10:42,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:10:42,164 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-20 06:10:42,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:10:42,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126150452] [2021-11-20 06:10:42,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126150452] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:10:42,165 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:10:42,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:10:42,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032359805] [2021-11-20 06:10:42,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:10:42,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:10:42,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:10:42,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:10:42,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:10:42,167 INFO L87 Difference]: Start difference. First operand 851 states and 1256 transitions. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:44,177 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:10:44,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:10:44,525 INFO L93 Difference]: Finished difference Result 1775 states and 2614 transitions. [2021-11-20 06:10:44,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:10:44,526 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 153 [2021-11-20 06:10:44,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:10:44,532 INFO L225 Difference]: With dead ends: 1775 [2021-11-20 06:10:44,533 INFO L226 Difference]: Without dead ends: 947 [2021-11-20 06:10:44,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:10:44,536 INFO L933 BasicCegarLoop]: 264 mSDtfsCounter, 65 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 645 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:10:44,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 645 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 207 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 06:10:44,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2021-11-20 06:10:44,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 851. [2021-11-20 06:10:44,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 851 states, 850 states have (on average 1.4741176470588235) internal successors, (1253), 850 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:44,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 1253 transitions. [2021-11-20 06:10:44,573 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 1253 transitions. Word has length 153 [2021-11-20 06:10:44,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:10:44,574 INFO L470 AbstractCegarLoop]: Abstraction has 851 states and 1253 transitions. [2021-11-20 06:10:44,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:44,574 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 1253 transitions. [2021-11-20 06:10:44,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-20 06:10:44,577 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:10:44,580 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 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] [2021-11-20 06:10:44,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-11-20 06:10:44,581 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:10:44,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:10:44,582 INFO L85 PathProgramCache]: Analyzing trace with hash -712267966, now seen corresponding path program 1 times [2021-11-20 06:10:44,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:10:44,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498021555] [2021-11-20 06:10:44,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:10:44,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:10:44,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:10:44,671 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 110 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-20 06:10:44,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:10:44,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498021555] [2021-11-20 06:10:44,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498021555] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:10:44,672 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:10:44,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:10:44,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503079987] [2021-11-20 06:10:44,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:10:44,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:10:44,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:10:44,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:10:44,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:10:44,675 INFO L87 Difference]: Start difference. First operand 851 states and 1253 transitions. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:45,802 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:10:46,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:10:46,190 INFO L93 Difference]: Finished difference Result 1775 states and 2608 transitions. [2021-11-20 06:10:46,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:10:46,192 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 154 [2021-11-20 06:10:46,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:10:46,196 INFO L225 Difference]: With dead ends: 1775 [2021-11-20 06:10:46,196 INFO L226 Difference]: Without dead ends: 947 [2021-11-20 06:10:46,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:10:46,198 INFO L933 BasicCegarLoop]: 263 mSDtfsCounter, 63 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 643 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:10:46,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 643 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-20 06:10:46,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2021-11-20 06:10:46,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 851. [2021-11-20 06:10:46,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 851 states, 850 states have (on average 1.4705882352941178) internal successors, (1250), 850 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:46,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 1250 transitions. [2021-11-20 06:10:46,232 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 1250 transitions. Word has length 154 [2021-11-20 06:10:46,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:10:46,233 INFO L470 AbstractCegarLoop]: Abstraction has 851 states and 1250 transitions. [2021-11-20 06:10:46,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:46,233 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 1250 transitions. [2021-11-20 06:10:46,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-11-20 06:10:46,236 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:10:46,237 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 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] [2021-11-20 06:10:46,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-11-20 06:10:46,237 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:10:46,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:10:46,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1162227244, now seen corresponding path program 1 times [2021-11-20 06:10:46,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:10:46,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858104450] [2021-11-20 06:10:46,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:10:46,239 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:10:46,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:10:46,331 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-20 06:10:46,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:10:46,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858104450] [2021-11-20 06:10:46,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858104450] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:10:46,332 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:10:46,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:10:46,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116264464] [2021-11-20 06:10:46,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:10:46,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:10:46,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:10:46,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:10:46,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:10:46,334 INFO L87 Difference]: Start difference. First operand 851 states and 1250 transitions. Second operand has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:47,598 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:10:47,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:10:47,952 INFO L93 Difference]: Finished difference Result 1745 states and 2566 transitions. [2021-11-20 06:10:47,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:10:47,953 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-11-20 06:10:47,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:10:47,960 INFO L225 Difference]: With dead ends: 1745 [2021-11-20 06:10:47,960 INFO L226 Difference]: Without dead ends: 917 [2021-11-20 06:10:47,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:10:47,962 INFO L933 BasicCegarLoop]: 256 mSDtfsCounter, 54 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:10:47,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 629 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-20 06:10:47,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 917 states. [2021-11-20 06:10:48,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 917 to 851. [2021-11-20 06:10:48,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 851 states, 850 states have (on average 1.4670588235294117) internal successors, (1247), 850 states have internal predecessors, (1247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:48,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 1247 transitions. [2021-11-20 06:10:48,018 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 1247 transitions. Word has length 155 [2021-11-20 06:10:48,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:10:48,018 INFO L470 AbstractCegarLoop]: Abstraction has 851 states and 1247 transitions. [2021-11-20 06:10:48,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:48,019 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 1247 transitions. [2021-11-20 06:10:48,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-11-20 06:10:48,021 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:10:48,021 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 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] [2021-11-20 06:10:48,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-11-20 06:10:48,022 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:10:48,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:10:48,023 INFO L85 PathProgramCache]: Analyzing trace with hash -91635470, now seen corresponding path program 1 times [2021-11-20 06:10:48,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:10:48,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088989051] [2021-11-20 06:10:48,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:10:48,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:10:48,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:10:48,123 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 156 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-20 06:10:48,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:10:48,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088989051] [2021-11-20 06:10:48,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088989051] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:10:48,124 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:10:48,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:10:48,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059352410] [2021-11-20 06:10:48,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:10:48,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:10:48,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:10:48,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:10:48,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:10:48,127 INFO L87 Difference]: Start difference. First operand 851 states and 1247 transitions. Second operand has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:49,437 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:10:49,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:10:49,780 INFO L93 Difference]: Finished difference Result 1745 states and 2560 transitions. [2021-11-20 06:10:49,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:10:49,781 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 159 [2021-11-20 06:10:49,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:10:49,787 INFO L225 Difference]: With dead ends: 1745 [2021-11-20 06:10:49,788 INFO L226 Difference]: Without dead ends: 917 [2021-11-20 06:10:49,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:10:49,790 INFO L933 BasicCegarLoop]: 255 mSDtfsCounter, 44 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 627 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:10:49,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 627 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-20 06:10:49,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 917 states. [2021-11-20 06:10:49,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 917 to 851. [2021-11-20 06:10:49,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 851 states, 850 states have (on average 1.463529411764706) internal successors, (1244), 850 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:49,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 1244 transitions. [2021-11-20 06:10:49,824 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 1244 transitions. Word has length 159 [2021-11-20 06:10:49,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:10:49,825 INFO L470 AbstractCegarLoop]: Abstraction has 851 states and 1244 transitions. [2021-11-20 06:10:49,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:49,825 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 1244 transitions. [2021-11-20 06:10:49,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-20 06:10:49,828 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:10:49,828 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 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] [2021-11-20 06:10:49,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-11-20 06:10:49,829 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:10:49,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:10:49,830 INFO L85 PathProgramCache]: Analyzing trace with hash -831879320, now seen corresponding path program 1 times [2021-11-20 06:10:49,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:10:49,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713739770] [2021-11-20 06:10:49,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:10:49,831 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:10:49,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:10:49,935 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 158 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-20 06:10:49,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:10:49,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713739770] [2021-11-20 06:10:49,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713739770] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:10:49,936 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:10:49,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:10:49,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141310046] [2021-11-20 06:10:49,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:10:49,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:10:49,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:10:49,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:10:49,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:10:49,940 INFO L87 Difference]: Start difference. First operand 851 states and 1244 transitions. Second operand has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:51,953 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:10:52,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:10:52,292 INFO L93 Difference]: Finished difference Result 1731 states and 2536 transitions. [2021-11-20 06:10:52,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:10:52,292 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-11-20 06:10:52,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:10:52,297 INFO L225 Difference]: With dead ends: 1731 [2021-11-20 06:10:52,297 INFO L226 Difference]: Without dead ends: 903 [2021-11-20 06:10:52,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:10:52,299 INFO L933 BasicCegarLoop]: 249 mSDtfsCounter, 36 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:10:52,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 615 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 189 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 06:10:52,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 903 states. [2021-11-20 06:10:52,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 903 to 851. [2021-11-20 06:10:52,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 851 states, 850 states have (on average 1.46) internal successors, (1241), 850 states have internal predecessors, (1241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:52,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 1241 transitions. [2021-11-20 06:10:52,335 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 1241 transitions. Word has length 160 [2021-11-20 06:10:52,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:10:52,336 INFO L470 AbstractCegarLoop]: Abstraction has 851 states and 1241 transitions. [2021-11-20 06:10:52,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:52,336 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 1241 transitions. [2021-11-20 06:10:52,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-11-20 06:10:52,340 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:10:52,340 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 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] [2021-11-20 06:10:52,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-11-20 06:10:52,340 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:10:52,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:10:52,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1480296344, now seen corresponding path program 1 times [2021-11-20 06:10:52,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:10:52,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243174629] [2021-11-20 06:10:52,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:10:52,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:10:52,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:10:52,439 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-20 06:10:52,439 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:10:52,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243174629] [2021-11-20 06:10:52,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243174629] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:10:52,440 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:10:52,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:10:52,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542384124] [2021-11-20 06:10:52,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:10:52,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:10:52,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:10:52,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:10:52,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:10:52,442 INFO L87 Difference]: Start difference. First operand 851 states and 1241 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:52,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:10:52,568 INFO L93 Difference]: Finished difference Result 1945 states and 2858 transitions. [2021-11-20 06:10:52,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:10:52,569 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 162 [2021-11-20 06:10:52,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:10:52,577 INFO L225 Difference]: With dead ends: 1945 [2021-11-20 06:10:52,577 INFO L226 Difference]: Without dead ends: 1117 [2021-11-20 06:10:52,579 INFO L932 BasicCegarLoop]: 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 [2021-11-20 06:10:52,579 INFO L933 BasicCegarLoop]: 395 mSDtfsCounter, 147 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 584 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:10:52,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 584 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:10:52,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1117 states. [2021-11-20 06:10:52,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1117 to 