./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl/s3_srvr.blast.15.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_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/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_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.15.i.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/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_edf24074-f0c2-439c-9e55-a66e01ca6288/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 4d1a05335dcd475270df3d2b7e447bf62801b1b41377a4a2d9fc94b2523fc1ec --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:42:52,186 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:42:52,188 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:42:52,220 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:42:52,221 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:42:52,222 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:42:52,224 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:42:52,226 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:42:52,228 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:42:52,229 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:42:52,231 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:42:52,232 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:42:52,233 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:42:52,234 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:42:52,236 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:42:52,238 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:42:52,239 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:42:52,240 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:42:52,242 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:42:52,245 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:42:52,248 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:42:52,250 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:42:52,251 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:42:52,252 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:42:52,256 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:42:52,257 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:42:52,258 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:42:52,259 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:42:52,261 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:42:52,262 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:42:52,262 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:42:52,263 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:42:52,264 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:42:52,265 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:42:52,266 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:42:52,266 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:42:52,267 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:42:52,268 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:42:52,268 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:42:52,269 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:42:52,270 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:42:52,270 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 06:42:52,315 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:42:52,315 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:42:52,316 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:42:52,316 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:42:52,318 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:42:52,318 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:42:52,319 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:42:52,319 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:42:52,320 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:42:52,320 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:42:52,321 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 06:42:52,321 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 06:42:52,322 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 06:42:52,322 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:42:52,322 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 06:42:52,322 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:42:52,322 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 06:42:52,323 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 06:42:52,323 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 06:42:52,323 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:42:52,323 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 06:42:52,324 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:42:52,324 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:42:52,324 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:42:52,324 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:42:52,325 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:42:52,325 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:42:52,325 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 06:42:52,325 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 06:42:52,327 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 06:42:52,328 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 06:42:52,328 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 06:42:52,328 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 06:42:52,328 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:42:52,329 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_edf24074-f0c2-439c-9e55-a66e01ca6288/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d1a05335dcd475270df3d2b7e447bf62801b1b41377a4a2d9fc94b2523fc1ec [2021-11-20 06:42:52,583 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:42:52,612 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:42:52,614 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:42:52,616 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:42:52,617 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:42:52,619 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/openssl/s3_srvr.blast.15.i.cil-1.c [2021-11-20 06:42:52,678 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/data/df18266a2/c842e84605264c5eb91f045835a3d463/FLAGd13833fde [2021-11-20 06:42:53,297 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:42:53,298 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/sv-benchmarks/c/openssl/s3_srvr.blast.15.i.cil-1.c [2021-11-20 06:42:53,320 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/data/df18266a2/c842e84605264c5eb91f045835a3d463/FLAGd13833fde [2021-11-20 06:42:53,519 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/data/df18266a2/c842e84605264c5eb91f045835a3d463 [2021-11-20 06:42:53,521 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:42:53,522 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:42:53,524 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:42:53,524 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:42:53,529 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:42:53,529 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:42:53" (1/1) ... [2021-11-20 06:42:53,530 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4552729 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:42:53, skipping insertion in model container [2021-11-20 06:42:53,531 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:42:53" (1/1) ... [2021-11-20 06:42:53,537 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:42:53,595 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:42:54,154 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_edf24074-f0c2-439c-9e55-a66e01ca6288/sv-benchmarks/c/openssl/s3_srvr.blast.15.i.cil-1.c[75550,75563] [2021-11-20 06:42:54,172 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:42:54,197 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:42:54,369 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_edf24074-f0c2-439c-9e55-a66e01ca6288/sv-benchmarks/c/openssl/s3_srvr.blast.15.i.cil-1.c[75550,75563] [2021-11-20 06:42:54,374 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:42:54,393 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:42:54,394 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:42:54 WrapperNode [2021-11-20 06:42:54,394 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:42:54,396 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:42:54,396 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:42:54,396 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:42:54,403 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:42:54" (1/1) ... [2021-11-20 06:42:54,433 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:42:54" (1/1) ... [2021-11-20 06:42:54,481 INFO L137 Inliner]: procedures = 31, calls = 223, calls flagged for inlining = 7, calls inlined = 3, statements flattened = 799 [2021-11-20 06:42:54,482 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:42:54,482 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:42:54,482 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:42:54,483 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:42:54,489 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:42:54" (1/1) ... [2021-11-20 06:42:54,490 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:42:54" (1/1) ... [2021-11-20 06:42:54,499 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:42:54" (1/1) ... [2021-11-20 06:42:54,499 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:42:54" (1/1) ... [2021-11-20 06:42:54,572 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:42:54" (1/1) ... [2021-11-20 06:42:54,581 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:42:54" (1/1) ... [2021-11-20 06:42:54,586 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:42:54" (1/1) ... [2021-11-20 06:42:54,592 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:42:54,593 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:42:54,593 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:42:54,593 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:42:54,594 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:42:54" (1/1) ... [2021-11-20 06:42:54,601 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:42:54,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:42:54,637 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:42:54,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:42:54,737 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 06:42:54,737 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 06:42:54,737 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 06:42:54,738 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 06:42:54,738 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 06:42:54,738 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 06:42:54,738 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 06:42:54,738 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:42:54,738 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:42:54,931 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:42:54,933 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:42:54,965 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-20 06:42:56,295 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-11-20 06:42:56,296 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-11-20 06:42:56,296 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:42:56,304 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:42:56,305 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-20 06:42:56,307 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:42:56 BoogieIcfgContainer [2021-11-20 06:42:56,307 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:42:56,309 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:42:56,309 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:42:56,312 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:42:56,313 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:42:53" (1/3) ... [2021-11-20 06:42:56,313 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12da9385 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:42:56, skipping insertion in model container [2021-11-20 06:42:56,313 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:42:54" (2/3) ... [2021-11-20 06:42:56,314 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12da9385 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:42:56, skipping insertion in model container [2021-11-20 06:42:56,314 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:42:56" (3/3) ... [2021-11-20 06:42:56,315 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.15.i.cil-1.c [2021-11-20 06:42:56,320 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:42:56,320 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 06:42:56,375 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:42:56,387 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 06:42:56,387 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 06:42:56,410 INFO L276 IsEmpty]: Start isEmpty. Operand has 153 states, 151 states have (on average 1.7218543046357615) internal successors, (260), 152 states have internal predecessors, (260), 0 states have call successors, (0), 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 06:42:56,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-20 06:42:56,420 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:42:56,421 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 06:42:56,422 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:42:56,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:42:56,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1630857892, now seen corresponding path program 1 times [2021-11-20 06:42:56,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:42:56,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955487396] [2021-11-20 06:42:56,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:42:56,437 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:42:56,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:42:56,781 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 06:42:56,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:42:56,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955487396] [2021-11-20 06:42:56,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955487396] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:42:56,783 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:42:56,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:42:56,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86578654] [2021-11-20 06:42:56,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:42:56,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:42:56,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:42:56,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:42:56,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:42:56,819 INFO L87 Difference]: Start difference. First operand has 153 states, 151 states have (on average 1.7218543046357615) internal successors, (260), 152 states have internal predecessors, (260), 0 states have call successors, (0), 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 06:42:58,850 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 06:42:59,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:42:59,410 INFO L93 Difference]: Finished difference Result 331 states and 562 transitions. [2021-11-20 06:42:59,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:42:59,412 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 06:42:59,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:42:59,424 INFO L225 Difference]: With dead ends: 331 [2021-11-20 06:42:59,424 INFO L226 Difference]: Without dead ends: 168 [2021-11-20 06:42:59,427 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 06:42:59,431 INFO L933 BasicCegarLoop]: 230 mSDtfsCounter, 36 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 603 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:42:59,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 603 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 156 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2021-11-20 06:42:59,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-11-20 06:42:59,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 151. [2021-11-20 06:42:59,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.5666666666666667) internal successors, (235), 150 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 06:42:59,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 235 transitions. [2021-11-20 06:42:59,480 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 235 transitions. Word has length 45 [2021-11-20 06:42:59,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:42:59,481 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 235 transitions. [2021-11-20 06:42:59,481 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 06:42:59,481 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 235 transitions. [2021-11-20 06:42:59,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-20 06:42:59,484 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:42:59,485 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 06:42:59,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 06:42:59,485 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:42:59,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:42:59,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1777294036, now seen corresponding path program 1 times [2021-11-20 06:42:59,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:42:59,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202800956] [2021-11-20 06:42:59,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:42:59,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:42:59,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:42:59,666 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 06:42:59,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:42:59,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202800956] [2021-11-20 06:42:59,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202800956] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:42:59,670 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:42:59,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:42:59,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010946537] [2021-11-20 06:42:59,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:42:59,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:42:59,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:42:59,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:42:59,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:42:59,675 INFO L87 Difference]: Start difference. First operand 151 states and 235 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 06:43:00,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:43:00,745 INFO L93 Difference]: Finished difference Result 298 states and 458 transitions. [2021-11-20 06:43:00,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:43:00,746 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 06:43:00,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:43:00,748 INFO L225 Difference]: With dead ends: 298 [2021-11-20 06:43:00,748 INFO L226 Difference]: Without dead ends: 168 [2021-11-20 06:43:00,749 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 06:43:00,751 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 24 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:43:00,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 489 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-20 06:43:00,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-11-20 06:43:00,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 151. [2021-11-20 06:43:00,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.56) internal successors, (234), 150 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 06:43:00,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 234 transitions. [2021-11-20 06:43:00,765 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 234 transitions. Word has length 58 [2021-11-20 06:43:00,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:43:00,766 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 234 transitions. [2021-11-20 06:43:00,766 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 06:43:00,766 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 234 transitions. [2021-11-20 06:43:00,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-20 06:43:00,769 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:43:00,769 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 06:43:00,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 06:43:00,769 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:43:00,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:43:00,770 INFO L85 PathProgramCache]: Analyzing trace with hash -931514139, now seen corresponding path program 1 times [2021-11-20 06:43:00,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:43:00,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684180816] [2021-11-20 06:43:00,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:43:00,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:43:00,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:00,909 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 06:43:00,909 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:43:00,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684180816] [2021-11-20 06:43:00,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684180816] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:43:00,910 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:43:00,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:43:00,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242111630] [2021-11-20 06:43:00,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:43:00,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:43:00,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:43:00,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:43:00,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:43:00,913 INFO L87 Difference]: Start difference. First operand 151 states and 234 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 06:43:02,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:43:02,221 INFO L93 Difference]: Finished difference Result 297 states and 456 transitions. [2021-11-20 06:43:02,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:43:02,221 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 06:43:02,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:43:02,223 INFO L225 Difference]: With dead ends: 297 [2021-11-20 06:43:02,223 INFO L226 Difference]: Without dead ends: 167 [2021-11-20 06:43:02,224 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 06:43:02,226 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 28 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:43:02,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 491 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-20 06:43:02,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-11-20 06:43:02,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 151. [2021-11-20 06:43:02,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.5533333333333332) internal successors, (233), 150 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 06:43:02,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 233 transitions. [2021-11-20 06:43:02,238 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 233 transitions. Word has length 59 [2021-11-20 06:43:02,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:43:02,239 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 233 transitions. [2021-11-20 06:43:02,239 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 06:43:02,239 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 233 transitions. [2021-11-20 06:43:02,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-20 06:43:02,242 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:43:02,242 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 06:43:02,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 06:43:02,243 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:43:02,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:43:02,244 INFO L85 PathProgramCache]: Analyzing trace with hash 955389305, now seen corresponding path program 1 times [2021-11-20 06:43:02,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:43:02,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298363204] [2021-11-20 06:43:02,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:43:02,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:43:02,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:02,394 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 06:43:02,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:43:02,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298363204] [2021-11-20 06:43:02,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298363204] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:43:02,397 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:43:02,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:43:02,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274694847] [2021-11-20 06:43:02,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:43:02,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:43:02,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:43:02,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:43:02,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:43:02,405 INFO L87 Difference]: Start difference. First operand 151 states and 233 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 06:43:04,414 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 06:43:04,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:43:04,754 INFO L93 Difference]: Finished difference Result 297 states and 455 transitions. [2021-11-20 06:43:04,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:43:04,755 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 06:43:04,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:43:04,756 INFO L225 Difference]: With dead ends: 297 [2021-11-20 06:43:04,756 INFO L226 Difference]: Without dead ends: 167 [2021-11-20 06:43:04,757 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 06:43:04,758 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 26 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:43:04,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 491 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 146 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 06:43:04,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-11-20 06:43:04,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 151. [2021-11-20 06:43:04,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.5466666666666666) internal successors, (232), 150 states have internal predecessors, (232), 0 states have call successors, (0), 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 06:43:04,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 232 transitions. [2021-11-20 06:43:04,772 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 232 transitions. Word has length 59 [2021-11-20 06:43:04,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:43:04,772 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 232 transitions. [2021-11-20 06:43:04,772 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 06:43:04,773 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 232 transitions. [2021-11-20 06:43:04,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-20 06:43:04,775 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:43:04,776 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 06:43:04,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 06:43:04,776 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:43:04,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:43:04,777 INFO L85 PathProgramCache]: Analyzing trace with hash 103272528, now seen corresponding path program 1 times [2021-11-20 06:43:04,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:43:04,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125383289] [2021-11-20 06:43:04,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:43:04,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:43:04,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:04,866 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 06:43:04,867 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:43:04,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125383289] [2021-11-20 06:43:04,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125383289] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:43:04,868 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:43:04,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:43:04,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650932177] [2021-11-20 06:43:04,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:43:04,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:43:04,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:43:04,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:43:04,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:43:04,870 INFO L87 Difference]: Start difference. First operand 151 states and 232 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 06:43:06,880 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 06:43:07,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:43:07,205 INFO L93 Difference]: Finished difference Result 296 states and 453 transitions. [2021-11-20 06:43:07,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:43:07,206 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 06:43:07,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:43:07,207 INFO L225 Difference]: With dead ends: 296 [2021-11-20 06:43:07,207 INFO L226 Difference]: Without dead ends: 166 [2021-11-20 06:43:07,208 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 06:43:07,209 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 19 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:43:07,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 493 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 144 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 06:43:07,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-11-20 06:43:07,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 151. [2021-11-20 06:43:07,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.54) internal successors, (231), 150 states have internal predecessors, (231), 0 states have call successors, (0), 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 06:43:07,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 231 transitions. [2021-11-20 06:43:07,219 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 231 transitions. Word has length 59 [2021-11-20 06:43:07,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:43:07,219 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 231 transitions. [2021-11-20 06:43:07,219 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 06:43:07,220 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 231 transitions. [2021-11-20 06:43:07,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-20 06:43:07,222 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:43:07,222 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 06:43:07,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 06:43:07,223 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:43:07,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:43:07,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1899947760, now seen corresponding path program 1 times [2021-11-20 06:43:07,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:43:07,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910615550] [2021-11-20 06:43:07,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:43:07,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:43:07,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:07,297 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 06:43:07,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:43:07,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910615550] [2021-11-20 06:43:07,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910615550] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:43:07,298 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:43:07,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:43:07,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451843131] [2021-11-20 06:43:07,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:43:07,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:43:07,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:43:07,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:43:07,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:43:07,300 INFO L87 Difference]: Start difference. First operand 151 states and 231 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 06:43:09,308 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 06:43:09,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:43:09,577 INFO L93 Difference]: Finished difference Result 294 states and 450 transitions. [2021-11-20 06:43:09,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:43:09,578 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 06:43:09,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:43:09,579 INFO L225 Difference]: With dead ends: 294 [2021-11-20 06:43:09,579 INFO L226 Difference]: Without dead ends: 164 [2021-11-20 06:43:09,579 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 06:43:09,580 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 19 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:43:09,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 497 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 140 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 06:43:09,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-11-20 06:43:09,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 151. [2021-11-20 06:43:09,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.5333333333333334) internal successors, (230), 150 states have internal predecessors, (230), 0 states have call successors, (0), 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 06:43:09,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 230 transitions. [2021-11-20 06:43:09,588 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 230 transitions. Word has length 59 [2021-11-20 06:43:09,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:43:09,589 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 230 transitions. [2021-11-20 06:43:09,589 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 06:43:09,589 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 230 transitions. [2021-11-20 06:43:09,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-20 06:43:09,594 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:43:09,594 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 06:43:09,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 06:43:09,595 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:43:09,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:43:09,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1057401475, now seen corresponding path program 1 times [2021-11-20 06:43:09,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:43:09,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769281692] [2021-11-20 06:43:09,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:43:09,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:43:09,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:09,659 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 06:43:09,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:43:09,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769281692] [2021-11-20 06:43:09,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769281692] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:43:09,660 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:43:09,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:43:09,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986673781] [2021-11-20 06:43:09,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:43:09,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:43:09,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:43:09,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:43:09,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:43:09,663 INFO L87 Difference]: Start difference. First operand 151 states and 230 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 06:43:11,673 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 06:43:11,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:43:11,975 INFO L93 Difference]: Finished difference Result 294 states and 449 transitions. [2021-11-20 06:43:11,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:43:11,976 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 06:43:11,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:43:11,977 INFO L225 Difference]: With dead ends: 294 [2021-11-20 06:43:11,978 INFO L226 Difference]: Without dead ends: 164 [2021-11-20 06:43:11,978 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 06:43:11,979 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 22 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:43:11,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 497 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 140 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 06:43:11,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-11-20 06:43:11,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 151. [2021-11-20 06:43:11,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.5266666666666666) internal successors, (229), 150 states have internal predecessors, (229), 0 states have call successors, (0), 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 06:43:11,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 229 transitions. [2021-11-20 06:43:11,986 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 229 transitions. Word has length 60 [2021-11-20 06:43:11,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:43:11,986 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 229 transitions. [2021-11-20 06:43:11,986 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 06:43:11,987 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 229 transitions. [2021-11-20 06:43:11,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-20 06:43:11,988 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:43:11,988 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 06:43:11,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-20 06:43:11,989 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:43:11,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:43:11,990 INFO L85 PathProgramCache]: Analyzing trace with hash -2059610818, now seen corresponding path program 1 times [2021-11-20 06:43:11,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:43:11,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671610286] [2021-11-20 06:43:11,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:43:11,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:43:12,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:12,068 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 06:43:12,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:43:12,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671610286] [2021-11-20 06:43:12,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671610286] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:43:12,069 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:43:12,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:43:12,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382076343] [2021-11-20 06:43:12,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:43:12,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:43:12,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:43:12,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:43:12,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:43:12,073 INFO L87 Difference]: Start difference. First operand 151 states and 229 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 06:43:13,914 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:43:14,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:43:14,205 INFO L93 Difference]: Finished difference Result 294 states and 448 transitions. [2021-11-20 06:43:14,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:43:14,206 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 06:43:14,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:43:14,208 INFO L225 Difference]: With dead ends: 294 [2021-11-20 06:43:14,208 INFO L226 Difference]: Without dead ends: 164 [2021-11-20 06:43:14,208 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 06:43:14,209 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 20 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:43:14,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 497 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-20 06:43:14,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-11-20 06:43:14,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 151. [2021-11-20 06:43:14,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.52) internal successors, (228), 150 states have internal predecessors, (228), 0 states have call successors, (0), 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 06:43:14,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 228 transitions. [2021-11-20 06:43:14,216 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 228 transitions. Word has length 61 [2021-11-20 06:43:14,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:43:14,216 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 228 transitions. [2021-11-20 06:43:14,216 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 06:43:14,216 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 228 transitions. [2021-11-20 06:43:14,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-20 06:43:14,217 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:43:14,217 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 06:43:14,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-20 06:43:14,218 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:43:14,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:43:14,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1798566686, now seen corresponding path program 1 times [2021-11-20 06:43:14,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:43:14,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027043716] [2021-11-20 06:43:14,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:43:14,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:43:14,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:14,280 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 06:43:14,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:43:14,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027043716] [2021-11-20 06:43:14,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027043716] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:43:14,281 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:43:14,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:43:14,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265875346] [2021-11-20 06:43:14,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:43:14,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:43:14,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:43:14,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:43:14,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:43:14,283 INFO L87 Difference]: Start difference. First operand 151 states and 228 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 06:43:16,294 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 06:43:16,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:43:16,573 INFO L93 Difference]: Finished difference Result 284 states and 434 transitions. [2021-11-20 06:43:16,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:43:16,573 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 06:43:16,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:43:16,575 INFO L225 Difference]: With dead ends: 284 [2021-11-20 06:43:16,575 INFO L226 Difference]: Without dead ends: 154 [2021-11-20 06:43:16,575 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 06:43:16,576 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 11 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 511 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 06:43:16,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 511 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 126 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 06:43:16,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-11-20 06:43:16,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 151. [2021-11-20 06:43:16,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.5133333333333334) internal successors, (227), 150 states have internal predecessors, (227), 0 states have call successors, (0), 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 06:43:16,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 227 transitions. [2021-11-20 06:43:16,584 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 227 transitions. Word has length 62 [2021-11-20 06:43:16,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:43:16,584 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 227 transitions. [2021-11-20 06:43:16,585 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 06:43:16,585 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 227 transitions. [2021-11-20 06:43:16,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-20 06:43:16,585 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:43:16,586 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 06:43:16,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-20 06:43:16,586 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:43:16,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:43:16,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1884527178, now seen corresponding path program 1 times [2021-11-20 06:43:16,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:43:16,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106973221] [2021-11-20 06:43:16,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:43:16,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:43:16,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:16,691 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 06:43:16,692 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:43:16,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106973221] [2021-11-20 06:43:16,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106973221] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:43:16,692 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:43:16,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:43:16,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389417803] [2021-11-20 06:43:16,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:43:16,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:43:16,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:43:16,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:43:16,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:43:16,694 INFO L87 Difference]: Start difference. First operand 151 states and 227 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 06:43:18,702 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 06:43:19,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:43:19,009 INFO L93 Difference]: Finished difference Result 324 states and 495 transitions. [2021-11-20 06:43:19,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:43:19,010 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 06:43:19,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:43:19,011 INFO L225 Difference]: With dead ends: 324 [2021-11-20 06:43:19,011 INFO L226 Difference]: Without dead ends: 194 [2021-11-20 06:43:19,012 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 06:43:19,013 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 34 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:43:19,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 509 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 167 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 06:43:19,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-11-20 06:43:19,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 173. [2021-11-20 06:43:19,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.5406976744186047) internal successors, (265), 172 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 06:43:19,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 265 transitions. [2021-11-20 06:43:19,023 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 265 transitions. Word has length 62 [2021-11-20 06:43:19,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:43:19,025 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 265 transitions. [2021-11-20 06:43:19,026 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 06:43:19,026 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 265 transitions. [2021-11-20 06:43:19,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-20 06:43:19,027 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:43:19,027 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 06:43:19,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-20 06:43:19,028 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:43:19,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:43:19,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1383151450, now seen corresponding path program 1 times [2021-11-20 06:43:19,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:43:19,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670908712] [2021-11-20 06:43:19,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:43:19,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:43:19,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:19,131 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 06:43:19,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:43:19,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670908712] [2021-11-20 06:43:19,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670908712] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:43:19,132 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:43:19,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:43:19,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315233172] [2021-11-20 06:43:19,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:43:19,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:43:19,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:43:19,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:43:19,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:43:19,135 INFO L87 Difference]: Start difference. First operand 173 states and 265 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 06:43:20,780 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:43:21,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:43:21,071 INFO L93 Difference]: Finished difference Result 346 states and 532 transitions. [2021-11-20 06:43:21,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:43:21,072 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 06:43:21,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:43:21,074 INFO L225 Difference]: With dead ends: 346 [2021-11-20 06:43:21,074 INFO L226 Difference]: Without dead ends: 194 [2021-11-20 06:43:21,074 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 06:43:21,075 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 39 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-20 06:43:21,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 509 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-20 06:43:21,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-11-20 06:43:21,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 173. [2021-11-20 06:43:21,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.5348837209302326) internal successors, (264), 172 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 06:43:21,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 264 transitions. [2021-11-20 06:43:21,082 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 264 transitions. Word has length 75 [2021-11-20 06:43:21,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:43:21,082 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 264 transitions. [2021-11-20 06:43:21,083 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 06:43:21,083 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 264 transitions. [2021-11-20 06:43:21,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-20 06:43:21,084 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:43:21,084 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 06:43:21,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-20 06:43:21,085 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:43:21,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:43:21,085 INFO L85 PathProgramCache]: Analyzing trace with hash -121076397, now seen corresponding path program 1 times [2021-11-20 06:43:21,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:43:21,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354371597] [2021-11-20 06:43:21,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:43:21,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:43:21,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:21,139 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 06:43:21,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:43:21,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354371597] [2021-11-20 06:43:21,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354371597] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:43:21,140 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:43:21,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:43:21,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529026575] [2021-11-20 06:43:21,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:43:21,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:43:21,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:43:21,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:43:21,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:43:21,142 INFO L87 Difference]: Start difference. First operand 173 states and 264 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 06:43:21,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:43:21,992 INFO L93 Difference]: Finished difference Result 345 states and 529 transitions. [2021-11-20 06:43:21,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:43:21,993 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 06:43:21,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:43:21,994 INFO L225 Difference]: With dead ends: 345 [2021-11-20 06:43:21,994 INFO L226 Difference]: Without dead ends: 193 [2021-11-20 06:43:21,994 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 06:43:21,995 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 43 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 06:43:21,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 511 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-20 06:43:21,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-11-20 06:43:21,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 173. [2021-11-20 06:43:21,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.5290697674418605) internal successors, (263), 172 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 06:43:22,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 263 transitions. [2021-11-20 06:43:22,000 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 263 transitions. Word has length 76 [2021-11-20 06:43:22,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:43:22,000 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 263 transitions. [2021-11-20 06:43:22,000 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 06:43:22,000 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 263 transitions. [2021-11-20 06:43:22,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-20 06:43:22,001 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:43:22,001 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 06:43:22,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-20 06:43:22,001 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:43:22,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:43:22,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1765827047, now seen corresponding path program 1 times [2021-11-20 06:43:22,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:43:22,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536796355] [2021-11-20 06:43:22,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:43:22,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:43:22,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:22,070 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 06:43:22,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:43:22,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536796355] [2021-11-20 06:43:22,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536796355] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:43:22,071 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:43:22,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:43:22,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821669871] [2021-11-20 06:43:22,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:43:22,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:43:22,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:43:22,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:43:22,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:43:22,073 INFO L87 Difference]: Start difference. First operand 173 states and 263 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 06:43:23,488 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:43:23,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:43:23,781 INFO L93 Difference]: Finished difference Result 345 states and 527 transitions. [2021-11-20 06:43:23,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:43:23,782 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 06:43:23,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:43:23,783 INFO L225 Difference]: With dead ends: 345 [2021-11-20 06:43:23,783 INFO L226 Difference]: Without dead ends: 193 [2021-11-20 06:43:23,784 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 06:43:23,784 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 41 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:43:23,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 511 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-20 06:43:23,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-11-20 06:43:23,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 173. [2021-11-20 06:43:23,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.5232558139534884) internal successors, (262), 172 states have internal predecessors, (262), 0 states have call successors, (0), 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 06:43:23,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 262 transitions. [2021-11-20 06:43:23,791 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 262 transitions. Word has length 76 [2021-11-20 06:43:23,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:43:23,792 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 262 transitions. [2021-11-20 06:43:23,792 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 06:43:23,792 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 262 transitions. [2021-11-20 06:43:23,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-20 06:43:23,793 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:43:23,793 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 06:43:23,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-20 06:43:23,794 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:43:23,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:43:23,794 INFO L85 PathProgramCache]: Analyzing trace with hash 913710270, now seen corresponding path program 1 times [2021-11-20 06:43:23,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:43:23,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352200269] [2021-11-20 06:43:23,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:43:23,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:43:23,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:23,849 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 06:43:23,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:43:23,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352200269] [2021-11-20 06:43:23,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352200269] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:43:23,850 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:43:23,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:43:23,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603033386] [2021-11-20 06:43:23,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:43:23,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:43:23,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:43:23,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:43:23,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:43:23,852 INFO L87 Difference]: Start difference. First operand 173 states and 262 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 06:43:25,860 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 06:43:26,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:43:26,232 INFO L93 Difference]: Finished difference Result 344 states and 524 transitions. [2021-11-20 06:43:26,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:43:26,233 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 06:43:26,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:43:26,235 INFO L225 Difference]: With dead ends: 344 [2021-11-20 06:43:26,235 INFO L226 Difference]: Without dead ends: 192 [2021-11-20 06:43:26,235 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 06:43:26,236 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 34 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:43:26,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 513 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 162 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 06:43:26,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-11-20 06:43:26,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 173. [2021-11-20 06:43:26,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.5174418604651163) internal successors, (261), 172 states have internal predecessors, (261), 0 states have call successors, (0), 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 06:43:26,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 261 transitions. [2021-11-20 06:43:26,247 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 261 transitions. Word has length 76 [2021-11-20 06:43:26,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:43:26,248 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 261 transitions. [2021-11-20 06:43:26,248 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 06:43:26,248 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 261 transitions. [2021-11-20 06:43:26,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-20 06:43:26,249 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:43:26,250 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 06:43:26,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-20 06:43:26,250 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:43:26,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:43:26,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1089510018, now seen corresponding path program 1 times [2021-11-20 06:43:26,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:43:26,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910231960] [2021-11-20 06:43:26,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:43:26,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:43:26,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:26,326 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 06:43:26,326 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:43:26,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910231960] [2021-11-20 06:43:26,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910231960] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:43:26,327 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:43:26,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:43:26,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059759913] [2021-11-20 06:43:26,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:43:26,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:43:26,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:43:26,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:43:26,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:43:26,329 INFO L87 Difference]: Start difference. First operand 173 states and 261 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 06:43:28,207 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:43:28,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:43:28,479 INFO L93 Difference]: Finished difference Result 342 states and 520 transitions. [2021-11-20 06:43:28,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:43:28,480 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 06:43:28,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:43:28,481 INFO L225 Difference]: With dead ends: 342 [2021-11-20 06:43:28,482 INFO L226 Difference]: Without dead ends: 190 [2021-11-20 06:43:28,482 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 06:43:28,483 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 34 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:43:28,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 517 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-20 06:43:28,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-11-20 06:43:28,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 173. [2021-11-20 06:43:28,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.5116279069767442) internal successors, (260), 172 states have internal predecessors, (260), 0 states have call successors, (0), 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 06:43:28,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 260 transitions. [2021-11-20 06:43:28,489 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 260 transitions. Word has length 76 [2021-11-20 06:43:28,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:43:28,490 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 260 transitions. [2021-11-20 06:43:28,490 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 06:43:28,490 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 260 transitions. [2021-11-20 06:43:28,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-20 06:43:28,491 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:43:28,491 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 06:43:28,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-20 06:43:28,492 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:43:28,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:43:28,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1703635249, now seen corresponding path program 1 times [2021-11-20 06:43:28,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:43:28,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473490324] [2021-11-20 06:43:28,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:43:28,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:43:28,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:28,550 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 06:43:28,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:43:28,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473490324] [2021-11-20 06:43:28,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473490324] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:43:28,551 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:43:28,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:43:28,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524938192] [2021-11-20 06:43:28,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:43:28,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:43:28,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:43:28,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:43:28,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:43:28,553 INFO L87 Difference]: Start difference. First operand 173 states and 260 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 06:43:30,562 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 06:43:30,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:43:30,896 INFO L93 Difference]: Finished difference Result 342 states and 518 transitions. [2021-11-20 06:43:30,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:43:30,897 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 06:43:30,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:43:30,899 INFO L225 Difference]: With dead ends: 342 [2021-11-20 06:43:30,899 INFO L226 Difference]: Without dead ends: 190 [2021-11-20 06:43:30,899 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 06:43:30,900 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 37 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 517 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 06:43:30,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 517 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 158 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 06:43:30,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-11-20 06:43:30,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 173. [2021-11-20 06:43:30,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.505813953488372) internal successors, (259), 172 states have internal predecessors, (259), 0 states have call successors, (0), 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 06:43:30,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 259 transitions. [2021-11-20 06:43:30,913 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 259 transitions. Word has length 77 [2021-11-20 06:43:30,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:43:30,914 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 259 transitions. [2021-11-20 06:43:30,914 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 06:43:30,915 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 259 transitions. [2021-11-20 06:43:30,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-20 06:43:30,916 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:43:30,916 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 06:43:30,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-20 06:43:30,916 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:43:30,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:43:30,918 INFO L85 PathProgramCache]: Analyzing trace with hash -618021332, now seen corresponding path program 1 times [2021-11-20 06:43:30,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:43:30,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109124760] [2021-11-20 06:43:30,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:43:30,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:43:30,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:30,980 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 06:43:30,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:43:30,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109124760] [2021-11-20 06:43:30,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109124760] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:43:30,981 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:43:30,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:43:30,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738702303] [2021-11-20 06:43:30,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:43:30,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:43:30,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:43:30,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:43:30,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:43:30,984 