1117. [2021-11-20 06:10:52,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1117 states, 1116 states have (on average 1.4587813620071686) internal successors, (1628), 1116 states have internal predecessors, (1628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:52,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1117 states to 1117 states and 1628 transitions. [2021-11-20 06:10:52,624 INFO L78 Accepts]: Start accepts. Automaton has 1117 states and 1628 transitions. Word has length 162 [2021-11-20 06:10:52,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:10:52,625 INFO L470 AbstractCegarLoop]: Abstraction has 1117 states and 1628 transitions. [2021-11-20 06:10:52,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:52,625 INFO L276 IsEmpty]: Start isEmpty. Operand 1117 states and 1628 transitions. [2021-11-20 06:10:52,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-20 06:10:52,629 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:10:52,630 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 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] [2021-11-20 06:10:52,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-11-20 06:10:52,630 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:10:52,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:10:52,631 INFO L85 PathProgramCache]: Analyzing trace with hash -199699869, now seen corresponding path program 1 times [2021-11-20 06:10:52,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:10:52,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123734307] [2021-11-20 06:10:52,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:10:52,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:10:52,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:10:52,739 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2021-11-20 06:10:52,739 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:10:52,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123734307] [2021-11-20 06:10:52,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123734307] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:10:52,740 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:10:52,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:10:52,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45400387] [2021-11-20 06:10:52,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:10:52,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:10:52,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:10:52,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:10:52,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:10:52,742 INFO L87 Difference]: Start difference. First operand 1117 states and 1628 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:52,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:10:52,877 INFO L93 Difference]: Finished difference Result 2478 states and 3633 transitions. [2021-11-20 06:10:52,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:10:52,877 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 168 [2021-11-20 06:10:52,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:10:52,887 INFO L225 Difference]: With dead ends: 2478 [2021-11-20 06:10:52,887 INFO L226 Difference]: Without dead ends: 1384 [2021-11-20 06:10:52,889 INFO L932 BasicCegarLoop]: 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 [2021-11-20 06:10:52,890 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 162 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:10:52,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 380 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:10:52,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1384 states. [2021-11-20 06:10:52,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1384 to 1384. [2021-11-20 06:10:52,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1384 states, 1383 states have (on average 1.4620390455531453) internal successors, (2022), 1383 states have internal predecessors, (2022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:52,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1384 states to 1384 states and 2022 transitions. [2021-11-20 06:10:52,972 INFO L78 Accepts]: Start accepts. Automaton has 1384 states and 2022 transitions. Word has length 168 [2021-11-20 06:10:52,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:10:52,972 INFO L470 AbstractCegarLoop]: Abstraction has 1384 states and 2022 transitions. [2021-11-20 06:10:52,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:52,973 INFO L276 IsEmpty]: Start isEmpty. Operand 1384 states and 2022 transitions. [2021-11-20 06:10:52,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-11-20 06:10:52,977 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:10:52,978 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 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] [2021-11-20 06:10:52,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-11-20 06:10:52,978 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:10:52,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:10:52,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1531639964, now seen corresponding path program 1 times [2021-11-20 06:10:52,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:10:52,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269191658] [2021-11-20 06:10:52,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:10:52,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:10:53,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:10:53,092 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-20 06:10:53,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:10:53,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269191658] [2021-11-20 06:10:53,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269191658] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:10:53,094 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:10:53,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:10:53,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276488010] [2021-11-20 06:10:53,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:10:53,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:10:53,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:10:53,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:10:53,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:10:53,096 INFO L87 Difference]: Start difference. First operand 1384 states and 2022 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:53,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:10:53,217 INFO L93 Difference]: Finished difference Result 3012 states and 4421 transitions. [2021-11-20 06:10:53,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:10:53,219 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 200 [2021-11-20 06:10:53,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:10:53,229 INFO L225 Difference]: With dead ends: 3012 [2021-11-20 06:10:53,230 INFO L226 Difference]: Without dead ends: 1651 [2021-11-20 06:10:53,232 INFO L932 BasicCegarLoop]: 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 [2021-11-20 06:10:53,233 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 161 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:10:53,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 379 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:10:53,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1651 states. [2021-11-20 06:10:53,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1651 to 1651. [2021-11-20 06:10:53,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1651 states, 1650 states have (on average 1.4648484848484848) internal successors, (2417), 1650 states have internal predecessors, (2417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:53,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1651 states to 1651 states and 2417 transitions. [2021-11-20 06:10:53,355 INFO L78 Accepts]: Start accepts. Automaton has 1651 states and 2417 transitions. Word has length 200 [2021-11-20 06:10:53,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:10:53,355 INFO L470 AbstractCegarLoop]: Abstraction has 1651 states and 2417 transitions. [2021-11-20 06:10:53,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:53,356 INFO L276 IsEmpty]: Start isEmpty. Operand 1651 states and 2417 transitions. [2021-11-20 06:10:53,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-11-20 06:10:53,361 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:10:53,362 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 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] [2021-11-20 06:10:53,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-11-20 06:10:53,362 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:10:53,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:10:53,363 INFO L85 PathProgramCache]: Analyzing trace with hash -2033326470, now seen corresponding path program 1 times [2021-11-20 06:10:53,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:10:53,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535884333] [2021-11-20 06:10:53,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:10:53,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:10:53,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:10:53,505 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-20 06:10:53,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:10:53,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535884333] [2021-11-20 06:10:53,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535884333] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:10:53,506 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:10:53,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:10:53,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712476903] [2021-11-20 06:10:53,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:10:53,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:10:53,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:10:53,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:10:53,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:10:53,510 INFO L87 Difference]: Start difference. First operand 1651 states and 2417 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:53,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:10:53,638 INFO L93 Difference]: Finished difference Result 3546 states and 5211 transitions. [2021-11-20 06:10:53,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:10:53,639 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 202 [2021-11-20 06:10:53,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:10:53,659 INFO L225 Difference]: With dead ends: 3546 [2021-11-20 06:10:53,668 INFO L226 Difference]: Without dead ends: 1918 [2021-11-20 06:10:53,671 INFO L932 BasicCegarLoop]: 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 [2021-11-20 06:10:53,671 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 162 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:10:53,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 378 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:10:53,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1918 states. [2021-11-20 06:10:53,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1918 to 1918. [2021-11-20 06:10:53,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1918 states, 1917 states have (on average 1.467396974439228) internal successors, (2813), 1917 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:53,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1918 states to 1918 states and 2813 transitions. [2021-11-20 06:10:53,780 INFO L78 Accepts]: Start accepts. Automaton has 1918 states and 2813 transitions. Word has length 202 [2021-11-20 06:10:53,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:10:53,781 INFO L470 AbstractCegarLoop]: Abstraction has 1918 states and 2813 transitions. [2021-11-20 06:10:53,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:53,782 INFO L276 IsEmpty]: Start isEmpty. Operand 1918 states and 2813 transitions. [2021-11-20 06:10:53,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2021-11-20 06:10:53,787 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:10:53,787 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 3, 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] [2021-11-20 06:10:53,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-11-20 06:10:53,788 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:10:53,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:10:53,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1745246024, now seen corresponding path program 1 times [2021-11-20 06:10:53,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:10:53,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078840195] [2021-11-20 06:10:53,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:10:53,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:10:53,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:10:53,912 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 149 proven. 0 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-11-20 06:10:53,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:10:53,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078840195] [2021-11-20 06:10:53,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078840195] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:10:53,914 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:10:53,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:10:53,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269048560] [2021-11-20 06:10:53,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:10:53,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:10:53,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:10:53,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:10:53,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:10:53,916 INFO L87 Difference]: Start difference. First operand 1918 states and 2813 transitions. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:54,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:10:54,079 INFO L93 Difference]: Finished difference Result 4080 states and 6003 transitions. [2021-11-20 06:10:54,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:10:54,080 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 235 [2021-11-20 06:10:54,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:10:54,086 INFO L225 Difference]: With dead ends: 4080 [2021-11-20 06:10:54,087 INFO L226 Difference]: Without dead ends: 2185 [2021-11-20 06:10:54,089 INFO L932 BasicCegarLoop]: 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 [2021-11-20 06:10:54,100 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 162 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:10:54,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 377 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:10:54,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2185 states. [2021-11-20 06:10:54,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2185 to 2185. [2021-11-20 06:10:54,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2185 states, 2184 states have (on average 1.4697802197802199) internal successors, (3210), 2184 states have internal predecessors, (3210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:54,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2185 states to 2185 states and 3210 transitions. [2021-11-20 06:10:54,198 INFO L78 Accepts]: Start accepts. Automaton has 2185 states and 3210 transitions. Word has length 235 [2021-11-20 06:10:54,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:10:54,199 INFO L470 AbstractCegarLoop]: Abstraction has 2185 states and 3210 transitions. [2021-11-20 06:10:54,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:54,199 INFO L276 IsEmpty]: Start isEmpty. Operand 2185 states and 3210 transitions. [2021-11-20 06:10:54,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2021-11-20 06:10:54,205 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:10:54,205 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 5, 5, 4, 4, 4, 4, 4, 3, 3, 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] [2021-11-20 06:10:54,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-11-20 06:10:54,206 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:10:54,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:10:54,207 INFO L85 PathProgramCache]: Analyzing trace with hash 205602834, now seen corresponding path program 1 times [2021-11-20 06:10:54,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:10:54,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561369998] [2021-11-20 06:10:54,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:10:54,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:10:54,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:10:54,399 INFO L134 CoverageAnalysis]: Checked inductivity of 694 backedges. 181 proven. 0 refuted. 0 times theorem prover too weak. 513 trivial. 0 not checked. [2021-11-20 06:10:54,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:10:54,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561369998] [2021-11-20 06:10:54,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561369998] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:10:54,401 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:10:54,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:10:54,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214424642] [2021-11-20 06:10:54,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:10:54,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:10:54,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:10:54,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:10:54,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:10:54,403 INFO L87 Difference]: Start difference. First operand 2185 states and 3210 transitions. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:54,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:10:54,557 INFO L93 Difference]: Finished difference Result 4608 states and 6788 transitions. [2021-11-20 06:10:54,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:10:54,558 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 270 [2021-11-20 06:10:54,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:10:54,565 INFO L225 Difference]: With dead ends: 4608 [2021-11-20 06:10:54,566 INFO L226 Difference]: Without dead ends: 2446 [2021-11-20 06:10:54,569 INFO L932 BasicCegarLoop]: 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 [2021-11-20 06:10:54,570 INFO L933 BasicCegarLoop]: 392 mSDtfsCounter, 148 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:10:54,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 581 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:10:54,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2446 states. [2021-11-20 06:10:54,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2446 to 2446. [2021-11-20 06:10:54,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2446 states, 2445 states have (on average 1.4687116564417177) internal successors, (3591), 2445 states have internal predecessors, (3591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:54,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2446 states to 2446 states and 3591 transitions. [2021-11-20 06:10:54,664 INFO L78 Accepts]: Start accepts. Automaton has 2446 states and 3591 transitions. Word has length 270 [2021-11-20 06:10:54,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:10:54,665 INFO L470 AbstractCegarLoop]: Abstraction has 2446 states and 3591 transitions. [2021-11-20 06:10:54,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:54,665 INFO L276 IsEmpty]: Start isEmpty. Operand 2446 states and 3591 transitions. [2021-11-20 06:10:54,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2021-11-20 06:10:54,672 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:10:54,672 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 8, 8, 7, 7, 6, 6, 5, 5, 5, 5, 5, 4, 4, 3, 3, 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] [2021-11-20 06:10:54,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-11-20 06:10:54,673 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:10:54,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:10:54,673 INFO L85 PathProgramCache]: Analyzing trace with hash 111713106, now seen corresponding path program 1 times [2021-11-20 06:10:54,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:10:54,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526631808] [2021-11-20 06:10:54,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:10:54,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:10:54,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:10:54,859 INFO L134 CoverageAnalysis]: Checked inductivity of 911 backedges. 217 proven. 0 refuted. 0 times theorem prover too weak. 694 trivial. 