INFO L87 Difference]: Start difference. First operand 173 states and 259 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 06:43:32,992 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 06:43:33,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:43:33,273 INFO L93 Difference]: Finished difference Result 342 states and 516 transitions. [2021-11-20 06:43:33,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:43:33,274 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 06:43:33,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:43:33,276 INFO L225 Difference]: With dead ends: 342 [2021-11-20 06:43:33,276 INFO L226 Difference]: Without dead ends: 190 [2021-11-20 06:43:33,276 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 06:43:33,277 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 35 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 517 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 06:43:33,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 517 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 158 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 06:43:33,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-11-20 06:43:33,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 173. [2021-11-20 06:43:33,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.5) internal successors, (258), 172 states have internal predecessors, (258), 0 states have call successors, (0), 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 06:43:33,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 258 transitions. [2021-11-20 06:43:33,284 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 258 transitions. Word has length 78 [2021-11-20 06:43:33,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:43:33,285 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 258 transitions. [2021-11-20 06:43:33,285 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 06:43:33,285 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 258 transitions. [2021-11-20 06:43:33,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-20 06:43:33,286 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:43:33,286 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 06:43:33,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-20 06:43:33,287 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:43:33,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:43:33,287 INFO L85 PathProgramCache]: Analyzing trace with hash -58965580, now seen corresponding path program 1 times [2021-11-20 06:43:33,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:43:33,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762997344] [2021-11-20 06:43:33,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:43:33,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:43:33,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:33,344 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 06:43:33,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:43:33,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762997344] [2021-11-20 06:43:33,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762997344] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:43:33,344 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:43:33,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:43:33,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138327686] [2021-11-20 06:43:33,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:43:33,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:43:33,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:43:33,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:43:33,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:43:33,347 INFO L87 Difference]: Start difference. First operand 173 states and 258 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 06:43:35,355 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 06:43:35,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:43:35,616 INFO L93 Difference]: Finished difference Result 332 states and 501 transitions. [2021-11-20 06:43:35,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:43:35,616 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 06:43:35,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:43:35,618 INFO L225 Difference]: With dead ends: 332 [2021-11-20 06:43:35,618 INFO L226 Difference]: Without dead ends: 180 [2021-11-20 06:43:35,619 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 06:43:35,619 INFO L933 BasicCegarLoop]: 210 mSDtfsCounter, 26 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 531 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 06:43:35,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 531 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 144 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 06:43:35,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-11-20 06:43:35,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 173. [2021-11-20 06:43:35,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.494186046511628) internal successors, (257), 172 states have internal predecessors, (257), 0 states have call successors, (0), 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 06:43:35,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 257 transitions. [2021-11-20 06:43:35,627 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 257 transitions. Word has length 79 [2021-11-20 06:43:35,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:43:35,628 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 257 transitions. [2021-11-20 06:43:35,628 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 06:43:35,628 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 257 transitions. [2021-11-20 06:43:35,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-20 06:43:35,629 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:43:35,630 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 06:43:35,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-20 06:43:35,630 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:43:35,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:43:35,631 INFO L85 PathProgramCache]: Analyzing trace with hash -2130045715, now seen corresponding path program 1 times [2021-11-20 06:43:35,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:43:35,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633010692] [2021-11-20 06:43:35,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:43:35,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:43:35,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:35,731 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 06:43:35,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:43:35,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633010692] [2021-11-20 06:43:35,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633010692] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:43:35,732 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:43:35,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:43:35,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530226063] [2021-11-20 06:43:35,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:43:35,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:43:35,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:43:35,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:43:35,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:43:35,735 INFO L87 Difference]: Start difference. First operand 173 states and 257 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 06:43:36,938 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:43:37,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:43:37,370 INFO L93 Difference]: Finished difference Result 434 states and 658 transitions. [2021-11-20 06:43:37,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:43:37,371 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 06:43:37,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:43:37,373 INFO L225 Difference]: With dead ends: 434 [2021-11-20 06:43:37,374 INFO L226 Difference]: Without dead ends: 282 [2021-11-20 06:43:37,374 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 06:43:37,375 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 99 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:43:37,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 483 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-20 06:43:37,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-11-20 06:43:37,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 214. [2021-11-20 06:43:37,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 1.5539906103286385) internal successors, (331), 213 states have internal predecessors, (331), 0 states have call successors, (0), 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 06:43:37,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 331 transitions. [2021-11-20 06:43:37,385 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 331 transitions. Word has length 84 [2021-11-20 06:43:37,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:43:37,385 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 331 transitions. [2021-11-20 06:43:37,386 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 06:43:37,386 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 331 transitions. [2021-11-20 06:43:37,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-20 06:43:37,387 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:43:37,387 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 06:43:37,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-20 06:43:37,388 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:43:37,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:43:37,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1706398993, now seen corresponding path program 1 times [2021-11-20 06:43:37,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:43:37,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685209635] [2021-11-20 06:43:37,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:43:37,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:43:37,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:37,461 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 06:43:37,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:43:37,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685209635] [2021-11-20 06:43:37,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685209635] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:43:37,462 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:43:37,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:43:37,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364801592] [2021-11-20 06:43:37,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:43:37,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:43:37,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:43:37,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:43:37,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:43:37,465 INFO L87 Difference]: Start difference. First operand 214 states and 331 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 06:43:39,475 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 06:43:39,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:43:39,887 INFO L93 Difference]: Finished difference Result 456 states and 712 transitions. [2021-11-20 06:43:39,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:43:39,892 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 06:43:39,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:43:39,894 INFO L225 Difference]: With dead ends: 456 [2021-11-20 06:43:39,894 INFO L226 Difference]: Without dead ends: 263 [2021-11-20 06:43:39,895 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 06:43:39,896 INFO L933 BasicCegarLoop]: 253 mSDtfsCounter, 40 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 617 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 06:43:39,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 617 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 185 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 06:43:39,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-11-20 06:43:39,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 238. [2021-11-20 06:43:39,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 1.5738396624472575) internal successors, (373), 237 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:43:39,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 373 transitions. [2021-11-20 06:43:39,908 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 373 transitions. Word has length 84 [2021-11-20 06:43:39,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:43:39,909 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 373 transitions. [2021-11-20 06:43:39,909 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 06:43:39,909 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 373 transitions. [2021-11-20 06:43:39,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-20 06:43:39,911 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:43:39,911 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 06:43:39,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-20 06:43:39,911 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:43:39,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:43:39,912 INFO L85 PathProgramCache]: Analyzing trace with hash 708467242, now seen corresponding path program 1 times [2021-11-20 06:43:39,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:43:39,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247818155] [2021-11-20 06:43:39,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:43:39,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:43:39,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:40,042 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 06:43:40,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:43:40,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247818155] [2021-11-20 06:43:40,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247818155] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:43:40,043 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:43:40,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:43:40,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559891705] [2021-11-20 06:43:40,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:43:40,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:43:40,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:43:40,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:43:40,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:43:40,046 INFO L87 Difference]: Start difference. First operand 238 states and 373 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 06:43:42,055 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 06:43:42,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:43:42,491 INFO L93 Difference]: Finished difference Result 515 states and 804 transitions. [2021-11-20 06:43:42,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:43:42,492 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 06:43:42,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:43:42,494 INFO L225 Difference]: With dead ends: 515 [2021-11-20 06:43:42,494 INFO L226 Difference]: Without dead ends: 298 [2021-11-20 06:43:42,495 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 06:43:42,495 INFO L933 BasicCegarLoop]: 177 mSDtfsCounter, 88 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:43:42,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 467 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 262 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 06:43:42,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-11-20 06:43:42,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 239. [2021-11-20 06:43:42,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 1.5714285714285714) internal successors, (374), 238 states have internal predecessors, (374), 0 states have call successors, (0), 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 06:43:42,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 374 transitions. [2021-11-20 06:43:42,505 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 374 transitions. Word has length 85 [2021-11-20 06:43:42,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:43:42,506 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 374 transitions. [2021-11-20 06:43:42,506 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 06:43:42,506 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 374 transitions. [2021-11-20 06:43:42,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-20 06:43:42,507 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:43:42,508 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 06:43:42,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-20 06:43:42,508 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:43:42,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:43:42,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1994780387, now seen corresponding path program 1 times [2021-11-20 06:43:42,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:43:42,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668602784] [2021-11-20 06:43:42,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:43:42,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:43:42,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:42,583 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 06:43:42,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:43:42,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668602784] [2021-11-20 06:43:42,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668602784] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:43:42,584 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:43:42,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:43:42,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22565626] [2021-11-20 06:43:42,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:43:42,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:43:42,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:43:42,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:43:42,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:43:42,587 INFO L87 Difference]: Start difference. First operand 239 states and 374 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 06:43:44,352 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:43:44,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:43:44,754 INFO L93 Difference]: Finished difference Result 516 states and 804 transitions. [2021-11-20 06:43:44,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:43:44,755 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 06:43:44,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:43:44,757 INFO L225 Difference]: With dead ends: 516 [2021-11-20 06:43:44,757 INFO L226 Difference]: Without dead ends: 298 [2021-11-20 06:43:44,757 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 06:43:44,758 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 111 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:43:44,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 469 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-20 06:43:44,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-11-20 06:43:44,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 239. [2021-11-20 06:43:44,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 1.5672268907563025) internal successors, (373), 238 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:43:44,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 373 transitions. [2021-11-20 06:43:44,767 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 373 transitions. Word has length 97 [2021-11-20 06:43:44,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:43:44,768 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 373 transitions. [2021-11-20 06:43:44,768 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 06:43:44,768 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 373 transitions. [2021-11-20 06:43:44,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-20 06:43:44,769 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:43:44,770 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 06:43:44,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-20 06:43:44,770 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:43:44,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:43:44,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1424167903, now seen corresponding path program 1 times [2021-11-20 06:43:44,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:43:44,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706083088] [2021-11-20 06:43:44,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:43:44,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:43:44,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:44,859 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 06:43:44,860 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:43:44,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706083088] [2021-11-20 06:43:44,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706083088] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:43:44,860 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:43:44,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:43:44,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450391710] [2021-11-20 06:43:44,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:43:44,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:43:44,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:43:44,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:43:44,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:43:44,863 INFO L87 Difference]: Start difference. First operand 239 states and 373 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 06:43:45,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:43:45,909 INFO L93 Difference]: Finished difference Result 482 states and 753 transitions. [2021-11-20 06:43:45,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:43:45,909 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 06:43:45,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:43:45,911 INFO L225 Difference]: With dead ends: 482 [2021-11-20 06:43:45,912 INFO L226 Difference]: Without dead ends: 264 [2021-11-20 06:43:45,912 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 06:43:45,913 INFO L933 BasicCegarLoop]: 253 mSDtfsCounter, 47 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:43:45,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 617 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-20 06:43:45,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-11-20 06:43:45,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 239. [2021-11-20 06:43:45,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 1.5630252100840336) internal successors, (372), 238 states have internal predecessors, (372), 0 states have call successors, (0), 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 06:43:45,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 372 transitions. [2021-11-20 06:43:45,922 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 372 transitions. Word has length 97 [2021-11-20 06:43:45,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:43:45,923 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 372 transitions. [2021-11-20 06:43:45,923 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 06:43:45,923 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 372 transitions. [2021-11-20 06:43:45,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-20 06:43:45,924 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:43:45,925 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 06:43:45,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-20 06:43:45,925 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:43:45,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:43:45,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1515595446, now seen corresponding path program 1 times [2021-11-20 06:43:45,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:43:45,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129639305] [2021-11-20 06:43:45,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:43:45,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:43:45,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:46,009 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 06:43:46,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:43:46,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129639305] [2021-11-20 06:43:46,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129639305] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:43:46,010 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:43:46,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:43:46,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602140313] [2021-11-20 06:43:46,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:43:46,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:43:46,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:43:46,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:43:46,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:43:46,012 INFO L87 Difference]: Start difference. First operand 239 states and 372 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 06:43:48,023 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 06:43:48,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:43:48,414 INFO L93 Difference]: Finished difference Result 515 states and 799 transitions. [2021-11-20 06:43:48,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:43:48,414 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 06:43:48,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:43:48,416 INFO L225 Difference]: With dead ends: 515 [2021-11-20 06:43:48,417 INFO L226 Difference]: Without dead ends: 297 [2021-11-20 06:43:48,417 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 06:43:48,418 INFO L933 BasicCegarLoop]: 178 mSDtfsCounter, 115 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 467 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 06:43:48,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 467 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 261 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 06:43:48,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-11-20 06:43:48,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 239. [2021-11-20 06:43:48,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 1.5588235294117647) internal successors, (371), 238 states have internal predecessors, (371), 0 states have call successors, (0), 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 06:43:48,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 371 transitions. [2021-11-20 06:43:48,427 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 371 transitions. Word has length 98 [2021-11-20 06:43:48,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:43:48,428 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 371 transitions. [2021-11-20 06:43:48,428 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 06:43:48,428 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 371 transitions. [2021-11-20 06:43:48,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-20 06:43:48,429 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:43:48,430 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 06:43:48,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-20 06:43:48,430 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:43:48,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:43:48,431 INFO L85 PathProgramCache]: Analyzing trace with hash -892468406, now seen corresponding path program 1 times [2021-11-20 06:43:48,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:43:48,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637494530] [2021-11-20 06:43:48,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:43:48,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:43:48,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:48,528 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 06:43:48,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:43:48,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637494530] [2021-11-20 06:43:48,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637494530] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:43:48,529 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:43:48,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 06:43:48,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74388149] [2021-11-20 06:43:48,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:43:48,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:43:48,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:43:48,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:43:48,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:43:48,531 INFO L87 Difference]: Start difference. First operand 239 states and 371 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 06:43:50,541 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 06:43:52,565 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 06:43:53,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:43:53,017 INFO L93 Difference]: Finished difference Result 478 states and 747 transitions. [2021-11-20 06:43:53,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:43:53,018 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 06:43:53,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:43:53,020 INFO L225 Difference]: With dead ends: 478 [2021-11-20 06:43:53,020 INFO L226 Difference]: Without dead ends: 260 [2021-11-20 06:43:53,021 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 06:43:53,022 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 152 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 42 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:43:53,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 378 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 310 Invalid, 2 Unknown, 0 Unchecked, 4.4s Time] [2021-11-20 06:43:53,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-11-20 06:43:53,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 259. [2021-11-20 06:43:53,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 1.5387596899224807) internal successors, (397), 258 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 06:43:53,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 397 transitions. [2021-11-20 06:43:53,031 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 397 transitions. Word has length 98 [2021-11-20 06:43:53,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:43:53,032 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 397 transitions. [2021-11-20 06:43:53,032 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 06:43:53,032 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 397 transitions. [2021-11-20 06:43:53,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-20 06:43:53,033 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:43:53,034 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 06:43:53,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-20 06:43:53,034 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:43:53,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:43:53,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1744585183, now seen corresponding path program 1 times [2021-11-20 06:43:53,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:43:53,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728266075] [2021-11-20 06:43:53,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:43:53,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:43:53,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:53,105 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 06:43:53,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:43:53,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728266075] [2021-11-20 06:43:53,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728266075] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:43:53,106 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:43:53,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:43:53,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616729309] [2021-11-20 06:43:53,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:43:53,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:43:53,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:43:53,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:43:53,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:43:53,109 INFO L87 Difference]: Start difference. First operand 259 states and 397 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 06:43:54,901 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:43:55,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:43:55,320 INFO L93 Difference]: Finished difference Result 554 states and 847 transitions. [2021-11-20 06:43:55,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:43:55,321 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 06:43:55,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:43:55,323 INFO L225 Difference]: With dead ends: 554 [2021-11-20 06:43:55,323 INFO L226 Difference]: Without dead ends: 316 [2021-11-20 06:43:55,323 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 06:43:55,324 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 107 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:43:55,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 471 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-20 06:43:55,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-11-20 06:43:55,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 259. [2021-11-20 06:43:55,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 1.5348837209302326) internal successors, (396), 258 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 06:43:55,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 396 transitions. [2021-11-20 06:43:55,333 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 396 transitions. Word has length 98 [2021-11-20 06:43:55,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:43:55,333 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 396 transitions. [2021-11-20 06:43:55,334 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 06:43:55,334 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 396 transitions. [2021-11-20 06:43:55,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-20 06:43:55,335 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:43:55,335 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 06:43:55,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-20 06:43:55,336 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:43:55,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:43:55,336 INFO L85 PathProgramCache]: Analyzing trace with hash 547161825, now seen corresponding path program 1 times [2021-11-20 06:43:55,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:43:55,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778952083] [2021-11-20 06:43:55,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:43:55,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:43:55,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:55,412 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 06:43:55,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:43:55,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778952083] [2021-11-20 06:43:55,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778952083] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:43:55,413 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:43:55,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:43:55,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314600036] [2021-11-20 06:43:55,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:43:55,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:43:55,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:43:55,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:43:55,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:43:55,416 INFO L87 Difference]: Start difference. First operand 259 states and 396 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 06:43:57,075 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:43:57,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:43:57,438 INFO L93 Difference]: Finished difference Result 552 states and 843 transitions. [2021-11-20 06:43:57,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:43:57,439 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 06:43:57,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:43:57,441 INFO L225 Difference]: With dead ends: 552 [2021-11-20 06:43:57,441 INFO L226 Difference]: Without dead ends: 314 [2021-11-20 06:43:57,442 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 06:43:57,442 INFO L933 BasicCegarLoop]: 182 mSDtfsCounter, 107 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:43:57,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 475 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-20 06:43:57,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-11-20 06:43:57,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 259. [2021-11-20 06:43:57,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 1.5310077519379846) internal successors, (395), 258 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 06:43:57,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 395 transitions. [2021-11-20 06:43:57,453 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 395 transitions. Word has length 98 [2021-11-20 06:43:57,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:43:57,453 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 395 transitions. [2021-11-20 06:43:57,454 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 06:43:57,454 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 395 transitions. [2021-11-20 06:43:57,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-20 06:43:57,455 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:43:57,455 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 06:43:57,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-20 06:43:57,456 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:43:57,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:43:57,456 INFO L85 PathProgramCache]: Analyzing trace with hash -357799773, now seen corresponding path program 1 times [2021-11-20 06:43:57,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:43:57,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736509099] [2021-11-20 06:43:57,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:43:57,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:43:57,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:57,532 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 06:43:57,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:43:57,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736509099] [2021-11-20 06:43:57,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736509099] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:43:57,533 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:43:57,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:43:57,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983319942] [2021-11-20 06:43:57,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:43:57,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:43:57,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:43:57,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:43:57,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:43:57,535 INFO L87 Difference]: Start difference. First operand 259 states and 395 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 06:43:59,544 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 06:43:59,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:43:59,880 INFO L93 Difference]: Finished difference Result 520 states and 794 transitions. [2021-11-20 06:43:59,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:43:59,881 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 06:43:59,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:43:59,883 INFO L225 Difference]: With dead ends: 520 [2021-11-20 06:43:59,883 INFO L226 Difference]: Without dead ends: 282 [2021-11-20 06:43:59,884 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 06:43:59,885 INFO L933 BasicCegarLoop]: 248 mSDtfsCounter, 43 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:43:59,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 607 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 174 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 06:43:59,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-11-20 06:43:59,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 259. [2021-11-20 06:43:59,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 1.5271317829457365) internal successors, (394), 258 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 06:43:59,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 394 transitions. [2021-11-20 06:43:59,918 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 394 transitions. Word has length 98 [2021-11-20 06:43:59,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:43:59,919 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 394 transitions. [2021-11-20 06:43:59,919 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 06:43:59,919 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 394 transitions. [2021-11-20 06:43:59,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-20 06:43:59,920 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:43:59,921 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 06:43:59,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-20 06:43:59,921 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:43:59,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:43:59,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1933947235, now seen corresponding path program 1 times [2021-11-20 06:43:59,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:43:59,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583583885] [2021-11-20 06:43:59,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:43:59,923 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:43:59,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:44:00,005 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 06:44:00,005 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:44:00,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583583885] [2021-11-20 06:44:00,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583583885] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:44:00,006 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:44:00,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:44:00,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399723631] [2021-11-20 06:44:00,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:44:00,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:44:00,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:44:00,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:44:00,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:44:00,009 INFO L87 Difference]: Start difference. First operand 259 states and 394 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 06:44:02,018 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 06:44:02,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:44:02,348 INFO L93 Difference]: Finished difference Result 518 states and 790 transitions. [2021-11-20 06:44:02,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:44:02,349 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 06:44:02,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:44:02,350 INFO L225 Difference]: With dead ends: 518 [2021-11-20 06:44:02,350 INFO L226 Difference]: Without dead ends: 280 [2021-11-20 06:44:02,351 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 06:44:02,351 INFO L933 BasicCegarLoop]: 250 mSDtfsCounter, 43 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:44:02,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 611 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 170 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 06:44:02,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-11-20 06:44:02,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 259. [2021-11-20 06:44:02,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 1.5232558139534884) internal successors, (393), 258 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 06:44:02,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 393 transitions. [2021-11-20 06:44:02,363 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 393 transitions. Word has length 98 [2021-11-20 06:44:02,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:44:02,363 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 393 transitions. [2021-11-20 06:44:02,363 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 06:44:02,364 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 393 transitions. [2021-11-20 06:44:02,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-20 06:44:02,365 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:44:02,365 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 06:44:02,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-11-20 06:44:02,366 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:44:02,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:44:02,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1844056193, now seen corresponding path program 1 times [2021-11-20 06:44:02,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:44:02,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595324781] [2021-11-20 06:44:02,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:44:02,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:44:02,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:44:02,439 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 06:44:02,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:44:02,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595324781] [2021-11-20 06:44:02,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595324781] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:44:02,440 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:44:02,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:44:02,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458299941] [2021-11-20 06:44:02,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:44:02,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:44:02,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:44:02,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:44:02,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:44:02,442 INFO L87 Difference]: Start difference. First operand 259 states and 393 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 06:44:04,059 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:44:04,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:44:04,484 INFO L93 Difference]: Finished difference Result 552 states and 837 transitions. [2021-11-20 06:44:04,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:44:04,485 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 06:44:04,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:44:04,488 INFO L225 Difference]: With dead ends: 552 [2021-11-20 06:44:04,488 INFO L226 Difference]: Without dead ends: 314 [2021-11-20 06:44:04,488 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 06:44:04,489 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 111 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:44:04,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 499 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-20 06:44:04,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-11-20 06:44:04,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 259. [2021-11-20 06:44:04,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 1.5193798449612403) internal successors, (392), 258 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 06:44:04,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 392 transitions. [2021-11-20 06:44:04,501 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 392 transitions. Word has length 99 [2021-11-20 06:44:04,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:44:04,502 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 392 transitions. [2021-11-20 06:44:04,502 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 06:44:04,502 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 392 transitions. [2021-11-20 06:44:04,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-20 06:44:04,504 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:44:04,504 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 06:44:04,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-11-20 06:44:04,504 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:44:04,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:44:04,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1803381443, now seen corresponding path program 1 times [2021-11-20 06:44:04,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:44:04,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064569845] [2021-11-20 06:44:04,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:44:04,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:44:04,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:44:04,607 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 06:44:04,608 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:44:04,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064569845] [2021-11-20 06:44:04,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064569845] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:44:04,608 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:44:04,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:44:04,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968428350] [2021-11-20 06:44:04,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:44:04,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:44:04,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:44:04,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:44:04,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:44:04,609 INFO L87 Difference]: Start difference. First operand 259 states and 392 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 06:44:05,695 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 06:44:06,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:44:06,066 INFO L93 Difference]: Finished difference Result 518 states and 786 transitions. [2021-11-20 06:44:06,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:44:06,066 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 06:44:06,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:44:06,068 INFO L225 Difference]: With dead ends: 518 [2021-11-20 06:44:06,068 INFO L226 Difference]: Without dead ends: 280 [2021-11-20 06:44:06,069 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 06:44:06,070 INFO L933 BasicCegarLoop]: 249 mSDtfsCounter, 47 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 609 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:44:06,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 609 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-20 06:44:06,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-11-20 06:44:06,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 259. [2021-11-20 06:44:06,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 1.5155038759689923) internal successors, (391), 258 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 06:44:06,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 391 transitions. [2021-11-20 06:44:06,080 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 391 transitions. Word has length 99 [2021-11-20 06:44:06,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:44:06,081 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 391 transitions. [2021-11-20 06:44:06,081 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 06:44:06,081 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 391 transitions. [2021-11-20 06:44:06,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-20 06:44:06,083 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:44:06,083 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 06:44:06,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-11-20 06:44:06,083 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:44:06,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:44:06,084 INFO L85 PathProgramCache]: Analyzing trace with hash -336813763, now seen corresponding path program 1 times [2021-11-20 06:44:06,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:44:06,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952172662] [2021-11-20 06:44:06,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:44:06,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:44:06,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:44:06,168 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 06:44:06,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:44:06,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952172662] [2021-11-20 06:44:06,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952172662] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:44:06,169 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:44:06,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:44:06,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228208175] [2021-11-20 06:44:06,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:44:06,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:44:06,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:44:06,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:44:06,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:44:06,172 INFO L87 Difference]: Start difference. First operand 259 states and 391 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 06:44:08,179 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:44:08,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:44:08,633 INFO L93 Difference]: Finished difference Result 552 states and 833 transitions. [2021-11-20 06:44:08,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:44:08,634 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 06:44:08,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:44:08,636 INFO L225 Difference]: With dead ends: 552 [2021-11-20 06:44:08,636 INFO L226 Difference]: Without dead ends: 314 [2021-11-20 06:44:08,636 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 06:44:08,637 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 109 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:44:08,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 499 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 06:44:08,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-11-20 06:44:08,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 259. [2021-11-20 06:44:08,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 1.5116279069767442) internal successors, (390), 258 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 06:44:08,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 390 transitions. [2021-11-20 06:44:08,648 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 390 transitions. Word has length 100 [2021-11-20 06:44:08,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:44:08,649 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 390 transitions. [2021-11-20 06:44:08,649 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 06:44:08,649 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 390 transitions. [2021-11-20 06:44:08,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-20 06:44:08,651 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:44:08,651 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 06:44:08,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-11-20 06:44:08,651 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:44:08,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:44:08,652 INFO L85 PathProgramCache]: Analyzing trace with hash 924103487, now seen corresponding path program 1 times [2021-11-20 06:44:08,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:44:08,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399838150] [2021-11-20 06:44:08,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:44:08,653 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:44:08,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:44:08,724 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 06:44:08,724 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:44:08,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399838150] [2021-11-20 06:44:08,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399838150] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:44:08,725 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:44:08,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:44:08,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209038028] [2021-11-20 06:44:08,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:44:08,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:44:08,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:44:08,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:44:08,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:44:08,727 INFO L87 Difference]: Start difference. First operand 259 states and 390 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 06:44:10,736 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 06:44:11,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:44:11,094 INFO L93 Difference]: Finished difference Result 518 states and 782 transitions. [2021-11-20 06:44:11,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:44:11,094 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 06:44:11,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:44:11,096 INFO L225 Difference]: With dead ends: 518 [2021-11-20 06:44:11,097 INFO L226 Difference]: Without dead ends: 280 [2021-11-20 06:44:11,097 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 06:44:11,098 INFO L933 BasicCegarLoop]: 248 mSDtfsCounter, 45 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:44:11,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 607 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 170 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 06:44:11,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-11-20 06:44:11,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 259. [2021-11-20 06:44:11,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 1.5077519379844961) internal successors, (389), 258 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:44:11,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 389 transitions. [2021-11-20 06:44:11,121 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 389 transitions. Word has length 100 [2021-11-20 06:44:11,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:44:11,122 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 389 transitions. [2021-11-20 06:44:11,122 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 06:44:11,122 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 389 transitions. [2021-11-20 06:44:11,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-20 06:44:11,123 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:44:11,124 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 06:44:11,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-11-20 06:44:11,124 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:44:11,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:44:11,125 INFO L85 PathProgramCache]: Analyzing trace with hash -304000870, now seen corresponding path program 1 times [2021-11-20 06:44:11,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:44:11,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905612994] [2021-11-20 06:44:11,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:44:11,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:44:11,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:44:11,198 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 06:44:11,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:44:11,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905612994] [2021-11-20 06:44:11,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905612994] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:44:11,199 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:44:11,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:44:11,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59402379] [2021-11-20 06:44:11,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:44:11,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:44:11,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:44:11,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:44:11,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:44:11,201 INFO L87 Difference]: Start difference. First operand 259 states and 389 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 06:44:13,212 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 06:44:13,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:44:13,601 INFO L93 Difference]: Finished difference Result 552 states and 829 transitions. [2021-11-20 06:44:13,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:44:13,602 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 06:44:13,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:44:13,604 INFO L225 Difference]: With dead ends: 552 [2021-11-20 06:44:13,604 INFO L226 Difference]: Without dead ends: 314 [2021-11-20 06:44:13,605 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 06:44:13,606 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 107 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:44:13,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 499 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 254 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 06:44:13,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-11-20 06:44:13,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 259. [2021-11-20 06:44:13,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 1.503875968992248) internal successors, (388), 258 states have internal predecessors, (388), 0 states have call successors, (0), 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 06:44:13,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 388 transitions. [2021-11-20 06:44:13,616 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 388 transitions. Word has length 101 [2021-11-20 06:44:13,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:44:13,616 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 388 transitions. [2021-11-20 06:44:13,617 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 06:44:13,617 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 388 transitions. [2021-11-20 06:44:13,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-20 06:44:13,618 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:44:13,618 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 06:44:13,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-11-20 06:44:13,619 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:44:13,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:44:13,619 INFO L85 PathProgramCache]: Analyzing trace with hash 129728216, now seen corresponding path program 1 times [2021-11-20 06:44:13,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:44:13,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777534077] [2021-11-20 06:44:13,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:44:13,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:44:13,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:44:13,690 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 06:44:13,691 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:44:13,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777534077] [2021-11-20 06:44:13,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777534077] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:44:13,691 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:44:13,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:44:13,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516386565] [2021-11-20 06:44:13,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:44:13,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:44:13,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:44:13,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:44:13,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:44:13,694 INFO L87 Difference]: Start difference. First operand 259 states and 388 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 06:44:15,702 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 06:44:15,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:44:15,970 INFO L93 Difference]: Finished difference Result 518 states and 778 transitions. [2021-11-20 06:44:15,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:44:15,971 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 06:44:15,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:44:15,972 INFO L225 Difference]: With dead ends: 518 [2021-11-20 06:44:15,973 INFO L226 Difference]: Without dead ends: 280 [2021-11-20 06:44:15,973 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 06:44:15,974 INFO L933 BasicCegarLoop]: 247 mSDtfsCounter, 43 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 605 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:44:15,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 605 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 170 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 06:44:15,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-11-20 06:44:15,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 259. [2021-11-20 06:44:15,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 1.5) internal successors, (387), 258 states have internal predecessors, (387), 0 states have call successors, (0), 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 06:44:15,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 387 transitions. [2021-11-20 06:44:15,983 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 387 transitions. Word has length 101 [2021-11-20 06:44:15,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:44:15,983 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 387 transitions. [2021-11-20 06:44:15,983 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 06:44:15,984 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 387 transitions. [2021-11-20 06:44:15,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-20 06:44:15,985 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:44:15,985 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 06:44:15,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-11-20 06:44:15,985 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:44:15,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:44:15,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1266136632, now seen corresponding path program 1 times [2021-11-20 06:44:15,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:44:15,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979026913] [2021-11-20 06:44:15,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:44:15,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:44:16,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:44:16,070 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 06:44:16,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:44:16,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979026913] [2021-11-20 06:44:16,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979026913] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:44:16,071 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:44:16,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:44:16,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884831307] [2021-11-20 06:44:16,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:44:16,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:44:16,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:44:16,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:44:16,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:44:16,077 INFO L87 Difference]: Start difference. First operand 259 states and 387 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 06:44:18,034 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:44:18,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:44:18,455 INFO L93 Difference]: Finished difference Result 542 states and 813 transitions. [2021-11-20 06:44:18,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:44:18,456 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 06:44:18,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:44:18,457 INFO L225 Difference]: With dead ends: 542 [2021-11-20 06:44:18,457 INFO L226 Difference]: Without dead ends: 304 [2021-11-20 06:44:18,458 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 06:44:18,458 INFO L933 BasicCegarLoop]: 188 mSDtfsCounter, 98 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:44:18,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 487 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 06:44:18,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-11-20 06:44:18,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 259. [2021-11-20 06:44:18,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 1.496124031007752) internal successors, (386), 258 states have internal predecessors, (386), 0 states have call successors, (0), 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 06:44:18,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 386 transitions. [2021-11-20 06:44:18,467 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 386 transitions. Word has length 102 [2021-11-20 06:44:18,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:44:18,468 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 386 transitions. [2021-11-20 06:44:18,468 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 06:44:18,468 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 386 transitions. [2021-11-20 06:44:18,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-20 06:44:18,469 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:44:18,470 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 06:44:18,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-11-20 06:44:18,470 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:44:18,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:44:18,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1826836410, now seen corresponding path program 1 times [2021-11-20 06:44:18,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:44:18,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596013247] [2021-11-20 06:44:18,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:44:18,471 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:44:18,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:44:18,531 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 06:44:18,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:44:18,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596013247] [2021-11-20 06:44:18,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596013247] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:44:18,532 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:44:18,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:44:18,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840976744] [2021-11-20 06:44:18,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:44:18,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:44:18,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:44:18,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:44:18,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:44:18,535 INFO L87 Difference]: Start difference. First operand 259 states and 386 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 06:44:20,544 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 06:44:20,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:44:20,799 