0 not checked. [2021-11-20 06:10:54,860 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:10:54,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526631808] [2021-11-20 06:10:54,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526631808] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:10:54,860 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:10:54,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:10:54,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877744266] [2021-11-20 06:10:54,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:10:54,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:10:54,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:10:54,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:10:54,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:10:54,863 INFO L87 Difference]: Start difference. First operand 2446 states and 3591 transitions. Second operand has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:55,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:10:55,023 INFO L93 Difference]: Finished difference Result 5136 states and 7559 transitions. [2021-11-20 06:10:55,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:10:55,024 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 309 [2021-11-20 06:10:55,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:10:55,031 INFO L225 Difference]: With dead ends: 5136 [2021-11-20 06:10:55,032 INFO L226 Difference]: Without dead ends: 2713 [2021-11-20 06:10:55,035 INFO L932 BasicCegarLoop]: 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 [2021-11-20 06:10:55,036 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 160 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:10:55,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 375 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:10:55,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2713 states. [2021-11-20 06:10:55,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2713 to 2713. [2021-11-20 06:10:55,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2713 states, 2712 states have (on average 1.4712389380530972) internal successors, (3990), 2712 states have internal predecessors, (3990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:55,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2713 states to 2713 states and 3990 transitions. [2021-11-20 06:10:55,171 INFO L78 Accepts]: Start accepts. Automaton has 2713 states and 3990 transitions. Word has length 309 [2021-11-20 06:10:55,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:10:55,172 INFO L470 AbstractCegarLoop]: Abstraction has 2713 states and 3990 transitions. [2021-11-20 06:10:55,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:55,173 INFO L276 IsEmpty]: Start isEmpty. Operand 2713 states and 3990 transitions. [2021-11-20 06:10:55,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2021-11-20 06:10:55,180 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:10:55,181 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 9, 9, 8, 8, 7, 7, 6, 6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 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] [2021-11-20 06:10:55,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-11-20 06:10:55,181 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:10:55,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:10:55,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1586838023, now seen corresponding path program 1 times [2021-11-20 06:10:55,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:10:55,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310258218] [2021-11-20 06:10:55,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:10:55,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:10:55,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:10:55,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1160 backedges. 251 proven. 0 refuted. 0 times theorem prover too weak. 909 trivial. 0 not checked. [2021-11-20 06:10:55,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:10:55,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310258218] [2021-11-20 06:10:55,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310258218] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:10:55,360 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:10:55,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:10:55,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156447197] [2021-11-20 06:10:55,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:10:55,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:10:55,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:10:55,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:10:55,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:10:55,362 INFO L87 Difference]: Start difference. First operand 2713 states and 3990 transitions. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:55,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:10:55,558 INFO L93 Difference]: Finished difference Result 5670 states and 8357 transitions. [2021-11-20 06:10:55,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:10:55,558 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 350 [2021-11-20 06:10:55,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:10:55,566 INFO L225 Difference]: With dead ends: 5670 [2021-11-20 06:10:55,567 INFO L226 Difference]: Without dead ends: 2980 [2021-11-20 06:10:55,570 INFO L932 BasicCegarLoop]: 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 [2021-11-20 06:10:55,571 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 161 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:10:55,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 374 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:10:55,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2980 states. [2021-11-20 06:10:55,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2980 to 2980. [2021-11-20 06:10:55,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2980 states, 2979 states have (on average 1.4736488754615642) internal successors, (4390), 2979 states have internal predecessors, (4390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:55,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2980 states to 2980 states and 4390 transitions. [2021-11-20 06:10:55,686 INFO L78 Accepts]: Start accepts. Automaton has 2980 states and 4390 transitions. Word has length 350 [2021-11-20 06:10:55,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:10:55,687 INFO L470 AbstractCegarLoop]: Abstraction has 2980 states and 4390 transitions. [2021-11-20 06:10:55,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:55,688 INFO L276 IsEmpty]: Start isEmpty. Operand 2980 states and 4390 transitions. [2021-11-20 06:10:55,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2021-11-20 06:10:55,696 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:10:55,696 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 10, 10, 9, 9, 8, 8, 7, 7, 7, 7, 7, 6, 6, 5, 5, 4, 4, 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] [2021-11-20 06:10:55,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2021-11-20 06:10:55,697 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:10:55,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:10:55,698 INFO L85 PathProgramCache]: Analyzing trace with hash -720784750, now seen corresponding path program 1 times [2021-11-20 06:10:55,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:10:55,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438875673] [2021-11-20 06:10:55,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:10:55,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:10:55,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:10:55,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1445 backedges. 285 proven. 0 refuted. 0 times theorem prover too weak. 1160 trivial. 0 not checked. [2021-11-20 06:10:55,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:10:55,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438875673] [2021-11-20 06:10:55,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438875673] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:10:55,923 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:10:55,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:10:55,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535297949] [2021-11-20 06:10:55,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:10:55,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:10:55,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:10:55,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:10:55,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:10:55,925 INFO L87 Difference]: Start difference. First operand 2980 states and 4390 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:56,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:10:56,104 INFO L93 Difference]: Finished difference Result 6199 states and 9150 transitions. [2021-11-20 06:10:56,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:10:56,105 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 393 [2021-11-20 06:10:56,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:10:56,114 INFO L225 Difference]: With dead ends: 6199 [2021-11-20 06:10:56,114 INFO L226 Difference]: Without dead ends: 3242 [2021-11-20 06:10:56,119 INFO L932 BasicCegarLoop]: 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 [2021-11-20 06:10:56,119 INFO L933 BasicCegarLoop]: 392 mSDtfsCounter, 146 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:10:56,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 581 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:10:56,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3242 states. [2021-11-20 06:10:56,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3242 to 3242. [2021-11-20 06:10:56,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3242 states, 3241 states have (on average 1.4723850663375502) internal successors, (4772), 3241 states have internal predecessors, (4772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:56,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3242 states to 3242 states and 4772 transitions. [2021-11-20 06:10:56,304 INFO L78 Accepts]: Start accepts. Automaton has 3242 states and 4772 transitions. Word has length 393 [2021-11-20 06:10:56,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:10:56,305 INFO L470 AbstractCegarLoop]: Abstraction has 3242 states and 4772 transitions. [2021-11-20 06:10:56,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:56,306 INFO L276 IsEmpty]: Start isEmpty. Operand 3242 states and 4772 transitions. [2021-11-20 06:10:56,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2021-11-20 06:10:56,317 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:10:56,318 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 11, 11, 10, 10, 9, 9, 8, 8, 8, 8, 8, 7, 7, 6, 6, 5, 5, 3, 3, 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] [2021-11-20 06:10:56,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2021-11-20 06:10:56,319 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:10:56,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:10:56,319 INFO L85 PathProgramCache]: Analyzing trace with hash -847582380, now seen corresponding path program 1 times [2021-11-20 06:10:56,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:10:56,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665242411] [2021-11-20 06:10:56,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:10:56,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:10:56,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:10:56,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 325 proven. 0 refuted. 0 times theorem prover too weak. 1445 trivial. 0 not checked. [2021-11-20 06:10:56,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:10:56,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665242411] [2021-11-20 06:10:56,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665242411] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:10:56,536 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:10:56,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:10:56,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198281468] [2021-11-20 06:10:56,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:10:56,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:10:56,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:10:56,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:10:56,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:10:56,539 INFO L87 Difference]: Start difference. First operand 3242 states and 4772 transitions. Second operand has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:56,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:10:56,742 INFO L93 Difference]: Finished difference Result 6728 states and 9921 transitions. [2021-11-20 06:10:56,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:10:56,743 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 433 [2021-11-20 06:10:56,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:10:56,752 INFO L225 Difference]: With dead ends: 6728 [2021-11-20 06:10:56,753 INFO L226 Difference]: Without dead ends: 3509 [2021-11-20 06:10:56,757 INFO L932 BasicCegarLoop]: 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 [2021-11-20 06:10:56,758 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 160 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:10:56,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 372 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:10:56,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3509 states. [2021-11-20 06:10:56,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3509 to 3509. [2021-11-20 06:10:56,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3509 states, 3508 states have (on average 1.474914481185861) internal successors, (5174), 3508 states have internal predecessors, (5174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:56,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3509 states to 3509 states and 5174 transitions. [2021-11-20 06:10:56,872 INFO L78 Accepts]: Start accepts. Automaton has 3509 states and 5174 transitions. Word has length 433 [2021-11-20 06:10:56,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:10:56,873 INFO L470 AbstractCegarLoop]: Abstraction has 3509 states and 5174 transitions. [2021-11-20 06:10:56,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:56,874 INFO L276 IsEmpty]: Start isEmpty. Operand 3509 states and 5174 transitions. [2021-11-20 06:10:56,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2021-11-20 06:10:56,884 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:10:56,884 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 12, 12, 11, 11, 10, 10, 9, 9, 9, 9, 9, 8, 8, 7, 7, 6, 6, 3, 3, 3, 3, 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] [2021-11-20 06:10:56,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2021-11-20 06:10:56,885 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:10:56,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:10:56,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1959252838, now seen corresponding path program 1 times [2021-11-20 06:10:56,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:10:56,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989242915] [2021-11-20 06:10:56,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:10:56,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:10:56,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:10:57,151 INFO L134 CoverageAnalysis]: Checked inductivity of 2130 backedges. 358 proven. 0 refuted. 0 times theorem prover too weak. 1772 trivial. 0 not checked. [2021-11-20 06:10:57,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:10:57,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989242915] [2021-11-20 06:10:57,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989242915] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:10:57,152 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:10:57,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:10:57,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003660149] [2021-11-20 06:10:57,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:10:57,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:10:57,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:10:57,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:10:57,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:10:57,154 INFO L87 Difference]: Start difference. First operand 3509 states and 5174 transitions. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:57,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:10:57,323 INFO L93 Difference]: Finished difference Result 3778 states and 5579 transitions. [2021-11-20 06:10:57,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:10:57,324 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 475 [2021-11-20 06:10:57,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:10:57,334 INFO L225 Difference]: With dead ends: 3778 [2021-11-20 06:10:57,335 INFO L226 Difference]: Without dead ends: 3776 [2021-11-20 06:10:57,336 INFO L932 BasicCegarLoop]: 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 [2021-11-20 06:10:57,337 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 161 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:10:57,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 371 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:10:57,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3776 states. [2021-11-20 06:10:57,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3776 to 3776. [2021-11-20 06:10:57,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3776 states, 3775 states have (on average 1.4773509933774835) internal successors, (5577), 3775 states have internal predecessors, (5577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:57,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3776 states to 3776 states and 5577 transitions. [2021-11-20 06:10:57,518 INFO L78 Accepts]: Start accepts. Automaton has 3776 states and 5577 transitions. Word has length 475 [2021-11-20 06:10:57,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:10:57,519 INFO L470 AbstractCegarLoop]: Abstraction has 3776 states and 5577 transitions. [2021-11-20 06:10:57,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:57,519 INFO L276 IsEmpty]: Start isEmpty. Operand 3776 states and 5577 transitions. [2021-11-20 06:10:57,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 520 [2021-11-20 06:10:57,531 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:10:57,532 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 13, 13, 12, 12, 11, 11, 10, 10, 10, 10, 10, 9, 9, 8, 8, 7, 7, 4, 4, 3, 3, 2, 2, 2, 2, 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] [2021-11-20 06:10:57,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2021-11-20 06:10:57,533 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:10:57,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:10:57,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1317172119, now seen corresponding path program 1 times [2021-11-20 06:10:57,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:10:57,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292062693] [2021-11-20 06:10:57,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:10:57,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:10:57,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:10:57,808 INFO L134 CoverageAnalysis]: Checked inductivity of 2528 backedges. 1473 proven. 0 refuted. 0 times theorem prover too weak. 1055 trivial. 