INFO L93 Difference]: Finished difference Result 508 states and 762 transitions. [2021-11-20 06:44:20,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:44:20,799 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 06:44:20,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:44:20,800 INFO L225 Difference]: With dead ends: 508 [2021-11-20 06:44:20,801 INFO L226 Difference]: Without dead ends: 270 [2021-11-20 06:44:20,801 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 06:44:20,802 INFO L933 BasicCegarLoop]: 240 mSDtfsCounter, 34 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:44:20,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 591 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 157 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-11-20 06:44:20,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-11-20 06:44:20,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 259. [2021-11-20 06:44:20,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 1.4922480620155039) internal successors, (385), 258 states have internal predecessors, (385), 0 states have call successors, (0), 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 06:44:20,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 385 transitions. [2021-11-20 06:44:20,811 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 385 transitions. Word has length 102 [2021-11-20 06:44:20,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:44:20,812 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 385 transitions. [2021-11-20 06:44:20,812 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 06:44:20,812 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 385 transitions. [2021-11-20 06:44:20,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-20 06:44:20,813 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:44:20,813 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 06:44:20,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-11-20 06:44:20,814 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:44:20,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:44:20,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1512912580, now seen corresponding path program 1 times [2021-11-20 06:44:20,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:44:20,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783906506] [2021-11-20 06:44:20,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:44:20,815 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:44:20,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:44:20,877 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 06:44:20,877 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:44:20,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783906506] [2021-11-20 06:44:20,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783906506] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:44:20,878 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:44:20,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:44:20,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258063273] [2021-11-20 06:44:20,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:44:20,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:44:20,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:44:20,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:44:20,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:44:20,880 INFO L87 Difference]: Start difference. First operand 259 states and 385 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 06:44:22,398 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:44:22,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:44:22,710 INFO L93 Difference]: Finished difference Result 542 states and 809 transitions. [2021-11-20 06:44:22,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:44:22,711 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 06:44:22,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:44:22,713 INFO L225 Difference]: With dead ends: 542 [2021-11-20 06:44:22,713 INFO L226 Difference]: Without dead ends: 304 [2021-11-20 06:44:22,714 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 06:44:22,714 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 88 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-20 06:44:22,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 499 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-20 06:44:22,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-11-20 06:44:22,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 259. [2021-11-20 06:44:22,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 1.4883720930232558) internal successors, (384), 258 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:44:22,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 384 transitions. [2021-11-20 06:44:22,724 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 384 transitions. Word has length 106 [2021-11-20 06:44:22,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:44:22,724 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 384 transitions. [2021-11-20 06:44:22,724 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 06:44:22,724 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 384 transitions. [2021-11-20 06:44:22,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-20 06:44:22,725 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:44:22,726 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 06:44:22,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-11-20 06:44:22,726 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:44:22,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:44:22,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1095515974, now seen corresponding path program 1 times [2021-11-20 06:44:22,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:44:22,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479061576] [2021-11-20 06:44:22,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:44:22,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:44:22,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:44:22,789 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 06:44:22,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:44:22,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479061576] [2021-11-20 06:44:22,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479061576] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:44:22,790 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:44:22,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:44:22,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322658323] [2021-11-20 06:44:22,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:44:22,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:44:22,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:44:22,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:44:22,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:44:22,792 INFO L87 Difference]: Start difference. First operand 259 states and 384 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 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 06:44:24,800 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 06:44:25,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:44:25,056 INFO L93 Difference]: Finished difference Result 549 states and 822 transitions. [2021-11-20 06:44:25,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:44:25,056 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 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 06:44:25,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:44:25,057 INFO L225 Difference]: With dead ends: 549 [2021-11-20 06:44:25,058 INFO L226 Difference]: Without dead ends: 311 [2021-11-20 06:44:25,058 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 06:44:25,058 INFO L933 BasicCegarLoop]: 232 mSDtfsCounter, 42 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:44:25,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 575 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 187 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-11-20 06:44:25,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-11-20 06:44:25,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 285. [2021-11-20 06:44:25,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 1.5105633802816902) internal successors, (429), 284 states have internal predecessors, (429), 0 states have call successors, (0), 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 06:44:25,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 429 transitions. [2021-11-20 06:44:25,067 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 429 transitions. Word has length 106 [2021-11-20 06:44:25,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:44:25,068 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 429 transitions. [2021-11-20 06:44:25,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 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 06:44:25,068 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 429 transitions. [2021-11-20 06:44:25,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-20 06:44:25,069 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:44:25,069 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-11-20 06:44:25,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-11-20 06:44:25,070 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:44:25,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:44:25,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1067005946, now seen corresponding path program 1 times [2021-11-20 06:44:25,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:44:25,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231107809] [2021-11-20 06:44:25,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:44:25,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:44:25,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:44:25,141 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 06:44:25,141 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:44:25,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231107809] [2021-11-20 06:44:25,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231107809] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:44:25,142 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:44:25,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:44:25,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197003552] [2021-11-20 06:44:25,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:44:25,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:44:25,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:44:25,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:44:25,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:44:25,144 INFO L87 Difference]: Start difference. First operand 285 states and 429 transitions. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 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 06:44:27,152 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 06:44:27,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:44:27,503 INFO L93 Difference]: Finished difference Result 594 states and 897 transitions. [2021-11-20 06:44:27,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:44:27,503 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 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 109 [2021-11-20 06:44:27,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:44:27,505 INFO L225 Difference]: With dead ends: 594 [2021-11-20 06:44:27,506 INFO L226 Difference]: Without dead ends: 330 [2021-11-20 06:44:27,506 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 06:44:27,508 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 83 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:44:27,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 499 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 241 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 06:44:27,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-11-20 06:44:27,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 285. [2021-11-20 06:44:27,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 1.5070422535211268) internal successors, (428), 284 states have internal predecessors, (428), 0 states have call successors, (0), 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 06:44:27,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 428 transitions. [2021-11-20 06:44:27,520 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 428 transitions. Word has length 109 [2021-11-20 06:44:27,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:44:27,520 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 428 transitions. [2021-11-20 06:44:27,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 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 06:44:27,520 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 428 transitions. [2021-11-20 06:44:27,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-20 06:44:27,521 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:44:27,522 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-11-20 06:44:27,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-11-20 06:44:27,523 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:44:27,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:44:27,524 INFO L85 PathProgramCache]: Analyzing trace with hash 687660868, now seen corresponding path program 1 times [2021-11-20 06:44:27,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:44:27,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874087358] [2021-11-20 06:44:27,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:44:27,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:44:27,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:44:27,622 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 06:44:27,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:44:27,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874087358] [2021-11-20 06:44:27,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874087358] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:44:27,623 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:44:27,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:44:27,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648408895] [2021-11-20 06:44:27,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:44:27,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:44:27,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:44:27,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:44:27,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:44:27,628 INFO L87 Difference]: Start difference. First operand 285 states and 428 transitions. Second operand has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 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 06:44:29,606 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:44:29,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:44:29,897 INFO L93 Difference]: Finished difference Result 586 states and 882 transitions. [2021-11-20 06:44:29,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:44:29,898 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 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 110 [2021-11-20 06:44:29,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:44:29,899 INFO L225 Difference]: With dead ends: 586 [2021-11-20 06:44:29,899 INFO L226 Difference]: Without dead ends: 322 [2021-11-20 06:44:29,900 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 06:44:29,900 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 72 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:44:29,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 517 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 06:44:29,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-11-20 06:44:29,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 285. [2021-11-20 06:44:29,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 1.5035211267605635) internal successors, (427), 284 states have internal predecessors, (427), 0 states have call successors, (0), 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 06:44:29,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 427 transitions. [2021-11-20 06:44:29,921 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 427 transitions. Word has length 110 [2021-11-20 06:44:29,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:44:29,922 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 427 transitions. [2021-11-20 06:44:29,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 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 06:44:29,922 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 427 transitions. [2021-11-20 06:44:29,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-20 06:44:29,923 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:44:29,923 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2021-11-20 06:44:29,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-11-20 06:44:29,924 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:44:29,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:44:29,924 INFO L85 PathProgramCache]: Analyzing trace with hash 494521728, now seen corresponding path program 1 times [2021-11-20 06:44:29,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:44:29,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870634229] [2021-11-20 06:44:29,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:44:29,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:44:29,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:44:29,990 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 06:44:29,990 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:44:29,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870634229] [2021-11-20 06:44:29,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870634229] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:44:29,990 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:44:29,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:44:29,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160681395] [2021-11-20 06:44:29,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:44:29,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:44:29,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:44:29,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:44:29,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:44:29,992 INFO L87 Difference]: Start difference. First operand 285 states and 427 transitions. Second operand has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 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 06:44:31,219 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:44:31,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:44:31,505 INFO L93 Difference]: Finished difference Result 586 states and 880 transitions. [2021-11-20 06:44:31,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:44:31,505 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 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 111 [2021-11-20 06:44:31,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:44:31,507 INFO L225 Difference]: With dead ends: 586 [2021-11-20 06:44:31,507 INFO L226 Difference]: Without dead ends: 322 [2021-11-20 06:44:31,508 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 06:44:31,509 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 70 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:44:31,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 517 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-20 06:44:31,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-11-20 06:44:31,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 285. [2021-11-20 06:44:31,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 1.5) internal successors, (426), 284 states have internal predecessors, (426), 0 states have call successors, (0), 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 06:44:31,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 426 transitions. [2021-11-20 06:44:31,519 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 426 transitions. Word has length 111 [2021-11-20 06:44:31,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:44:31,519 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 426 transitions. [2021-11-20 06:44:31,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 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 06:44:31,519 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 426 transitions. [2021-11-20 06:44:31,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-20 06:44:31,520 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:44:31,521 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1] [2021-11-20 06:44:31,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-11-20 06:44:31,521 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:44:31,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:44:31,522 INFO L85 PathProgramCache]: Analyzing trace with hash 935880089, now seen corresponding path program 1 times [2021-11-20 06:44:31,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:44:31,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677502149] [2021-11-20 06:44:31,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:44:31,522 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:44:31,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:44:31,609 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 06:44:31,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:44:31,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677502149] [2021-11-20 06:44:31,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677502149] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:44:31,610 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:44:31,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:44:31,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863194183] [2021-11-20 06:44:31,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:44:31,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:44:31,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:44:31,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:44:31,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:44:31,611 INFO L87 Difference]: Start difference. First operand 285 states and 426 transitions. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 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 06:44:33,622 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 06:44:33,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:44:33,903 INFO L93 Difference]: Finished difference Result 586 states and 878 transitions. [2021-11-20 06:44:33,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:44:33,903 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 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 112 [2021-11-20 06:44:33,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:44:33,910 INFO L225 Difference]: With dead ends: 586 [2021-11-20 06:44:33,910 INFO L226 Difference]: Without dead ends: 322 [2021-11-20 06:44:33,910 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 06:44:33,911 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 73 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:44:33,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 517 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 223 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 06:44:33,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-11-20 06:44:33,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 285. [2021-11-20 06:44:33,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 1.4964788732394365) internal successors, (425), 284 states have internal predecessors, (425), 0 states have call successors, (0), 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 06:44:33,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 425 transitions. [2021-11-20 06:44:33,923 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 425 transitions. Word has length 112 [2021-11-20 06:44:33,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:44:33,925 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 425 transitions. [2021-11-20 06:44:33,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 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 06:44:33,926 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 425 transitions. [2021-11-20 06:44:33,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-20 06:44:33,927 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:44:33,927 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2021-11-20 06:44:33,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-11-20 06:44:33,927 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:44:33,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:44:33,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1479032990, now seen corresponding path program 1 times [2021-11-20 06:44:33,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:44:33,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140665692] [2021-11-20 06:44:33,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:44:33,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:44:33,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:44:34,020 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 06:44:34,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:44:34,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140665692] [2021-11-20 06:44:34,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140665692] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:44:34,021 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:44:34,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:44:34,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703946406] [2021-11-20 06:44:34,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:44:34,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:44:34,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:44:34,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:44:34,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:44:34,022 INFO L87 Difference]: Start difference. First operand 285 states and 425 transitions. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 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 06:44:36,034 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 06:44:36,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:44:36,313 INFO L93 Difference]: Finished difference Result 584 states and 874 transitions. [2021-11-20 06:44:36,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:44:36,314 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 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 112 [2021-11-20 06:44:36,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:44:36,316 INFO L225 Difference]: With dead ends: 584 [2021-11-20 06:44:36,316 INFO L226 Difference]: Without dead ends: 320 [2021-11-20 06:44:36,316 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 06:44:36,317 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 66 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:44:36,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 519 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 221 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 06:44:36,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-11-20 06:44:36,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 285. [2021-11-20 06:44:36,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 1.4929577464788732) internal successors, (424), 284 states have internal predecessors, (424), 0 states have call successors, (0), 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 06:44:36,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 424 transitions. [2021-11-20 06:44:36,327 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 424 transitions. Word has length 112 [2021-11-20 06:44:36,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:44:36,327 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 424 transitions. [2021-11-20 06:44:36,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 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 06:44:36,328 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 424 transitions. [2021-11-20 06:44:36,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-20 06:44:36,329 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:44:36,329 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1] [2021-11-20 06:44:36,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-11-20 06:44:36,330 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:44:36,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:44:36,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1703513339, now seen corresponding path program 1 times [2021-11-20 06:44:36,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:44:36,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882000553] [2021-11-20 06:44:36,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:44:36,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:44:36,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:44:36,395 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 06:44:36,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:44:36,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882000553] [2021-11-20 06:44:36,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882000553] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:44:36,396 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:44:36,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:44:36,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425436843] [2021-11-20 06:44:36,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:44:36,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:44:36,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:44:36,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:44:36,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:44:36,398 INFO L87 Difference]: Start difference. First operand 285 states and 424 transitions. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 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 06:44:37,820 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:44:38,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:44:38,090 INFO L93 Difference]: Finished difference Result 582 states and 869 transitions. [2021-11-20 06:44:38,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:44:38,091 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 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 113 [2021-11-20 06:44:38,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:44:38,093 INFO L225 Difference]: With dead ends: 582 [2021-11-20 06:44:38,093 INFO L226 Difference]: Without dead ends: 318 [2021-11-20 06:44:38,094 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 06:44:38,094 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 68 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:44:38,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 525 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-20 06:44:38,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-11-20 06:44:38,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 285. [2021-11-20 06:44:38,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 1.4894366197183098) internal successors, (423), 284 states have internal predecessors, (423), 0 states have call successors, (0), 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 06:44:38,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 423 transitions. [2021-11-20 06:44:38,105 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 423 transitions. Word has length 113 [2021-11-20 06:44:38,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:44:38,105 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 423 transitions. [2021-11-20 06:44:38,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 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 06:44:38,106 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 423 transitions. [2021-11-20 06:44:38,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-20 06:44:38,107 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:44:38,107 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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] [2021-11-20 06:44:38,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-11-20 06:44:38,108 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:44:38,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:44:38,108 INFO L85 PathProgramCache]: Analyzing trace with hash -825612738, now seen corresponding path program 1 times [2021-11-20 06:44:38,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:44:38,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157621985] [2021-11-20 06:44:38,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:44:38,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:44:38,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:44:38,171 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 06:44:38,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:44:38,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157621985] [2021-11-20 06:44:38,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157621985] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:44:38,171 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:44:38,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:44:38,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793536556] [2021-11-20 06:44:38,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:44:38,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:44:38,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:44:38,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:44:38,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:44:38,173 INFO L87 Difference]: Start difference. First operand 285 states and 423 transitions. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 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 06:44:40,181 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 06:44:40,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:44:40,446 INFO L93 Difference]: Finished difference Result 579 states and 863 transitions. [2021-11-20 06:44:40,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:44:40,447 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 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 113 [2021-11-20 06:44:40,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:44:40,449 INFO L225 Difference]: With dead ends: 579 [2021-11-20 06:44:40,449 INFO L226 Difference]: Without dead ends: 315 [2021-11-20 06:44:40,450 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 06:44:40,450 INFO L933 BasicCegarLoop]: 209 mSDtfsCounter, 61 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:44:40,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 531 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 209 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 06:44:40,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-11-20 06:44:40,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 285. [2021-11-20 06:44:40,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 1.4859154929577465) internal successors, (422), 284 states have internal predecessors, (422), 0 states have call successors, (0), 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 06:44:40,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 422 transitions. [2021-11-20 06:44:40,461 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 422 transitions. Word has length 113 [2021-11-20 06:44:40,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:44:40,461 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 422 transitions. [2021-11-20 06:44:40,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 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 06:44:40,462 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 422 transitions. [2021-11-20 06:44:40,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-20 06:44:40,463 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:44:40,463 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2021-11-20 06:44:40,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-11-20 06:44:40,463 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:44:40,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:44:40,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1790573921, now seen corresponding path program 1 times [2021-11-20 06:44:40,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:44:40,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962554942] [2021-11-20 06:44:40,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:44:40,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:44:40,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:44:40,527 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 06:44:40,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:44:40,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962554942] [2021-11-20 06:44:40,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962554942] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:44:40,528 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:44:40,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:44:40,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229475698] [2021-11-20 06:44:40,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:44:40,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:44:40,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:44:40,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:44:40,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:44:40,530 INFO L87 Difference]: Start difference. First operand 285 states and 422 transitions. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 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 06:44:41,611 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 06:44:41,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:44:41,895 INFO L93 Difference]: Finished difference Result 579 states and 861 transitions. [2021-11-20 06:44:41,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:44:41,896 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 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 115 [2021-11-20 06:44:41,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:44:41,898 INFO L225 Difference]: With dead ends: 579 [2021-11-20 06:44:41,898 INFO L226 Difference]: Without dead ends: 315 [2021-11-20 06:44:41,899 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 06:44:41,899 INFO L933 BasicCegarLoop]: 209 mSDtfsCounter, 59 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:44:41,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 531 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-20 06:44:41,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-11-20 06:44:41,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 285. [2021-11-20 06:44:41,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 1.482394366197183) internal successors, (421), 284 states have internal predecessors, (421), 0 states have call successors, (0), 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 06:44:41,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 421 transitions. [2021-11-20 06:44:41,909 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 421 transitions. Word has length 115 [2021-11-20 06:44:41,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:44:41,910 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 421 transitions. [2021-11-20 06:44:41,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 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 06:44:41,910 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 421 transitions. [2021-11-20 06:44:41,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-20 06:44:41,910 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:44:41,911 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2021-11-20 06:44:41,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-11-20 06:44:41,911 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:44:41,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:44:41,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1832041442, now seen corresponding path program 1 times [2021-11-20 06:44:41,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:44:41,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122594172] [2021-11-20 06:44:41,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:44:41,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:44:41,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:44:41,974 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 06:44:41,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:44:41,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122594172] [2021-11-20 06:44:41,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122594172] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:44:41,975 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:44:41,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:44:41,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817854685] [2021-11-20 06:44:41,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:44:41,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:44:41,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:44:41,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:44:41,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:44:41,976 INFO L87 Difference]: Start difference. First operand 285 states and 421 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 06:44:43,989 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 06:44:44,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:44:44,251 INFO L93 Difference]: Finished difference Result 575 states and 854 transitions. [2021-11-20 06:44:44,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:44:44,251 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 116 [2021-11-20 06:44:44,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:44:44,258 INFO L225 Difference]: With dead ends: 575 [2021-11-20 06:44:44,258 INFO L226 Difference]: Without dead ends: 311 [2021-11-20 06:44:44,259 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 06:44:44,260 INFO L933 BasicCegarLoop]: 211 mSDtfsCounter, 54 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:44:44,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 535 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 205 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 06:44:44,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-11-20 06:44:44,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 285. [2021-11-20 06:44:44,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 1.4788732394366197) internal successors, (420), 284 states have internal predecessors, (420), 0 states have call successors, (0), 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 06:44:44,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 420 transitions. [2021-11-20 06:44:44,271 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 420 transitions. Word has length 116 [2021-11-20 06:44:44,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:44:44,271 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 420 transitions. [2021-11-20 06:44:44,271 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 06:44:44,272 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 420 transitions. [2021-11-20 06:44:44,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-20 06:44:44,273 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:44:44,273 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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] [2021-11-20 06:44:44,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-11-20 06:44:44,273 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:44:44,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:44:44,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1941566892, now seen corresponding path program 1 times [2021-11-20 06:44:44,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:44:44,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938406808] [2021-11-20 06:44:44,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:44:44,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:44:44,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:44:44,337 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 06:44:44,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:44:44,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938406808] [2021-11-20 06:44:44,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938406808] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:44:44,338 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:44:44,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:44:44,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538901241] [2021-11-20 06:44:44,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:44:44,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:44:44,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:44:44,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:44:44,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:44:44,340 INFO L87 Difference]: Start difference. First operand 285 states and 420 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 06:44:45,964 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 06:44:46,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:44:46,224 INFO L93 Difference]: Finished difference Result 575 states and 852 transitions. [2021-11-20 06:44:46,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:44:46,225 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 116 [2021-11-20 06:44:46,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:44:46,227 INFO L225 Difference]: With dead ends: 575 [2021-11-20 06:44:46,227 INFO L226 Difference]: Without dead ends: 311 [2021-11-20 06:44:46,228 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 06:44:46,229 INFO L933 BasicCegarLoop]: 211 mSDtfsCounter, 52 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-20 06:44:46,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 535 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-20 06:44:46,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-11-20 06:44:46,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 285. [2021-11-20 06:44:46,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 1.4753521126760563) internal successors, (419), 284 states have internal predecessors, (419), 0 states have call successors, (0), 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 06:44:46,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 419 transitions. [2021-11-20 06:44:46,241 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 419 transitions. Word has length 116 [2021-11-20 06:44:46,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:44:46,241 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 419 transitions. [2021-11-20 06:44:46,241 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 06:44:46,242 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 419 transitions. [2021-11-20 06:44:46,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-20 06:44:46,243 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:44:46,243 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2021-11-20 06:44:46,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-11-20 06:44:46,244 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:44:46,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:44:46,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1362210001, now seen corresponding path program 1 times [2021-11-20 06:44:46,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:44:46,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85553624] [2021-11-20 06:44:46,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:44:46,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:44:46,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:44:46,319 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 06:44:46,320 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:44:46,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85553624] [2021-11-20 06:44:46,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85553624] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:44:46,320 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:44:46,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:44:46,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233116221] [2021-11-20 06:44:46,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:44:46,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:44:46,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:44:46,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:44:46,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:44:46,322 INFO L87 Difference]: Start difference. First operand 285 states and 419 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 06:44:48,331 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 06:44:48,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:44:48,591 INFO L93 Difference]: Finished difference Result 573 states and 848 transitions. [2021-11-20 06:44:48,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:44:48,592 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 117 [2021-11-20 06:44:48,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:44:48,593 INFO L225 Difference]: With dead ends: 573 [2021-11-20 06:44:48,593 INFO L226 Difference]: Without dead ends: 309 [2021-11-20 06:44:48,594 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 06:44:48,594 INFO L933 BasicCegarLoop]: 212 mSDtfsCounter, 49 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:44:48,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 537 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 203 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 06:44:48,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-11-20 06:44:48,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 285. [2021-11-20 06:44:48,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 1.471830985915493) internal successors, (418), 284 states have internal predecessors, (418), 0 states have call successors, (0), 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 06:44:48,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 418 transitions. [2021-11-20 06:44:48,605 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 418 transitions. Word has length 117 [2021-11-20 06:44:48,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:44:48,606 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 418 transitions. [2021-11-20 06:44:48,606 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 06:44:48,606 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 418 transitions. [2021-11-20 06:44:48,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-20 06:44:48,607 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:44:48,607 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2021-11-20 06:44:48,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-11-20 06:44:48,608 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:44:48,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:44:48,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1998117201, now seen corresponding path program 1 times [2021-11-20 06:44:48,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:44:48,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584200584] [2021-11-20 06:44:48,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:44:48,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:44:48,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:44:48,673 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 06:44:48,674 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:44:48,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584200584] [2021-11-20 06:44:48,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584200584] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:44:48,674 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:44:48,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:44:48,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057067083] [2021-11-20 06:44:48,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:44:48,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:44:48,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:44:48,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:44:48,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:44:48,676 INFO L87 Difference]: Start difference. First operand 285 states and 418 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 06:44:49,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:44:49,674 INFO L93 Difference]: Finished difference Result 573 states and 846 transitions. [2021-11-20 06:44:49,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:44:49,674 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 118 [2021-11-20 06:44:49,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:44:49,676 INFO L225 Difference]: With dead ends: 573 [2021-11-20 06:44:49,676 INFO L226 Difference]: Without dead ends: 309 [2021-11-20 06:44:49,677 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 06:44:49,677 INFO L933 BasicCegarLoop]: 212 mSDtfsCounter, 47 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:44:49,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 537 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-20 06:44:49,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-11-20 06:44:49,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 285. [2021-11-20 06:44:49,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 1.4683098591549295) internal successors, (417), 284 states have internal predecessors, (417), 0 states have call successors, (0), 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 06:44:49,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 417 transitions. [2021-11-20 06:44:49,686 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 417 transitions. Word has length 118 [2021-11-20 06:44:49,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:44:49,687 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 417 transitions. [2021-11-20 06:44:49,687 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 06:44:49,687 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 417 transitions. [2021-11-20 06:44:49,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-20 06:44:49,688 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:44:49,688 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2021-11-20 06:44:49,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-11-20 06:44:49,689 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:44:49,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:44:49,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1622495564, now seen corresponding path program 1 times [2021-11-20 06:44:49,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:44:49,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461839699] [2021-11-20 06:44:49,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:44:49,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:44:49,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:44:49,763 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 06:44:49,764 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:44:49,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461839699] [2021-11-20 06:44:49,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461839699] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:44:49,764 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:44:49,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:44:49,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447963527] [2021-11-20 06:44:49,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:44:49,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:44:49,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:44:49,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:44:49,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:44:49,766 INFO L87 Difference]: Start difference. First operand 285 states and 417 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 06:44:50,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:44:50,505 INFO L93 Difference]: Finished difference Result 571 states and 842 transitions. [2021-11-20 06:44:50,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:44:50,506 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 119 [2021-11-20 06:44:50,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:44:50,508 INFO L225 Difference]: With dead ends: 571 [2021-11-20 06:44:50,508 INFO L226 Difference]: Without dead ends: 307 [2021-11-20 06:44:50,509 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 06:44:50,509 INFO L933 BasicCegarLoop]: 213 mSDtfsCounter, 44 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:44:50,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 539 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-20 06:44:50,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-11-20 06:44:50,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 285. [2021-11-20 06:44:50,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 1.4647887323943662) internal successors, (416), 284 states have internal predecessors, (416), 0 states have call successors, (0), 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 06:44:50,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 416 transitions. [2021-11-20 06:44:50,521 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 416 transitions. Word has length 119 [2021-11-20 06:44:50,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:44:50,521 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 416 transitions. [2021-11-20 06:44:50,521 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 06:44:50,522 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 416 transitions. [2021-11-20 06:44:50,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-20 06:44:50,523 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:44:50,523 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 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] [2021-11-20 06:44:50,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-11-20 06:44:50,523 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:44:50,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:44:50,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1693246166, now seen corresponding path program 1 times [2021-11-20 06:44:50,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:44:50,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339728576] [2021-11-20 06:44:50,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:44:50,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:44:50,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:44:50,594 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-11-20 06:44:50,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:44:50,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339728576] [2021-11-20 06:44:50,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339728576] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:44:50,595 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:44:50,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:44:50,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459457106] [2021-11-20 06:44:50,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:44:50,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:44:50,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:44:50,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:44:50,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:44:50,597 INFO L87 Difference]: Start difference. First operand 285 states and 416 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 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 06:44:52,408 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:44:52,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:44:52,762 INFO L93 Difference]: Finished difference Result 620 states and 917 transitions. [2021-11-20 06:44:52,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:44:52,763 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 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 119 [2021-11-20 06:44:52,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:44:52,765 INFO L225 Difference]: With dead ends: 620 [2021-11-20 06:44:52,765 INFO L226 Difference]: Without dead ends: 356 [2021-11-20 06:44:52,766 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 06:44:52,766 INFO L933 BasicCegarLoop]: 239 mSDtfsCounter, 59 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 590 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:44:52,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 590 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-20 06:44:52,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-11-20 06:44:52,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 317. [2021-11-20 06:44:52,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 1.4968354430379747) internal successors, (473), 316 states have internal predecessors, (473), 0 states have call successors, (0), 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 06:44:52,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 473 transitions. [2021-11-20 06:44:52,779 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 473 transitions. Word has length 119 [2021-11-20 06:44:52,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:44:52,779 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 473 transitions. [2021-11-20 06:44:52,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 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 06:44:52,780 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 473 transitions. [2021-11-20 06:44:52,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-20 06:44:52,781 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:44:52,781 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 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 06:44:52,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-11-20 06:44:52,781 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:44:52,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:44:52,782 INFO L85 PathProgramCache]: Analyzing trace with hash -109291334, now seen corresponding path program 1 times [2021-11-20 06:44:52,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:44:52,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293800208] [2021-11-20 06:44:52,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:44:52,783 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:44:52,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:44:52,868 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-20 06:44:52,868 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:44:52,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293800208] [2021-11-20 06:44:52,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293800208] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:44:52,869 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:44:52,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:44:52,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516826291] [2021-11-20 06:44:52,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:44:52,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:44:52,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:44:52,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:44:52,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:44:52,870 INFO L87 Difference]: Start difference. First operand 317 states and 473 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 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 06:44:54,879 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 06:44:55,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:44:55,261 INFO L93 Difference]: Finished difference Result 719 states and 1085 transitions. [2021-11-20 06:44:55,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:44:55,262 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 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 120 [2021-11-20 06:44:55,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:44:55,264 INFO L225 Difference]: With dead ends: 719 [2021-11-20 06:44:55,264 INFO L226 Difference]: Without dead ends: 423 [2021-11-20 06:44:55,264 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 06:44:55,265 INFO L933 BasicCegarLoop]: 283 mSDtfsCounter, 98 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 677 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:44:55,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 677 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 278 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 06:44:55,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-11-20 06:44:55,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 356. [2021-11-20 06:44:55,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 1.532394366197183) internal successors, (544), 355 states have internal predecessors, (544), 0 states have call successors, (0), 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 06:44:55,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 544 transitions. [2021-11-20 06:44:55,279 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 544 transitions. Word has length 120 [2021-11-20 06:44:55,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:44:55,279 INFO L470 AbstractCegarLoop]: Abstraction has 356 states and 544 transitions. [2021-11-20 06:44:55,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 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 06:44:55,280 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 544 transitions. [2021-11-20 06:44:55,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-20 06:44:55,281 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:44:55,281 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-11-20 06:44:55,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-11-20 06:44:55,281 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:44:55,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:44:55,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1605412870, now seen corresponding path program 1 times [2021-11-20 06:44:55,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:44:55,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217471600] [2021-11-20 06:44:55,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:44:55,283 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:44:55,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:44:55,350 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-20 06:44:55,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:44:55,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217471600] [2021-11-20 06:44:55,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217471600] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:44:55,351 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:44:55,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:44:55,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780635674] [2021-11-20 06:44:55,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:44:55,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:44:55,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:44:55,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:44:55,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:44:55,353 INFO L87 Difference]: Start difference. First operand 356 states and 544 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 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 06:44:57,361 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 06:44:57,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:44:57,626 INFO L93 Difference]: Finished difference Result 717 states and 1096 transitions. [2021-11-20 06:44:57,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:44:57,627 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 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 121 [2021-11-20 06:44:57,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:44:57,628 INFO L225 Difference]: With dead ends: 717 [2021-11-20 06:44:57,628 INFO L226 Difference]: Without dead ends: 382 [2021-11-20 06:44:57,629 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 06:44:57,629 INFO L933 BasicCegarLoop]: 229 mSDtfsCounter, 55 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:44:57,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 569 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 183 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-11-20 06:44:57,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-11-20 06:44:57,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 356. [2021-11-20 06:44:57,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 1.5295774647887324) internal successors, (543), 355 states have internal predecessors, (543), 0 states have call successors, (0), 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 06:44:57,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 543 transitions. [2021-11-20 06:44:57,641 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 543 transitions. Word has length 121 [2021-11-20 06:44:57,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:44:57,641 INFO L470 AbstractCegarLoop]: Abstraction has 356 states and 543 transitions. [2021-11-20 06:44:57,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 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 06:44:57,642 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 543 transitions. [2021-11-20 06:44:57,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-20 06:44:57,643 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:44:57,643 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 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] [2021-11-20 06:44:57,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-11-20 06:44:57,643 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:44:57,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:44:57,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1072656387, now seen corresponding path program 1 times [2021-11-20 06:44:57,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:44:57,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035396914] [2021-11-20 06:44:57,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:44:57,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:44:57,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:44:57,706 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-20 06:44:57,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:44:57,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035396914] [2021-11-20 06:44:57,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035396914] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:44:57,707 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:44:57,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:44:57,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860463679] [2021-11-20 06:44:57,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:44:57,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:44:57,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:44:57,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:44:57,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:44:57,709 INFO L87 Difference]: Start difference. First operand 356 states and 543 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 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 06:44:59,729 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 06:45:00,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:45:00,075 INFO L93 Difference]: Finished difference Result 750 states and 1142 transitions. [2021-11-20 06:45:00,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:45:00,076 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 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 121 [2021-11-20 06:45:00,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:45:00,078 INFO L225 Difference]: With dead ends: 750 [2021-11-20 06:45:00,078 INFO L226 Difference]: Without dead ends: 415 [2021-11-20 06:45:00,079 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 06:45:00,079 INFO L933 BasicCegarLoop]: 275 mSDtfsCounter, 87 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 661 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:45:00,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 661 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 271 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 06:45:00,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-11-20 06:45:00,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 355. [2021-11-20 06:45:00,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 1.5310734463276836) internal successors, (542), 354 states have internal predecessors, (542), 0 states have call successors, (0), 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 06:45:00,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 542 transitions. [2021-11-20 06:45:00,092 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 542 transitions. Word has length 121 [2021-11-20 06:45:00,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:45:00,092 INFO L470 AbstractCegarLoop]: Abstraction has 355 states and 542 transitions. [2021-11-20 06:45:00,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 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 06:45:00,093 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 542 transitions. [2021-11-20 06:45:00,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-20 06:45:00,094 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:45:00,094 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-11-20 06:45:00,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-11-20 06:45:00,094 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:45:00,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:45:00,095 INFO L85 PathProgramCache]: Analyzing trace with hash -777455210, now seen corresponding path program 1 times [2021-11-20 06:45:00,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:45:00,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171299466] [2021-11-20 06:45:00,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:45:00,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:45:00,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:45:00,157 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-20 06:45:00,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:45:00,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171299466] [2021-11-20 06:45:00,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171299466] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:45:00,158 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:45:00,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:45:00,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679772928] [2021-11-20 06:45:00,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:45:00,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:45:00,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:45:00,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:45:00,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:45:00,160 INFO L87 Difference]: Start difference. First operand 355 states and 542 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 06:45:01,371 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:45:01,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:45:01,597 INFO L93 Difference]: Finished difference Result 715 states and 1092 transitions. [2021-11-20 06:45:01,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:45:01,597 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 122 [2021-11-20 06:45:01,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:45:01,599 INFO L225 Difference]: With dead ends: 715 [2021-11-20 06:45:01,599 INFO L226 Difference]: Without dead ends: 381 [2021-11-20 06:45:01,600 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 06:45:01,604 INFO L933 BasicCegarLoop]: 229 mSDtfsCounter, 53 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:45:01,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 569 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-20 06:45:01,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-11-20 06:45:01,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 355. [2021-11-20 06:45:01,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 1.5282485875706215) internal successors, (541), 354 states have internal predecessors, (541), 0 states have call successors, (0), 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 06:45:01,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 541 transitions. [2021-11-20 06:45:01,613 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 541 transitions. Word has length 122 [2021-11-20 06:45:01,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:45:01,614 INFO L470 AbstractCegarLoop]: Abstraction has 355 states and 541 transitions. [2021-11-20 06:45:01,614 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 06:45:01,614 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 541 transitions. [2021-11-20 06:45:01,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-20 06:45:01,614 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:45:01,615 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-11-20 06:45:01,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-11-20 06:45:01,615 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:45:01,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:45:01,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1078983839, now seen corresponding path program 1 times [2021-11-20 06:45:01,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:45:01,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44091538] [2021-11-20 06:45:01,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:45:01,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:45:01,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:45:01,678 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-20 06:45:01,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:45:01,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44091538] [2021-11-20 06:45:01,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44091538] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:45:01,679 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:45:01,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:45:01,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411970363] [2021-11-20 06:45:01,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:45:01,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:45:01,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:45:01,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:45:01,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:45:01,681 INFO L87 Difference]: Start difference. First operand 355 states and 541 transitions. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 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 06:45:02,868 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:45:03,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:45:03,105 INFO L93 Difference]: Finished difference Result 715 states and 1090 transitions. [2021-11-20 06:45:03,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:45:03,106 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 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 123 [2021-11-20 06:45:03,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:45:03,107 INFO L225 Difference]: With dead ends: 715 [2021-11-20 06:45:03,107 INFO L226 Difference]: Without dead ends: 381 [2021-11-20 06:45:03,108 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 06:45:03,108 INFO L933 BasicCegarLoop]: 229 mSDtfsCounter, 51 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:45:03,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 569 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-20 06:45:03,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-11-20 06:45:03,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 355. [2021-11-20 06:45:03,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 1.5254237288135593) internal successors, (540), 354 states have internal predecessors, (540), 0 states have call successors, (0), 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 06:45:03,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 540 transitions. [2021-11-20 06:45:03,117 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 540 transitions. Word has length 123 [2021-11-20 06:45:03,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:45:03,117 INFO L470 AbstractCegarLoop]: Abstraction has 355 states and 540 transitions. [2021-11-20 06:45:03,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 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 06:45:03,118 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 540 transitions. [2021-11-20 06:45:03,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-20 06:45:03,119 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:45:03,119 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 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] [2021-11-20 06:45:03,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-11-20 06:45:03,119 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:45:03,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:45:03,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1283498927, now seen corresponding path program 1 times [2021-11-20 06:45:03,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:45:03,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48986628] [2021-11-20 06:45:03,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:45:03,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:45:03,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:45:03,181 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-20 06:45:03,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:45:03,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48986628] [2021-11-20 06:45:03,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48986628] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:45:03,181 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:45:03,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:45:03,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57366228] [2021-11-20 06:45:03,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:45:03,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:45:03,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:45:03,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:45:03,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:45:03,183 INFO L87 Difference]: Start difference. First operand 355 states and 540 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 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 06:45:04,616 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:45:04,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:45:04,843 INFO L93 Difference]: Finished difference Result 705 states and 1076 transitions. [2021-11-20 06:45:04,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:45:04,844 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 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 124 [2021-11-20 06:45:04,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:45:04,845 INFO L225 Difference]: With dead ends: 705 [2021-11-20 06:45:04,845 INFO L226 Difference]: Without dead ends: 371 [2021-11-20 06:45:04,846 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 06:45:04,846 INFO L933 BasicCegarLoop]: 235 mSDtfsCounter, 42 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:45:04,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 581 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-20 06:45:04,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-11-20 06:45:04,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 355. [2021-11-20 06:45:04,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 1.5225988700564972) internal successors, (539), 354 states have internal predecessors, (539), 0 states have call successors, (0), 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 06:45:04,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 539 transitions. [2021-11-20 06:45:04,858 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 539 transitions. Word has length 124 [2021-11-20 06:45:04,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:45:04,859 INFO L470 AbstractCegarLoop]: Abstraction has 355 states and 539 transitions. [2021-11-20 06:45:04,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 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 06:45:04,859 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 539 transitions. [2021-11-20 06:45:04,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-20 06:45:04,860 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:45:04,861 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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] [2021-11-20 06:45:04,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-11-20 06:45:04,861 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:45:04,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:45:04,861 INFO L85 PathProgramCache]: Analyzing trace with hash 898054256, now seen corresponding path program 1 times [2021-11-20 06:45:04,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:45:04,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915758702] [2021-11-20 06:45:04,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:45:04,862 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:45:04,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:45:04,926 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-20 06:45:04,927 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:45:04,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915758702] [2021-11-20 06:45:04,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915758702] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:45:04,927 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:45:04,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:45:04,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202445061] [2021-11-20 06:45:04,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:45:04,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:45:04,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:45:04,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:45:04,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:45:04,929 INFO L87 Difference]: Start difference. First operand 355 states and 539 transitions. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 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 06:45:06,936 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 06:45:07,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:45:07,283 INFO L93 Difference]: Finished difference Result 795 states and 1217 transitions. [2021-11-20 06:45:07,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:45:07,284 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 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 125 [2021-11-20 06:45:07,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:45:07,286 INFO L225 Difference]: With dead ends: 795 [2021-11-20 06:45:07,286 INFO L226 Difference]: Without dead ends: 461 [2021-11-20 06:45:07,286 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 06:45:07,287 INFO L933 BasicCegarLoop]: 288 mSDtfsCounter, 98 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 10 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 686 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:45:07,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 686 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 281 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 06:45:07,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-11-20 06:45:07,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 394. [2021-11-20 06:45:07,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 1.5521628498727735) internal successors, (610), 393 states have internal predecessors, (610), 0 states have call successors, (0), 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 06:45:07,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 610 transitions. [2021-11-20 06:45:07,301 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 610 transitions. Word has length 125 [2021-11-20 06:45:07,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:45:07,301 INFO L470 AbstractCegarLoop]: Abstraction has 394 states and 610 transitions. [2021-11-20 06:45:07,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 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 06:45:07,302 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 610 transitions. [2021-11-20 06:45:07,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-20 06:45:07,303 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:45:07,303 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2021-11-20 06:45:07,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2021-11-20 06:45:07,303 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:45:07,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:45:07,304 INFO L85 PathProgramCache]: Analyzing trace with hash 90285831, now seen corresponding path program 1 times [2021-11-20 06:45:07,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:45:07,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596524854] [2021-11-20 06:45:07,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:45:07,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:45:07,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:45:07,364 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-20 06:45:07,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:45:07,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596524854] [2021-11-20 06:45:07,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596524854] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:45:07,364 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:45:07,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:45:07,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227532124] [2021-11-20 06:45:07,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:45:07,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:45:07,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:45:07,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:45:07,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:45:07,366 INFO L87 Difference]: Start difference. First operand 394 states and 610 transitions. Second operand has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 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 06:45:08,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:45:08,466 INFO L93 Difference]: Finished difference Result 826 states and 1276 transitions. [2021-11-20 06:45:08,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:45:08,467 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 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 126 [2021-11-20 06:45:08,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:45:08,469 INFO L225 Difference]: With dead ends: 826 [2021-11-20 06:45:08,469 INFO L226 Difference]: Without dead ends: 453 [2021-11-20 06:45:08,469 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 06:45:08,469 INFO L933 BasicCegarLoop]: 291 mSDtfsCounter, 87 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 692 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:45:08,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 692 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-20 06:45:08,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-11-20 06:45:08,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 355. [2021-11-20 06:45:08,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 1.5225988700564972) internal successors, (539), 354 states have internal predecessors, (539), 0 states have call successors, (0), 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 06:45:08,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 539 transitions. [2021-11-20 06:45:08,482 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 539 transitions. Word has length 126 [2021-11-20 06:45:08,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:45:08,482 INFO L470 AbstractCegarLoop]: Abstraction has 355 states and 539 transitions. [2021-11-20 06:45:08,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 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 06:45:08,483 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 539 transitions. [2021-11-20 06:45:08,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-20 06:45:08,484 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:45:08,484 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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] [2021-11-20 06:45:08,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2021-11-20 06:45:08,484 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:45:08,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:45:08,485 INFO L85 PathProgramCache]: Analyzing trace with hash 734680572, now seen corresponding path program 1 times [2021-11-20 06:45:08,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:45:08,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037349386] [2021-11-20 06:45:08,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:45:08,486 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:45:08,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:45:08,565 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 06:45:08,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:45:08,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037349386] [2021-11-20 06:45:08,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037349386] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:45:08,565 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:45:08,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:45:08,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078252022] [2021-11-20 06:45:08,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:45:08,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:45:08,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:45:08,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:45:08,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:45:08,567 INFO L87 Difference]: Start difference. First operand 355 states and 539 transitions. Second operand has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 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 06:45:10,237 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:45:10,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:45:10,484 INFO L93 Difference]: Finished difference Result 704 states and 1073 transitions. [2021-11-20 06:45:10,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:45:10,484 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 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 127 [2021-11-20 06:45:10,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:45:10,486 INFO L225 Difference]: With dead ends: 704 [2021-11-20 06:45:10,486 INFO L226 Difference]: Without dead ends: 370 [2021-11-20 06:45:10,486 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 06:45:10,486 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 26 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-20 06:45:10,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 545 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-20 06:45:10,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-11-20 06:45:10,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 358. [2021-11-20 06:45:10,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 1.5182072829131652) internal successors, (542), 357 states have internal predecessors, (542), 0 states have call successors, (0), 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 06:45:10,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 542 transitions. [2021-11-20 06:45:10,495 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 542 transitions. Word has length 127 [2021-11-20 06:45:10,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:45:10,495 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 542 transitions. [2021-11-20 06:45:10,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 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 06:45:10,496 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 542 transitions. [2021-11-20 06:45:10,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-20 06:45:10,497 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:45:10,497 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 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] [2021-11-20 06:45:10,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2021-11-20 06:45:10,497 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:45:10,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:45:10,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1402848674, now seen corresponding path program 1 times [2021-11-20 06:45:10,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:45:10,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206916205] [2021-11-20 06:45:10,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:45:10,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:45:10,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:45:10,557 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-20 06:45:10,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:45:10,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206916205] [2021-11-20 06:45:10,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206916205] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:45:10,558 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:45:10,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:45:10,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379249739] [2021-11-20 06:45:10,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:45:10,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:45:10,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:45:10,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:45:10,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:45:10,560 INFO L87 Difference]: Start difference. First operand 358 states and 542 transitions. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 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 06:45:12,183 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 06:45:12,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:45:12,405 INFO L93 Difference]: Finished difference Result 711 states and 1080 transitions. [2021-11-20 06:45:12,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:45:12,405 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 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 134 [2021-11-20 06:45:12,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:45:12,407 INFO L225 Difference]: With dead ends: 711 [2021-11-20 06:45:12,407 INFO L226 Difference]: Without dead ends: 374 [2021-11-20 06:45:12,407 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 06:45:12,407 INFO L933 BasicCegarLoop]: 235 mSDtfsCounter, 40 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-20 06:45:12,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 581 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-20 06:45:12,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-11-20 06:45:12,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 358. [2021-11-20 06:45:12,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 1.515406162464986) internal successors, (541), 357 states have internal predecessors, (541), 0 states have call successors, (0), 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 06:45:12,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 541 transitions. [2021-11-20 06:45:12,421 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 541 transitions. Word has length 134 [2021-11-20 06:45:12,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:45:12,421 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 541 transitions. [2021-11-20 06:45:12,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 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 06:45:12,422 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 541 transitions. [2021-11-20 06:45:12,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-20 06:45:12,423 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:45:12,423 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] [2021-11-20 06:45:12,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2021-11-20 06:45:12,423 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:45:12,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:45:12,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1498284146, now seen corresponding path program 1 times [2021-11-20 06:45:12,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:45:12,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420904729] [2021-11-20 06:45:12,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:45:12,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:45:12,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:45:12,486 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 06:45:12,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:45:12,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420904729] [2021-11-20 06:45:12,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420904729] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:45:12,487 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:45:12,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:45:12,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742752095] [2021-11-20 06:45:12,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:45:12,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:45:12,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:45:12,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:45:12,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:45:12,488 INFO L87 Difference]: Start difference. First operand 358 states and 541 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 06:45:14,504 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 06:45:14,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:45:14,791 INFO L93 Difference]: Finished difference Result 757 states and 1153 transitions. [2021-11-20 06:45:14,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:45:14,791 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 134 [2021-11-20 06:45:14,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:45:14,793 INFO L225 Difference]: With dead ends: 757 [2021-11-20 06:45:14,793 INFO L226 Difference]: Without dead ends: 420 [2021-11-20 06:45:14,794 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 06:45:14,794 INFO L933 BasicCegarLoop]: 260 mSDtfsCounter, 53 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 631 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:45:14,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 631 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 217 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 06:45:14,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-11-20 06:45:14,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 386. [2021-11-20 06:45:14,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 1.5324675324675325) internal successors, (590), 385 states have internal predecessors, (590), 0 states have call successors, (0), 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 06:45:14,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 590 transitions. [2021-11-20 06:45:14,804 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 590 transitions. Word has length 134 [2021-11-20 06:45:14,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:45:14,804 INFO L470 AbstractCegarLoop]: Abstraction has 386 states and 590 transitions. [2021-11-20 06:45:14,804 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 06:45:14,804 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 590 transitions. [2021-11-20 06:45:14,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-20 06:45:14,805 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:45:14,805 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 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] [2021-11-20 06:45:14,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2021-11-20 06:45:14,806 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:45:14,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:45:14,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1237059566, now seen corresponding path program 1 times [2021-11-20 06:45:14,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:45:14,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299619341] [2021-11-20 06:45:14,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:45:14,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:45:14,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:45:14,864 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 92 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-20 06:45:14,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:45:14,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299619341] [2021-11-20 06:45:14,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299619341] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:45:14,865 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:45:14,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:45:14,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595893390] [2021-11-20 06:45:14,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:45:14,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:45:14,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:45:14,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:45:14,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:45:14,866 INFO L87 Difference]: Start difference. First operand 386 states and 590 transitions. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 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 06:45:16,875 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 06:45:17,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:45:17,201 INFO L93 Difference]: Finished difference Result 849 states and 1306 transitions. [2021-11-20 06:45:17,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:45:17,201 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 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 135 [2021-11-20 06:45:17,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:45:17,203 INFO L225 Difference]: With dead ends: 849 [2021-11-20 06:45:17,203 INFO L226 Difference]: Without dead ends: 484 [2021-11-20 06:45:17,204 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 06:45:17,204 INFO L933 BasicCegarLoop]: 229 mSDtfsCounter, 114 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:45:17,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 569 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 264 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 06:45:17,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-11-20 06:45:17,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 398. [2021-11-20 06:45:17,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 1.5289672544080604) internal successors, (607), 397 states have internal predecessors, (607), 0 states have call successors, (0), 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 06:45:17,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 607 transitions. [2021-11-20 06:45:17,214 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 607 transitions. Word has length 135 [2021-11-20 06:45:17,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:45:17,214 INFO L470 AbstractCegarLoop]: Abstraction has 398 states and 607 transitions. [2021-11-20 06:45:17,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 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 06:45:17,214 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 607 transitions. [2021-11-20 06:45:17,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-20 06:45:17,215 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:45:17,215 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 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] [2021-11-20 06:45:17,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2021-11-20 06:45:17,215 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:45:17,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:45:17,216 INFO L85 PathProgramCache]: Analyzing trace with hash -61335726, now seen corresponding path program 1 times [2021-11-20 06:45:17,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:45:17,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315594945] [2021-11-20 06:45:17,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:45:17,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:45:17,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:45:17,293 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-20 06:45:17,293 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:45:17,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315594945] [2021-11-20 06:45:17,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315594945] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:45:17,294 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:45:17,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:45:17,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102337034] [2021-11-20 06:45:17,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:45:17,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:45:17,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:45:17,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:45:17,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:45:17,296 INFO L87 Difference]: Start difference. First operand 398 states and 607 transitions. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 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 06:45:18,471 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:45:18,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:45:18,684 INFO L93 Difference]: Finished difference Result 789 states and 1208 transitions. [2021-11-20 06:45:18,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:45:18,684 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 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 135 [2021-11-20 06:45:18,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:45:18,686 INFO L225 Difference]: With dead ends: 789 [2021-11-20 06:45:18,686 INFO L226 Difference]: Without dead ends: 412 [2021-11-20 06:45:18,686 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 06:45:18,687 INFO L933 BasicCegarLoop]: 237 mSDtfsCounter, 38 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 585 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:45:18,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 585 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-20 06:45:18,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-11-20 06:45:18,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 398. [2021-11-20 06:45:18,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 1.526448362720403) internal successors, (606), 397 states have internal predecessors, (606), 0 states have call successors, (0), 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 06:45:18,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 606 transitions. [2021-11-20 06:45:18,701 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 606 transitions. Word has length 135 [2021-11-20 06:45:18,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:45:18,701 INFO L470 AbstractCegarLoop]: Abstraction has 398 states and 606 transitions. [2021-11-20 06:45:18,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 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 06:45:18,702 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 606 transitions. [2021-11-20 06:45:18,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-20 06:45:18,703 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:45:18,703 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 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] [2021-11-20 06:45:18,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2021-11-20 06:45:18,704 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:45:18,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:45:18,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1300212490, now seen corresponding path program 1 times [2021-11-20 06:45:18,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:45:18,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879075938] [2021-11-20 06:45:18,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:45:18,705 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:45:18,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:45:18,770 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-20 06:45:18,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:45:18,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879075938] [2021-11-20 06:45:18,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879075938] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:45:18,771 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:45:18,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:45:18,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226659939] [2021-11-20 06:45:18,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:45:18,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:45:18,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:45:18,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:45:18,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:45:18,773 INFO L87 Difference]: Start difference. First operand 398 states and 606 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 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 06:45:20,563 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:45:20,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:45:20,918 INFO L93 Difference]: Finished difference Result 861 states and 1320 transitions. [2021-11-20 06:45:20,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:45:20,918 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 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 136 [2021-11-20 06:45:20,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:45:20,920 INFO L225 Difference]: With dead ends: 861 [2021-11-20 06:45:20,920 INFO L226 Difference]: Without dead ends: 484 [2021-11-20 06:45:20,921 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 06:45:20,921 INFO L933 BasicCegarLoop]: 214 mSDtfsCounter, 112 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:45:20,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 539 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-20 06:45:20,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-11-20 06:45:20,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 399. [2021-11-20 06:45:20,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 1.5251256281407035) internal successors, (607), 398 states have internal predecessors, (607), 0 states have call successors, (0), 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 06:45:20,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 607 transitions. [2021-11-20 06:45:20,931 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 607 transitions. Word has length 136 [2021-11-20 06:45:20,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:45:20,932 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 607 transitions. [2021-11-20 06:45:20,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 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 06:45:20,932 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 607 transitions. [2021-11-20 06:45:20,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-20 06:45:20,933 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:45:20,933 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 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] [2021-11-20 06:45:20,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2021-11-20 06:45:20,934 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:45:20,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:45:20,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1095794579, now seen corresponding path program 1 times [2021-11-20 06:45:20,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:45:20,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893133309] [2021-11-20 06:45:20,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:45:20,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:45:20,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:45:21,020 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-20 06:45:21,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:45:21,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893133309] [2021-11-20 06:45:21,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893133309] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:45:21,021 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:45:21,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:45:21,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857412860] [2021-11-20 06:45:21,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:45:21,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:45:21,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:45:21,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:45:21,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:45:21,022 INFO L87 Difference]: Start difference. First operand 399 states and 607 transitions. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 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 06:45:23,038 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 06:45:23,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:45:23,348 INFO L93 Difference]: Finished difference Result 862 states and 1320 transitions. [2021-11-20 06:45:23,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:45:23,348 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 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 06:45:23,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:45:23,350 INFO L225 Difference]: With dead ends: 862 [2021-11-20 06:45:23,350 INFO L226 Difference]: Without dead ends: 484 [2021-11-20 06:45:23,351 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 06:45:23,356 INFO L933 BasicCegarLoop]: 214 mSDtfsCounter, 110 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:45:23,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 539 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 262 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 06:45:23,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-11-20 06:45:23,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 400. [2021-11-20 06:45:23,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 1.5238095238095237) internal successors, (608), 399 states have internal predecessors, (608), 0 states have call successors, (0), 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 06:45:23,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 608 transitions. [2021-11-20 06:45:23,366 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 608 transitions. Word has length 137 [2021-11-20 06:45:23,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:45:23,367 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 608 transitions. [2021-11-20 06:45:23,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 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 06:45:23,367 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 608 transitions. [2021-11-20 06:45:23,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-20 06:45:23,367 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:45:23,368 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 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] [2021-11-20 06:45:23,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2021-11-20 06:45:23,368 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:45:23,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:45:23,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1804631867, now seen corresponding path program 1 times [2021-11-20 06:45:23,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:45:23,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382544910] [2021-11-20 06:45:23,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:45:23,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:45:23,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:45:23,434 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-20 06:45:23,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:45:23,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382544910] [2021-11-20 06:45:23,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382544910] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:45:23,435 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:45:23,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:45:23,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263413783] [2021-11-20 06:45:23,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:45:23,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:45:23,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:45:23,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:45:23,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:45:23,436 INFO L87 Difference]: Start difference. First operand 400 states and 608 transitions. Second operand has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 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 06:45:25,038 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:45:25,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:45:25,333 INFO L93 Difference]: Finished difference Result 853 states and 1308 transitions. [2021-11-20 06:45:25,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:45:25,333 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 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 138 [2021-11-20 06:45:25,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:45:25,335 INFO L225 Difference]: With dead ends: 853 [2021-11-20 06:45:25,335 INFO L226 Difference]: Without dead ends: 474 [2021-11-20 06:45:25,336 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 06:45:25,336 INFO L933 BasicCegarLoop]: 220 mSDtfsCounter, 101 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-20 06:45:25,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 551 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-20 06:45:25,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-11-20 06:45:25,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 401. [2021-11-20 06:45:25,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 1.5225) internal successors, (609), 400 states have internal predecessors, (609), 0 states have call successors, (0), 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 06:45:25,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 609 transitions. [2021-11-20 06:45:25,354 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 609 transitions. Word has length 138 [2021-11-20 06:45:25,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:45:25,354 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 609 transitions. [2021-11-20 06:45:25,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 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 06:45:25,354 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 609 transitions. [2021-11-20 06:45:25,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-20 06:45:25,355 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:45:25,355 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2021-11-20 06:45:25,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2021-11-20 06:45:25,355 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:45:25,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:45:25,356 INFO L85 PathProgramCache]: Analyzing trace with hash 317912476, now seen corresponding path program 1 times [2021-11-20 06:45:25,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:45:25,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557952210] [2021-11-20 06:45:25,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:45:25,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:45:25,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:45:25,412 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-20 06:45:25,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:45:25,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557952210] [2021-11-20 06:45:25,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557952210] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:45:25,413 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:45:25,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:45:25,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118648646] [2021-11-20 06:45:25,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:45:25,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:45:25,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:45:25,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:45:25,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:45:25,415 INFO L87 Difference]: Start difference. First operand 401 states and 609 transitions. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 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 06:45:27,423 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 06:45:27,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:45:27,786 INFO L93 Difference]: Finished difference Result 864 states and 1320 transitions. [2021-11-20 06:45:27,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:45:27,787 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 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 140 [2021-11-20 06:45:27,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:45:27,789 INFO L225 Difference]: With dead ends: 864 [2021-11-20 06:45:27,789 INFO L226 Difference]: Without dead ends: 484 [2021-11-20 06:45:27,789 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 06:45:27,790 INFO L933 BasicCegarLoop]: 275 mSDtfsCounter, 114 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 10 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:45:27,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 660 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 274 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 06:45:27,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-11-20 06:45:27,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 401. [2021-11-20 06:45:27,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 1.52) internal successors, (608), 400 states have internal predecessors, (608), 0 states have call successors, (0), 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 06:45:27,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 608 transitions. [2021-11-20 06:45:27,808 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 608 transitions. Word has length 140 [2021-11-20 06:45:27,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:45:27,808 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 608 transitions. [2021-11-20 06:45:27,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 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 06:45:27,808 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 608 transitions. [2021-11-20 06:45:27,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-20 06:45:27,809 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:45:27,810 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2021-11-20 06:45:27,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2021-11-20 06:45:27,810 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:45:27,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:45:27,810 INFO L85 PathProgramCache]: Analyzing trace with hash -2035261760, now seen corresponding path program 1 times [2021-11-20 06:45:27,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:45:27,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578196752] [2021-11-20 06:45:27,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:45:27,811 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:45:27,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:45:27,873 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-20 06:45:27,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:45:27,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578196752] [2021-11-20 06:45:27,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578196752] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:45:27,874 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:45:27,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:45:27,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749765222] [2021-11-20 06:45:27,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:45:27,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:45:27,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:45:27,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:45:27,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:45:27,875 INFO L87 Difference]: Start difference. First operand 401 states and 608 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 06:45:29,888 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 06:45:30,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:45:30,272 INFO L93 Difference]: Finished difference Result 864 states and 1318 transitions. [2021-11-20 06:45:30,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:45:30,272 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 141 [2021-11-20 06:45:30,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:45:30,274 INFO L225 Difference]: With dead ends: 864 [2021-11-20 06:45:30,274 INFO L226 Difference]: Without dead ends: 484 [2021-11-20 06:45:30,275 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 06:45:30,275 INFO L933 BasicCegarLoop]: 275 mSDtfsCounter, 112 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 10 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:45:30,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 660 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 274 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 06:45:30,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-11-20 06:45:30,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 401. [2021-11-20 06:45:30,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 1.5175) internal successors, (607), 400 states have internal predecessors, (607), 0 states have call successors, (0), 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 06:45:30,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 607 transitions. [2021-11-20 06:45:30,291 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 607 transitions. Word has length 141 [2021-11-20 06:45:30,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:45:30,291 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 607 transitions. [2021-11-20 06:45:30,292 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 06:45:30,292 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 607 transitions. [2021-11-20 06:45:30,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-20 06:45:30,293 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:45:30,293 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2021-11-20 06:45:30,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2021-11-20 06:45:30,293 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:45:30,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:45:30,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1416281225, now seen corresponding path program 1 times [2021-11-20 06:45:30,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:45:30,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860531397] [2021-11-20 06:45:30,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:45:30,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:45:30,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:45:30,359 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-20 06:45:30,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:45:30,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860531397] [2021-11-20 06:45:30,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860531397] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:45:30,360 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:45:30,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:45:30,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679384657] [2021-11-20 06:45:30,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:45:30,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:45:30,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:45:30,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:45:30,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:45:30,361 INFO L87 Difference]: Start difference. First operand 401 states and 607 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 06:45:31,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:45:31,288 INFO L93 Difference]: Finished difference Result 864 states and 1316 transitions. [2021-11-20 06:45:31,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:45:31,288 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 142 [2021-11-20 06:45:31,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:45:31,290 INFO L225 Difference]: With dead ends: 864 [2021-11-20 06:45:31,290 INFO L226 Difference]: Without dead ends: 484 [2021-11-20 06:45:31,291 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 06:45:31,291 INFO L933 BasicCegarLoop]: 275 mSDtfsCounter, 110 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-20 06:45:31,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 660 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-20 06:45:31,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-11-20 06:45:31,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 401. [2021-11-20 06:45:31,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 1.515) internal successors, (606), 400 states have internal predecessors, (606), 0 states have call successors, (0), 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 06:45:31,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 606 transitions. [2021-11-20 06:45:31,302 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 606 transitions. Word has length 142 [2021-11-20 06:45:31,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:45:31,302 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 606 transitions. [2021-11-20 06:45:31,302 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 06:45:31,302 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 606 transitions. [2021-11-20 06:45:31,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-20 06:45:31,303 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:45:31,303 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2021-11-20 06:45:31,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2021-11-20 06:45:31,303 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:45:31,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:45:31,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1145183995, now seen corresponding path program 1 times [2021-11-20 06:45:31,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:45:31,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949029462] [2021-11-20 06:45:31,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:45:31,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:45:31,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:45:31,381 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-20 06:45:31,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:45:31,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949029462] [2021-11-20 06:45:31,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949029462] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:45:31,382 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:45:31,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:45:31,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349761115] [2021-11-20 06:45:31,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:45:31,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:45:31,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:45:31,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:45:31,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:45:31,383 INFO L87 Difference]: Start difference. First operand 401 states and 606 transitions. Second operand has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 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 06:45:32,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:45:32,549 INFO L93 Difference]: Finished difference Result 854 states and 1302 transitions. [2021-11-20 06:45:32,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:45:32,549 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 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 143 [2021-11-20 06:45:32,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:45:32,552 INFO L225 Difference]: With dead ends: 854 [2021-11-20 06:45:32,552 INFO L226 Difference]: Without dead ends: 474 [2021-11-20 06:45:32,553 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 06:45:32,553 INFO L933 BasicCegarLoop]: 281 mSDtfsCounter, 101 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 672 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:45:32,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 672 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-20 06:45:32,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-11-20 06:45:32,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 386. [2021-11-20 06:45:32,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 1.5194805194805194) internal successors, (585), 385 states have internal predecessors, (585), 0 states have call successors, (0), 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 06:45:32,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 585 transitions. [2021-11-20 06:45:32,568 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 585 transitions. Word has length 143 [2021-11-20 06:45:32,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:45:32,569 INFO L470 AbstractCegarLoop]: Abstraction has 386 states and 585 transitions. [2021-11-20 06:45:32,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 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 06:45:32,569 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 585 transitions. [2021-11-20 06:45:32,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-20 06:45:32,570 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:45:32,571 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, 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 06:45:32,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2021-11-20 06:45:32,571 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:45:32,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:45:32,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1476561703, now seen corresponding path program 1 times [2021-11-20 06:45:32,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:45:32,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672688024] [2021-11-20 06:45:32,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:45:32,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:45:32,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:45:32,631 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 143 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-20 06:45:32,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:45:32,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672688024] [2021-11-20 06:45:32,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672688024] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:45:32,632 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:45:32,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:45:32,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071915654] [2021-11-20 06:45:32,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:45:32,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:45:32,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:45:32,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:45:32,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:45:32,634 INFO L87 Difference]: Start difference. First operand 386 states and 585 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 06:45:33,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:45:33,754 INFO L93 Difference]: Finished difference Result 839 states and 1280 transitions. [2021-11-20 06:45:33,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:45:33,755 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 145 [2021-11-20 06:45:33,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:45:33,757 INFO L225 Difference]: With dead ends: 839 [2021-11-20 06:45:33,757 INFO L226 Difference]: Without dead ends: 474 [2021-11-20 06:45:33,757 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 06:45:33,757 INFO L933 BasicCegarLoop]: 220 mSDtfsCounter, 87 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:45:33,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 551 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-20 06:45:33,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-11-20 06:45:33,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 414. [2021-11-20 06:45:33,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 1.5254237288135593) internal successors, (630), 413 states have internal predecessors, (630), 0 states have call successors, (0), 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 06:45:33,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 630 transitions. [2021-11-20 06:45:33,770 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 630 transitions. Word has length 145 [2021-11-20 06:45:33,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:45:33,770 INFO L470 AbstractCegarLoop]: Abstraction has 414 states and 630 transitions. [2021-11-20 06:45:33,770 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 06:45:33,770 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 630 transitions. [2021-11-20 06:45:33,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-20 06:45:33,771 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:45:33,771 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, 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 06:45:33,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2021-11-20 06:45:33,772 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:45:33,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:45:33,772 INFO L85 PathProgramCache]: Analyzing trace with hash 876334289, now seen corresponding path program 1 times [2021-11-20 06:45:33,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:45:33,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268211314] [2021-11-20 06:45:33,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:45:33,773 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:45:33,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:45:33,834 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-20 06:45:33,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:45:33,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268211314] [2021-11-20 06:45:33,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268211314] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:45:33,835 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:45:33,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:45:33,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548922156] [2021-11-20 06:45:33,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:45:33,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:45:33,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:45:33,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:45:33,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:45:33,836 INFO L87 Difference]: Start difference. First operand 414 states and 630 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 06:45:35,845 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 06:45:36,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:45:36,126 INFO L93 Difference]: Finished difference Result 859 states and 1311 transitions. [2021-11-20 06:45:36,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:45:36,126 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 146 [2021-11-20 06:45:36,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:45:36,128 INFO L225 Difference]: With dead ends: 859 [2021-11-20 06:45:36,128 INFO L226 Difference]: Without dead ends: 466 [2021-11-20 06:45:36,128 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 06:45:36,129 INFO L933 BasicCegarLoop]: 229 mSDtfsCounter, 76 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:45:36,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 569 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 232 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 06:45:36,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-11-20 06:45:36,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 415. [2021-11-20 06:45:36,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 1.5241545893719808) internal successors, (631), 414 states have internal predecessors, (631), 0 states have call successors, (0), 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 06:45:36,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 631 transitions. [2021-11-20 06:45:36,149 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 631 transitions. Word has length 146 [2021-11-20 06:45:36,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:45:36,150 INFO L470 AbstractCegarLoop]: Abstraction has 415 states and 631 transitions. [2021-11-20 06:45:36,150 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 06:45:36,150 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 631 transitions. [2021-11-20 06:45:36,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-20 06:45:36,151 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:45:36,151 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 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] [2021-11-20 06:45:36,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2021-11-20 06:45:36,152 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:45:36,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:45:36,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1766975766, now seen corresponding path program 1 times [2021-11-20 06:45:36,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:45:36,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642170658] [2021-11-20 06:45:36,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:45:36,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:45:36,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:45:36,212 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-20 06:45:36,213 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:45:36,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642170658] [2021-11-20 06:45:36,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642170658] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:45:36,213 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:45:36,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:45:36,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315397524] [2021-11-20 06:45:36,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:45:36,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:45:36,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:45:36,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:45:36,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:45:36,214 INFO L87 Difference]: Start difference. First operand 415 states and 631 transitions. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 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 06:45:37,813 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:45:38,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:45:38,114 INFO L93 Difference]: Finished difference Result 860 states and 1311 transitions. [2021-11-20 06:45:38,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:45:38,115 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 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 148 [2021-11-20 06:45:38,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:45:38,117 INFO L225 Difference]: With dead ends: 860 [2021-11-20 06:45:38,117 INFO L226 Difference]: Without dead ends: 466 [2021-11-20 06:45:38,117 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 06:45:38,118 INFO L933 BasicCegarLoop]: 229 mSDtfsCounter, 88 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-20 06:45:38,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 569 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-20 06:45:38,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-11-20 06:45:38,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 415. [2021-11-20 06:45:38,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 1.5217391304347827) internal successors, (630), 414 states have internal predecessors, (630), 0 states have call successors, (0), 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 06:45:38,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 630 transitions. [2021-11-20 06:45:38,131 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 630 transitions. Word has length 148 [2021-11-20 06:45:38,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:45:38,131 INFO L470 AbstractCegarLoop]: Abstraction has 415 states and 630 transitions. [2021-11-20 06:45:38,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 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 06:45:38,132 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 630 transitions. [2021-11-20 06:45:38,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-20 06:45:38,132 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:45:38,132 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, 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 06:45:38,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2021-11-20 06:45:38,133 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:45:38,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:45:38,133 INFO L85 PathProgramCache]: Analyzing trace with hash 2127049105, now seen corresponding path program 1 times [2021-11-20 06:45:38,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:45:38,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536026239] [2021-11-20 06:45:38,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:45:38,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:45:38,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:45:38,188 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 147 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-20 06:45:38,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:45:38,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536026239] [2021-11-20 06:45:38,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536026239] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:45:38,189 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:45:38,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:45:38,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463259589] [2021-11-20 06:45:38,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:45:38,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:45:38,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:45:38,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:45:38,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:45:38,190 INFO L87 Difference]: Start difference. First operand 415 states and 630 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 06:45:40,199 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 06:45:40,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:45:40,477 INFO L93 Difference]: Finished difference Result 857 states and 1305 transitions. [2021-11-20 06:45:40,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:45:40,477 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 149 [2021-11-20 06:45:40,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:45:40,480 INFO L225 Difference]: With dead ends: 857 [2021-11-20 06:45:40,480 INFO L226 Difference]: Without dead ends: 463 [2021-11-20 06:45:40,480 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 06:45:40,481 INFO L933 BasicCegarLoop]: 232 mSDtfsCounter, 70 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:45:40,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 575 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 226 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 06:45:40,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-11-20 06:45:40,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 418. [2021-11-20 06:45:40,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 1.5227817745803358) internal successors, (635), 417 states have internal predecessors, (635), 0 states have call successors, (0), 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 06:45:40,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 635 transitions. [2021-11-20 06:45:40,496 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 635 transitions. Word has length 149 [2021-11-20 06:45:40,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:45:40,497 INFO L470 AbstractCegarLoop]: Abstraction has 418 states and 635 transitions. [2021-11-20 06:45:40,497 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 06:45:40,497 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 635 transitions. [2021-11-20 06:45:40,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-20 06:45:40,498 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:45:40,498 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 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] [2021-11-20 06:45:40,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2021-11-20 06:45:40,498 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:45:40,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:45:40,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1658297762, now seen corresponding path program 1 times [2021-11-20 06:45:40,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:45:40,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944946968] [2021-11-20 06:45:40,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:45:40,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:45:40,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:45:40,560 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 149 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-20 06:45:40,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:45:40,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944946968] [2021-11-20 06:45:40,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944946968] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:45:40,561 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:45:40,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:45:40,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477184909] [2021-11-20 06:45:40,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:45:40,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:45:40,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:45:40,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:45:40,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:45:40,562 INFO L87 Difference]: Start difference. First operand 418 states and 635 transitions. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 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 06:45:42,570 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 06:45:42,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:45:42,870 INFO L93 Difference]: Finished difference Result 858 states and 1307 transitions. [2021-11-20 06:45:42,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:45:42,871 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 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 149 [2021-11-20 06:45:42,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:45:42,873 INFO L225 Difference]: With dead ends: 858 [2021-11-20 06:45:42,873 INFO L226 Difference]: Without dead ends: 461 [2021-11-20 06:45:42,874 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 06:45:42,874 INFO L933 BasicCegarLoop]: 234 mSDtfsCounter, 84 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:45:42,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 579 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 222 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 06:45:42,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-11-20 06:45:42,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 418. [2021-11-20 06:45:42,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 1.5203836930455636) internal successors, (634), 417 states have internal predecessors, (634), 0 states have call successors, (0), 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 06:45:42,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 634 transitions. [2021-11-20 06:45:42,890 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 634 transitions. Word has length 149 [2021-11-20 06:45:42,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:45:42,890 INFO L470 AbstractCegarLoop]: Abstraction has 418 states and 634 transitions. [2021-11-20 06:45:42,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 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 06:45:42,891 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 634 transitions. [2021-11-20 06:45:42,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-20 06:45:42,891 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:45:42,891 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] [2021-11-20 06:45:42,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2021-11-20 06:45:42,892 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:45:42,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:45:42,892 INFO L85 PathProgramCache]: Analyzing trace with hash -488183462, now seen corresponding path program 1 times [2021-11-20 06:45:42,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:45:42,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137195728] [2021-11-20 06:45:42,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:45:42,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:45:42,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:45:42,957 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 06:45:42,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:45:42,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137195728] [2021-11-20 06:45:42,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137195728] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:45:42,958 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:45:42,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:45:42,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093330834] [2021-11-20 06:45:42,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:45:42,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:45:42,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:45:42,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:45:42,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:45:42,959 INFO L87 Difference]: Start difference. First operand 418 states and 634 transitions. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 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 06:45:44,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:45:44,139 INFO L93 Difference]: Finished difference Result 849 states and 1289 transitions. [2021-11-20 06:45:44,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:45:44,139 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 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 149 [2021-11-20 06:45:44,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:45:44,140 INFO L225 Difference]: With dead ends: 849 [2021-11-20 06:45:44,141 INFO L226 Difference]: Without dead ends: 452 [2021-11-20 06:45:44,141 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 06:45:44,141 INFO L933 BasicCegarLoop]: 245 mSDtfsCounter, 68 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 601 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:45:44,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 601 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-20 06:45:44,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2021-11-20 06:45:44,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 418. [2021-11-20 06:45:44,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 1.5179856115107915) internal successors, (633), 417 states have internal predecessors, (633), 0 states have call successors, (0), 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 06:45:44,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 633 transitions. [2021-11-20 06:45:44,156 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 633 transitions. Word has length 149 [2021-11-20 06:45:44,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:45:44,156 INFO L470 AbstractCegarLoop]: Abstraction has 418 states and 633 transitions. [2021-11-20 06:45:44,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 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 06:45:44,156 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 633 transitions. [2021-11-20 06:45:44,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-20 06:45:44,157 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:45:44,157 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2021-11-20 06:45:44,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2021-11-20 06:45:44,157 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:45:44,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:45:44,158 INFO L85 PathProgramCache]: Analyzing trace with hash -887321117, now seen corresponding path program 1 times [2021-11-20 06:45:44,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:45:44,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415546398] [2021-11-20 06:45:44,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:45:44,158 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:45:44,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:45:44,228 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-20 06:45:44,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:45:44,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415546398] [2021-11-20 06:45:44,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415546398] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:45:44,228 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:45:44,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:45:44,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067071244] [2021-11-20 06:45:44,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:45:44,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:45:44,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:45:44,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:45:44,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:45:44,230 INFO L87 Difference]: Start difference. First operand 418 states and 633 transitions. Second operand has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 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 06:45:45,892 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:45:46,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:45:46,268 INFO L93 Difference]: Finished difference Result 871 states and 1322 transitions. [2021-11-20 06:45:46,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:45:46,268 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 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 06:45:46,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:45:46,269 INFO L225 Difference]: With dead ends: 871 [2021-11-20 06:45:46,269 INFO L226 Difference]: Without dead ends: 474 [2021-11-20 06:45:46,270 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 06:45:46,270 INFO L933 BasicCegarLoop]: 257 mSDtfsCounter, 87 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 624 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:45:46,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 624 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-20 06:45:46,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-11-20 06:45:46,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 418. [2021-11-20 06:45:46,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 1.515587529976019) internal successors, (632), 417 states have internal predecessors, (632), 0 states have call successors, (0), 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 06:45:46,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 632 transitions. [2021-11-20 06:45:46,293 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 632 transitions. Word has length 150 [2021-11-20 06:45:46,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:45:46,294 INFO L470 AbstractCegarLoop]: Abstraction has 418 states and 632 transitions. [2021-11-20 06:45:46,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 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 06:45:46,294 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 632 transitions. [2021-11-20 06:45:46,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-20 06:45:46,295 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:45:46,295 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] [2021-11-20 06:45:46,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2021-11-20 06:45:46,296 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:45:46,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:45:46,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1254432062, now seen corresponding path program 1 times [2021-11-20 06:45:46,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:45:46,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000499684] [2021-11-20 06:45:46,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:45:46,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:45:46,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:45:46,360 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 06:45:46,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:45:46,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000499684] [2021-11-20 06:45:46,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000499684] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:45:46,361 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:45:46,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:45:46,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420967409] [2021-11-20 06:45:46,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:45:46,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:45:46,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:45:46,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:45:46,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:45:46,362 INFO L87 Difference]: Start difference. First operand 418 states and 632 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 06:45:48,370 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 06:45:48,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:45:48,671 INFO L93 Difference]: Finished difference Result 849 states and 1285 transitions. [2021-11-20 06:45:48,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:45:48,672 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 06:45:48,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:45:48,673 INFO L225 Difference]: With dead ends: 849 [2021-11-20 06:45:48,673 INFO L226 Difference]: Without dead ends: 452 [2021-11-20 06:45:48,673 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 06:45:48,673 INFO L933 BasicCegarLoop]: 244 mSDtfsCounter, 66 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 599 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:45:48,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 599 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 214 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 06:45:48,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2021-11-20 06:45:48,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 418. [2021-11-20 06:45:48,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 1.513189448441247) internal successors, (631), 417 states have internal predecessors, (631), 0 states have call successors, (0), 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 06:45:48,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 631 transitions. [2021-11-20 06:45:48,687 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 631 transitions. Word has length 150 [2021-11-20 06:45:48,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:45:48,688 INFO L470 AbstractCegarLoop]: Abstraction has 418 states and 631 transitions. [2021-11-20 06:45:48,688 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 06:45:48,688 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 631 transitions. [2021-11-20 06:45:48,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-20 06:45:48,688 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:45:48,689 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2021-11-20 06:45:48,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2021-11-20 06:45:48,689 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:45:48,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:45:48,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1962923271, now seen corresponding path program 1 times [2021-11-20 06:45:48,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:45:48,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664768372] [2021-11-20 06:45:48,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:45:48,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:45:48,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:45:48,751 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 138 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-20 06:45:48,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:45:48,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664768372] [2021-11-20 06:45:48,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664768372] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:45:48,752 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:45:48,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:45:48,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780578346] [2021-11-20 06:45:48,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:45:48,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:45:48,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:45:48,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:45:48,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:45:48,754 INFO L87 Difference]: Start difference. First operand 418 states and 631 transitions. Second operand has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 0 states have call successors, (0), 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 06:45:50,762 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 06:45:51,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:45:51,107 INFO L93 Difference]: Finished difference Result 863 states and 1305 transitions. [2021-11-20 06:45:51,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:45:51,108 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 0 states have call successors, (0), 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 06:45:51,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:45:51,113 INFO L225 Difference]: With dead ends: 863 [2021-11-20 06:45:51,113 INFO L226 Difference]: Without dead ends: 466 [2021-11-20 06:45:51,113 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 06:45:51,114 INFO L933 BasicCegarLoop]: 266 mSDtfsCounter, 76 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 642 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:45:51,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 642 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 238 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 06:45:51,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-11-20 06:45:51,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 418. [2021-11-20 06:45:51,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 1.5107913669064748) internal successors, (630), 417 states have internal predecessors, (630), 0 states have call successors, (0), 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 06:45:51,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 630 transitions. [2021-11-20 06:45:51,137 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 630 transitions. Word has length 151 [2021-11-20 06:45:51,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:45:51,137 INFO L470 AbstractCegarLoop]: Abstraction has 418 states and 630 transitions. [2021-11-20 06:45:51,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 0 states have call successors, (0), 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 06:45:51,138 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 630 transitions. [2021-11-20 06:45:51,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-20 06:45:51,139 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:45:51,139 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, 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 06:45:51,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2021-11-20 06:45:51,140 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:45:51,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:45:51,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1039041842, now seen corresponding path program 1 times [2021-11-20 06:45:51,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:45:51,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628703337] [2021-11-20 06:45:51,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:45:51,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:45:51,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:45:51,207 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 148 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-20 06:45:51,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:45:51,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628703337] [2021-11-20 06:45:51,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628703337] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:45:51,208 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:45:51,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:45:51,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410354622] [2021-11-20 06:45:51,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:45:51,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:45:51,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:45:51,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:45:51,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:45:51,210 INFO L87 Difference]: Start difference. First operand 418 states and 630 transitions. Second operand has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 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 06:45:52,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:45:52,329 INFO L93 Difference]: Finished difference Result 858 states and 1297 transitions. [2021-11-20 06:45:52,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:45:52,329 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 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 06:45:52,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:45:52,330 INFO L225 Difference]: With dead ends: 858 [2021-11-20 06:45:52,330 INFO L226 Difference]: Without dead ends: 461 [2021-11-20 06:45:52,330 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 06:45:52,331 INFO L933 BasicCegarLoop]: 234 mSDtfsCounter, 67 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:45:52,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 579 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-20 06:45:52,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-11-20 06:45:52,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 419. [2021-11-20 06:45:52,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 1.5095693779904307) internal successors, (631), 418 states have internal predecessors, (631), 0 states have call successors, (0), 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 06:45:52,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 631 transitions. [2021-11-20 06:45:52,352 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 631 transitions. Word has length 151 [2021-11-20 06:45:52,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:45:52,353 INFO L470 AbstractCegarLoop]: Abstraction has 419 states and 631 transitions. [2021-11-20 06:45:52,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 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 06:45:52,353 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 631 transitions. [2021-11-20 06:45:52,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-20 06:45:52,354 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:45:52,354 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] [2021-11-20 06:45:52,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2021-11-20 06:45:52,355 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:45:52,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:45:52,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1314602933, now seen corresponding path program 1 times [2021-11-20 06:45:52,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:45:52,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082188578] [2021-11-20 06:45:52,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:45:52,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:45:52,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:45:52,417 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 06:45:52,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:45:52,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082188578] [2021-11-20 06:45:52,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082188578] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:45:52,418 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:45:52,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:45:52,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828428101] [2021-11-20 06:45:52,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:45:52,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:45:52,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:45:52,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:45:52,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:45:52,419 INFO L87 Difference]: Start difference. First operand 419 states and 631 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 06:45:53,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:45:53,689 INFO L93 Difference]: Finished difference Result 851 states and 1283 transitions. [2021-11-20 06:45:53,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:45:53,689 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 06:45:53,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:45:53,690 INFO L225 Difference]: With dead ends: 851 [2021-11-20 06:45:53,690 INFO L226 Difference]: Without dead ends: 453 [2021-11-20 06:45:53,691 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 06:45:53,691 INFO L933 BasicCegarLoop]: 231 mSDtfsCounter, 64 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:45:53,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 573 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-20 06:45:53,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-11-20 06:45:53,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 419. [2021-11-20 06:45:53,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 1.507177033492823) internal successors, (630), 418 states have internal predecessors, (630), 0 states have call successors, (0), 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 06:45:53,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 630 transitions. [2021-11-20 06:45:53,712 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 630 transitions. Word has length 151 [2021-11-20 06:45:53,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:45:53,713 INFO L470 AbstractCegarLoop]: Abstraction has 419 states and 630 transitions. [2021-11-20 06:45:53,713 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 06:45:53,713 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 630 transitions. [2021-11-20 06:45:53,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-20 06:45:53,714 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:45:53,715 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, 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] [2021-11-20 06:45:53,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2021-11-20 06:45:53,716 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:45:53,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:45:53,717 INFO L85 PathProgramCache]: Analyzing trace with hash -644183121, now seen corresponding path program 1 times [2021-11-20 06:45:53,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:45:53,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129678505] [2021-11-20 06:45:53,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:45:53,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:45:53,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:45:53,797 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 149 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-20 06:45:53,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:45:53,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129678505] [2021-11-20 06:45:53,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129678505] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:45:53,798 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:45:53,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:45:53,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264497911] [2021-11-20 06:45:53,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:45:53,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:45:53,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:45:53,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:45:53,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:45:53,799 INFO L87 Difference]: Start difference. First operand 419 states and 630 transitions. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 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 06:45:55,813 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 06:45:56,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:45:56,096 INFO L93 Difference]: Finished difference Result 855 states and 1290 transitions. [2021-11-20 06:45:56,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:45:56,096 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 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 152 [2021-11-20 06:45:56,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:45:56,097 INFO L225 Difference]: With dead ends: 855 [2021-11-20 06:45:56,097 INFO L226 Difference]: Without dead ends: 457 [2021-11-20 06:45:56,097 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 06:45:56,098 INFO L933 BasicCegarLoop]: 236 mSDtfsCounter, 62 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 583 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:45:56,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 583 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 218 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 06:45:56,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-11-20 06:45:56,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 420. [2021-11-20 06:45:56,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 419 states have (on average 1.505966587112172) internal successors, (631), 419 states have internal predecessors, (631), 0 states have call successors, (0), 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 06:45:56,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 631 transitions. [2021-11-20 06:45:56,114 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 631 transitions. Word has length 152 [2021-11-20 06:45:56,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:45:56,114 INFO L470 AbstractCegarLoop]: Abstraction has 420 states and 631 transitions. [2021-11-20 06:45:56,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 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 06:45:56,114 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 631 transitions. [2021-11-20 06:45:56,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-20 06:45:56,115 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:45:56,115 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, 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] [2021-11-20 06:45:56,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2021-11-20 06:45:56,116 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:45:56,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:45:56,116 INFO L85 PathProgramCache]: Analyzing trace with hash -122824159, now seen corresponding path program 1 times [2021-11-20 06:45:56,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:45:56,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243066574] [2021-11-20 06:45:56,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:45:56,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:45:56,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:45:56,173 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 150 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-20 06:45:56,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:45:56,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243066574] [2021-11-20 06:45:56,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243066574] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:45:56,174 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:45:56,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:45:56,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191834018] [2021-11-20 06:45:56,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:45:56,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:45:56,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:45:56,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:45:56,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:45:56,176 INFO L87 Difference]: Start difference. First operand 420 states and 631 transitions. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 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 06:45:57,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:45:57,317 INFO L93 Difference]: Finished difference Result 856 states and 1290 transitions. [2021-11-20 06:45:57,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:45:57,317 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 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 152 [2021-11-20 06:45:57,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:45:57,318 INFO L225 Difference]: With dead ends: 856 [2021-11-20 06:45:57,318 INFO L226 Difference]: Without dead ends: 457 [2021-11-20 06:45:57,318 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 06:45:57,319 INFO L933 BasicCegarLoop]: 236 mSDtfsCounter, 60 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 583 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:45:57,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 583 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-20 06:45:57,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-11-20 06:45:57,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 421. [2021-11-20 06:45:57,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 1.5047619047619047) internal successors, (632), 420 states have internal predecessors, (632), 0 states have call successors, (0), 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 06:45:57,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 632 transitions. [2021-11-20 06:45:57,334 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 632 transitions. Word has length 152 [2021-11-20 06:45:57,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:45:57,334 INFO L470 AbstractCegarLoop]: Abstraction has 421 states and 632 transitions. [2021-11-20 06:45:57,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 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 06:45:57,334 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 632 transitions. [2021-11-20 06:45:57,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-20 06:45:57,335 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:45:57,335 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] [2021-11-20 06:45:57,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2021-11-20 06:45:57,335 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:45:57,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:45:57,336 INFO L85 PathProgramCache]: Analyzing trace with hash -96753027, now seen corresponding path program 1 times [2021-11-20 06:45:57,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:45:57,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453258005] [2021-11-20 06:45:57,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:45:57,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:45:57,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:45:57,396 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 06:45:57,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:45:57,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453258005] [2021-11-20 06:45:57,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453258005] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:45:57,397 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:45:57,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:45:57,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431133786] [2021-11-20 06:45:57,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:45:57,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:45:57,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:45:57,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:45:57,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:45:57,399 INFO L87 Difference]: Start difference. First operand 421 states and 632 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 06:45:59,408 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 06:45:59,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:45:59,676 INFO L93 Difference]: Finished difference Result 845 states and 1273 transitions. [2021-11-20 06:45:59,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:45:59,676 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 06:45:59,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:45:59,677 INFO L225 Difference]: With dead ends: 845 [2021-11-20 06:45:59,677 INFO L226 Difference]: Without dead ends: 445 [2021-11-20 06:45:59,678 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 06:45:59,678 INFO L933 BasicCegarLoop]: 237 mSDtfsCounter, 55 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 585 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:45:59,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 585 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 198 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-11-20 06:45:59,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2021-11-20 06:45:59,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 421. [2021-11-20 06:45:59,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 1.5023809523809524) internal successors, (631), 420 states have internal predecessors, (631), 0 states have call successors, (0), 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 06:45:59,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 631 transitions. [2021-11-20 06:45:59,693 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 631 transitions. Word has length 152 [2021-11-20 06:45:59,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:45:59,693 INFO L470 AbstractCegarLoop]: Abstraction has 421 states and 631 transitions. [2021-11-20 06:45:59,693 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 06:45:59,693 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 631 transitions. [2021-11-20 06:45:59,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-11-20 06:45:59,694 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:45:59,694 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 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] [2021-11-20 06:45:59,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2021-11-20 06:45:59,694 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:45:59,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:45:59,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1993032756, now seen corresponding path program 1 times [2021-11-20 06:45:59,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:45:59,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653536732] [2021-11-20 06:45:59,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:45:59,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:45:59,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:45:59,753 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-20 06:45:59,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:45:59,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653536732] [2021-11-20 06:45:59,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653536732] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:45:59,753 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:45:59,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:45:59,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168837755] [2021-11-20 06:45:59,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:45:59,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:45:59,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:45:59,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:45:59,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:45:59,755 INFO L87 Difference]: Start difference. First operand 421 states and 631 transitions. Second operand has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 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 06:46:01,770 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 06:46:02,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:46:02,100 INFO L93 Difference]: Finished difference Result 866 states and 1299 transitions. [2021-11-20 06:46:02,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:46:02,100 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 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 06:46:02,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:46:02,101 INFO L225 Difference]: With dead ends: 866 [2021-11-20 06:46:02,101 INFO L226 Difference]: Without dead ends: 466 [2021-11-20 06:46:02,102 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 06:46:02,102 INFO L933 BasicCegarLoop]: 258 mSDtfsCounter, 88 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:46:02,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 626 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 236 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 06:46:02,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-11-20 06:46:02,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 421. [2021-11-20 06:46:02,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 1.5) internal successors, (630), 420 states have internal predecessors, (630), 0 states have call successors, (0), 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 06:46:02,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 630 transitions. [2021-11-20 06:46:02,121 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 630 transitions. Word has length 153 [2021-11-20 06:46:02,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:46:02,121 INFO L470 AbstractCegarLoop]: Abstraction has 421 states and 630 transitions. [2021-11-20 06:46:02,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 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 06:46:02,122 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 630 transitions. [2021-11-20 06:46:02,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-11-20 06:46:02,122 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:46:02,122 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, 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] [2021-11-20 06:46:02,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2021-11-20 06:46:02,123 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:46:02,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:46:02,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1908659876, now seen corresponding path program 1 times [2021-11-20 06:46:02,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:46:02,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525712243] [2021-11-20 06:46:02,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:46:02,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:46:02,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:46:02,178 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 151 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-20 06:46:02,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:46:02,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525712243] [2021-11-20 06:46:02,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525712243] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:46:02,179 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:46:02,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:46:02,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272467273] [2021-11-20 06:46:02,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:46:02,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:46:02,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:46:02,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:46:02,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:46:02,181 INFO L87 Difference]: Start difference. First operand 421 states and 630 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 06:46:03,984 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:46:04,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:46:04,261 INFO L93 Difference]: Finished difference Result 855 states and 1284 transitions. [2021-11-20 06:46:04,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:46:04,262 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 153 [2021-11-20 06:46:04,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:46:04,262 INFO L225 Difference]: With dead ends: 855 [2021-11-20 06:46:04,262 INFO L226 Difference]: Without dead ends: 455 [2021-11-20 06:46:04,263 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 06:46:04,263 INFO L933 BasicCegarLoop]: 237 mSDtfsCounter, 57 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 585 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:46:04,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 585 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-20 06:46:04,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2021-11-20 06:46:04,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 422. [2021-11-20 06:46:04,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 421 states have (on average 1.498812351543943) internal successors, (631), 421 states have internal predecessors, (631), 0 states have call successors, (0), 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 06:46:04,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 631 transitions. [2021-11-20 06:46:04,287 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 631 transitions. Word has length 153 [2021-11-20 06:46:04,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:46:04,288 INFO L470 AbstractCegarLoop]: Abstraction has 422 states and 631 transitions. [2021-11-20 06:46:04,288 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 06:46:04,288 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 631 transitions. [2021-11-20 06:46:04,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-20 06:46:04,289 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:46:04,289 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2021-11-20 06:46:04,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2021-11-20 06:46:04,289 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:46:04,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:46:04,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1530901915, now seen corresponding path program 1 times [2021-11-20 06:46:04,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:46:04,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901526687] [2021-11-20 06:46:04,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:46:04,290 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:46:04,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:46:04,354 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-20 06:46:04,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:46:04,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901526687] [2021-11-20 06:46:04,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901526687] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:46:04,355 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:46:04,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:46:04,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233528934] [2021-11-20 06:46:04,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:46:04,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:46:04,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:46:04,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:46:04,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:46:04,357 INFO L87 Difference]: Start difference. First operand 422 states and 631 transitions. Second operand has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 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 06:46:05,588 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:46:05,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:46:05,867 INFO L93 Difference]: Finished difference Result 864 states and 1293 transitions. [2021-11-20 06:46:05,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:46:05,867 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 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 154 [2021-11-20 06:46:05,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:46:05,868 INFO L225 Difference]: With dead ends: 864 [2021-11-20 06:46:05,868 INFO L226 Difference]: Without dead ends: 463 [2021-11-20 06:46:05,868 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 06:46:05,869 INFO L933 BasicCegarLoop]: 258 mSDtfsCounter, 70 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:46:05,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 626 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-20 06:46:05,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-11-20 06:46:05,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 422. [2021-11-20 06:46:05,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 421 states have (on average 1.496437054631829) internal successors, (630), 421 states have internal predecessors, (630), 0 states have call successors, (0), 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 06:46:05,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 630 transitions. [2021-11-20 06:46:05,886 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 630 transitions. Word has length 154 [2021-11-20 06:46:05,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:46:05,886 INFO L470 AbstractCegarLoop]: Abstraction has 422 states and 630 transitions. [2021-11-20 06:46:05,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 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 06:46:05,886 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 630 transitions. [2021-11-20 06:46:05,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-20 06:46:05,887 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:46:05,887 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 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] [2021-11-20 06:46:05,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2021-11-20 06:46:05,887 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:46:05,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:46:05,888 INFO L85 PathProgramCache]: Analyzing trace with hash 2040522344, now seen corresponding path program 1 times [2021-11-20 06:46:05,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:46:05,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083093064] [2021-11-20 06:46:05,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:46:05,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:46:05,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:46:05,937 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-20 06:46:05,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:46:05,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083093064] [2021-11-20 06:46:05,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083093064] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:46:05,938 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:46:05,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:46:05,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340495570] [2021-11-20 06:46:05,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:46:05,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:46:05,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:46:05,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:46:05,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:46:05,939 INFO L87 Difference]: Start difference. First operand 422 states and 630 transitions. Second operand has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 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 06:46:07,348 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:46:07,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:46:07,626 INFO L93 Difference]: Finished difference Result 862 states and 1289 transitions. [2021-11-20 06:46:07,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:46:07,627 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 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 154 [2021-11-20 06:46:07,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:46:07,628 INFO L225 Difference]: With dead ends: 862 [2021-11-20 06:46:07,628 INFO L226 Difference]: Without dead ends: 461 [2021-11-20 06:46:07,628 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 06:46:07,628 INFO L933 BasicCegarLoop]: 260 mSDtfsCounter, 84 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 630 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:46:07,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 630 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-20 06:46:07,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-11-20 06:46:07,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 422. [2021-11-20 06:46:07,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 421 states have (on average 1.494061757719715) internal successors, (629), 421 states have internal predecessors, (629), 0 states have call successors, (0), 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 06:46:07,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 629 transitions. [2021-11-20 06:46:07,645 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 629 transitions. Word has length 154 [2021-11-20 06:46:07,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:46:07,646 INFO L470 AbstractCegarLoop]: Abstraction has 422 states and 629 transitions. [2021-11-20 06:46:07,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 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 06:46:07,646 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 629 transitions. [2021-11-20 06:46:07,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-20 06:46:07,647 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:46:07,647 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, 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] [2021-11-20 06:46:07,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2021-11-20 06:46:07,647 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:46:07,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:46:07,647 INFO L85 PathProgramCache]: Analyzing trace with hash 2056927036, now seen corresponding path program 1 times [2021-11-20 06:46:07,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:46:07,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6036363] [2021-11-20 06:46:07,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:46:07,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:46:07,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:46:07,705 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 152 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-20 06:46:07,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:46:07,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6036363] [2021-11-20 06:46:07,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6036363] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:46:07,706 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:46:07,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:46:07,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765681877] [2021-11-20 06:46:07,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:46:07,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:46:07,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:46:07,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:46:07,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:46:07,708 INFO L87 Difference]: Start difference. First operand 422 states and 629 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 06:46:09,655 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:46:09,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:46:09,948 INFO L93 Difference]: Finished difference Result 856 states and 1280 transitions. [2021-11-20 06:46:09,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:46:09,948 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 154 [2021-11-20 06:46:09,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:46:09,949 INFO L225 Difference]: With dead ends: 856 [2021-11-20 06:46:09,950 INFO L226 Difference]: Without dead ends: 455 [2021-11-20 06:46:09,950 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 06:46:09,950 INFO L933 BasicCegarLoop]: 237 mSDtfsCounter, 55 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 585 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:46:09,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 585 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-20 06:46:09,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2021-11-20 06:46:09,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 423. [2021-11-20 06:46:09,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 422 states have (on average 1.4928909952606635) internal successors, (630), 422 states have internal predecessors, (630), 0 states have call successors, (0), 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 06:46:09,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 630 transitions. [2021-11-20 06:46:09,967 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 630 transitions. Word has length 154 [2021-11-20 06:46:09,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:46:09,968 INFO L470 AbstractCegarLoop]: Abstraction has 423 states and 630 transitions. [2021-11-20 06:46:09,968 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 06:46:09,968 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 630 transitions. [2021-11-20 06:46:09,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-11-20 06:46:09,969 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:46:09,969 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, 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] [2021-11-20 06:46:09,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2021-11-20 06:46:09,969 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:46:09,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:46:09,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1520151969, now seen corresponding path program 1 times [2021-11-20 06:46:09,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:46:09,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435063044] [2021-11-20 06:46:09,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:46:09,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:46:09,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:46:10,032 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 153 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-20 06:46:10,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:46:10,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435063044] [2021-11-20 06:46:10,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435063044] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:46:10,033 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:46:10,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:46:10,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504073664] [2021-11-20 06:46:10,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:46:10,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:46:10,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:46:10,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:46:10,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:46:10,034 INFO L87 Difference]: Start difference. First operand 423 states and 630 transitions. Second operand has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 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 06:46:12,052 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 06:46:12,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:46:12,314 INFO L93 Difference]: Finished difference Result 855 states and 1278 transitions. [2021-11-20 06:46:12,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:46:12,315 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 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 06:46:12,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:46:12,315 INFO L225 Difference]: With dead ends: 855 [2021-11-20 06:46:12,316 INFO L226 Difference]: Without dead ends: 453 [2021-11-20 06:46:12,316 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 06:46:12,316 INFO L933 BasicCegarLoop]: 238 mSDtfsCounter, 52 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:46:12,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 587 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 214 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 06:46:12,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-11-20 06:46:12,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 424. [2021-11-20 06:46:12,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 423 states have (on average 1.491725768321513) internal successors, (631), 423 states have internal predecessors, (631), 0 states have call successors, (0), 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 06:46:12,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 631 transitions. [2021-11-20 06:46:12,343 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 631 transitions. Word has length 155 [2021-11-20 06:46:12,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:46:12,343 INFO L470 AbstractCegarLoop]: Abstraction has 424 states and 631 transitions. [2021-11-20 06:46:12,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 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 06:46:12,344 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 631 transitions. [2021-11-20 06:46:12,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-20 06:46:12,345 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:46:12,345 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 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] [2021-11-20 06:46:12,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2021-11-20 06:46:12,345 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:46:12,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:46:12,346 INFO L85 PathProgramCache]: Analyzing trace with hash -627757380, now seen corresponding path program 1 times [2021-11-20 06:46:12,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:46:12,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337378437] [2021-11-20 06:46:12,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:46:12,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:46:12,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:46:12,409 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 146 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-20 06:46:12,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:46:12,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337378437] [2021-11-20 06:46:12,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337378437] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:46:12,410 