0 not checked. [2021-11-20 06:10:57,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:10:57,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292062693] [2021-11-20 06:10:57,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292062693] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:10:57,810 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:10:57,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:10:57,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212073329] [2021-11-20 06:10:57,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:10:57,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:10:57,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:10:57,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:10:57,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:10:57,817 INFO L87 Difference]: Start difference. First operand 3776 states and 5577 transitions. Second operand has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:10:59,827 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:11:00,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:11:00,537 INFO L93 Difference]: Finished difference Result 9022 states and 13389 transitions. [2021-11-20 06:11:00,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:11:00,540 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 519 [2021-11-20 06:11:00,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:11:00,557 INFO L225 Difference]: With dead ends: 9022 [2021-11-20 06:11:00,557 INFO L226 Difference]: Without dead ends: 5269 [2021-11-20 06:11:00,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:11:00,564 INFO L933 BasicCegarLoop]: 311 mSDtfsCounter, 102 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 739 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:11:00,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 739 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 282 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2021-11-20 06:11:00,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5269 states. [2021-11-20 06:11:00,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5269 to 4350. [2021-11-20 06:11:00,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4350 states, 4349 states have (on average 1.523798574384916) internal successors, (6627), 4349 states have internal predecessors, (6627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:11:00,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4350 states to 4350 states and 6627 transitions. [2021-11-20 06:11:00,782 INFO L78 Accepts]: Start accepts. Automaton has 4350 states and 6627 transitions. Word has length 519 [2021-11-20 06:11:00,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:11:00,783 INFO L470 AbstractCegarLoop]: Abstraction has 4350 states and 6627 transitions. [2021-11-20 06:11:00,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:11:00,783 INFO L276 IsEmpty]: Start isEmpty. Operand 4350 states and 6627 transitions. [2021-11-20 06:11:00,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 520 [2021-11-20 06:11:00,799 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:11:00,800 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 13, 13, 12, 12, 11, 11, 10, 10, 10, 10, 10, 9, 9, 8, 8, 7, 7, 4, 4, 3, 3, 2, 2, 2, 2, 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] [2021-11-20 06:11:00,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2021-11-20 06:11:00,801 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:11:00,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:11:00,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1566627227, now seen corresponding path program 1 times [2021-11-20 06:11:00,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:11:00,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851179696] [2021-11-20 06:11:00,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:11:00,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:11:01,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:11:01,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2528 backedges. 1409 proven. 81 refuted. 0 times theorem prover too weak. 1038 trivial. 0 not checked. [2021-11-20 06:11:01,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:11:01,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851179696] [2021-11-20 06:11:01,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851179696] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:11:01,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796247766] [2021-11-20 06:11:01,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:11:01,517 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:11:01,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf02b8d5-0555-40ab-935d-3d45ba0775b0/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:11:01,519 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf02b8d5-0555-40ab-935d-3d45ba0775b0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:11:01,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf02b8d5-0555-40ab-935d-3d45ba0775b0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 06:11:02,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:11:02,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 1740 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-20 06:11:02,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:11:02,326 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 06:11:02,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-20 06:11:02,655 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-20 06:11:02,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 10 [2021-11-20 06:11:03,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2021-11-20 06:11:03,300 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 06:11:03,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-20 06:11:03,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:11:03,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 25 [2021-11-20 06:11:03,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2021-11-20 06:11:03,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 42 [2021-11-20 06:11:03,864 INFO L354 Elim1Store]: treesize reduction 108, result has 34.9 percent of original size [2021-11-20 06:11:03,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 77 [2021-11-20 06:11:04,288 INFO L354 Elim1Store]: treesize reduction 146, result has 26.3 percent of original size [2021-11-20 06:11:04,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 71 treesize of output 94 [2021-11-20 06:11:05,229 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-20 06:11:05,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 14 [2021-11-20 06:11:05,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2528 backedges. 1460 proven. 222 refuted. 0 times theorem prover too weak. 846 trivial. 0 not checked. [2021-11-20 06:11:05,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:11:06,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 63 [2021-11-20 06:11:06,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 51 [2021-11-20 06:11:09,054 INFO L134 CoverageAnalysis]: Checked inductivity of 2528 backedges. 1264 proven. 0 refuted. 0 times theorem prover too weak. 1264 trivial. 0 not checked. [2021-11-20 06:11:09,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796247766] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 06:11:09,055 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:11:09,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9, 14] total 21 [2021-11-20 06:11:09,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240541021] [2021-11-20 06:11:09,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:11:09,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:11:09,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:11:09,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:11:09,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-11-20 06:11:09,060 INFO L87 Difference]: Start difference. First operand 4350 states and 6627 transitions. Second operand has 7 states, 7 states have (on average 30.0) internal successors, (210), 7 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:11:11,072 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:11:13,095 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:11:16,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:11:16,905 INFO L93 Difference]: Finished difference Result 14317 states and 21864 transitions. [2021-11-20 06:11:16,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:11:16,907 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 30.0) internal successors, (210), 7 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 519 [2021-11-20 06:11:16,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:11:16,935 INFO L225 Difference]: With dead ends: 14317 [2021-11-20 06:11:16,935 INFO L226 Difference]: Without dead ends: 9990 [2021-11-20 06:11:16,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1050 GetRequests, 1026 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2021-11-20 06:11:16,944 INFO L933 BasicCegarLoop]: 230 mSDtfsCounter, 618 mSDsluCounter, 592 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 123 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 618 SdHoareTripleChecker+Valid, 822 SdHoareTripleChecker+Invalid, 879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 219 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:11:16,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [618 Valid, 822 Invalid, 879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 535 Invalid, 2 Unknown, 219 Unchecked, 5.3s Time] [2021-11-20 06:11:16,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9990 states. [2021-11-20 06:11:17,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9990 to 8416. [2021-11-20 06:11:17,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8416 states, 8415 states have (on average 1.560546642899584) internal successors, (13132), 8415 states have internal predecessors, (13132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:11:17,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8416 states to 8416 states and 13132 transitions. [2021-11-20 06:11:17,315 INFO L78 Accepts]: Start accepts. Automaton has 8416 states and 13132 transitions. Word has length 519 [2021-11-20 06:11:17,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:11:17,315 INFO L470 AbstractCegarLoop]: Abstraction has 8416 states and 13132 transitions. [2021-11-20 06:11:17,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 30.0) internal successors, (210), 7 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:11:17,316 INFO L276 IsEmpty]: Start isEmpty. Operand 8416 states and 13132 transitions. [2021-11-20 06:11:17,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 520 [2021-11-20 06:11:17,332 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:11:17,332 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 13, 13, 12, 12, 11, 11, 10, 10, 10, 10, 10, 9, 9, 8, 8, 7, 7, 4, 4, 3, 3, 2, 2, 2, 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] [2021-11-20 06:11:17,369 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf02b8d5-0555-40ab-935d-3d45ba0775b0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-20 06:11:17,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf02b8d5-0555-40ab-935d-3d45ba0775b0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-11-20 06:11:17,549 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:11:17,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:11:17,550 INFO L85 PathProgramCache]: Analyzing trace with hash 158901277, now seen corresponding path program 1 times [2021-11-20 06:11:17,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:11:17,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957836585] [2021-11-20 06:11:17,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:11:17,550 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:11:17,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:11:18,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2528 backedges. 1406 proven. 81 refuted. 0 times theorem prover too weak. 1041 trivial. 0 not checked. [2021-11-20 06:11:18,022 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:11:18,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957836585] [2021-11-20 06:11:18,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957836585] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:11:18,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658006974] [2021-11-20 06:11:18,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:11:18,024 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:11:18,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf02b8d5-0555-40ab-935d-3d45ba0775b0/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:11:18,025 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf02b8d5-0555-40ab-935d-3d45ba0775b0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:11:18,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf02b8d5-0555-40ab-935d-3d45ba0775b0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 06:11:18,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:11:18,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 1741 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-20 06:11:18,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:11:18,653 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 06:11:18,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-20 06:11:18,827 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 06:11:18,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-20 06:11:19,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2021-11-20 06:11:19,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 06:11:19,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 29 [2021-11-20 06:11:19,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-11-20 06:11:19,855 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-20 06:11:19,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 32 [2021-11-20 06:11:20,018 INFO L354 Elim1Store]: treesize reduction 66, result has 30.5 percent of original size [2021-11-20 06:11:20,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 54 [2021-11-20 06:11:22,920 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-11-20 06:11:22,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 61 [2021-11-20 06:11:23,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2528 backedges. 1259 proven. 194 refuted. 0 times theorem prover too weak. 1075 trivial. 0 not checked. [2021-11-20 06:11:23,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:11:23,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-11-20 06:11:23,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-11-20 06:11:25,978 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_arrayElimCell_32 Int) (v_arrayElimCell_33 Int)) (not (= (select (store (select (store |c_#memory_int| v_arrayElimCell_32 (store (select |c_#memory_int| v_arrayElimCell_32) (+ 844 v_arrayElimCell_33) 3)) |c_ULTIMATE.start_ssl3_accept_~s#1.base|) (+ 64 |c_ULTIMATE.start_ssl3_accept_~s#1.offset|) 0) (+ 52 |c_ULTIMATE.start_ssl3_accept_~s#1.offset|)) 8640))) is different from false [2021-11-20 06:11:25,991 INFO L354 Elim1Store]: treesize reduction 55, result has 1.8 percent of original size [2021-11-20 06:11:25,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 1 [2021-11-20 06:11:26,578 INFO L134 CoverageAnalysis]: Checked inductivity of 2528 backedges. 1261 proven. 0 refuted. 0 times theorem prover too weak. 1267 trivial. 0 not checked. [2021-11-20 06:11:26,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658006974] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 06:11:26,578 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:11:26,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 11] total 17 [2021-11-20 06:11:26,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040809506] [2021-11-20 06:11:26,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:11:26,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:11:26,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:11:26,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:11:26,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=200, Unknown=1, NotChecked=28, Total=272 [2021-11-20 06:11:26,581 INFO L87 Difference]: Start difference. First operand 8416 states and 13132 transitions. Second operand has 5 states, 5 states have (on average 41.6) internal successors, (208), 5 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:11:28,591 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:11:30,673 WARN L838 $PredicateComparison]: unable to prove that (and (not (= 8640 (select (store (select |c_#memory_int| |c_ULTIMATE.start_ssl3_accept_~s#1.base|) (+ 64 |c_ULTIMATE.start_ssl3_accept_~s#1.offset|) 0) (+ 52 |c_ULTIMATE.start_ssl3_accept_~s#1.offset|)))) (forall ((v_arrayElimCell_32 Int) (v_arrayElimCell_33 Int)) (not (= (select (store (select (store |c_#memory_int| v_arrayElimCell_32 (store (select |c_#memory_int| v_arrayElimCell_32) (+ 844 v_arrayElimCell_33) 3)) |c_ULTIMATE.start_ssl3_accept_~s#1.base|) (+ 64 |c_ULTIMATE.start_ssl3_accept_~s#1.offset|) 0) (+ 52 |c_ULTIMATE.start_ssl3_accept_~s#1.offset|)) 8640)))) is different from false [2021-11-20 06:11:31,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:11:31,174 INFO L93 Difference]: Finished difference Result 20362 states and 31884 transitions. [2021-11-20 06:11:31,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:11:31,175 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 41.6) internal successors, (208), 5 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 519 [2021-11-20 06:11:31,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:11:31,209 INFO L225 Difference]: With dead ends: 20362 [2021-11-20 06:11:31,209 INFO L226 Difference]: Without dead ends: 11969 [2021-11-20 06:11:31,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1047 GetRequests, 1028 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=50, Invalid=228, Unknown=2, NotChecked=62, Total=342 [2021-11-20 06:11:31,223 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 134 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 57 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 297 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:11:31,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 494 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 255 Invalid, 1 Unknown, 297 Unchecked, 2.5s Time] [2021-11-20 06:11:31,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11969 states. [2021-11-20 06:11:31,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11969 to 9469. [2021-11-20 06:11:31,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9469 states, 9468 states have (on average 1.5866075200675962) internal successors, (15022), 9468 states have internal predecessors, (15022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:11:31,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9469 states to 9469 states and 15022 transitions. [2021-11-20 06:11:31,654 INFO L78 Accepts]: Start accepts. Automaton has 9469 states and 15022 transitions. Word has length 519 [2021-11-20 06:11:31,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:11:31,655 INFO L470 AbstractCegarLoop]: Abstraction has 9469 states and 15022 transitions. [2021-11-20 06:11:31,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 41.6) internal successors, (208), 5 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:11:31,655 INFO L276 IsEmpty]: Start isEmpty. Operand 9469 states and 15022 transitions. [2021-11-20 06:11:31,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 521 [2021-11-20 06:11:31,670 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:11:31,671 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 13, 13, 12, 12, 11, 11, 10, 10, 10, 10, 10, 9, 9, 8, 8, 7, 7, 4, 4, 3, 3, 3, 2, 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] [2021-11-20 06:11:31,700 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf02b8d5-0555-40ab-935d-3d45ba0775b0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-20 06:11:31,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf02b8d5-0555-40ab-935d-3d45ba0775b0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:11:31,872 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:11:31,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:11:31,873 INFO L85 PathProgramCache]: Analyzing trace with hash 733561204, now seen corresponding path program 1 times [2021-11-20 06:11:31,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:11:31,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600153952] [2021-11-20 06:11:31,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:11:31,873 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:11:31,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:11:32,160 INFO L134 CoverageAnalysis]: Checked inductivity of 2530 backedges. 1049 proven. 0 refuted. 0 times theorem prover too weak. 1481 trivial. 0 not checked. [2021-11-20 06:11:32,160 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:11:32,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600153952] [2021-11-20 06:11:32,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600153952] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:11:32,161 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:11:32,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:11:32,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001479841] [2021-11-20 06:11:32,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:11:32,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:11:32,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:11:32,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:11:32,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:11:32,165 INFO L87 Difference]: Start difference. First operand 9469 states and 15022 transitions. Second operand has 4 states, 4 states have (on average 52.5) internal successors, (210), 4 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:11:34,176 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:11:35,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:11:35,159 INFO L93 Difference]: Finished difference Result 20440 states and 32017 transitions. [2021-11-20 06:11:35,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:11:35,160 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 52.5) internal successors, (210), 4 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 520 [2021-11-20 06:11:35,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:11:35,188 INFO L225 Difference]: With dead ends: 20440 [2021-11-20 06:11:35,188 INFO L226 Difference]: Without dead ends: 10994 [2021-11-20 06:11:35,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:11:35,206 INFO L933 BasicCegarLoop]: 309 mSDtfsCounter, 99 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 735 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:11:35,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 735 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 279 Invalid, 1 Unknown, 0 Unchecked, 2.7s Time] [2021-11-20 06:11:35,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10994 states. [2021-11-20 06:11:35,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10994 to 9483. [2021-11-20 06:11:35,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9483 states, 9482 states have (on average 1.5857414047669267) internal successors, (15036), 9482 states have internal predecessors, (15036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:11:35,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9483 states to 9483 states and 15036 transitions. [2021-11-20 06:11:35,691 INFO L78 Accepts]: Start accepts. Automaton has 9483 states and 15036 transitions. Word has length 520 [2021-11-20 06:11:35,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:11:35,692 INFO L470 AbstractCegarLoop]: Abstraction has 9483 states and 15036 transitions. [2021-11-20 06:11:35,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.5) internal successors, (210), 4 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:11:35,693 INFO L276 IsEmpty]: Start isEmpty. Operand 9483 states and 15036 transitions. [2021-11-20 06:11:35,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 521 [2021-11-20 06:11:35,708 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:11:35,709 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 13, 13, 12, 12, 11, 11, 10, 10, 10, 10, 10, 9, 9, 8, 8, 7, 7, 5, 4, 3, 2, 2, 2, 2, 2, 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] [2021-11-20 06:11:35,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2021-11-20 06:11:35,710 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:11:35,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:11:35,710 INFO L85 PathProgramCache]: Analyzing trace with hash 429651418, now seen corresponding path program 1 times [2021-11-20 06:11:35,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:11:35,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790796337] [2021-11-20 06:11:35,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:11:35,711 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:11:35,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:11:36,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2532 backedges. 1268 proven. 0 refuted. 0 times theorem prover too weak. 1264 trivial. 0 not checked. [2021-11-20 06:11:36,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:11:36,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790796337] [2021-11-20 06:11:36,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790796337] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:11:36,176 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:11:36,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 06:11:36,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784568423] [2021-11-20 06:11:36,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:11:36,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:11:36,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:11:36,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:11:36,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:11:36,178 INFO L87 Difference]: Start difference. First operand 9483 states and 15036 transitions. Second operand has 7 states, 7 states have (on average 30.142857142857142) internal successors, (211), 7 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:11:38,193 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:11:40,216 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:11:42,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:11:42,562 INFO L93 Difference]: Finished difference Result 25218 states and 39928 transitions. [2021-11-20 06:11:42,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 06:11:42,563 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 30.142857142857142) internal successors, (211), 7 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 520 [2021-11-20 06:11:42,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:11:42,594 INFO L225 Difference]: With dead ends: 25218 [2021-11-20 06:11:42,595 INFO L226 Difference]: Without dead ends: 15758 [2021-11-20 06:11:42,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:11:42,606 INFO L933 BasicCegarLoop]: 377 mSDtfsCounter, 231 mSDsluCounter, 1118 mSDsCounter, 0 mSdLazyCounter, 1008 mSolverCounterSat, 48 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 1495 SdHoareTripleChecker+Invalid, 1058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1008 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2021-11-20 06:11:42,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 1495 Invalid, 1058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1008 Invalid, 2 Unknown, 0 Unchecked, 5.8s Time] [2021-11-20 06:11:42,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15758 states. [2021-11-20 06:11:43,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15758 to 10343. [2021-11-20 06:11:43,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10343 states, 10342 states have (on average 1.5857667762521757) internal successors, (16400), 10342 states have internal predecessors, (16400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:11:43,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10343 states to 10343 states and 16400 transitions. [2021-11-20 06:11:43,076 INFO L78 Accepts]: Start accepts. Automaton has 10343 states and 16400 transitions. Word has length 520 [2021-11-20 06:11:43,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:11:43,077 INFO L470 AbstractCegarLoop]: Abstraction has 10343 states and 16400 transitions. [2021-11-20 06:11:43,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 30.142857142857142) internal successors, (211), 7 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:11:43,077 INFO L276 IsEmpty]: Start isEmpty. Operand 10343 states and 16400 transitions. [2021-11-20 06:11:43,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 521 [2021-11-20 06:11:43,095 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:11:43,095 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 13, 13, 12, 12, 11, 11, 10, 10, 10, 10, 10, 9, 9, 8, 8, 7, 7, 5, 4, 3, 2, 2, 2, 2, 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] [2021-11-20 06:11:43,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2021-11-20 06:11:43,096 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:11:43,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:11:43,097 INFO L85 PathProgramCache]: Analyzing trace with hash -260180072, now seen corresponding path program 1 times [2021-11-20 06:11:43,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:11:43,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335447190] [2021-11-20 06:11:43,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:11:43,098 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:11:43,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:11:43,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2532 backedges. 1265 proven. 0 refuted. 0 times theorem prover too weak. 1267 trivial. 0 not checked. [2021-11-20 06:11:43,574 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:11:43,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335447190] [2021-11-20 06:11:43,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335447190] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:11:43,575 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:11:43,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 06:11:43,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310660381] [2021-11-20 06:11:43,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:11:43,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:11:43,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:11:43,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:11:43,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:11:43,577 INFO L87 Difference]: Start difference. First operand 10343 states and 16400 transitions. Second operand has 7 states, 7 states have (on average 29.857142857142858) internal successors, (209), 7 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:11:45,591 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:11:47,612 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:11:49,639 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:11:52,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:11:52,390 INFO L93 Difference]: Finished difference Result 28743 states and 45152 transitions. [2021-11-20 06:11:52,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 06:11:52,391 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 29.857142857142858) internal successors, (209), 7 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 520 [2021-11-20 06:11:52,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:11:52,413 INFO L225 Difference]: With dead ends: 28743 [2021-11-20 06:11:52,413 INFO L226 Difference]: Without dead ends: 18423 [2021-11-20 06:11:52,422 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-11-20 06:11:52,422 INFO L933 BasicCegarLoop]: 362 mSDtfsCounter, 616 mSDsluCounter, 1021 mSDsCounter, 0 mSdLazyCounter, 904 mSolverCounterSat, 74 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 616 SdHoareTripleChecker+Valid, 1383 SdHoareTripleChecker+Invalid, 981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 904 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:11:52,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [616 Valid, 1383 Invalid, 981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 904 Invalid, 3 Unknown, 0 Unchecked, 8.0s Time] [2021-11-20 06:11:52,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18423 states. [2021-11-20 06:11:53,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18423 to 11015. [2021-11-20 06:11:53,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11015 states, 11014 states have (on average 1.5932449609587798) internal successors, (17548), 11014 states have internal predecessors, (17548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:11:53,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11015 states to 11015 states and 17548 transitions. [2021-11-20 06:11:53,053 INFO L78 Accepts]: Start accepts. Automaton has 11015 states and 17548 transitions. Word has length 520 [2021-11-20 06:11:53,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:11:53,054 INFO L470 AbstractCegarLoop]: Abstraction has 11015 states and 17548 transitions. [2021-11-20 06:11:53,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 29.857142857142858) internal successors, (209), 7 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:11:53,054 INFO L276 IsEmpty]: Start isEmpty. Operand 11015 states and 17548 transitions. [2021-11-20 06:11:53,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 533 [2021-11-20 06:11:53,069 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:11:53,070 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 14, 14, 14, 13, 13, 12, 12, 11, 11, 10, 10, 10, 10, 10, 9, 9, 8, 8, 7, 7, 4, 4, 3, 3, 2, 2, 2, 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] [2021-11-20 06:11:53,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2021-11-20 06:11:53,070 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:11:53,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:11:53,070 INFO L85 PathProgramCache]: Analyzing trace with hash 77449571, now seen corresponding path program 1 times [2021-11-20 06:11:53,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:11:53,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429812939] [2021-11-20 06:11:53,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:11:53,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:11:53,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:11:53,375 INFO L134 CoverageAnalysis]: Checked inductivity of 2690 backedges. 1089 proven. 28 refuted. 0 times theorem prover too weak. 1573 trivial. 0 not checked. [2021-11-20 06:11:53,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:11:53,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429812939] [2021-11-20 06:11:53,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429812939] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:11:53,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377239429] [2021-11-20 06:11:53,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:11:53,377 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:11:53,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf02b8d5-0555-40ab-935d-3d45ba0775b0/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:11:53,385 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf02b8d5-0555-40ab-935d-3d45ba0775b0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:11:53,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf02b8d5-0555-40ab-935d-3d45ba0775b0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 06:11:53,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:11:53,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 1785 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-20 06:11:53,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:11:53,924 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 06:11:53,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-20 06:11:54,048 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 06:11:54,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-20 06:11:54,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2021-11-20 06:11:54,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 50 [2021-11-20 06:11:54,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 38 [2021-11-20 06:11:54,870 INFO L354 Elim1Store]: treesize reduction 85, result has 30.9 percent of original size [2021-11-20 06:11:54,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 47 [2021-11-20 06:11:55,189 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 06:11:55,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-20 06:11:55,387 INFO L134 CoverageAnalysis]: Checked inductivity of 2690 backedges. 1083 proven. 226 refuted. 0 times theorem prover too weak. 1381 trivial. 0 not checked. [2021-11-20 06:11:55,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:11:55,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 36 [2021-11-20 06:11:55,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 30 [2021-11-20 06:11:55,789 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-20 06:11:55,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 1 [2021-11-20 06:11:56,432 INFO L134 CoverageAnalysis]: Checked inductivity of 2690 backedges. 1079 proven. 0 refuted. 0 times theorem prover too weak. 1611 trivial. 0 not checked. [2021-11-20 06:11:56,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377239429] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 06:11:56,433 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:11:56,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 9] total 11 [2021-11-20 06:11:56,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298559687] [2021-11-20 06:11:56,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:11:56,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:11:56,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:11:56,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:11:56,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:11:56,436 INFO L87 Difference]: Start difference. First operand 11015 states and 17548 transitions. Second operand has 4 states, 4 states have (on average 52.75) internal successors, (211), 4 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:11:58,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:11:58,034 INFO L93 Difference]: Finished difference Result 25365 states and 40410 transitions. [2021-11-20 06:11:58,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:11:58,035 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 52.75) internal successors, (211), 4 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 532 [2021-11-20 06:11:58,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:11:58,052 INFO L225 Difference]: With dead ends: 25365 [2021-11-20 06:11:58,052 INFO L226 Difference]: Without dead ends: 14373 [2021-11-20 06:11:58,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1071 GetRequests, 1061 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-20 06:11:58,060 INFO L933 BasicCegarLoop]: 233 mSDtfsCounter, 132 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:11:58,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 576 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-20 06:11:58,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14373 states. [2021-11-20 06:11:58,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14373 to 12303. [2021-11-20 06:11:58,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12303 states, 12302 states have (on average 1.6290034140790115) internal successors, (20040), 12302 states have internal predecessors, (20040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:11:58,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12303 states to 12303 states and 20040 transitions. [2021-11-20 06:11:58,668 INFO L78 Accepts]: Start accepts. Automaton has 12303 states and 20040 transitions. Word has length 532 [2021-11-20 06:11:58,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:11:58,668 INFO L470 AbstractCegarLoop]: Abstraction has 12303 states and 20040 transitions. [2021-11-20 06:11:58,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.75) internal successors, (211), 4 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:11:58,669 INFO L276 IsEmpty]: Start isEmpty. Operand 12303 states and 20040 transitions. [2021-11-20 06:11:58,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 534 [2021-11-20 06:11:58,692 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:11:58,693 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 14, 14, 14, 13, 13, 12, 12, 11, 11, 10, 10, 10, 10, 10, 9, 9, 8, 8, 7, 7, 4, 4, 3, 3, 3, 2, 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] [2021-11-20 06:11:58,730 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf02b8d5-0555-40ab-935d-3d45ba0775b0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 06:11:58,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf02b8d5-0555-40ab-935d-3d45ba0775b0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:11:58,908 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:11:58,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:11:58,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1228922474, now seen corresponding path program 1 times [2021-11-20 06:11:58,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:11:58,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164798365] [2021-11-20 06:11:58,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:11:58,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:11:59,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:11:59,207 INFO L134 CoverageAnalysis]: Checked inductivity of 2692 backedges. 1064 proven. 0 refuted. 0 times theorem prover too weak. 1628 trivial. 0 not checked. [2021-11-20 06:11:59,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:11:59,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164798365] [2021-11-20 06:11:59,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164798365] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:11:59,208 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:11:59,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:11:59,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985216250] [2021-11-20 06:11:59,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:11:59,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:11:59,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:11:59,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:11:59,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:11:59,211 INFO L87 Difference]: Start difference. First operand 12303 states and 20040 transitions. Second operand has 4 states, 4 states have (on average 50.75) internal successors, (203), 4 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:01,221 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:12:02,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:12:02,014 INFO L93 Difference]: Finished difference Result 26011 states and 42179 transitions. [2021-11-20 06:12:02,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:12:02,015 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 50.75) internal successors, (203), 4 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 533 [2021-11-20 06:12:02,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:12:02,030 INFO L225 Difference]: With dead ends: 26011 [2021-11-20 06:12:02,030 INFO L226 Difference]: Without dead ends: 13731 [2021-11-20 06:12:02,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:12:02,042 INFO L933 BasicCegarLoop]: 272 mSDtfsCounter, 61 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 661 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:12:02,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 661 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 235 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 06:12:02,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13731 states. [2021-11-20 06:12:02,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13731 to 12751. [2021-11-20 06:12:02,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12751 states, 12750 states have (on average 1.6332549019607843) internal successors, (20824), 12750 states have internal predecessors, (20824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:02,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12751 states to 12751 states and 20824 transitions. [2021-11-20 06:12:02,502 INFO L78 Accepts]: Start accepts. Automaton has 12751 states and 20824 transitions. Word has length 533 [2021-11-20 06:12:02,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:12:02,503 INFO L470 AbstractCegarLoop]: Abstraction has 12751 states and 20824 transitions. [2021-11-20 06:12:02,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 50.75) internal successors, (203), 4 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:02,503 INFO L276 IsEmpty]: Start isEmpty. Operand 12751 states and 20824 transitions. [2021-11-20 06:12:02,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 536 [2021-11-20 06:12:02,521 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:12:02,521 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 13, 13, 12, 12, 11, 11, 10, 10, 10, 10, 10, 9, 9, 8, 8, 7, 7, 5, 4, 3, 2, 2, 2, 2, 2, 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] [2021-11-20 06:12:02,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2021-11-20 06:12:02,522 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:12:02,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:12:02,523 INFO L85 PathProgramCache]: Analyzing trace with hash 66649648, now seen corresponding path program 1 times [2021-11-20 06:12:02,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:12:02,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788257020] [2021-11-20 06:12:02,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:12:02,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:12:02,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:12:02,939 INFO L134 CoverageAnalysis]: Checked inductivity of 2634 backedges. 1309 proven. 21 refuted. 0 times theorem prover too weak. 1304 trivial. 0 not checked. [2021-11-20 06:12:02,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:12:02,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788257020] [2021-11-20 06:12:02,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788257020] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:12:02,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450265860] [2021-11-20 06:12:02,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:12:02,940 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:12:02,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf02b8d5-0555-40ab-935d-3d45ba0775b0/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:12:02,941 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf02b8d5-0555-40ab-935d-3d45ba0775b0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:12:02,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf02b8d5-0555-40ab-935d-3d45ba0775b0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 06:12:03,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:12:03,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 1791 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 06:12:03,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:12:04,183 INFO L354 Elim1Store]: treesize reduction 74, result has 46.0 percent of original size [2021-11-20 06:12:04,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 172 treesize of output 163 [2021-11-20 06:12:04,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 140 treesize of output 110 [2021-11-20 06:12:04,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 80 [2021-11-20 06:12:04,236 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 06:12:04,268 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-11-20 06:12:04,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 7 [2021-11-20 06:12:04,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-20 06:12:04,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2634 backedges. 1293 proven. 0 refuted. 0 times theorem prover too weak. 1341 trivial. 0 not checked. [2021-11-20 06:12:04,774 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:12:04,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450265860] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:12:04,775 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:12:04,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2021-11-20 06:12:04,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817961661] [2021-11-20 06:12:04,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:12:04,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:12:04,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:12:04,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:12:04,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:12:04,779 INFO L87 Difference]: Start difference. First operand 12751 states and 20824 transitions. Second operand has 6 states, 6 states have (on average 36.333333333333336) internal successors, (218), 6 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:06,789 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:12:07,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:12:07,752 INFO L93 Difference]: Finished difference Result 26936 states and 43808 transitions. [2021-11-20 06:12:07,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:12:07,753 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 36.333333333333336) internal successors, (218), 6 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 535 [2021-11-20 06:12:07,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:12:07,768 INFO L225 Difference]: With dead ends: 26936 [2021-11-20 06:12:07,769 INFO L226 Difference]: Without dead ends: 14208 [2021-11-20 06:12:07,778 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 544 GetRequests, 533 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-20 06:12:07,779 INFO L933 BasicCegarLoop]: 286 mSDtfsCounter, 187 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 18 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 801 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:12:07,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 801 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 371 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2021-11-20 06:12:07,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14208 states. [2021-11-20 06:12:08,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14208 to 12751. [2021-11-20 06:12:08,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12751 states, 12750 states have (on average 1.6332549019607843) internal successors, (20824), 12750 states have internal predecessors, (20824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:08,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12751 states to 12751 states and 20824 transitions. [2021-11-20 06:12:08,156 INFO L78 Accepts]: Start accepts. Automaton has 12751 states and 20824 transitions. Word has length 535 [2021-11-20 06:12:08,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:12:08,157 INFO L470 AbstractCegarLoop]: Abstraction has 12751 states and 20824 transitions. [2021-11-20 06:12:08,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 36.333333333333336) internal successors, (218), 6 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:08,157 INFO L276 IsEmpty]: Start isEmpty. Operand 12751 states and 20824 transitions. [2021-11-20 06:12:08,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 536 [2021-11-20 06:12:08,169 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:12:08,170 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 13, 13, 12, 12, 11, 11, 10, 10, 10, 10, 10, 9, 9, 8, 8, 7, 7, 4, 4, 3, 3, 3, 2, 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] [2021-11-20 06:12:08,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf02b8d5-0555-40ab-935d-3d45ba0775b0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 06:12:08,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf02b8d5-0555-40ab-935d-3d45ba0775b0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-11-20 06:12:08,381 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:12:08,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:12:08,382 INFO L85 PathProgramCache]: Analyzing trace with hash -653447666, now seen corresponding path program 1 times [2021-11-20 06:12:08,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:12:08,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688476645] [2021-11-20 06:12:08,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:12:08,382 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:12:08,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:12:08,635 INFO L134 CoverageAnalysis]: Checked inductivity of 2632 backedges. 1080 proven. 0 refuted. 0 times theorem prover too weak. 1552 trivial. 0 not checked. [2021-11-20 06:12:08,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:12:08,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688476645] [2021-11-20 06:12:08,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688476645] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:12:08,636 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:12:08,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:12:08,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807906830] [2021-11-20 06:12:08,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:12:08,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:12:08,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:12:08,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:12:08,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:12:08,639 INFO L87 Difference]: Start difference. First operand 12751 states and 20824 transitions. Second operand has 4 states, 4 states have (on average 47.25) internal successors, (189), 4 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:10,648 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:12:11,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:12:11,612 INFO L93 Difference]: Finished difference Result 26963 states and 43567 transitions. [2021-11-20 06:12:11,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:12:11,612 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 47.25) internal successors, (189), 4 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 535 [2021-11-20 06:12:11,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:12:11,629 INFO L225 Difference]: With dead ends: 26963 [2021-11-20 06:12:11,629 INFO L226 Difference]: Without dead ends: 14235 [2021-11-20 06:12:11,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:12:11,638 INFO L933 BasicCegarLoop]: 299 mSDtfsCounter, 118 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 715 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:12:11,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 715 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 272 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2021-11-20 06:12:11,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14235 states. [2021-11-20 06:12:12,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14235 to 12751. [2021-11-20 06:12:12,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12751 states, 12750 states have (on average 1.6310588235294117) internal successors, (20796), 12750 states have internal predecessors, (20796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:12,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12751 states to 12751 states and 20796 transitions. [2021-11-20 06:12:12,043 INFO L78 Accepts]: Start accepts. Automaton has 12751 states and 20796 transitions. Word has length 535 [2021-11-20 06:12:12,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:12:12,044 INFO L470 AbstractCegarLoop]: Abstraction has 12751 states and 20796 transitions. [2021-11-20 06:12:12,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.25) internal successors, (189), 4 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:12,044 INFO L276 IsEmpty]: Start isEmpty. Operand 12751 states and 20796 transitions. [2021-11-20 06:12:12,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 537 [2021-11-20 06:12:12,057 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:12:12,057 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 13, 13, 12, 12, 11, 11, 10, 10, 10, 10, 10, 9, 9, 8, 8, 7, 7, 4, 4, 3, 3, 3, 2, 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] [2021-11-20 06:12:12,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2021-11-20 06:12:12,057 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:12:12,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:12:12,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1004759566, now seen corresponding path program 1 times [2021-11-20 06:12:12,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:12:12,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843133186] [2021-11-20 06:12:12,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:12:12,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:12:12,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:12:12,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2647 backedges. 1095 proven. 0 refuted. 0 times theorem prover too weak. 1552 trivial. 0 not checked. [2021-11-20 06:12:12,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:12:12,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843133186] [2021-11-20 06:12:12,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843133186] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:12:12,400 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:12:12,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:12:12,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166132842] [2021-11-20 06:12:12,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:12:12,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:12:12,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:12:12,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:12:12,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:12:12,403 INFO L87 Difference]: Start difference. First operand 12751 states and 20796 transitions. Second operand has 4 states, 4 states have (on average 47.5) internal successors, (190), 4 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:13,771 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:12:14,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:12:14,704 INFO L93 Difference]: Finished difference Result 26963 states and 43511 transitions. [2021-11-20 06:12:14,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:12:14,705 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 47.5) internal successors, (190), 4 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 536 [2021-11-20 06:12:14,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:12:14,721 INFO L225 Difference]: With dead ends: 26963 [2021-11-20 06:12:14,721 INFO L226 Difference]: Without dead ends: 14235 [2021-11-20 06:12:14,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:12:14,731 INFO L933 BasicCegarLoop]: 298 mSDtfsCounter, 116 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 713 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-20 06:12:14,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 713 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-20 06:12:14,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14235 states. [2021-11-20 06:12:15,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14235 to 12751. [2021-11-20 06:12:15,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12751 states, 12750 states have (on average 1.6288627450980393) internal successors, (20768), 12750 states have internal predecessors, (20768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:15,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12751 states to 12751 states and 20768 transitions. [2021-11-20 06:12:15,225 INFO L78 Accepts]: Start accepts. Automaton has 12751 states and 20768 transitions. Word has length 536 [2021-11-20 06:12:15,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:12:15,225 INFO L470 AbstractCegarLoop]: Abstraction has 12751 states and 20768 transitions. [2021-11-20 06:12:15,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.5) internal successors, (190), 4 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:15,226 INFO L276 IsEmpty]: Start isEmpty. Operand 12751 states and 20768 transitions. [2021-11-20 06:12:15,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 538 [2021-11-20 06:12:15,242 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:12:15,243 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 13, 13, 12, 12, 11, 11, 10, 10, 10, 10, 10, 9, 9, 8, 8, 7, 7, 4, 4, 3, 3, 3, 2, 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] [2021-11-20 06:12:15,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2021-11-20 06:12:15,243 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:12:15,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:12:15,243 INFO L85 PathProgramCache]: Analyzing trace with hash -2075490733, now seen corresponding path program 1 times [2021-11-20 06:12:15,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:12:15,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600788508] [2021-11-20 06:12:15,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:12:15,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:12:15,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:12:15,543 INFO L134 CoverageAnalysis]: Checked inductivity of 2662 backedges. 1110 proven. 0 refuted. 0 times theorem prover too weak. 1552 trivial. 0 not checked. [2021-11-20 06:12:15,544 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:12:15,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600788508] [2021-11-20 06:12:15,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600788508] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:12:15,544 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:12:15,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:12:15,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77120780] [2021-11-20 06:12:15,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:12:15,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:12:15,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:12:15,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:12:15,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:12:15,547 INFO L87 Difference]: Start difference. First operand 12751 states and 20768 transitions. Second operand has 4 states, 4 states have (on average 47.75) internal successors, (191), 4 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:17,539 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:12:18,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:12:18,492 INFO L93 Difference]: Finished difference Result 26963 states and 43455 transitions. [2021-11-20 06:12:18,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:12:18,492 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 47.75) internal successors, (191), 4 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 537 [2021-11-20 06:12:18,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:12:18,508 INFO L225 Difference]: With dead ends: 26963 [2021-11-20 06:12:18,508 INFO L226 Difference]: Without dead ends: 14235 [2021-11-20 06:12:18,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:12:18,519 INFO L933 BasicCegarLoop]: 297 mSDtfsCounter, 114 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 711 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:12:18,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 711 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 06:12:18,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14235 states. [2021-11-20 06:12:18,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14235 to 12751. [2021-11-20 06:12:18,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12751 states, 12750 states have (on average 1.6266666666666667) internal successors, (20740), 12750 states have internal predecessors, (20740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:19,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12751 states to 12751 states and 20740 transitions. [2021-11-20 06:12:19,019 INFO L78 Accepts]: Start accepts. Automaton has 12751 states and 20740 transitions. Word has length 537 [2021-11-20 06:12:19,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:12:19,019 INFO L470 AbstractCegarLoop]: Abstraction has 12751 states and 20740 transitions. [2021-11-20 06:12:19,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.75) internal successors, (191), 4 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:19,019 INFO L276 IsEmpty]: Start isEmpty. Operand 12751 states and 20740 transitions. [2021-11-20 06:12:19,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 539 [2021-11-20 06:12:19,030 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:12:19,030 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 13, 13, 12, 12, 11, 11, 10, 10, 10, 10, 10, 9, 9, 8, 8, 7, 7, 4, 4, 3, 3, 3, 2, 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] [2021-11-20 06:12:19,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2021-11-20 06:12:19,030 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:12:19,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:12:19,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1724069133, now seen corresponding path program 1 times [2021-11-20 06:12:19,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:12:19,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394682673] [2021-11-20 06:12:19,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:12:19,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:12:19,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:12:19,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2677 backedges. 1125 proven. 0 refuted. 0 times theorem prover too weak. 1552 trivial. 0 not checked. [2021-11-20 06:12:19,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:12:19,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394682673] [2021-11-20 06:12:19,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394682673] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:12:19,270 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:12:19,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:12:19,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504857219] [2021-11-20 06:12:19,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:12:19,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:12:19,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:12:19,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:12:19,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:12:19,272 INFO L87 Difference]: Start difference. First operand 12751 states and 20740 transitions. Second operand has 4 states, 4 states have (on average 48.0) internal successors, (192), 4 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:21,282 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:12:22,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:12:22,112 INFO L93 Difference]: Finished difference Result 26823 states and 43231 transitions. [2021-11-20 06:12:22,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:12:22,112 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 48.0) internal successors, (192), 4 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 538 [2021-11-20 06:12:22,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:12:22,127 INFO L225 Difference]: With dead ends: 26823 [2021-11-20 06:12:22,127 INFO L226 Difference]: Without dead ends: 14095 [2021-11-20 06:12:22,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:12:22,136 INFO L933 BasicCegarLoop]: 290 mSDtfsCounter, 105 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 697 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:12:22,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 697 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 259 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 06:12:22,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14095 states. [2021-11-20 06:12:22,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14095 to 12751. [2021-11-20 06:12:22,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12751 states, 12750 states have (on average 1.624470588235294) internal successors, (20712), 12750 states have internal predecessors, (20712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:22,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12751 states to 12751 states and 20712 transitions. [2021-11-20 06:12:22,605 INFO L78 Accepts]: Start accepts. Automaton has 12751 states and 20712 transitions. Word has length 538 [2021-11-20 06:12:22,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:12:22,605 INFO L470 AbstractCegarLoop]: Abstraction has 12751 states and 20712 transitions. [2021-11-20 06:12:22,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 48.0) internal successors, (192), 4 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:22,605 INFO L276 IsEmpty]: Start isEmpty. Operand 12751 states and 20712 transitions. [2021-11-20 06:12:22,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 542 [2021-11-20 06:12:22,617 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:12:22,617 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 13, 13, 12, 12, 11, 11, 10, 10, 10, 10, 10, 9, 9, 8, 8, 7, 7, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-20 06:12:22,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2021-11-20 06:12:22,618 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:12:22,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:12:22,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1332503124, now seen corresponding path program 1 times [2021-11-20 06:12:22,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:12:22,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37954782] [2021-11-20 06:12:22,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:12:22,619 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:12:22,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:12:22,848 INFO L134 CoverageAnalysis]: Checked inductivity of 2782 backedges. 1231 proven. 0 refuted. 0 times theorem prover too weak. 1551 trivial. 0 not checked. [2021-11-20 06:12:22,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:12:22,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37954782] [2021-11-20 06:12:22,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37954782] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:12:22,849 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:12:22,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:12:22,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371588364] [2021-11-20 06:12:22,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:12:22,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:12:22,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:12:22,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:12:22,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:12:22,852 INFO L87 Difference]: Start difference. First operand 12751 states and 20712 transitions. Second operand has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:24,865 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:12:25,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:12:25,741 INFO L93 Difference]: Finished difference Result 26823 states and 43175 transitions. [2021-11-20 06:12:25,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:12:25,741 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 541 [2021-11-20 06:12:25,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:12:25,756 INFO L225 Difference]: With dead ends: 26823 [2021-11-20 06:12:25,757 INFO L226 Difference]: Without dead ends: 14095 [2021-11-20 06:12:25,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:12:25,765 INFO L933 BasicCegarLoop]: 289 mSDtfsCounter, 97 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 695 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:12:25,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 695 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 259 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 06:12:25,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14095 states. [2021-11-20 06:12:26,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14095 to 12751. [2021-11-20 06:12:26,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12751 states, 12750 states have (on average 1.6222745098039215) internal successors, (20684), 12750 states have internal predecessors, (20684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:26,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12751 states to 12751 states and 20684 transitions. [2021-11-20 06:12:26,263 INFO L78 Accepts]: Start accepts. Automaton has 12751 states and 20684 transitions. Word has length 541 [2021-11-20 06:12:26,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:12:26,263 INFO L470 AbstractCegarLoop]: Abstraction has 12751 states and 20684 transitions. [2021-11-20 06:12:26,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:26,264 INFO L276 IsEmpty]: Start isEmpty. Operand 12751 states and 20684 transitions. [2021-11-20 06:12:26,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 543 [2021-11-20 06:12:26,278 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:12:26,279 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 14, 14, 12, 12, 11, 11, 10, 10, 10, 10, 10, 9, 9, 8, 8, 7, 7, 5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-20 06:12:26,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2021-11-20 06:12:26,279 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:12:26,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:12:26,280 INFO L85 PathProgramCache]: Analyzing trace with hash 689541331, now seen corresponding path program 1 times [2021-11-20 06:12:26,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:12:26,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640702062] [2021-11-20 06:12:26,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:12:26,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:12:26,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:12:26,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2810 backedges. 1300 proven. 0 refuted. 0 times theorem prover too weak. 1510 trivial. 0 not checked. [2021-11-20 06:12:26,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:12:26,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640702062] [2021-11-20 06:12:26,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640702062] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:12:26,513 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:12:26,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:12:26,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375918604] [2021-11-20 06:12:26,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:12:26,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:12:26,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:12:26,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:12:26,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:12:26,515 INFO L87 Difference]: Start difference. First operand 12751 states and 20684 transitions. Second operand has 4 states, 4 states have (on average 49.5) internal successors, (198), 4 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:28,173 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:12:28,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:12:28,954 INFO L93 Difference]: Finished difference Result 26823 states and 43411 transitions. [2021-11-20 06:12:28,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:12:28,955 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 49.5) internal successors, (198), 4 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 542 [2021-11-20 06:12:28,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:12:28,969 INFO L225 Difference]: With dead ends: 26823 [2021-11-20 06:12:28,970 INFO L226 Difference]: Without dead ends: 14095 [2021-11-20 06:12:28,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:12:28,980 INFO L933 BasicCegarLoop]: 239 mSDtfsCounter, 44 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-20 06:12:28,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 595 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-20 06:12:28,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14095 states. [2021-11-20 06:12:29,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14095 to 13479. [2021-11-20 06:12:29,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13479 states, 13478 states have (on average 1.628134738091705) internal successors, (21944), 13478 states have internal predecessors, (21944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:29,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13479 states to 13479 states and 21944 transitions. [2021-11-20 06:12:29,475 INFO L78 Accepts]: Start accepts. Automaton has 13479 states and 21944 transitions. Word has length 542 [2021-11-20 06:12:29,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:12:29,475 INFO L470 AbstractCegarLoop]: Abstraction has 13479 states and 21944 transitions. [2021-11-20 06:12:29,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 49.5) internal successors, (198), 4 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:29,475 INFO L276 IsEmpty]: Start isEmpty. Operand 13479 states and 21944 transitions. [2021-11-20 06:12:29,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 543 [2021-11-20 06:12:29,491 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:12:29,491 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 14, 13, 12, 12, 11, 11, 10, 10, 10, 10, 10, 9, 9, 8, 8, 7, 7, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 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] [2021-11-20 06:12:29,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2021-11-20 06:12:29,491 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:12:29,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:12:29,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1547618676, now seen corresponding path program 1 times [2021-11-20 06:12:29,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:12:29,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172834995] [2021-11-20 06:12:29,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:12:29,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:12:29,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:12:29,724 INFO L134 CoverageAnalysis]: Checked inductivity of 2795 backedges. 1244 proven. 0 refuted. 0 times theorem prover too weak. 1551 trivial. 0 not checked. [2021-11-20 06:12:29,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:12:29,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172834995] [2021-11-20 06:12:29,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172834995] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:12:29,725 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:12:29,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:12:29,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487323839] [2021-11-20 06:12:29,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:12:29,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:12:29,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:12:29,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:12:29,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:12:29,727 INFO L87 Difference]: Start difference. First operand 13479 states and 21944 transitions. Second operand has 4 states, 4 states have (on average 49.25) internal successors, (197), 4 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:31,739 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:12:32,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:12:32,669 INFO L93 Difference]: Finished difference Result 28167 states and 45481 transitions. [2021-11-20 06:12:32,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:12:32,670 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 49.25) internal successors, (197), 4 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 542 [2021-11-20 06:12:32,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:12:32,686 INFO L225 Difference]: With dead ends: 28167 [2021-11-20 06:12:32,687 INFO L226 Difference]: Without dead ends: 14711 [2021-11-20 06:12:32,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:12:32,696 INFO L933 BasicCegarLoop]: 285 mSDtfsCounter, 91 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 687 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:12:32,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 687 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 251 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 06:12:32,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14711 states. [2021-11-20 06:12:33,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14711 to 13479. [2021-11-20 06:12:33,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13479 states, 13478 states have (on average 1.6260572785279714) internal successors, (21916), 13478 states have internal predecessors, (21916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:33,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13479 states to 13479 states and 21916 transitions. [2021-11-20 06:12:33,247 INFO L78 Accepts]: Start accepts. Automaton has 13479 states and 21916 transitions. Word has length 542 [2021-11-20 06:12:33,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:12:33,248 INFO L470 AbstractCegarLoop]: Abstraction has 13479 states and 21916 transitions. [2021-11-20 06:12:33,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 49.25) internal successors, (197), 4 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:33,248 INFO L276 IsEmpty]: Start isEmpty. Operand 13479 states and 21916 transitions. [2021-11-20 06:12:33,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 546 [2021-11-20 06:12:33,263 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:12:33,264 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 14, 14, 13, 13, 12, 12, 10, 10, 10, 10, 10, 9, 9, 8, 8, 7, 7, 5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-20 06:12:33,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2021-11-20 06:12:33,264 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:12:33,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:12:33,265 INFO L85 PathProgramCache]: Analyzing trace with hash 863104783, now seen corresponding path program 1 times [2021-11-20 06:12:33,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:12:33,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758188565] [2021-11-20 06:12:33,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:12:33,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:12:33,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:12:33,502 INFO L134 CoverageAnalysis]: Checked inductivity of 2855 backedges. 1328 proven. 0 refuted. 0 times theorem prover too weak. 1527 trivial. 0 not checked. [2021-11-20 06:12:33,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:12:33,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758188565] [2021-11-20 06:12:33,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758188565] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:12:33,503 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:12:33,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:12:33,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621749039] [2021-11-20 06:12:33,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:12:33,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:12:33,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:12:33,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:12:33,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:12:33,506 INFO L87 Difference]: Start difference. First operand 13479 states and 21916 transitions. Second operand has 4 states, 4 states have (on average 50.25) internal successors, (201), 4 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:35,516 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:12:36,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:12:36,364 INFO L93 Difference]: Finished difference Result 27873 states and 45246 transitions. [2021-11-20 06:12:36,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:12:36,365 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 50.25) internal successors, (201), 4 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 545 [2021-11-20 06:12:36,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:12:36,382 INFO L225 Difference]: With dead ends: 27873 [2021-11-20 06:12:36,382 INFO L226 Difference]: Without dead ends: 14417 [2021-11-20 06:12:36,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:12:36,391 INFO L933 BasicCegarLoop]: 271 mSDtfsCounter, 58 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 10 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 659 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:12:36,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 659 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 219 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 06:12:36,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14417 states. [2021-11-20 06:12:36,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14417 to 13899. [2021-11-20 06:12:36,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13899 states, 13898 states have (on average 1.6303065189235861) internal successors, (22658), 13898 states have internal predecessors, (22658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:36,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13899 states to 13899 states and 22658 transitions. [2021-11-20 06:12:36,832 INFO L78 Accepts]: Start accepts. Automaton has 13899 states and 22658 transitions. Word has length 545 [2021-11-20 06:12:36,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:12:36,833 INFO L470 AbstractCegarLoop]: Abstraction has 13899 states and 22658 transitions. [2021-11-20 06:12:36,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 50.25) internal successors, (201), 4 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:36,833 INFO L276 IsEmpty]: Start isEmpty. Operand 13899 states and 22658 transitions. [2021-11-20 06:12:36,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 549 [2021-11-20 06:12:36,849 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:12:36,850 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 14, 14, 13, 13, 12, 12, 11, 11, 11, 11, 10, 9, 9, 8, 8, 7, 7, 4, 4, 3, 3, 2, 2, 2, 2, 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] [2021-11-20 06:12:36,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2021-11-20 06:12:36,850 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:12:36,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:12:36,851 INFO L85 PathProgramCache]: Analyzing trace with hash -666859260, now seen corresponding path program 1 times [2021-11-20 06:12:36,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:12:36,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279193019] [2021-11-20 06:12:36,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:12:36,851 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:12:36,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:12:37,330 INFO L134 CoverageAnalysis]: Checked inductivity of 2889 backedges. 1598 proven. 0 refuted. 0 times theorem prover too weak. 1291 trivial. 0 not checked. [2021-11-20 06:12:37,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:12:37,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279193019] [2021-11-20 06:12:37,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279193019] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:12:37,331 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:12:37,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 06:12:37,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925786543] [2021-11-20 06:12:37,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:12:37,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:12:37,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:12:37,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:12:37,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:12:37,333 INFO L87 Difference]: Start difference. First operand 13899 states and 22658 transitions. Second operand has 5 states, 5 states have (on average 42.6) internal successors, (213), 5 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:39,348 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:12:41,374 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:12:43,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:12:43,590 INFO L93 Difference]: Finished difference Result 44922 states and 73076 transitions. [2021-11-20 06:12:43,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:12:43,590 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 42.6) internal successors, (213), 5 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 548 [2021-11-20 06:12:43,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:12:43,638 INFO L225 Difference]: With dead ends: 44922 [2021-11-20 06:12:43,638 INFO L226 Difference]: Without dead ends: 31046 [2021-11-20 06:12:43,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:12:43,652 INFO L933 BasicCegarLoop]: 417 mSDtfsCounter, 260 mSDsluCounter, 761 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 57 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 1178 SdHoareTripleChecker+Invalid, 722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:12:43,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 1178 Invalid, 722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 663 Invalid, 2 Unknown, 0 Unchecked, 5.3s Time] [2021-11-20 06:12:43,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31046 states. [2021-11-20 06:12:44,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31046 to 13437. [2021-11-20 06:12:44,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13437 states, 13436 states have (on average 1.6248883596308425) internal successors, (21832), 13436 states have internal predecessors, (21832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:44,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13437 states to 13437 states and 21832 transitions. [2021-11-20 06:12:44,492 INFO L78 Accepts]: Start accepts. Automaton has 13437 states and 21832 transitions. Word has length 548 [2021-11-20 06:12:44,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:12:44,492 INFO L470 AbstractCegarLoop]: Abstraction has 13437 states and 21832 transitions. [2021-11-20 06:12:44,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.6) internal successors, (213), 5 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:44,492 INFO L276 IsEmpty]: Start isEmpty. Operand 13437 states and 21832 transitions. [2021-11-20 06:12:44,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 549 [2021-11-20 06:12:44,510 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:12:44,510 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 14, 14, 14, 13, 13, 12, 12, 11, 11, 10, 10, 10, 10, 10, 9, 9, 8, 8, 7, 7, 4, 4, 3, 3, 3, 2, 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] [2021-11-20 06:12:44,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2021-11-20 06:12:44,511 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:12:44,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:12:44,511 INFO L85 PathProgramCache]: Analyzing trace with hash -467253672, now seen corresponding path program 1 times [2021-11-20 06:12:44,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:12:44,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567142964] [2021-11-20 06:12:44,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:12:44,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:12:44,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:12:44,757 INFO L134 CoverageAnalysis]: Checked inductivity of 2801 backedges. 1228 proven. 0 refuted. 0 times theorem prover too weak. 1573 trivial. 0 not checked. [2021-11-20 06:12:44,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:12:44,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567142964] [2021-11-20 06:12:44,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567142964] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:12:44,758 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:12:44,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:12:44,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210155689] [2021-11-20 06:12:44,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:12:44,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:12:44,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:12:44,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:12:44,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:12:44,762 INFO L87 Difference]: Start difference. First operand 13437 states and 21832 transitions. Second operand has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:46,773 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:12:47,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:12:47,906 INFO L93 Difference]: Finished difference Result 28083 states and 45257 transitions. [2021-11-20 06:12:47,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:12:47,907 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 548 [2021-11-20 06:12:47,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:12:47,930 INFO L225 Difference]: With dead ends: 28083 [2021-11-20 06:12:47,930 INFO L226 Difference]: Without dead ends: 14669 [2021-11-20 06:12:47,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:12:47,940 INFO L933 BasicCegarLoop]: 284 mSDtfsCounter, 97 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 685 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:12:47,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 685 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 251 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2021-11-20 06:12:47,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14669 states. [2021-11-20 06:12:48,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14669 to 13437. [2021-11-20 06:12:48,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13437 states, 13436 states have (on average 1.622804406073236) internal successors, (21804), 13436 states have internal predecessors, (21804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:48,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13437 states to 13437 states and 21804 transitions. [2021-11-20 06:12:48,471 INFO L78 Accepts]: Start accepts. Automaton has 13437 states and 21804 transitions. Word has length 548 [2021-11-20 06:12:48,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:12:48,472 INFO L470 AbstractCegarLoop]: Abstraction has 13437 states and 21804 transitions. [2021-11-20 06:12:48,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:48,472 INFO L276 IsEmpty]: Start isEmpty. Operand 13437 states and 21804 transitions. [2021-11-20 06:12:48,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 549 [2021-11-20 06:12:48,487 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:12:48,488 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 14, 14, 13, 13, 12, 12, 11, 11, 11, 11, 10, 9, 9, 8, 8, 7, 7, 4, 4, 3, 3, 2, 2, 2, 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] [2021-11-20 06:12:48,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2021-11-20 06:12:48,488 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:12:48,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:12:48,488 INFO L85 PathProgramCache]: Analyzing trace with hash 2002160190, now seen corresponding path program 1 times [2021-11-20 06:12:48,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:12:48,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664334244] [2021-11-20 06:12:48,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:12:48,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:12:48,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:12:48,814 INFO L134 CoverageAnalysis]: Checked inductivity of 2889 backedges. 1338 proven. 0 refuted. 0 times theorem prover too weak. 1551 trivial. 0 not checked. [2021-11-20 06:12:48,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:12:48,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664334244] [2021-11-20 06:12:48,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664334244] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:12:48,815 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:12:48,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:12:48,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974599925] [2021-11-20 06:12:48,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:12:48,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:12:48,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:12:48,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:12:48,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:12:48,818 INFO L87 Difference]: Start difference. First operand 13437 states and 21804 transitions. Second operand has 4 states, 4 states have (on average 50.75) internal successors, (203), 4 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:50,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:12:50,911 INFO L93 Difference]: Finished difference Result 27999 states and 45089 transitions. [2021-11-20 06:12:50,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:12:50,912 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 50.75) internal successors, (203), 4 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 548 [2021-11-20 06:12:50,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:12:50,937 INFO L225 Difference]: With dead ends: 27999 [2021-11-20 06:12:50,937 INFO L226 Difference]: Without dead ends: 14585 [2021-11-20 06:12:50,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:12:50,950 INFO L933 BasicCegarLoop]: 282 mSDtfsCounter, 79 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 681 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:12:50,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 681 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-20 06:12:50,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14585 states. [2021-11-20 06:12:51,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14585 to 13437. [2021-11-20 06:12:51,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13437 states, 13436 states have (on average 1.6207204525156296) internal successors, (21776), 13436 states have internal predecessors, (21776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:51,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13437 states to 13437 states and 21776 transitions. [2021-11-20 06:12:51,445 INFO L78 Accepts]: Start accepts. Automaton has 13437 states and 21776 transitions. Word has length 548 [2021-11-20 06:12:51,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:12:51,446 INFO L470 AbstractCegarLoop]: Abstraction has 13437 states and 21776 transitions. [2021-11-20 06:12:51,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 50.75) internal successors, (203), 4 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:51,446 INFO L276 IsEmpty]: Start isEmpty. Operand 13437 states and 21776 transitions. [2021-11-20 06:12:51,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 549 [2021-11-20 06:12:51,461 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:12:51,462 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 14, 14, 13, 13, 12, 12, 11, 11, 11, 11, 10, 9, 9, 8, 8, 7, 7, 4, 4, 3, 3, 2, 2, 2, 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] [2021-11-20 06:12:51,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2021-11-20 06:12:51,462 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:12:51,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:12:51,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1632805314, now seen corresponding path program 1 times [2021-11-20 06:12:51,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:12:51,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155523201] [2021-11-20 06:12:51,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:12:51,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:12:51,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:12:54,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2889 backedges. 1195 proven. 1429 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2021-11-20 06:12:54,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:12:54,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155523201] [2021-11-20 06:12:54,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155523201] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:12:54,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689617405] [2021-11-20 06:12:54,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:12:54,310 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:12:54,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf02b8d5-0555-40ab-935d-3d45ba0775b0/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:12:54,321 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf02b8d5-0555-40ab-935d-3d45ba0775b0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:12:54,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf02b8d5-0555-40ab-935d-3d45ba0775b0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 06:12:54,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:12:54,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 70 conjunts are in the unsatisfiable core [2021-11-20 06:12:54,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:12:54,920 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 06:12:54,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-20 06:12:55,146 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-20 06:12:55,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 10 [2021-11-20 06:12:55,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2021-11-20 06:12:55,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-20 06:12:55,815 INFO L354 Elim1Store]: treesize reduction 43, result has 36.8 percent of original size [2021-11-20 06:12:55,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 130 treesize of output 106 [2021-11-20 06:12:55,845 INFO L354 Elim1Store]: treesize reduction 27, result has 41.3 percent of original size [2021-11-20 06:12:55,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 76 treesize of output 70 [2021-11-20 06:12:55,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 50 [2021-11-20 06:12:55,928 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-11-20 06:12:55,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 67 [2021-11-20 06:12:55,968 INFO L354 Elim1Store]: treesize reduction 102, result has 34.2 percent of original size [2021-11-20 06:12:55,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 88 [2021-11-20 06:12:55,988 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-11-20 06:12:55,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 63 [2021-11-20 06:12:57,017 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-11-20 06:12:57,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 140 treesize of output 112 [2021-11-20 06:12:57,076 INFO L354 Elim1Store]: treesize reduction 216, result has 23.4 percent of original size [2021-11-20 06:12:57,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 121 treesize of output 128 [2021-11-20 06:12:57,089 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-11-20 06:12:57,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 152 treesize of output 112 [2021-11-20 06:12:59,312 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-11-20 06:12:59,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 138 treesize of output 116 [2021-11-20 06:12:59,384 INFO L354 Elim1Store]: treesize reduction 332, result has 12.9 percent of original size [2021-11-20 06:12:59,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 119 treesize of output 115 [2021-11-20 06:12:59,400 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-11-20 06:12:59,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 78 [2021-11-20 06:12:59,523 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-11-20 06:12:59,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 93 [2021-11-20 06:12:59,590 INFO L354 Elim1Store]: treesize reduction 332, result has 12.9 percent of original size [2021-11-20 06:12:59,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 90 treesize of output 92 [2021-11-20 06:12:59,603 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-11-20 06:12:59,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 61 [2021-11-20 06:13:00,695 INFO L354 Elim1Store]: treesize reduction 160, result has 35.0 percent of original size [2021-11-20 06:13:00,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 205 treesize of output 220 [2021-11-20 06:13:00,829 INFO L354 Elim1Store]: treesize reduction 90, result has 40.0 percent of original size [2021-11-20 06:13:00,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 223 treesize of output 214 [2021-11-20 06:13:01,035 INFO L354 Elim1Store]: treesize reduction 212, result has 39.8 percent of original size [2021-11-20 06:13:01,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 203 treesize of output 297 [2021-11-20 06:13:42,322 INFO L354 Elim1Store]: treesize reduction 214, result has 28.9 percent of original size [2021-11-20 06:13:42,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 523 treesize of output 501 [2021-11-20 06:13:42,759 INFO L354 Elim1Store]: treesize reduction 204, result has 28.9 percent of original size [2021-11-20 06:13:42,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 564 treesize of output 528 [2021-11-20 06:13:43,095 INFO L354 Elim1Store]: treesize reduction 222, result has 22.6 percent of original size [2021-11-20 06:13:43,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 607 treesize of output 545 [2021-11-20 06:13:43,322 INFO L354 Elim1Store]: treesize reduction 234, result has 22.3 percent of original size [2021-11-20 06:13:43,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 628 treesize of output 560 [2021-11-20 06:13:43,421 INFO L354 Elim1Store]: treesize reduction 356, result has 9.4 percent of original size [2021-11-20 06:13:43,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 647 treesize of output 614