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:46:12,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:46:12,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465876198] [2021-11-20 06:46:12,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:46:12,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:46:12,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:46:12,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:46:12,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:46:12,411 INFO L87 Difference]: Start difference. First operand 424 states and 631 transitions. Second operand has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 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 06:46:13,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:46:13,636 INFO L93 Difference]: Finished difference Result 864 states and 1287 transitions. [2021-11-20 06:46:13,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:46:13,636 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 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 156 [2021-11-20 06:46:13,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:46:13,637 INFO L225 Difference]: With dead ends: 864 [2021-11-20 06:46:13,637 INFO L226 Difference]: Without dead ends: 461 [2021-11-20 06:46:13,638 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 06:46:13,638 INFO L933 BasicCegarLoop]: 256 mSDtfsCounter, 67 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 622 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:46:13,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 622 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-20 06:46:13,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-11-20 06:46:13,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 424. [2021-11-20 06:46:13,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 423 states have (on average 1.4893617021276595) internal successors, (630), 423 states have internal predecessors, (630), 0 states have call successors, (0), 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 06:46:13,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 630 transitions. [2021-11-20 06:46:13,654 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 630 transitions. Word has length 156 [2021-11-20 06:46:13,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:46:13,654 INFO L470 AbstractCegarLoop]: Abstraction has 424 states and 630 transitions. [2021-11-20 06:46:13,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 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 06:46:13,654 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 630 transitions. [2021-11-20 06:46:13,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-11-20 06:46:13,655 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:46:13,655 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2021-11-20 06:46:13,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2021-11-20 06:46:13,655 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:46:13,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:46:13,655 INFO L85 PathProgramCache]: Analyzing trace with hash -775351451, now seen corresponding path program 1 times [2021-11-20 06:46:13,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:46:13,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583741309] [2021-11-20 06:46:13,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:46:13,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:46:13,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:46:13,705 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 148 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-20 06:46:13,705 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:46:13,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583741309] [2021-11-20 06:46:13,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583741309] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:46:13,706 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:46:13,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:46:13,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466989121] [2021-11-20 06:46:13,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:46:13,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:46:13,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:46:13,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:46:13,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:46:13,707 INFO L87 Difference]: Start difference. First operand 424 states and 630 transitions. Second operand has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 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 06:46:15,651 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:46:15,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:46:15,926 INFO L93 Difference]: Finished difference Result 860 states and 1280 transitions. [2021-11-20 06:46:15,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:46:15,926 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 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 157 [2021-11-20 06:46:15,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:46:15,927 INFO L225 Difference]: With dead ends: 860 [2021-11-20 06:46:15,927 INFO L226 Difference]: Without dead ends: 457 [2021-11-20 06:46:15,928 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 06:46:15,928 INFO L933 BasicCegarLoop]: 258 mSDtfsCounter, 62 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:46:15,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 626 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-20 06:46:15,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-11-20 06:46:15,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 424. [2021-11-20 06:46:15,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 423 states have (on average 1.4869976359338062) internal successors, (629), 423 states have internal predecessors, (629), 0 states have call successors, (0), 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 06:46:15,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 629 transitions. [2021-11-20 06:46:15,950 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 629 transitions. Word has length 157 [2021-11-20 06:46:15,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:46:15,950 INFO L470 AbstractCegarLoop]: Abstraction has 424 states and 629 transitions. [2021-11-20 06:46:15,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 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 06:46:15,950 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 629 transitions. [2021-11-20 06:46:15,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-11-20 06:46:15,951 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:46:15,951 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2021-11-20 06:46:15,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2021-11-20 06:46:15,951 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:46:15,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:46:15,951 INFO L85 PathProgramCache]: Analyzing trace with hash -253992489, now seen corresponding path program 1 times [2021-11-20 06:46:15,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:46:15,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966001853] [2021-11-20 06:46:15,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:46:15,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:46:15,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:46:16,009 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 150 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-20 06:46:16,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:46:16,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966001853] [2021-11-20 06:46:16,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966001853] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:46:16,010 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:46:16,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:46:16,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516800829] [2021-11-20 06:46:16,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:46:16,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:46:16,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:46:16,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:46:16,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:46:16,012 INFO L87 Difference]: Start difference. First operand 424 states and 629 transitions. Second operand has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 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 06:46:17,485 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:46:17,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:46:17,756 INFO L93 Difference]: Finished difference Result 860 states and 1278 transitions. [2021-11-20 06:46:17,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:46:17,756 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 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 157 [2021-11-20 06:46:17,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:46:17,757 INFO L225 Difference]: With dead ends: 860 [2021-11-20 06:46:17,757 INFO L226 Difference]: Without dead ends: 457 [2021-11-20 06:46:17,758 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 06:46:17,758 INFO L933 BasicCegarLoop]: 258 mSDtfsCounter, 60 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:46:17,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 626 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-20 06:46:17,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-11-20 06:46:17,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 424. [2021-11-20 06:46:17,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 423 states have (on average 1.4846335697399526) internal successors, (628), 423 states have internal predecessors, (628), 0 states have call successors, (0), 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 06:46:17,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 628 transitions. [2021-11-20 06:46:17,786 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 628 transitions. Word has length 157 [2021-11-20 06:46:17,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:46:17,786 INFO L470 AbstractCegarLoop]: Abstraction has 424 states and 628 transitions. [2021-11-20 06:46:17,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 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 06:46:17,787 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 628 transitions. [2021-11-20 06:46:17,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-20 06:46:17,788 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:46:17,788 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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] [2021-11-20 06:46:17,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2021-11-20 06:46:17,788 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:46:17,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:46:17,789 INFO L85 PathProgramCache]: Analyzing trace with hash 2137408942, now seen corresponding path program 1 times [2021-11-20 06:46:17,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:46:17,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133255681] [2021-11-20 06:46:17,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:46:17,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:46:17,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:46:17,846 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 152 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-20 06:46:17,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:46:17,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133255681] [2021-11-20 06:46:17,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133255681] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:46:17,847 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:46:17,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:46:17,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395029160] [2021-11-20 06:46:17,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:46:17,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:46:17,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:46:17,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:46:17,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:46:17,848 INFO L87 Difference]: Start difference. First operand 424 states and 628 transitions. Second operand has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 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 06:46:19,857 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 06:46:20,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:46:20,142 INFO L93 Difference]: Finished difference Result 858 states and 1274 transitions. [2021-11-20 06:46:20,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:46:20,142 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 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 158 [2021-11-20 06:46:20,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:46:20,143 INFO L225 Difference]: With dead ends: 858 [2021-11-20 06:46:20,143 INFO L226 Difference]: Without dead ends: 455 [2021-11-20 06:46:20,143 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 06:46:20,144 INFO L933 BasicCegarLoop]: 259 mSDtfsCounter, 57 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 628 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:46:20,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 628 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 218 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 06:46:20,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2021-11-20 06:46:20,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 424. [2021-11-20 06:46:20,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 423 states have (on average 1.4822695035460993) internal successors, (627), 423 states have internal predecessors, (627), 0 states have call successors, (0), 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 06:46:20,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 627 transitions. [2021-11-20 06:46:20,161 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 627 transitions. Word has length 158 [2021-11-20 06:46:20,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:46:20,161 INFO L470 AbstractCegarLoop]: Abstraction has 424 states and 627 transitions. [2021-11-20 06:46:20,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 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 06:46:20,162 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 627 transitions. [2021-11-20 06:46:20,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-11-20 06:46:20,162 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:46:20,162 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-20 06:46:20,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2021-11-20 06:46:20,163 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:46:20,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:46:20,163 INFO L85 PathProgramCache]: Analyzing trace with hash 558213490, now seen corresponding path program 1 times [2021-11-20 06:46:20,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:46:20,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484531428] [2021-11-20 06:46:20,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:46:20,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:46:20,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:46:20,208 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-20 06:46:20,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:46:20,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484531428] [2021-11-20 06:46:20,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484531428] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:46:20,208 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:46:20,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:46:20,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039408232] [2021-11-20 06:46:20,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:46:20,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:46:20,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:46:20,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:46:20,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:46:20,210 INFO L87 Difference]: Start difference. First operand 424 states and 627 transitions. Second operand has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 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 06:46:22,216 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:46:22,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:46:22,497 INFO L93 Difference]: Finished difference Result 858 states and 1272 transitions. [2021-11-20 06:46:22,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:46:22,497 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 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 06:46:22,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:46:22,498 INFO L225 Difference]: With dead ends: 858 [2021-11-20 06:46:22,498 INFO L226 Difference]: Without dead ends: 455 [2021-11-20 06:46:22,499 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 06:46:22,499 INFO L933 BasicCegarLoop]: 259 mSDtfsCounter, 55 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 628 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:46:22,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 628 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 218 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 06:46:22,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2021-11-20 06:46:22,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 424. [2021-11-20 06:46:22,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 423 states have (on average 1.4799054373522458) internal successors, (626), 423 states have internal predecessors, (626), 0 states have call successors, (0), 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 06:46:22,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 626 transitions. [2021-11-20 06:46:22,516 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 626 transitions. Word has length 159 [2021-11-20 06:46:22,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:46:22,516 INFO L470 AbstractCegarLoop]: Abstraction has 424 states and 626 transitions. [2021-11-20 06:46:22,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 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 06:46:22,516 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 626 transitions. [2021-11-20 06:46:22,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-11-20 06:46:22,517 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:46:22,517 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] [2021-11-20 06:46:22,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2021-11-20 06:46:22,517 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:46:22,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:46:22,518 INFO L85 PathProgramCache]: Analyzing trace with hash 515468321, now seen corresponding path program 1 times [2021-11-20 06:46:22,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:46:22,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94382839] [2021-11-20 06:46:22,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:46:22,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:46:22,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:46:22,568 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 06:46:22,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:46:22,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94382839] [2021-11-20 06:46:22,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94382839] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:46:22,569 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:46:22,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:46:22,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589683154] [2021-11-20 06:46:22,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:46:22,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:46:22,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:46:22,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:46:22,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:46:22,570 INFO L87 Difference]: Start difference. First operand 424 states and 626 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 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 06:46:23,656 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 06:46:23,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:46:23,959 INFO L93 Difference]: Finished difference Result 893 states and 1329 transitions. [2021-11-20 06:46:23,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:46:23,959 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 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 06:46:23,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:46:23,960 INFO L225 Difference]: With dead ends: 893 [2021-11-20 06:46:23,960 INFO L226 Difference]: Without dead ends: 490 [2021-11-20 06:46:23,961 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 06:46:23,961 INFO L933 BasicCegarLoop]: 263 mSDtfsCounter, 56 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 637 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:46:23,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 637 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-20 06:46:23,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-11-20 06:46:23,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 454. [2021-11-20 06:46:23,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 1.4988962472406182) internal successors, (679), 453 states have internal predecessors, (679), 0 states have call successors, (0), 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 06:46:23,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 679 transitions. [2021-11-20 06:46:23,978 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 679 transitions. Word has length 159 [2021-11-20 06:46:23,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:46:23,978 INFO L470 AbstractCegarLoop]: Abstraction has 454 states and 679 transitions. [2021-11-20 06:46:23,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 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 06:46:23,978 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 679 transitions. [2021-11-20 06:46:23,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-20 06:46:23,980 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:46:23,980 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-20 06:46:23,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2021-11-20 06:46:23,980 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:46:23,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:46:23,981 INFO L85 PathProgramCache]: Analyzing trace with hash -735631639, now seen corresponding path program 1 times [2021-11-20 06:46:23,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:46:23,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488222873] [2021-11-20 06:46:23,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:46:23,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:46:23,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:46:24,029 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 156 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-20 06:46:24,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:46:24,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488222873] [2021-11-20 06:46:24,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488222873] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:46:24,029 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:46:24,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:46:24,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779170195] [2021-11-20 06:46:24,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:46:24,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:46:24,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:46:24,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:46:24,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:46:24,031 INFO L87 Difference]: Start difference. First operand 454 states and 679 transitions. Second operand has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 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 06:46:26,039 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 06:46:26,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:46:26,351 INFO L93 Difference]: Finished difference Result 916 states and 1374 transitions. [2021-11-20 06:46:26,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:46:26,352 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 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 06:46:26,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:46:26,352 INFO L225 Difference]: With dead ends: 916 [2021-11-20 06:46:26,352 INFO L226 Difference]: Without dead ends: 483 [2021-11-20 06:46:26,353 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 06:46:26,353 INFO L933 BasicCegarLoop]: 260 mSDtfsCounter, 52 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 630 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:46:26,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 630 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 216 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 06:46:26,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-11-20 06:46:26,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 416. [2021-11-20 06:46:26,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 415 states have (on average 1.5012048192771084) internal successors, (623), 415 states have internal predecessors, (623), 0 states have call successors, (0), 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 06:46:26,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 623 transitions. [2021-11-20 06:46:26,371 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 623 transitions. Word has length 160 [2021-11-20 06:46:26,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:46:26,371 INFO L470 AbstractCegarLoop]: Abstraction has 416 states and 623 transitions. [2021-11-20 06:46:26,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 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 06:46:26,371 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 623 transitions. [2021-11-20 06:46:26,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-11-20 06:46:26,372 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:46:26,372 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 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] [2021-11-20 06:46:26,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2021-11-20 06:46:26,372 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:46:26,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:46:26,373 INFO L85 PathProgramCache]: Analyzing trace with hash -2024418791, now seen corresponding path program 1 times [2021-11-20 06:46:26,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:46:26,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964043777] [2021-11-20 06:46:26,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:46:26,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:46:26,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:46:26,426 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 177 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-20 06:46:26,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:46:26,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964043777] [2021-11-20 06:46:26,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964043777] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:46:26,426 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:46:26,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:46:26,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406513251] [2021-11-20 06:46:26,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:46:26,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:46:26,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:46:26,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:46:26,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:46:26,428 INFO L87 Difference]: Start difference. First operand 416 states and 623 transitions. Second operand has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 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 06:46:28,433 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:46:28,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:46:28,701 INFO L93 Difference]: Finished difference Result 878 states and 1317 transitions. [2021-11-20 06:46:28,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:46:28,701 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 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 06:46:28,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:46:28,702 INFO L225 Difference]: With dead ends: 878 [2021-11-20 06:46:28,702 INFO L226 Difference]: Without dead ends: 483 [2021-11-20 06:46:28,703 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 06:46:28,703 INFO L933 BasicCegarLoop]: 238 mSDtfsCounter, 59 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:46:28,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 587 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 214 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-11-20 06:46:28,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-11-20 06:46:28,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 446. [2021-11-20 06:46:28,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 445 states have (on average 1.501123595505618) internal successors, (668), 445 states have internal predecessors, (668), 0 states have call successors, (0), 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 06:46:28,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 668 transitions. [2021-11-20 06:46:28,737 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 668 transitions. Word has length 162 [2021-11-20 06:46:28,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:46:28,737 INFO L470 AbstractCegarLoop]: Abstraction has 446 states and 668 transitions. [2021-11-20 06:46:28,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 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 06:46:28,738 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 668 transitions. [2021-11-20 06:46:28,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-11-20 06:46:28,738 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:46:28,738 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 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 06:46:28,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2021-11-20 06:46:28,738 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:46:28,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:46:28,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1524675378, now seen corresponding path program 1 times [2021-11-20 06:46:28,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:46:28,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448355277] [2021-11-20 06:46:28,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:46:28,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:46:28,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:46:28,788 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 152 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-11-20 06:46:28,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:46:28,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448355277] [2021-11-20 06:46:28,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448355277] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:46:28,789 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:46:28,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:46:28,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142396322] [2021-11-20 06:46:28,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:46:28,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:46:28,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:46:28,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:46:28,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:46:28,790 INFO L87 Difference]: Start difference. First operand 446 states and 668 transitions. Second operand has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 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 06:46:30,796 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:46:31,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:46:31,058 INFO L93 Difference]: Finished difference Result 895 states and 1345 transitions. [2021-11-20 06:46:31,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:46:31,059 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 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 06:46:31,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:46:31,060 INFO L225 Difference]: With dead ends: 895 [2021-11-20 06:46:31,060 INFO L226 Difference]: Without dead ends: 470 [2021-11-20 06:46:31,060 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 06:46:31,060 INFO L933 BasicCegarLoop]: 233 mSDtfsCounter, 53 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:46:31,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 577 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 197 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-11-20 06:46:31,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-11-20 06:46:31,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 446. [2021-11-20 06:46:31,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 445 states have (on average 1.498876404494382) internal successors, (667), 445 states have internal predecessors, (667), 0 states have call successors, (0), 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 06:46:31,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 667 transitions. [2021-11-20 06:46:31,079 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 667 transitions. Word has length 162 [2021-11-20 06:46:31,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:46:31,079 INFO L470 AbstractCegarLoop]: Abstraction has 446 states and 667 transitions. [2021-11-20 06:46:31,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 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 06:46:31,079 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 667 transitions. [2021-11-20 06:46:31,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-11-20 06:46:31,080 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:46:31,080 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 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, 1, 1, 1, 1] [2021-11-20 06:46:31,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2021-11-20 06:46:31,080 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:46:31,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:46:31,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1131869759, now seen corresponding path program 1 times [2021-11-20 06:46:31,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:46:31,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142088870] [2021-11-20 06:46:31,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:46:31,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:46:31,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:46:31,134 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 178 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-20 06:46:31,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:46:31,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142088870] [2021-11-20 06:46:31,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142088870] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:46:31,135 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:46:31,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:46:31,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665046521] [2021-11-20 06:46:31,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:46:31,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:46:31,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:46:31,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:46:31,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:46:31,135 INFO L87 Difference]: Start difference. First operand 446 states and 667 transitions. Second operand has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 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 06:46:32,928 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:46:33,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:46:33,249 INFO L93 Difference]: Finished difference Result 906 states and 1357 transitions. [2021-11-20 06:46:33,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:46:33,250 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 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 163 [2021-11-20 06:46:33,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:46:33,250 INFO L225 Difference]: With dead ends: 906 [2021-11-20 06:46:33,250 INFO L226 Difference]: Without dead ends: 481 [2021-11-20 06:46:33,251 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 06:46:33,251 INFO L933 BasicCegarLoop]: 239 mSDtfsCounter, 56 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:46:33,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 589 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-20 06:46:33,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-11-20 06:46:33,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 447. [2021-11-20 06:46:33,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 446 states have (on average 1.4977578475336324) internal successors, (668), 446 states have internal predecessors, (668), 0 states have call successors, (0), 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 06:46:33,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 668 transitions. [2021-11-20 06:46:33,270 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 668 transitions. Word has length 163 [2021-11-20 06:46:33,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:46:33,270 INFO L470 AbstractCegarLoop]: Abstraction has 447 states and 668 transitions. [2021-11-20 06:46:33,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 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 06:46:33,270 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 668 transitions. [2021-11-20 06:46:33,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-11-20 06:46:33,271 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:46:33,271 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, 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] [2021-11-20 06:46:33,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2021-11-20 06:46:33,271 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:46:33,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:46:33,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1761831921, now seen corresponding path program 1 times [2021-11-20 06:46:33,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:46:33,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636935709] [2021-11-20 06:46:33,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:46:33,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:46:33,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:46:33,317 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 173 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-20 06:46:33,317 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:46:33,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636935709] [2021-11-20 06:46:33,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636935709] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:46:33,318 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:46:33,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:46:33,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68666532] [2021-11-20 06:46:33,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:46:33,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:46:33,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:46:33,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:46:33,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:46:33,320 INFO L87 Difference]: Start difference. First operand 447 states and 668 transitions. Second operand has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 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 06:46:33,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:46:33,413 INFO L93 Difference]: Finished difference Result 1259 states and 1893 transitions. [2021-11-20 06:46:33,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:46:33,413 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 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 163 [2021-11-20 06:46:33,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:46:33,415 INFO L225 Difference]: With dead ends: 1259 [2021-11-20 06:46:33,415 INFO L226 Difference]: Without dead ends: 833 [2021-11-20 06:46:33,415 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 06:46:33,415 INFO L933 BasicCegarLoop]: 249 mSDtfsCounter, 131 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:46:33,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 438 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:46:33,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 833 states. [2021-11-20 06:46:33,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 833 to 831. [2021-11-20 06:46:33,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 830 states have (on average 1.4927710843373494) internal successors, (1239), 830 states have internal predecessors, (1239), 0 states have call successors, (0), 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 06:46:33,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 1239 transitions. [2021-11-20 06:46:33,462 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 1239 transitions. Word has length 163 [2021-11-20 06:46:33,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:46:33,462 INFO L470 AbstractCegarLoop]: Abstraction has 831 states and 1239 transitions. [2021-11-20 06:46:33,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 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 06:46:33,463 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 1239 transitions. [2021-11-20 06:46:33,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-11-20 06:46:33,463 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:46:33,464 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 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 06:46:33,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2021-11-20 06:46:33,464 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:46:33,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:46:33,464 INFO L85 PathProgramCache]: Analyzing trace with hash -620268122, now seen corresponding path program 1 times [2021-11-20 06:46:33,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:46:33,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485817289] [2021-11-20 06:46:33,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:46:33,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:46:33,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:46:33,517 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 157 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-11-20 06:46:33,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:46:33,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485817289] [2021-11-20 06:46:33,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485817289] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:46:33,517 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:46:33,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:46:33,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234471307] [2021-11-20 06:46:33,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:46:33,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:46:33,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:46:33,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:46:33,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:46:33,519 INFO L87 Difference]: Start difference. First operand 831 states and 1239 transitions. Second operand has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 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 06:46:35,531 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 06:46:35,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:46:35,807 INFO L93 Difference]: Finished difference Result 1685 states and 2515 transitions. [2021-11-20 06:46:35,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:46:35,807 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 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 163 [2021-11-20 06:46:35,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:46:35,809 INFO L225 Difference]: With dead ends: 1685 [2021-11-20 06:46:35,809 INFO L226 Difference]: Without dead ends: 875 [2021-11-20 06:46:35,809 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 06:46:35,809 INFO L933 BasicCegarLoop]: 235 mSDtfsCounter, 51 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:46:35,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 581 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 193 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-11-20 06:46:35,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2021-11-20 06:46:35,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 831. [2021-11-20 06:46:35,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 830 states have (on average 1.4903614457831325) internal successors, (1237), 830 states have internal predecessors, (1237), 0 states have call successors, (0), 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 06:46:35,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 1237 transitions. [2021-11-20 06:46:35,854 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 1237 transitions. Word has length 163 [2021-11-20 06:46:35,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:46:35,854 INFO L470 AbstractCegarLoop]: Abstraction has 831 states and 1237 transitions. [2021-11-20 06:46:35,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 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 06:46:35,854 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 1237 transitions. [2021-11-20 06:46:35,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-11-20 06:46:35,855 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:46:35,855 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, 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] [2021-11-20 06:46:35,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2021-11-20 06:46:35,855 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:46:35,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:46:35,855 INFO L85 PathProgramCache]: Analyzing trace with hash 482726477, now seen corresponding path program 1 times [2021-11-20 06:46:35,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:46:35,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024771607] [2021-11-20 06:46:35,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:46:35,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:46:35,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:46:35,914 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 118 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-11-20 06:46:35,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:46:35,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024771607] [2021-11-20 06:46:35,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024771607] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:46:35,914 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:46:35,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:46:35,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129527547] [2021-11-20 06:46:35,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:46:35,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:46:35,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:46:35,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:46:35,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:46:35,916 INFO L87 Difference]: Start difference. First operand 831 states and 1237 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 0 states have call successors, (0), 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 06:46:35,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:46:35,979 INFO L93 Difference]: Finished difference Result 1668 states and 2486 transitions. [2021-11-20 06:46:35,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:46:35,979 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 0 states have call successors, (0), 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 163 [2021-11-20 06:46:35,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:46:35,980 INFO L225 Difference]: With dead ends: 1668 [2021-11-20 06:46:35,981 INFO L226 Difference]: Without dead ends: 858 [2021-11-20 06:46:35,981 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 06:46:35,981 INFO L933 BasicCegarLoop]: 227 mSDtfsCounter, 15 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:46:35,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 416 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:46:35,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 858 states. [2021-11-20 06:46:36,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 858 to 858. [2021-11-20 06:46:36,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 857 states have (on average 1.4842473745624272) internal successors, (1272), 857 states have internal predecessors, (1272), 0 states have call successors, (0), 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 06:46:36,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 1272 transitions. [2021-11-20 06:46:36,021 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 1272 transitions. Word has length 163 [2021-11-20 06:46:36,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:46:36,021 INFO L470 AbstractCegarLoop]: Abstraction has 858 states and 1272 transitions. [2021-11-20 06:46:36,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 0 states have call successors, (0), 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 06:46:36,021 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 1272 transitions. [2021-11-20 06:46:36,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-11-20 06:46:36,023 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:46:36,023 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, 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] [2021-11-20 06:46:36,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2021-11-20 06:46:36,023 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:46:36,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:46:36,024 INFO L85 PathProgramCache]: Analyzing trace with hash -57703029, now seen corresponding path program 1 times [2021-11-20 06:46:36,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:46:36,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210696231] [2021-11-20 06:46:36,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:46:36,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:46:36,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:46:36,066 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2021-11-20 06:46:36,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:46:36,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210696231] [2021-11-20 06:46:36,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210696231] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:46:36,067 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:46:36,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:46:36,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261657367] [2021-11-20 06:46:36,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:46:36,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:46:36,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:46:36,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:46:36,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:46:36,068 INFO L87 Difference]: Start difference. First operand 858 states and 1272 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 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 06:46:36,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:46:36,126 INFO L93 Difference]: Finished difference Result 1697 states and 2522 transitions. [2021-11-20 06:46:36,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:46:36,127 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 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 163 [2021-11-20 06:46:36,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:46:36,128 INFO L225 Difference]: With dead ends: 1697 [2021-11-20 06:46:36,128 INFO L226 Difference]: Without dead ends: 860 [2021-11-20 06:46:36,129 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 06:46:36,129 INFO L933 BasicCegarLoop]: 215 mSDtfsCounter, 4 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:46:36,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 395 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:46:36,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2021-11-20 06:46:36,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 860. [2021-11-20 06:46:36,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 859 states have (on average 1.4831199068684517) internal successors, (1274), 859 states have internal predecessors, (1274), 0 states have call successors, (0), 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 06:46:36,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 1274 transitions. [2021-11-20 06:46:36,169 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 1274 transitions. Word has length 163 [2021-11-20 06:46:36,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:46:36,169 INFO L470 AbstractCegarLoop]: Abstraction has 860 states and 1274 transitions. [2021-11-20 06:46:36,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 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 06:46:36,169 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 1274 transitions. [2021-11-20 06:46:36,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-20 06:46:36,170 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:46:36,170 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] [2021-11-20 06:46:36,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2021-11-20 06:46:36,170 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:46:36,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:46:36,170 INFO L85 PathProgramCache]: Analyzing trace with hash 210608348, now seen corresponding path program 1 times [2021-11-20 06:46:36,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:46:36,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435399948] [2021-11-20 06:46:36,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:46:36,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:46:36,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:46:36,326 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 06:46:36,326 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:46:36,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435399948] [2021-11-20 06:46:36,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435399948] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:46:36,327 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:46:36,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 06:46:36,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400096026] [2021-11-20 06:46:36,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:46:36,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:46:36,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:46:36,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:46:36,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:46:36,328 INFO L87 Difference]: Start difference. First operand 860 states and 1274 transitions. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 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 06:46:38,337 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 06:46:40,361 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 06:46:40,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:46:40,892 INFO L93 Difference]: Finished difference Result 1850 states and 2754 transitions. [2021-11-20 06:46:40,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:46:40,893 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 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 164 [2021-11-20 06:46:40,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:46:40,894 INFO L225 Difference]: With dead ends: 1850 [2021-11-20 06:46:40,895 INFO L226 Difference]: Without dead ends: 1013 [2021-11-20 06:46:40,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:46:40,896 INFO L933 BasicCegarLoop]: 235 mSDtfsCounter, 65 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 18 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 732 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:46:40,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 732 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 386 Invalid, 2 Unknown, 0 Unchecked, 4.5s Time] [2021-11-20 06:46:40,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2021-11-20 06:46:40,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 926. [2021-11-20 06:46:40,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 925 states have (on average 1.5048648648648648) internal successors, (1392), 925 states have internal predecessors, (1392), 0 states have call successors, (0), 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 06:46:40,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 1392 transitions. [2021-11-20 06:46:40,975 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 1392 transitions. Word has length 164 [2021-11-20 06:46:40,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:46:40,976 INFO L470 AbstractCegarLoop]: Abstraction has 926 states and 1392 transitions. [2021-11-20 06:46:40,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 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 06:46:40,976 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 1392 transitions. [2021-11-20 06:46:40,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-11-20 06:46:40,977 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:46:40,978 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, 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] [2021-11-20 06:46:40,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2021-11-20 06:46:40,978 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:46:40,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:46:40,979 INFO L85 PathProgramCache]: Analyzing trace with hash -543680962, now seen corresponding path program 1 times [2021-11-20 06:46:40,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:46:40,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166158855] [2021-11-20 06:46:40,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:46:40,979 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:46:41,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:46:41,065 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-20 06:46:41,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:46:41,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166158855] [2021-11-20 06:46:41,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166158855] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:46:41,066 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:46:41,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:46:41,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601839763] [2021-11-20 06:46:41,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:46:41,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:46:41,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:46:41,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:46:41,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:46:41,068 INFO L87 Difference]: Start difference. First operand 926 states and 1392 transitions. Second operand has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 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 06:46:43,075 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 06:46:43,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:46:43,382 INFO L93 Difference]: Finished difference Result 1889 states and 2835 transitions. [2021-11-20 06:46:43,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:46:43,382 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 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 166 [2021-11-20 06:46:43,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:46:43,384 INFO L225 Difference]: With dead ends: 1889 [2021-11-20 06:46:43,384 INFO L226 Difference]: Without dead ends: 986 [2021-11-20 06:46:43,384 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 06:46:43,384 INFO L933 BasicCegarLoop]: 243 mSDtfsCounter, 43 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 599 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:46:43,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 599 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 211 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-11-20 06:46:43,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 986 states. [2021-11-20 06:46:43,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 986 to 941. [2021-11-20 06:46:43,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 941 states, 940 states have (on average 1.501063829787234) internal successors, (1411), 940 states have internal predecessors, (1411), 0 states have call successors, (0), 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 06:46:43,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 941 states to 941 states and 1411 transitions. [2021-11-20 06:46:43,435 INFO L78 Accepts]: Start accepts. Automaton has 941 states and 1411 transitions. Word has length 166 [2021-11-20 06:46:43,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:46:43,435 INFO L470 AbstractCegarLoop]: Abstraction has 941 states and 1411 transitions. [2021-11-20 06:46:43,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 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 06:46:43,436 INFO L276 IsEmpty]: Start isEmpty. Operand 941 states and 1411 transitions. [2021-11-20 06:46:43,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-11-20 06:46:43,436 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:46:43,437 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 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] [2021-11-20 06:46:43,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2021-11-20 06:46:43,437 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:46:43,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:46:43,437 INFO L85 PathProgramCache]: Analyzing trace with hash 316583503, now seen corresponding path program 1 times [2021-11-20 06:46:43,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:46:43,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838450091] [2021-11-20 06:46:43,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:46:43,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:46:43,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:46:43,504 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 165 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-20 06:46:43,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:46:43,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838450091] [2021-11-20 06:46:43,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838450091] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:46:43,504 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:46:43,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:46:43,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541022479] [2021-11-20 06:46:43,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:46:43,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:46:43,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:46:43,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:46:43,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:46:43,506 INFO L87 Difference]: Start difference. First operand 941 states and 1411 transitions. Second operand has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 0 states have call successors, (0), 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 06:46:45,512 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:46:45,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:46:45,829 INFO L93 Difference]: Finished difference Result 1889 states and 2838 transitions. [2021-11-20 06:46:45,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:46:45,830 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 0 states have call successors, (0), 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 167 [2021-11-20 06:46:45,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:46:45,831 INFO L225 Difference]: With dead ends: 1889 [2021-11-20 06:46:45,831 INFO L226 Difference]: Without dead ends: 971 [2021-11-20 06:46:45,832 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 06:46:45,832 INFO L933 BasicCegarLoop]: 251 mSDtfsCounter, 59 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 612 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:46:45,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 612 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 215 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 06:46:45,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2021-11-20 06:46:45,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 941. [2021-11-20 06:46:45,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 941 states, 940 states have (on average 1.5) internal successors, (1410), 940 states have internal predecessors, (1410), 0 states have call successors, (0), 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 06:46:45,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 941 states to 941 states and 1410 transitions. [2021-11-20 06:46:45,884 INFO L78 Accepts]: Start accepts. Automaton has 941 states and 1410 transitions. Word has length 167 [2021-11-20 06:46:45,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:46:45,884 INFO L470 AbstractCegarLoop]: Abstraction has 941 states and 1410 transitions. [2021-11-20 06:46:45,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 0 states have call successors, (0), 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 06:46:45,884 INFO L276 IsEmpty]: Start isEmpty. Operand 941 states and 1410 transitions. [2021-11-20 06:46:45,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-11-20 06:46:45,886 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:46:45,886 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, 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] [2021-11-20 06:46:45,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2021-11-20 06:46:45,886 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:46:45,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:46:45,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1762201345, now seen corresponding path program 1 times [2021-11-20 06:46:45,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:46:45,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685986644] [2021-11-20 06:46:45,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:46:45,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:46:45,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:46:45,953 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-20 06:46:45,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:46:45,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685986644] [2021-11-20 06:46:45,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685986644] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:46:45,954 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:46:45,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:46:45,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567562891] [2021-11-20 06:46:45,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:46:45,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:46:45,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:46:45,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:46:45,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:46:45,955 INFO L87 Difference]: Start difference. First operand 941 states and 1410 transitions. Second operand has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 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 06:46:47,511 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:46:47,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:46:47,805 INFO L93 Difference]: Finished difference Result 1892 states and 2834 transitions. [2021-11-20 06:46:47,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:46:47,805 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 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 167 [2021-11-20 06:46:47,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:46:47,807 INFO L225 Difference]: With dead ends: 1892 [2021-11-20 06:46:47,808 INFO L226 Difference]: Without dead ends: 970 [2021-11-20 06:46:47,808 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 06:46:47,809 INFO L933 BasicCegarLoop]: 240 mSDtfsCounter, 33 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-20 06:46:47,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 593 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-20 06:46:47,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2021-11-20 06:46:47,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 939. [2021-11-20 06:46:47,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 939 states, 938 states have (on average 1.4989339019189765) internal successors, (1406), 938 states have internal predecessors, (1406), 0 states have call successors, (0), 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 06:46:47,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 939 states to 939 states and 1406 transitions. [2021-11-20 06:46:47,877 INFO L78 Accepts]: Start accepts. Automaton has 939 states and 1406 transitions. Word has length 167 [2021-11-20 06:46:47,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:46:47,877 INFO L470 AbstractCegarLoop]: Abstraction has 939 states and 1406 transitions. [2021-11-20 06:46:47,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 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 06:46:47,878 INFO L276 IsEmpty]: Start isEmpty. Operand 939 states and 1406 transitions. [2021-11-20 06:46:47,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-20 06:46:47,879 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:46:47,879 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 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] [2021-11-20 06:46:47,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2021-11-20 06:46:47,880 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:46:47,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:46:47,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1575242677, now seen corresponding path program 1 times [2021-11-20 06:46:47,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:46:47,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477031243] [2021-11-20 06:46:47,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:46:47,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:46:47,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:46:47,946 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 167 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-20 06:46:47,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:46:47,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477031243] [2021-11-20 06:46:47,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477031243] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:46:47,947 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:46:47,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:46:47,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558794195] [2021-11-20 06:46:47,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:46:47,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:46:47,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:46:47,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:46:47,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:46:47,949 INFO L87 Difference]: Start difference. First operand 939 states and 1406 transitions. Second operand has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 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 06:46:49,313 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:46:49,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:46:49,603 INFO L93 Difference]: Finished difference Result 1883 states and 2826 transitions. [2021-11-20 06:46:49,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:46:49,603 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 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 168 [2021-11-20 06:46:49,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:46:49,607 INFO L225 Difference]: With dead ends: 1883 [2021-11-20 06:46:49,607 INFO L226 Difference]: Without dead ends: 967 [2021-11-20 06:46:49,608 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 06:46:49,608 INFO L933 BasicCegarLoop]: 243 mSDtfsCounter, 56 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:46:49,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 596 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-20 06:46:49,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2021-11-20 06:46:49,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 939. [2021-11-20 06:46:49,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 939 states, 938 states have (on average 1.4978678038379531) internal successors, (1405), 938 states have internal predecessors, (1405), 0 states have call successors, (0), 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 06:46:49,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 939 states to 939 states and 1405 transitions. [2021-11-20 06:46:49,676 INFO L78 Accepts]: Start accepts. Automaton has 939 states and 1405 transitions. Word has length 168 [2021-11-20 06:46:49,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:46:49,677 INFO L470 AbstractCegarLoop]: Abstraction has 939 states and 1405 transitions. [2021-11-20 06:46:49,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 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 06:46:49,677 INFO L276 IsEmpty]: Start isEmpty. Operand 939 states and 1405 transitions. [2021-11-20 06:46:49,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-20 06:46:49,678 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:46:49,679 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-20 06:46:49,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2021-11-20 06:46:49,679 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:46:49,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:46:49,679 INFO L85 PathProgramCache]: Analyzing trace with hash 2089762457, now seen corresponding path program 1 times [2021-11-20 06:46:49,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:46:49,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086556022] [2021-11-20 06:46:49,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:46:49,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:46:49,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:46:49,741 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 96 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-11-20 06:46:49,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:46:49,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086556022] [2021-11-20 06:46:49,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086556022] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:46:49,742 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:46:49,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:46:49,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861719884] [2021-11-20 06:46:49,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:46:49,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:46:49,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:46:49,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:46:49,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:46:49,743 INFO L87 Difference]: Start difference. First operand 939 states and 1405 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 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 06:46:49,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:46:49,895 INFO L93 Difference]: Finished difference Result 2317 states and 3484 transitions. [2021-11-20 06:46:49,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:46:49,896 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 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 168 [2021-11-20 06:46:49,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:46:49,898 INFO L225 Difference]: With dead ends: 2317 [2021-11-20 06:46:49,898 INFO L226 Difference]: Without dead ends: 1401 [2021-11-20 06:46:49,899 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 06:46:49,900 INFO L933 BasicCegarLoop]: 370 mSDtfsCounter, 143 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 559 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:46:49,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 559 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:46:49,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1401 states. [2021-11-20 06:46:49,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1401 to 1401. [2021-11-20 06:46:49,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1401 states, 1400 states have (on average 1.4964285714285714) internal successors, (2095), 1400 states have internal predecessors, (2095), 0 states have call successors, (0), 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 06:46:49,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1401 states to 1401 states and 2095 transitions. [2021-11-20 06:46:49,999 INFO L78 Accepts]: Start accepts. Automaton has 1401 states and 2095 transitions. Word has length 168 [2021-11-20 06:46:49,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:46:49,999 INFO L470 AbstractCegarLoop]: Abstraction has 1401 states and 2095 transitions. [2021-11-20 06:46:49,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 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 06:46:49,999 INFO L276 IsEmpty]: Start isEmpty. Operand 1401 states and 2095 transitions. [2021-11-20 06:46:50,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-11-20 06:46:50,001 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:46:50,001 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-20 06:46:50,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2021-11-20 06:46:50,002 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:46:50,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:46:50,002 INFO L85 PathProgramCache]: Analyzing trace with hash 915392013, now seen corresponding path program 1 times [2021-11-20 06:46:50,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:46:50,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889266759] [2021-11-20 06:46:50,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:46:50,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:46:50,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:46:50,070 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 160 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-20 06:46:50,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:46:50,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889266759] [2021-11-20 06:46:50,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889266759] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:46:50,071 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:46:50,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:46:50,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439231962] [2021-11-20 06:46:50,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:46:50,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:46:50,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:46:50,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:46:50,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:46:50,072 INFO L87 Difference]: Start difference. First operand 1401 states and 2095 transitions. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 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 06:46:50,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:46:50,252 INFO L93 Difference]: Finished difference Result 3239 states and 4859 transitions. [2021-11-20 06:46:50,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:46:50,252 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 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 169 [2021-11-20 06:46:50,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:46:50,256 INFO L225 Difference]: With dead ends: 3239 [2021-11-20 06:46:50,256 INFO L226 Difference]: Without dead ends: 1861 [2021-11-20 06:46:50,257 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 06:46:50,258 INFO L933 BasicCegarLoop]: 372 mSDtfsCounter, 136 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:46:50,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 561 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:46:50,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1861 states. [2021-11-20 06:46:50,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1861 to 1855. [2021-11-20 06:46:50,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1855 states, 1854 states have (on average 1.4973031283710896) internal successors, (2776), 1854 states have internal predecessors, (2776), 0 states have call successors, (0), 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 06:46:50,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1855 states to 1855 states and 2776 transitions. [2021-11-20 06:46:50,410 INFO L78 Accepts]: Start accepts. Automaton has 1855 states and 2776 transitions. Word has length 169 [2021-11-20 06:46:50,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:46:50,410 INFO L470 AbstractCegarLoop]: Abstraction has 1855 states and 2776 transitions. [2021-11-20 06:46:50,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 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 06:46:50,410 INFO L276 IsEmpty]: Start isEmpty. Operand 1855 states and 2776 transitions. [2021-11-20 06:46:50,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-11-20 06:46:50,412 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:46:50,412 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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 06:46:50,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2021-11-20 06:46:50,413 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:46:50,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:46:50,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1687079371, now seen corresponding path program 1 times [2021-11-20 06:46:50,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:46:50,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729610851] [2021-11-20 06:46:50,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:46:50,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:46:50,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:46:50,480 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2021-11-20 06:46:50,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:46:50,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729610851] [2021-11-20 06:46:50,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729610851] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:46:50,481 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:46:50,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:46:50,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503416056] [2021-11-20 06:46:50,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:46:50,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:46:50,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:46:50,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:46:50,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:46:50,482 INFO L87 Difference]: Start difference. First operand 1855 states and 2776 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 06:46:52,389 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:46:52,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:46:52,789 INFO L93 Difference]: Finished difference Result 3832 states and 5712 transitions. [2021-11-20 06:46:52,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:46:52,789 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 174 [2021-11-20 06:46:52,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:46:52,792 INFO L225 Difference]: With dead ends: 3832 [2021-11-20 06:46:52,792 INFO L226 Difference]: Without dead ends: 2000 [2021-11-20 06:46:52,792 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 06:46:52,793 INFO L933 BasicCegarLoop]: 240 mSDtfsCounter, 73 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:46:52,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 591 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-20 06:46:52,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2000 states. [2021-11-20 06:46:52,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2000 to 1855. [2021-11-20 06:46:52,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1855 states, 1854 states have (on average 1.4951456310679612) internal successors, (2772), 1854 states have internal predecessors, (2772), 0 states have call successors, (0), 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 06:46:52,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1855 states to 1855 states and 2772 transitions. [2021-11-20 06:46:52,952 INFO L78 Accepts]: Start accepts. Automaton has 1855 states and 2772 transitions. Word has length 174 [2021-11-20 06:46:52,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:46:52,952 INFO L470 AbstractCegarLoop]: Abstraction has 1855 states and 2772 transitions. [2021-11-20 06:46:52,952 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 06:46:52,952 INFO L276 IsEmpty]: Start isEmpty. Operand 1855 states and 2772 transitions. [2021-11-20 06:46:52,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-11-20 06:46:52,954 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:46:52,954 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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 06:46:52,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2021-11-20 06:46:52,954 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:46:52,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:46:52,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1754206321, now seen corresponding path program 1 times [2021-11-20 06:46:52,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:46:52,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863012101] [2021-11-20 06:46:52,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:46:52,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:46:52,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:46:53,023 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2021-11-20 06:46:53,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:46:53,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863012101] [2021-11-20 06:46:53,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863012101] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:46:53,024 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:46:53,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:46:53,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101558603] [2021-11-20 06:46:53,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:46:53,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:46:53,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:46:53,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:46:53,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:46:53,025 INFO L87 Difference]: Start difference. First operand 1855 states and 2772 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 06:46:55,040 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 06:46:55,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:46:55,468 INFO L93 Difference]: Finished difference Result 3832 states and 5704 transitions. [2021-11-20 06:46:55,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:46:55,469 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 175 [2021-11-20 06:46:55,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:46:55,473 INFO L225 Difference]: With dead ends: 3832 [2021-11-20 06:46:55,473 INFO L226 Difference]: Without dead ends: 2000 [2021-11-20 06:46:55,474 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 06:46:55,475 INFO L933 BasicCegarLoop]: 240 mSDtfsCounter, 71 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 10 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:46:55,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 591 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 214 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 06:46:55,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2000 states. [2021-11-20 06:46:55,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2000 to 1855. [2021-11-20 06:46:55,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1855 states, 1854 states have (on average 1.4929881337648327) internal successors, (2768), 1854 states have internal predecessors, (2768), 0 states have call successors, (0), 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 06:46:55,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1855 states to 1855 states and 2768 transitions. [2021-11-20 06:46:55,633 INFO L78 Accepts]: Start accepts. Automaton has 1855 states and 2768 transitions. Word has length 175 [2021-11-20 06:46:55,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:46:55,633 INFO L470 AbstractCegarLoop]: Abstraction has 1855 states and 2768 transitions. [2021-11-20 06:46:55,633 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 06:46:55,633 INFO L276 IsEmpty]: Start isEmpty. Operand 1855 states and 2768 transitions. [2021-11-20 06:46:55,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-11-20 06:46:55,635 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:46:55,635 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 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 06:46:55,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2021-11-20 06:46:55,636 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:46:55,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:46:55,636 INFO L85 PathProgramCache]: Analyzing trace with hash 93112294, now seen corresponding path program 1 times [2021-11-20 06:46:55,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:46:55,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346983408] [2021-11-20 06:46:55,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:46:55,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:46:55,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:46:55,707 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 142 proven. 0 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2021-11-20 06:46:55,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:46:55,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346983408] [2021-11-20 06:46:55,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346983408] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:46:55,707 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:46:55,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:46:55,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245664974] [2021-11-20 06:46:55,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:46:55,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:46:55,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:46:55,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:46:55,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:46:55,709 INFO L87 Difference]: Start difference. First operand 1855 states and 2768 transitions. Second operand has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 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 06:46:56,715 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:46:57,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:46:57,109 INFO L93 Difference]: Finished difference Result 3832 states and 5696 transitions. [2021-11-20 06:46:57,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:46:57,110 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 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 176 [2021-11-20 06:46:57,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:46:57,112 INFO L225 Difference]: With dead ends: 3832 [2021-11-20 06:46:57,112 INFO L226 Difference]: Without dead ends: 2000 [2021-11-20 06:46:57,112 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 06:46:57,113 INFO L933 BasicCegarLoop]: 240 mSDtfsCounter, 69 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:46:57,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 591 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-20 06:46:57,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2000 states. [2021-11-20 06:46:57,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2000 to 1855. [2021-11-20 06:46:57,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1855 states, 1854 states have (on average 1.4908306364617043) internal successors, (2764), 1854 states have internal predecessors, (2764), 0 states have call successors, (0), 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 06:46:57,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1855 states to 1855 states and 2764 transitions. [2021-11-20 06:46:57,264 INFO L78 Accepts]: Start accepts. Automaton has 1855 states and 2764 transitions. Word has length 176 [2021-11-20 06:46:57,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:46:57,265 INFO L470 AbstractCegarLoop]: Abstraction has 1855 states and 2764 transitions. [2021-11-20 06:46:57,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 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 06:46:57,265 INFO L276 IsEmpty]: Start isEmpty. Operand 1855 states and 2764 transitions. [2021-11-20 06:46:57,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-11-20 06:46:57,266 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:46:57,267 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 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 06:46:57,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2021-11-20 06:46:57,267 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:46:57,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:46:57,267 INFO L85 PathProgramCache]: Analyzing trace with hash 691742828, now seen corresponding path program 1 times [2021-11-20 06:46:57,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:46:57,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960817105] [2021-11-20 06:46:57,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:46:57,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:46:57,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:46:57,344 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 148 proven. 0 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2021-11-20 06:46:57,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:46:57,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960817105] [2021-11-20 06:46:57,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960817105] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:46:57,345 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:46:57,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:46:57,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432797705] [2021-11-20 06:46:57,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:46:57,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:46:57,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:46:57,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:46:57,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:46:57,347 INFO L87 Difference]: Start difference. First operand 1855 states and 2764 transitions. Second operand has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 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 06:46:59,355 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 06:46:59,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:46:59,751 INFO L93 Difference]: Finished difference Result 3792 states and 5640 transitions. [2021-11-20 06:46:59,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:46:59,752 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 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 177 [2021-11-20 06:46:59,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:46:59,753 INFO L225 Difference]: With dead ends: 3792 [2021-11-20 06:46:59,754 INFO L226 Difference]: Without dead ends: 1960 [2021-11-20 06:46:59,754 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 06:46:59,754 INFO L933 BasicCegarLoop]: 246 mSDtfsCounter, 60 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 603 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:46:59,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 603 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 202 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 06:46:59,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1960 states. [2021-11-20 06:46:59,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1960 to 1855. [2021-11-20 06:46:59,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1855 states, 1854 states have (on average 1.4886731391585761) internal successors, (2760), 1854 states have internal predecessors, (2760), 0 states have call successors, (0), 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 06:46:59,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1855 states to 1855 states and 2760 transitions. [2021-11-20 06:46:59,837 INFO L78 Accepts]: Start accepts. Automaton has 1855 states and 2760 transitions. Word has length 177 [2021-11-20 06:46:59,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:46:59,837 INFO L470 AbstractCegarLoop]: Abstraction has 1855 states and 2760 transitions. [2021-11-20 06:46:59,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 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 06:46:59,837 INFO L276 IsEmpty]: Start isEmpty. Operand 1855 states and 2760 transitions. [2021-11-20 06:46:59,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-11-20 06:46:59,838 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:46:59,838 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 1, 1, 1, 1, 1] [2021-11-20 06:46:59,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2021-11-20 06:46:59,838 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:46:59,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:46:59,839 INFO L85 PathProgramCache]: Analyzing trace with hash -86431824, now seen corresponding path program 1 times [2021-11-20 06:46:59,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:46:59,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446724730] [2021-11-20 06:46:59,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:46:59,839 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:46:59,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:46:59,966 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2021-11-20 06:46:59,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:46:59,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446724730] [2021-11-20 06:46:59,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446724730] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:46:59,966 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:46:59,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 06:46:59,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235810967] [2021-11-20 06:46:59,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:46:59,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:46:59,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:46:59,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:46:59,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:46:59,968 INFO L87 Difference]: Start difference. First operand 1855 states and 2760 transitions. Second operand has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 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 06:47:01,627 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:47:02,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:47:02,168 INFO L93 Difference]: Finished difference Result 4141 states and 6180 transitions. [2021-11-20 06:47:02,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:47:02,168 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 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 179 [2021-11-20 06:47:02,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:47:02,170 INFO L225 Difference]: With dead ends: 4141 [2021-11-20 06:47:02,170 INFO L226 Difference]: Without dead ends: 2309 [2021-11-20 06:47:02,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:47:02,171 INFO L933 BasicCegarLoop]: 143 mSDtfsCounter, 280 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:47:02,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 391 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-20 06:47:02,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2309 states. [2021-11-20 06:47:02,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2309 to 2014. [2021-11-20 06:47:02,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2014 states, 2013 states have (on average 1.5136612021857923) internal successors, (3047), 2013 states have internal predecessors, (3047), 0 states have call successors, (0), 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 06:47:02,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2014 states to 2014 states and 3047 transitions. [2021-11-20 06:47:02,257 INFO L78 Accepts]: Start accepts. Automaton has 2014 states and 3047 transitions. Word has length 179 [2021-11-20 06:47:02,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:47:02,257 INFO L470 AbstractCegarLoop]: Abstraction has 2014 states and 3047 transitions. [2021-11-20 06:47:02,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 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 06:47:02,257 INFO L276 IsEmpty]: Start isEmpty. Operand 2014 states and 3047 transitions. [2021-11-20 06:47:02,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-11-20 06:47:02,258 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:47:02,258 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1] [2021-11-20 06:47:02,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2021-11-20 06:47:02,259 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:47:02,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:47:02,259 INFO L85 PathProgramCache]: Analyzing trace with hash -364011577, now seen corresponding path program 1 times [2021-11-20 06:47:02,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:47:02,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509922770] [2021-11-20 06:47:02,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:47:02,259 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:47:02,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:47:02,382 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2021-11-20 06:47:02,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:47:02,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509922770] [2021-11-20 06:47:02,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509922770] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:47:02,383 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:47:02,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 06:47:02,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330439068] [2021-11-20 06:47:02,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:47:02,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:47:02,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:47:02,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:47:02,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:47:02,384 INFO L87 Difference]: Start difference. First operand 2014 states and 3047 transitions. Second operand has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 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 06:47:04,212 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:47:06,240 WARN L515 Checker$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 06:47:06,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:47:06,838 INFO L93 Difference]: Finished difference Result 4412 states and 6687 transitions. [2021-11-20 06:47:06,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:47:06,839 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 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 180 [2021-11-20 06:47:06,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:47:06,841 INFO L225 Difference]: With dead ends: 4412 [2021-11-20 06:47:06,841 INFO L226 Difference]: Without dead ends: 2421 [2021-11-20 06:47:06,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:47:06,842 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 156 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 62 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:47:06,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 467 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 328 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2021-11-20 06:47:06,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2421 states. [2021-11-20 06:47:06,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2421 to 2124. [2021-11-20 06:47:06,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2124 states, 2123 states have (on average 1.539802166745172) internal successors, (3269), 2123 states have internal predecessors, (3269), 0 states have call successors, (0), 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 06:47:06,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2124 states to 2124 states and 3269 transitions. [2021-11-20 06:47:06,935 INFO L78 Accepts]: Start accepts. Automaton has 2124 states and 3269 transitions. Word has length 180 [2021-11-20 06:47:06,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:47:06,935 INFO L470 AbstractCegarLoop]: Abstraction has 2124 states and 3269 transitions. [2021-11-20 06:47:06,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 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 06:47:06,935 INFO L276 IsEmpty]: Start isEmpty. Operand 2124 states and 3269 transitions. [2021-11-20 06:47:06,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-11-20 06:47:06,936 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:47:06,937 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:47:06,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2021-11-20 06:47:06,937 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:47:06,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:47:06,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1485485231, now seen corresponding path program 1 times [2021-11-20 06:47:06,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:47:06,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954412940] [2021-11-20 06:47:06,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:47:06,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:47:07,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:47:07,196 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2021-11-20 06:47:07,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:47:07,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954412940] [2021-11-20 06:47:07,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954412940] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:47:07,197 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:47:07,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 06:47:07,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574984071] [2021-11-20 06:47:07,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:47:07,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:47:07,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:47:07,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:47:07,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:47:07,198 INFO L87 Difference]: Start difference. First operand 2124 states and 3269 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 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 06:47:08,510 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:47:10,532 WARN L515 Checker$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 06:47:10,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:47:10,993 INFO L93 Difference]: Finished difference Result 4245 states and 6534 transitions. [2021-11-20 06:47:10,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:47:10,993 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 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 193 [2021-11-20 06:47:10,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:47:10,995 INFO L225 Difference]: With dead ends: 4245 [2021-11-20 06:47:10,995 INFO L226 Difference]: Without dead ends: 2124 [2021-11-20 06:47:10,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 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 06:47:10,997 INFO L933 BasicCegarLoop]: 212 mSDtfsCounter, 7 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 695 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:47:10,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 695 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 167 Invalid, 1 Unknown, 0 Unchecked, 3.6s Time] [2021-11-20 06:47:10,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2124 states. [2021-11-20 06:47:11,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2124 to 2124. [2021-11-20 06:47:11,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2124 states, 2123 states have (on average 1.5393311351860575) internal successors, (3268), 2123 states have internal predecessors, (3268), 0 states have call successors, (0), 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 06:47:11,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2124 states to 2124 states and 3268 transitions. [2021-11-20 06:47:11,122 INFO L78 Accepts]: Start accepts. Automaton has 2124 states and 3268 transitions. Word has length 193 [2021-11-20 06:47:11,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:47:11,122 INFO L470 AbstractCegarLoop]: Abstraction has 2124 states and 3268 transitions. [2021-11-20 06:47:11,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 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 06:47:11,123 INFO L276 IsEmpty]: Start isEmpty. Operand 2124 states and 3268 transitions. [2021-11-20 06:47:11,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-11-20 06:47:11,124 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:47:11,124 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:47:11,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2021-11-20 06:47:11,124 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:47:11,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:47:11,125 INFO L85 PathProgramCache]: Analyzing trace with hash -299918031, now seen corresponding path program 1 times [2021-11-20 06:47:11,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:47:11,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080729022] [2021-11-20 06:47:11,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:47:11,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:47:11,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:47:11,614 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 0 proven. 209 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2021-11-20 06:47:11,614 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:47:11,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080729022] [2021-11-20 06:47:11,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080729022] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:47:11,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974558156] [2021-11-20 06:47:11,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:47:11,615 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:47:11,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:47:11,624 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:47:11,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 06:47:12,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:47:12,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 741 conjuncts, 58 conjunts are in the unsatisfiable core [2021-11-20 06:47:12,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:47:23,961 WARN L227 SmtUtils]: Spent 11.58s on a formula simplification. DAG size of input: 72 DAG size of output: 25 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-20 06:47:23,963 INFO L354 Elim1Store]: treesize reduction 348, result has 9.6 percent of original size [2021-11-20 06:47:23,963 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 4 case distinctions, treesize of input 2564 treesize of output 2561 [2021-11-20 06:47:23,990 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Some non-self update cases but no top-level DER relation [2021-11-20 06:47:23,990 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:47:23,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-11-20 06:47:23,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316633070] [2021-11-20 06:47:23,991 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 06:47:23,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:47:23,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:47:23,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:47:23,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:47:23,992 INFO L87 Difference]: Start difference. First operand 2124 states and 3268 transitions. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 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 06:47:23,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 06:47:23,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:47:23,993 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:47:23,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:47:24,033 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 06:47:24,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:47:24,220 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@2f126f62 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:359) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:206) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:131) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.checkInternal(ChainingHoareTripleChecker.java:436) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.checkInternal(ChainingHoareTripleChecker.java:98) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:95) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:868) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:784) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-20 06:47:24,223 INFO L158 Benchmark]: Toolchain (without parser) took 270700.36ms. Allocated memory was 88.1MB in the beginning and 226.5MB in the end (delta: 138.4MB). Free memory was 65.6MB in the beginning and 103.5MB in the end (delta: -37.9MB). Peak memory consumption was 99.0MB. Max. memory is 16.1GB. [2021-11-20 06:47:24,223 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 88.1MB. Free memory was 64.6MB in the beginning and 64.5MB in the end (delta: 76.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 06:47:24,223 INFO L158 Benchmark]: CACSL2BoogieTranslator took 870.70ms. Allocated memory is still 88.1MB. Free memory was 65.3MB in the beginning and 42.8MB in the end (delta: 22.5MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2021-11-20 06:47:24,223 INFO L158 Benchmark]: Boogie Procedure Inliner took 86.19ms. Allocated memory is still 88.1MB. Free memory was 42.8MB in the beginning and 38.0MB in the end (delta: 4.8MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-11-20 06:47:24,223 INFO L158 Benchmark]: Boogie Preprocessor took 109.87ms. Allocated memory was 88.1MB in the beginning and 119.5MB in the end (delta: 31.5MB). Free memory was 38.0MB in the beginning and 91.5MB in the end (delta: -53.5MB). Peak memory consumption was 10.8MB. Max. memory is 16.1GB. [2021-11-20 06:47:24,223 INFO L158 Benchmark]: RCFGBuilder took 1713.92ms. Allocated memory is still 119.5MB. Free memory was 91.0MB in the beginning and 56.0MB in the end (delta: 35.0MB). Peak memory consumption was 45.0MB. Max. memory is 16.1GB. [2021-11-20 06:47:24,223 INFO L158 Benchmark]: TraceAbstraction took 267913.59ms. Allocated memory was 119.5MB in the beginning and 226.5MB in the end (delta: 107.0MB). Free memory was 55.3MB in the beginning and 103.5MB in the end (delta: -48.2MB). Peak memory consumption was 57.6MB. Max. memory is 16.1GB. [2021-11-20 06:47:24,224 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 88.1MB. Free memory was 64.6MB in the beginning and 64.5MB in the end (delta: 76.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 870.70ms. Allocated memory is still 88.1MB. Free memory was 65.3MB in the beginning and 42.8MB in the end (delta: 22.5MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 86.19ms. Allocated memory is still 88.1MB. Free memory was 42.8MB in the beginning and 38.0MB in the end (delta: 4.8MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Preprocessor took 109.87ms. Allocated memory was 88.1MB in the beginning and 119.5MB in the end (delta: 31.5MB). Free memory was 38.0MB in the beginning and 91.5MB in the end (delta: -53.5MB). Peak memory consumption was 10.8MB. Max. memory is 16.1GB. * RCFGBuilder took 1713.92ms. Allocated memory is still 119.5MB. Free memory was 91.0MB in the beginning and 56.0MB in the end (delta: 35.0MB). Peak memory consumption was 45.0MB. Max. memory is 16.1GB. * TraceAbstraction took 267913.59ms. Allocated memory was 119.5MB in the beginning and 226.5MB in the end (delta: 107.0MB). Free memory was 55.3MB in the beginning and 103.5MB in the end (delta: -48.2MB). Peak memory consumption was 57.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@2f126f62 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@2f126f62: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-20 06:47:24,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/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_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.15.i.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/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 4d1a05335dcd475270df3d2b7e447bf62801b1b41377a4a2d9fc94b2523fc1ec --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:47:26,624 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:47:26,626 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:47:26,659 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:47:26,660 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:47:26,661 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:47:26,663 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:47:26,665 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:47:26,668 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:47:26,669 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:47:26,670 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:47:26,673 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:47:26,674 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:47:26,677 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:47:26,679 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:47:26,682 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:47:26,684 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:47:26,690 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:47:26,692 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:47:26,695 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:47:26,702 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:47:26,703 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:47:26,704 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:47:26,706 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:47:26,710 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:47:26,715 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:47:26,715 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:47:26,716 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:47:26,718 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:47:26,719 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:47:26,719 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:47:26,720 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:47:26,722 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:47:26,723 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:47:26,724 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:47:26,725 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:47:26,726 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:47:26,726 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:47:26,727 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:47:26,728 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:47:26,729 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:47:26,730 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-11-20 06:47:26,774 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:47:26,775 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:47:26,775 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:47:26,775 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:47:26,776 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:47:26,777 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:47:26,778 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:47:26,778 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:47:26,778 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:47:26,779 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:47:26,780 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 06:47:26,780 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 06:47:26,780 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:47:26,780 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 06:47:26,781 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:47:26,781 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 06:47:26,781 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-20 06:47:26,781 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-20 06:47:26,781 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-20 06:47:26,782 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 06:47:26,782 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 06:47:26,782 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:47:26,782 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 06:47:26,783 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:47:26,783 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:47:26,783 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:47:26,783 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:47:26,784 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:47:26,784 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:47:26,784 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 06:47:26,784 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-20 06:47:26,784 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-20 06:47:26,785 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 06:47:26,785 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 06:47:26,785 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 06:47:26,785 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:47:26,786 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 06:47:26,786 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_edf24074-f0c2-439c-9e55-a66e01ca6288/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d1a05335dcd475270df3d2b7e447bf62801b1b41377a4a2d9fc94b2523fc1ec [2021-11-20 06:47:27,191 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:47:27,214 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:47:27,216 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:47:27,217 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:47:27,218 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:47:27,219 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/openssl/s3_srvr.blast.15.i.cil-1.c [2021-11-20 06:47:27,284 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/data/d82f03513/e62f5693e9e749bcb017d1a5899fca88/FLAG6ed683597 [2021-11-20 06:47:28,023 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:47:28,023 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/sv-benchmarks/c/openssl/s3_srvr.blast.15.i.cil-1.c [2021-11-20 06:47:28,044 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/data/d82f03513/e62f5693e9e749bcb017d1a5899fca88/FLAG6ed683597 [2021-11-20 06:47:28,204 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/data/d82f03513/e62f5693e9e749bcb017d1a5899fca88 [2021-11-20 06:47:28,206 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:47:28,208 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:47:28,210 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:47:28,210 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:47:28,226 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:47:28,227 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:47:28" (1/1) ... [2021-11-20 06:47:28,228 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@516ef8c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:47:28, skipping insertion in model container [2021-11-20 06:47:28,230 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:47:28" (1/1) ... [2021-11-20 06:47:28,237 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:47:28,306 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:47:28,824 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_edf24074-f0c2-439c-9e55-a66e01ca6288/sv-benchmarks/c/openssl/s3_srvr.blast.15.i.cil-1.c[75550,75563] [2021-11-20 06:47:28,835 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:47:28,857 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-20 06:47:28,889 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:47:29,046 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_edf24074-f0c2-439c-9e55-a66e01ca6288/sv-benchmarks/c/openssl/s3_srvr.blast.15.i.cil-1.c[75550,75563] [2021-11-20 06:47:29,053 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:47:29,064 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:47:29,193 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_edf24074-f0c2-439c-9e55-a66e01ca6288/sv-benchmarks/c/openssl/s3_srvr.blast.15.i.cil-1.c[75550,75563] [2021-11-20 06:47:29,200 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:47:29,224 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:47:29,225 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:47:29 WrapperNode [2021-11-20 06:47:29,225 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:47:29,226 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:47:29,226 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:47:29,226 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:47:29,233 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:47:29" (1/1) ... [2021-11-20 06:47:29,266 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:47:29" (1/1) ... [2021-11-20 06:47:29,327 INFO L137 Inliner]: procedures = 35, calls = 223, calls flagged for inlining = 7, calls inlined = 3, statements flattened = 769 [2021-11-20 06:47:29,336 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:47:29,336 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:47:29,336 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:47:29,337 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:47:29,354 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:47:29" (1/1) ... [2021-11-20 06:47:29,355 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:47:29" (1/1) ... [2021-11-20 06:47:29,368 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:47:29" (1/1) ... [2021-11-20 06:47:29,387 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:47:29" (1/1) ... [2021-11-20 06:47:29,441 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:47:29" (1/1) ... [2021-11-20 06:47:29,450 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:47:29" (1/1) ... [2021-11-20 06:47:29,454 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:47:29" (1/1) ... [2021-11-20 06:47:29,461 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:47:29,476 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:47:29,477 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:47:29,477 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:47:29,478 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:47:29" (1/1) ... [2021-11-20 06:47:29,487 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:47:29,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:47:29,517 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:47:29,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:47:29,575 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 06:47:29,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-20 06:47:29,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 06:47:29,575 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-20 06:47:29,576 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 06:47:29,576 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 06:47:29,576 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:47:29,576 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:47:29,576 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-20 06:47:29,742 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:47:29,743 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:47:29,764 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-20 06:47:40,120 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-11-20 06:47:40,120 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-11-20 06:47:40,120 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:47:40,130 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:47:40,130 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-20 06:47:40,133 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:47:40 BoogieIcfgContainer [2021-11-20 06:47:40,133 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:47:40,135 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:47:40,136 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:47:40,139 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:47:40,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:47:28" (1/3) ... [2021-11-20 06:47:40,140 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@413a102a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:47:40, skipping insertion in model container [2021-11-20 06:47:40,140 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:47:29" (2/3) ... [2021-11-20 06:47:40,141 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@413a102a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:47:40, skipping insertion in model container [2021-11-20 06:47:40,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:47:40" (3/3) ... [2021-11-20 06:47:40,143 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.15.i.cil-1.c [2021-11-20 06:47:40,149 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:47:40,150 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 06:47:40,209 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:47:40,217 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 06:47:40,217 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 06:47:40,238 INFO L276 IsEmpty]: Start isEmpty. Operand has 153 states, 151 states have (on average 1.7218543046357615) internal successors, (260), 152 states have internal predecessors, (260), 0 states have call successors, (0), 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 06:47:40,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-20 06:47:40,248 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:47:40,249 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 06:47:40,250 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:47:40,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:47:40,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1630857892, now seen corresponding path program 1 times [2021-11-20 06:47:40,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:47:40,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [147076317] [2021-11-20 06:47:40,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:47:40,274 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:47:40,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:47:40,280 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:47:40,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-20 06:47:40,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:47:40,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-20 06:47:40,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:47:40,873 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 06:47:40,887 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 06:47:41,049 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 0 case distinctions, treesize of input 336 treesize of output 319 [2021-11-20 06:47:41,745 INFO L354 Elim1Store]: treesize reduction 1607, result has 2.8 percent of original size [2021-11-20 06:47:41,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 case distinctions, treesize of input 1289 treesize of output 1241 [2021-11-20 06:47:42,000 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 0 case distinctions, treesize of input 336 treesize of output 319 [2021-11-20 06:47:42,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:47:42,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:47:42,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:47:42,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:47:42,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:47:42,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:47:42,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:47:42,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:47:42,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:47:42,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:47:42,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:47:42,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:47:42,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:47:42,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:47:42,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:47:42,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:47:42,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:47:42,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:47:42,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:47:42,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:47:42,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:47:42,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:47:42,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:47:42,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:47:42,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:47:42,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:47:42,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:47:42,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:47:42,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:47:42,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:47:42,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:47:42,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:47:42,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:47:42,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:47:42,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:47:42,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:47:42,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:47:42,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:47:42,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:47:42,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:47:42,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:47:42,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:47:42,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:47:42,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:47:42,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:47:42,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:47:42,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:47:42,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:47:42,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:47:42,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:47:42,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:47:42,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:47:42,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:47:42,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:47:42,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:47:42,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:47:42,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:47:42,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:47:42,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:47:42,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:47:42,194 INFO L244 Elim1Store]: Index analysis took 103 ms [2021-11-20 06:47:42,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 36 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 49 [2021-11-20 06:47:42,388 INFO L354 Elim1Store]: treesize reduction 340, result has 2.6 percent of original size [2021-11-20 06:47:42,389 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 4 case distinctions, treesize of input 62 treesize of output 13 [2021-11-20 06:47:42,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:47:42,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:47:42,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:47:42,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:47:42,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:47:42,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:47:42,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:47:42,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:47:42,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:47:42,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:47:42,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 13 [2021-11-20 06:47:42,474 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 37 treesize of output 25 [2021-11-20 06:47:42,480 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 22 treesize of output 10 [2021-11-20 06:47:42,644 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 06:47:42,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:47:43,888 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 06:47:43,889 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:47:43,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [147076317] [2021-11-20 06:47:43,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [147076317] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:47:43,891 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:47:43,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-20 06:47:43,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690954204] [2021-11-20 06:47:43,896 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:47:43,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:47:43,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:47:43,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:47:43,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:47:43,950 INFO L87 Difference]: Start difference. First operand has 153 states, 151 states have (on average 1.7218543046357615) internal successors, (260), 152 states have internal predecessors, (260), 0 states have call successors, (0), 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 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 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 06:47:45,995 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:47:51,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:47:51,008 INFO L93 Difference]: Finished difference Result 307 states and 519 transitions. [2021-11-20 06:47:51,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:47:51,012 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 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 06:47:51,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:47:51,020 INFO L225 Difference]: With dead ends: 307 [2021-11-20 06:47:51,020 INFO L226 Difference]: Without dead ends: 140 [2021-11-20 06:47:51,023 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:47:51,027 INFO L933 BasicCegarLoop]: 252 mSDtfsCounter, 16 mSDsluCounter, 597 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 849 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:47:51,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 849 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 115 Invalid, 1 Unknown, 65 Unchecked, 7.0s Time] [2021-11-20 06:47:51,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-11-20 06:47:51,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2021-11-20 06:47:51,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.5467625899280575) internal successors, (215), 139 states have internal predecessors, (215), 0 states have call successors, (0), 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 06:47:51,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 215 transitions. [2021-11-20 06:47:51,068 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 215 transitions. Word has length 45 [2021-11-20 06:47:51,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:47:51,069 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 215 transitions. [2021-11-20 06:47:51,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 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 06:47:51,069 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 215 transitions. [2021-11-20 06:47:51,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-20 06:47:51,072 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:47:51,072 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 06:47:51,094 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-20 06:47:51,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:47:51,290 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:47:51,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:47:51,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1766716126, now seen corresponding path program 1 times [2021-11-20 06:47:51,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:47:51,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1604270238] [2021-11-20 06:47:51,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:47:51,292 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:47:51,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:47:51,296 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:47:51,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-20 06:47:51,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:47:51,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:47:51,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:47:51,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:47:51,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:47:51,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:47:51,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:47:51,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:47:51,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:47:52,134 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-20 06:47:52,135 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 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-20 06:47:55,595 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-20 06:47:55,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-20 06:48:03,342 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-20 06:48:03,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-20 06:48:03,443 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 06:48:03,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:48:11,740 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 06:48:11,740 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:48:11,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1604270238] [2021-11-20 06:48:11,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1604270238] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:48:11,741 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:48:11,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 6 [2021-11-20 06:48:11,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040478759] [2021-11-20 06:48:11,742 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:48:11,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:48:11,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:48:11,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:48:11,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=15, Unknown=3, NotChecked=0, Total=30 [2021-11-20 06:48:11,744 INFO L87 Difference]: Start difference. First operand 140 states and 215 transitions. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 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 06:48:13,768 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:48:16,279 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:48:19,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:48:19,469 INFO L93 Difference]: Finished difference Result 285 states and 441 transitions. [2021-11-20 06:48:19,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:48:19,471 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 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 45 [2021-11-20 06:48:19,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:48:19,473 INFO L225 Difference]: With dead ends: 285 [2021-11-20 06:48:19,473 INFO L226 Difference]: Without dead ends: 155 [2021-11-20 06:48:19,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 82 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=12, Invalid=15, Unknown=3, NotChecked=0, Total=30 [2021-11-20 06:48:19,478 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 15 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 720 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 192 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:48:19,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 720 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 88 Invalid, 1 Unknown, 192 Unchecked, 7.7s Time] [2021-11-20 06:48:19,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-11-20 06:48:19,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 151. [2021-11-20 06:48:19,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.56) internal successors, (234), 150 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 06:48:19,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 234 transitions. [2021-11-20 06:48:19,496 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 234 transitions. Word has length 45 [2021-11-20 06:48:19,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:48:19,496 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 234 transitions. [2021-11-20 06:48:19,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 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 06:48:19,497 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 234 transitions. [2021-11-20 06:48:19,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-20 06:48:19,500 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:48:19,500 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 06:48:19,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-20 06:48:19,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:48:19,708 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:48:19,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:48:19,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1817968786, now seen corresponding path program 1 times [2021-11-20 06:48:19,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:48:19,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1305785172] [2021-11-20 06:48:19,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:48:19,710 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:48:19,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:48:19,711 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:48:19,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-20 06:48:20,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:48:20,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:48:20,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:48:20,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:48:20,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:48:20,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:48:20,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:48:20,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:48:20,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:48:20,519 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-20 06:48:20,520 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 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-20 06:48:23,658 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-20 06:48:23,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-20 06:48:30,918 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-20 06:48:30,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-20 06:48:31,049 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 06:48:31,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:48:31,339 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 06:48:31,339 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:48:31,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1305785172] [2021-11-20 06:48:31,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1305785172] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:48:31,340 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:48:31,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-20 06:48:31,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382529541] [2021-11-20 06:48:31,340 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:48:31,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:48:31,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:48:31,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:48:31,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-20 06:48:31,342 INFO L87 Difference]: Start difference. First operand 151 states and 234 transitions. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 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 06:48:33,364 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:48:36,707 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:48:36,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:48:36,722 INFO L93 Difference]: Finished difference Result 301 states and 467 transitions. [2021-11-20 06:48:36,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:48:36,724 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 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 58 [2021-11-20 06:48:36,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:48:36,725 INFO L225 Difference]: With dead ends: 301 [2021-11-20 06:48:36,726 INFO L226 Difference]: Without dead ends: 171 [2021-11-20 06:48:36,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-20 06:48:36,727 INFO L933 BasicCegarLoop]: 208 mSDtfsCounter, 38 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 27 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 646 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 136 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:48:36,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 646 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 84 Invalid, 1 Unknown, 136 Unchecked, 5.4s Time] [2021-11-20 06:48:36,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-11-20 06:48:36,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 167. [2021-11-20 06:48:36,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.5602409638554218) internal successors, (259), 166 states have internal predecessors, (259), 0 states have call successors, (0), 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 06:48:36,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 259 transitions. [2021-11-20 06:48:36,743 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 259 transitions. Word has length 58 [2021-11-20 06:48:36,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:48:36,744 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 259 transitions. [2021-11-20 06:48:36,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 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 06:48:36,744 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 259 transitions. [2021-11-20 06:48:36,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-20 06:48:36,746 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:48:36,747 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 06:48:36,765 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-20 06:48:36,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:48:36,962 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:48:36,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:48:36,963 INFO L85 PathProgramCache]: Analyzing trace with hash 329403111, now seen corresponding path program 1 times [2021-11-20 06:48:36,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:48:36,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1100672315] [2021-11-20 06:48:36,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:48:36,964 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:48:36,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:48:36,965 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:48:37,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-20 06:48:37,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:48:37,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:48:37,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:48:37,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:48:37,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:48:37,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:48:37,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:48:37,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:48:37,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:48:37,969 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-20 06:48:37,970 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 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-20 06:48:41,283 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-20 06:48:41,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-20 06:48:48,105 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-20 06:48:48,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-20 06:48:48,269 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 06:48:48,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:48:48,625 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 06:48:48,625 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:48:48,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1100672315] [2021-11-20 06:48:48,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1100672315] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:48:48,626 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:48:48,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-20 06:48:48,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777735389] [2021-11-20 06:48:48,626 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:48:48,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:48:48,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:48:48,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:48:48,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-20 06:48:48,628 INFO L87 Difference]: Start difference. First operand 167 states and 259 transitions. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 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 06:48:50,658 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:48:54,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:48:54,572 INFO L93 Difference]: Finished difference Result 324 states and 504 transitions. [2021-11-20 06:48:54,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:48:54,573 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 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 06:48:54,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:48:54,575 INFO L225 Difference]: With dead ends: 324 [2021-11-20 06:48:54,575 INFO L226 Difference]: Without dead ends: 178 [2021-11-20 06:48:54,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-20 06:48:54,577 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 20 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 28 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 726 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 204 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2021-11-20 06:48:54,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 726 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 89 Invalid, 1 Unknown, 204 Unchecked, 5.9s Time] [2021-11-20 06:48:54,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-11-20 06:48:54,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2021-11-20 06:48:54,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 1.5423728813559323) internal successors, (273), 177 states have internal predecessors, (273), 0 states have call successors, (0), 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 06:48:54,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 273 transitions. [2021-11-20 06:48:54,589 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 273 transitions. Word has length 59 [2021-11-20 06:48:54,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:48:54,590 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 273 transitions. [2021-11-20 06:48:54,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 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 06:48:54,590 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 273 transitions. [2021-11-20 06:48:54,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-20 06:48:54,592 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:48:54,593 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 06:48:54,607 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-20 06:48:54,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:48:54,800 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:48:54,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:48:54,800 INFO L85 PathProgramCache]: Analyzing trace with hash -2078660741, now seen corresponding path program 1 times [2021-11-20 06:48:54,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:48:54,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [7876460] [2021-11-20 06:48:54,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:48:54,801 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:48:54,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:48:54,806 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:48:54,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-20 06:48:55,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:48:55,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:48:55,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:48:55,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:48:55,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:48:55,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:48:55,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:48:55,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:48:55,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:48:55,624 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-20 06:48:55,625 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 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-20 06:48:58,994 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-20 06:48:58,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-20 06:49:05,850 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-20 06:49:05,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-20 06:49:06,005 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 06:49:06,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:49:06,283 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 06:49:06,283 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:49:06,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [7876460] [2021-11-20 06:49:06,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [7876460] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:49:06,284 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:49:06,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-20 06:49:06,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065344465] [2021-11-20 06:49:06,285 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:49:06,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:49:06,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:49:06,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:49:06,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-20 06:49:06,287 INFO L87 Difference]: Start difference. First operand 178 states and 273 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 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 06:49:08,316 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:49:11,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:49:11,018 INFO L93 Difference]: Finished difference Result 348 states and 536 transitions. [2021-11-20 06:49:11,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:49:11,021 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 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 06:49:11,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:49:11,022 INFO L225 Difference]: With dead ends: 348 [2021-11-20 06:49:11,022 INFO L226 Difference]: Without dead ends: 191 [2021-11-20 06:49:11,023 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-20 06:49:11,024 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 20 mSDsluCounter, 724 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 25 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 925 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 203 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:49:11,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 925 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 100 Invalid, 1 Unknown, 203 Unchecked, 4.7s Time] [2021-11-20 06:49:11,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-11-20 06:49:11,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2021-11-20 06:49:11,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.5263157894736843) internal successors, (290), 190 states have internal predecessors, (290), 0 states have call successors, (0), 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 06:49:11,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 290 transitions. [2021-11-20 06:49:11,039 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 290 transitions. Word has length 59 [2021-11-20 06:49:11,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:49:11,039 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 290 transitions. [2021-11-20 06:49:11,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 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 06:49:11,040 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 290 transitions. [2021-11-20 06:49:11,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-20 06:49:11,042 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:49:11,043 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 06:49:11,059 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-20 06:49:11,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:49:11,256 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:49:11,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:49:11,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1364189778, now seen corresponding path program 1 times [2021-11-20 06:49:11,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:49:11,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [752710840] [2021-11-20 06:49:11,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:49:11,258 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:49:11,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:49:11,259 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:49:11,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-20 06:49:11,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:49:11,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:49:11,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:49:11,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:49:11,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:49:11,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:49:11,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:49:11,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:49:11,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:49:12,139 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-20 06:49:12,139 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 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-20 06:49:15,453 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-20 06:49:15,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-20 06:49:22,895 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-20 06:49:22,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-20 06:49:23,033 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 06:49:23,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:49:23,359 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 06:49:23,359 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:49:23,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [752710840] [2021-11-20 06:49:23,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [752710840] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:49:23,360 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:49:23,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-20 06:49:23,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955984284] [2021-11-20 06:49:23,361 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:49:23,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:49:23,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:49:23,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:49:23,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-20 06:49:23,362 INFO L87 Difference]: Start difference. First operand 191 states and 290 transitions. Second operand has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 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 06:49:23,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:49:23,888 INFO L93 Difference]: Finished difference Result 363 states and 553 transitions. [2021-11-20 06:49:23,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:49:23,889 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 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 59 [2021-11-20 06:49:23,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:49:23,891 INFO L225 Difference]: With dead ends: 363 [2021-11-20 06:49:23,891 INFO L226 Difference]: Without dead ends: 193 [2021-11-20 06:49:23,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-20 06:49:23,893 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 18 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 618 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:49:23,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 618 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 101 Unchecked, 0.5s Time] [2021-11-20 06:49:23,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-11-20 06:49:23,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 191. [2021-11-20 06:49:23,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.5210526315789474) internal successors, (289), 190 states have internal predecessors, (289), 0 states have call successors, (0), 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 06:49:23,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 289 transitions. [2021-11-20 06:49:23,902 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 289 transitions. Word has length 59 [2021-11-20 06:49:23,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:49:23,902 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 289 transitions. [2021-11-20 06:49:23,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 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 06:49:23,903 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 289 transitions. [2021-11-20 06:49:23,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-20 06:49:23,905 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:49:23,905 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 06:49:23,919 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-11-20 06:49:24,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:49:24,120 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:49:24,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:49:24,120 INFO L85 PathProgramCache]: Analyzing trace with hash -639030510, now seen corresponding path program 1 times [2021-11-20 06:49:24,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:49:24,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1986629176] [2021-11-20 06:49:24,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:49:24,121 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:49:24,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:49:24,122 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:49:24,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-20 06:49:24,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:49:24,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:49:24,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:49:24,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:49:24,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:49:24,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:49:24,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:49:24,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:49:24,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:49:24,901 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-20 06:49:24,902 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 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-20 06:49:28,315 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-20 06:49:28,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-20 06:49:35,515 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-20 06:49:35,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-20 06:49:35,653 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 06:49:35,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:49:35,929 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 06:49:35,929 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:49:35,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1986629176] [2021-11-20 06:49:35,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1986629176] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:49:35,930 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:49:35,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-20 06:49:35,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351069434] [2021-11-20 06:49:35,930 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:49:35,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:49:35,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:49:35,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:49:35,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-20 06:49:35,931 INFO L87 Difference]: Start difference. First operand 191 states and 289 transitions. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 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 06:49:37,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:49:37,086 INFO L93 Difference]: Finished difference Result 362 states and 551 transitions. [2021-11-20 06:49:37,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:49:37,087 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 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 59 [2021-11-20 06:49:37,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:49:37,088 INFO L225 Difference]: With dead ends: 362 [2021-11-20 06:49:37,089 INFO L226 Difference]: Without dead ends: 192 [2021-11-20 06:49:37,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-20 06:49:37,090 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 16 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 823 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:49:37,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 823 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 101 Unchecked, 1.1s Time] [2021-11-20 06:49:37,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-11-20 06:49:37,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 191. [2021-11-20 06:49:37,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.5157894736842106) internal successors, (288), 190 states have internal predecessors, (288), 0 states have call successors, (0), 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 06:49:37,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 288 transitions. [2021-11-20 06:49:37,119 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 288 transitions. Word has length 59 [2021-11-20 06:49:37,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:49:37,119 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 288 transitions. [2021-11-20 06:49:37,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 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 06:49:37,120 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 288 transitions. [2021-11-20 06:49:37,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-20 06:49:37,121 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:49:37,121 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 06:49:37,140 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-20 06:49:37,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:49:37,328 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:49:37,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:49:37,329 INFO L85 PathProgramCache]: Analyzing trace with hash -623672389, now seen corresponding path program 1 times [2021-11-20 06:49:37,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:49:37,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1886328475] [2021-11-20 06:49:37,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:49:37,330 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:49:37,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:49:37,331 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:49:37,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-20 06:49:37,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:49:37,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:49:37,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:49:37,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:49:37,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:49:37,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:49:37,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:49:37,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:49:37,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:49:38,164 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-20 06:49:38,165 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 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-20 06:49:41,206 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-20 06:49:41,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-20 06:49:47,949 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-20 06:49:47,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-20 06:49:48,097 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 06:49:48,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:49:48,383 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 06:49:48,383 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:49:48,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1886328475] [2021-11-20 06:49:48,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1886328475] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:49:48,384 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:49:48,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-20 06:49:48,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984901194] [2021-11-20 06:49:48,384 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:49:48,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:49:48,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:49:48,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:49:48,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-20 06:49:48,385 INFO L87 Difference]: Start difference. First operand 191 states and 288 transitions. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 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 06:49:50,408 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:49:51,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:49:51,927 INFO L93 Difference]: Finished difference Result 373 states and 566 transitions. [2021-11-20 06:49:51,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:49:51,928 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 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 06:49:51,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:49:51,930 INFO L225 Difference]: With dead ends: 373 [2021-11-20 06:49:51,930 INFO L226 Difference]: Without dead ends: 203 [2021-11-20 06:49:51,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-20 06:49:51,931 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 26 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 25 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:49:51,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 538 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 88 Invalid, 1 Unknown, 36 Unchecked, 3.5s Time] [2021-11-20 06:49:51,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-11-20 06:49:51,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 193. [2021-11-20 06:49:51,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 1.5052083333333333) internal successors, (289), 192 states have internal predecessors, (289), 0 states have call successors, (0), 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 06:49:51,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 289 transitions. [2021-11-20 06:49:51,943 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 289 transitions. Word has length 60 [2021-11-20 06:49:51,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:49:51,943 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 289 transitions. [2021-11-20 06:49:51,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 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 06:49:51,944 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 289 transitions. [2021-11-20 06:49:51,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-20 06:49:51,945 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:49:51,945 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 06:49:51,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-20 06:49:52,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:49:52,156 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:49:52,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:49:52,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1498911040, now seen corresponding path program 1 times [2021-11-20 06:49:52,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:49:52,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [496657020] [2021-11-20 06:49:52,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:49:52,157 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:49:52,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:49:52,158 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:49:52,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-20 06:49:52,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:49:52,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:49:52,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:49:52,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:49:52,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:49:52,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:49:52,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:49:52,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:49:52,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:49:52,952 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-20 06:49:52,953 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 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-20 06:49:56,171 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-20 06:49:56,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-20 06:50:03,026 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-20 06:50:03,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-20 06:50:03,162 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 06:50:03,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:50:03,382 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 06:50:03,382 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:50:03,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [496657020] [2021-11-20 06:50:03,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [496657020] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:50:03,382 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:50:03,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-20 06:50:03,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361751226] [2021-11-20 06:50:03,383 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:50:03,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:50:03,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:50:03,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:50:03,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-20 06:50:03,384 INFO L87 Difference]: Start difference. First operand 193 states and 289 transitions. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 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 06:50:05,407 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:50:07,114 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:50:08,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:50:08,104 INFO L93 Difference]: Finished difference Result 367 states and 556 transitions. [2021-11-20 06:50:08,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:50:08,106 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 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 06:50:08,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:50:08,107 INFO L225 Difference]: With dead ends: 367 [2021-11-20 06:50:08,108 INFO L226 Difference]: Without dead ends: 195 [2021-11-20 06:50:08,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-20 06:50:08,109 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 21 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 25 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 624 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 129 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:50:08,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 624 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 87 Invalid, 1 Unknown, 129 Unchecked, 4.7s Time] [2021-11-20 06:50:08,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-11-20 06:50:08,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2021-11-20 06:50:08,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 1.4948453608247423) internal successors, (290), 194 states have internal predecessors, (290), 0 states have call successors, (0), 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 06:50:08,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 290 transitions. [2021-11-20 06:50:08,136 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 290 transitions. Word has length 61 [2021-11-20 06:50:08,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:50:08,136 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 290 transitions. [2021-11-20 06:50:08,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 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 06:50:08,137 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 290 transitions. [2021-11-20 06:50:08,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-20 06:50:08,144 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:50:08,145 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 06:50:08,159 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-11-20 06:50:08,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:50:08,345 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:50:08,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:50:08,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1596742752, now seen corresponding path program 1 times [2021-11-20 06:50:08,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:50:08,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1987587811] [2021-11-20 06:50:08,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:50:08,347 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:50:08,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:50:08,348 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:50:08,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-20 06:50:08,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:08,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:50:08,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:50:08,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:50:08,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:50:08,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:50:08,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:50:08,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:50:08,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:50:09,342 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-20 06:50:09,342 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 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-20 06:50:12,386 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-20 06:50:12,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-20 06:50:19,457 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-20 06:50:19,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-20 06:50:19,599 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 06:50:19,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:50:19,879 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 06:50:19,879 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:50:19,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1987587811] [2021-11-20 06:50:19,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1987587811] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:50:19,880 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:50:19,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-20 06:50:19,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353022512] [2021-11-20 06:50:19,880 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:50:19,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:50:19,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:50:19,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:50:19,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-20 06:50:19,882 INFO L87 Difference]: Start difference. First operand 195 states and 290 transitions. Second operand has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 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 06:50:21,901 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:50:23,646 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:50:26,453 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:50:28,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:50:28,086 INFO L93 Difference]: Finished difference Result 380 states and 570 transitions. [2021-11-20 06:50:28,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:50:28,092 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 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 62 [2021-11-20 06:50:28,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:50:28,093 INFO L225 Difference]: With dead ends: 380 [2021-11-20 06:50:28,093 INFO L226 Difference]: Without dead ends: 206 [2021-11-20 06:50:28,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-20 06:50:28,094 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 31 mSDsluCounter, 654 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 32 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 860 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 146 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:50:28,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 860 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 118 Invalid, 1 Unknown, 146 Unchecked, 8.2s Time] [2021-11-20 06:50:28,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-11-20 06:50:28,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 196. [2021-11-20 06:50:28,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 1.4820512820512821) internal successors, (289), 195 states have internal predecessors, (289), 0 states have call successors, (0), 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 06:50:28,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 289 transitions. [2021-11-20 06:50:28,103 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 289 transitions. Word has length 62 [2021-11-20 06:50:28,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:50:28,103 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 289 transitions. [2021-11-20 06:50:28,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 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 06:50:28,103 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 289 transitions. [2021-11-20 06:50:28,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-20 06:50:28,104 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:50:28,105 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 06:50:28,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-20 06:50:28,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:50:28,320 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:50:28,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:50:28,320 INFO L85 PathProgramCache]: Analyzing trace with hash 2086351112, now seen corresponding path program 1 times [2021-11-20 06:50:28,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:50:28,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1664683631] [2021-11-20 06:50:28,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:50:28,321 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:50:28,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:50:28,322 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:50:28,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-20 06:50:28,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:28,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:50:28,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:50:28,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:50:28,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:50:28,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:50:28,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:50:28,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:50:28,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:50:28,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:50:28,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:50:28,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:50:28,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:50:28,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:50:28,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:50:28,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:50:28,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:50:28,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:50:28,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:50:28,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:50:28,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:50:29,136 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-20 06:50:29,137 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 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-20 06:50:30,256 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-20 06:50:30,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-20 06:50:30,341 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 06:50:30,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:50:30,599 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 06:50:30,599 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:50:30,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1664683631] [2021-11-20 06:50:30,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1664683631] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:50:30,599 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:50:30,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-20 06:50:30,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223629587] [2021-11-20 06:50:30,600 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:50:30,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:50:30,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:50:30,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:50:30,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:50:30,601 INFO L87 Difference]: Start difference. First operand 196 states and 289 transitions. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 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 06:50:32,636 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:50:34,643 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:50:38,902 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:50:46,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:50:46,740 INFO L93 Difference]: Finished difference Result 403 states and 600 transitions. [2021-11-20 06:50:46,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:50:46,746 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 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 62 [2021-11-20 06:50:46,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:50:46,748 INFO L225 Difference]: With dead ends: 403 [2021-11-20 06:50:46,748 INFO L226 Difference]: Without dead ends: 228 [2021-11-20 06:50:46,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 118 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:50:46,750 INFO L933 BasicCegarLoop]: 205 mSDtfsCounter, 21 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 4 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 638 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:50:46,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 638 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 244 Invalid, 3 Unknown, 0 Unchecked, 16.1s Time] [2021-11-20 06:50:46,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-11-20 06:50:46,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 218. [2021-11-20 06:50:46,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 1.4792626728110598) internal successors, (321), 217 states have internal predecessors, (321), 0 states have call successors, (0), 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 06:50:46,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 321 transitions. [2021-11-20 06:50:46,760 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 321 transitions. Word has length 62 [2021-11-20 06:50:46,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:50:46,761 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 321 transitions. [2021-11-20 06:50:46,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 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 06:50:46,761 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 321 transitions. [2021-11-20 06:50:46,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-20 06:50:46,762 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:50:46,762 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 06:50:46,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-20 06:50:46,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:50:46,966 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:50:46,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:50:46,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1800933116, now seen corresponding path program 1 times [2021-11-20 06:50:46,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:50:46,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [513569145] [2021-11-20 06:50:46,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:50:46,967 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:50:46,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:50:46,968 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:50:46,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-20 06:50:47,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:47,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:50:47,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:50:47,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:50:47,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:50:47,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:50:47,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:50:47,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:50:47,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:50:47,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:50:47,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:50:47,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:50:47,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:50:47,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:50:47,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:50:47,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:50:47,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:50:47,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:50:47,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:50:47,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:50:47,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:50:47,995 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-20 06:50:47,996 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 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-20 06:50:48,860 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-20 06:50:48,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-20 06:50:48,970 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 06:50:48,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:50:49,256 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 06:50:49,256 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:50:49,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [513569145] [2021-11-20 06:50:49,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [513569145] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:50:49,257 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:50:49,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-20 06:50:49,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561304848] [2021-11-20 06:50:49,257 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:50:49,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:50:49,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:50:49,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:50:49,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:50:49,258 INFO L87 Difference]: Start difference. First operand 218 states and 321 transitions. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 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 06:50:51,278 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:50:54,316 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:50:57,899 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:51:01,236 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:51:04,820 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:51:06,545 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:51:12,422 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:51:13,611 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:51:14,753 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:51:20,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:51:20,569 INFO L93 Difference]: Finished difference Result 526 states and 789 transitions. [2021-11-20 06:51:20,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:51:20,570 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 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 76 [2021-11-20 06:51:20,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:51:20,573 INFO L225 Difference]: With dead ends: 526 [2021-11-20 06:51:20,573 INFO L226 Difference]: Without dead ends: 329 [2021-11-20 06:51:20,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:51:20,575 INFO L933 BasicCegarLoop]: 143 mSDtfsCounter, 188 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 66 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:51:20,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 636 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 476 Invalid, 1 Unknown, 0 Unchecked, 31.2s Time] [2021-11-20 06:51:20,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-11-20 06:51:20,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 221. [2021-11-20 06:51:20,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 1.4772727272727273) internal successors, (325), 220 states have internal predecessors, (325), 0 states have call successors, (0), 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 06:51:20,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 325 transitions. [2021-11-20 06:51:20,588 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 325 transitions. Word has length 76 [2021-11-20 06:51:20,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:51:20,589 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 325 transitions. [2021-11-20 06:51:20,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 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 06:51:20,589 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 325 transitions. [2021-11-20 06:51:20,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-20 06:51:20,590 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:51:20,591 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 06:51:20,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-20 06:51:20,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:51:20,811 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:51:20,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:51:20,811 INFO L85 PathProgramCache]: Analyzing trace with hash -202287172, now seen corresponding path program 1 times [2021-11-20 06:51:20,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:51:20,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [147871599] [2021-11-20 06:51:20,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:51:20,812 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:51:20,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:51:20,813 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:51:20,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-20 06:51:21,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:21,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:51:21,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:51:21,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:51:21,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:51:21,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:51:21,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:51:21,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:51:21,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:51:21,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:51:21,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:51:21,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:51:21,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:51:21,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:51:21,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:51:21,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:51:21,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:51:21,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:51:21,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:51:21,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:51:21,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:51:21,762 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-20 06:51:21,763 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 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-20 06:51:22,554 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-20 06:51:22,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-20 06:51:22,674 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 06:51:22,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:51:22,952 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 06:51:22,953 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:51:22,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [147871599] [2021-11-20 06:51:22,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [147871599] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:51:22,953 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:51:22,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-20 06:51:22,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993165209] [2021-11-20 06:51:22,954 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:51:22,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:51:22,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:51:22,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:51:22,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:51:22,955 INFO L87 Difference]: Start difference. First operand 221 states and 325 transitions. Second operand has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 6 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 06:51:24,984 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:51:26,995 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:51:31,663 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:51:34,685 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:51:38,715 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:51:47,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:51:47,835 INFO L93 Difference]: Finished difference Result 527 states and 789 transitions. [2021-11-20 06:51:47,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:51:47,836 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 6 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 76 [2021-11-20 06:51:47,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:51:47,838 INFO L225 Difference]: With dead ends: 527 [2021-11-20 06:51:47,839 INFO L226 Difference]: Without dead ends: 327 [2021-11-20 06:51:47,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:51:47,840 INFO L933 BasicCegarLoop]: 145 mSDtfsCounter, 168 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 61 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.8s IncrementalHoareTripleChecker+Time [2021-11-20 06:51:47,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 521 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 385 Invalid, 2 Unknown, 0 Unchecked, 24.8s Time] [2021-11-20 06:51:47,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-11-20 06:51:47,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 221. [2021-11-20 06:51:47,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 1.4681818181818183) internal successors, (323), 220 states have internal predecessors, (323), 0 states have call successors, (0), 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 06:51:47,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 323 transitions. [2021-11-20 06:51:47,851 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 323 transitions. Word has length 76 [2021-11-20 06:51:47,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:51:47,852 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 323 transitions. [2021-11-20 06:51:47,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 6 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 06:51:47,852 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 323 transitions. [2021-11-20 06:51:47,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-20 06:51:47,853 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:51:47,854 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 06:51:47,873 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-20 06:51:48,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:51:48,067 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:51:48,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:51:48,068 INFO L85 PathProgramCache]: Analyzing trace with hash -563287765, now seen corresponding path program 1 times [2021-11-20 06:51:48,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:51:48,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1632822347] [2021-11-20 06:51:48,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:51:48,069 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:51:48,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:51:48,070 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:51:48,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-20 06:51:48,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:48,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:51:48,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:51:48,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:51:48,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:51:48,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:51:48,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:51:48,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:51:48,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:51:48,896 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-20 06:51:48,897 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 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-20 06:51:48,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:51:48,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:51:48,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:51:49,318 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-20 06:51:49,319 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 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-20 06:51:51,701 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-20 06:51:51,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-20 06:51:51,738 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 06:51:51,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:51:52,158 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 06:51:52,158 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:51:52,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1632822347] [2021-11-20 06:51:52,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1632822347] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:51:52,159 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:51:52,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-20 06:51:52,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414176783] [2021-11-20 06:51:52,159 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:51:52,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:51:52,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:51:52,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:51:52,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:51:52,160 INFO L87 Difference]: Start difference. First operand 221 states and 323 transitions. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 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 06:51:54,184 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:52:04,926 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:52:06,400 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:52:12,712 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:52:14,314 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:52:19,783 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:52:23,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:52:23,320 INFO L93 Difference]: Finished difference Result 650 states and 967 transitions. [2021-11-20 06:52:23,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:52:23,322 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 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 84 [2021-11-20 06:52:23,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:52:23,325 INFO L225 Difference]: With dead ends: 650 [2021-11-20 06:52:23,325 INFO L226 Difference]: Without dead ends: 450 [2021-11-20 06:52:23,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 160 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:52:23,326 INFO L933 BasicCegarLoop]: 161 mSDtfsCounter, 386 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 89 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 688 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:52:23,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 688 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 520 Invalid, 1 Unknown, 0 Unchecked, 31.0s Time] [2021-11-20 06:52:23,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-11-20 06:52:23,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 275. [2021-11-20 06:52:23,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 1.4963503649635037) internal successors, (410), 274 states have internal predecessors, (410), 0 states have call successors, (0), 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 06:52:23,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 410 transitions. [2021-11-20 06:52:23,339 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 410 transitions. Word has length 84 [2021-11-20 06:52:23,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:52:23,340 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 410 transitions. [2021-11-20 06:52:23,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 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 06:52:23,340 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 410 transitions. [2021-11-20 06:52:23,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-20 06:52:23,341 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:52:23,341 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 06:52:23,365 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-20 06:52:23,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:52:23,566 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:52:23,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:52:23,566 INFO L85 PathProgramCache]: Analyzing trace with hash 2033323436, now seen corresponding path program 1 times [2021-11-20 06:52:23,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:52:23,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [135524570] [2021-11-20 06:52:23,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:52:23,568 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:52:23,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:52:23,569 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:52:23,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-20 06:52:24,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:52:24,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:52:24,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:52:24,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:52:24,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:52:24,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:52:24,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:52:24,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:52:24,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:52:24,212 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-20 06:52:24,212 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 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-20 06:52:24,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:52:24,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:52:24,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:52:24,583 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-20 06:52:24,584 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 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-20 06:52:26,958 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-20 06:52:26,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-20 06:52:26,995 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 06:52:26,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:52:27,446 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 06:52:27,446 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:52:27,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [135524570] [2021-11-20 06:52:27,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [135524570] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:52:27,447 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:52:27,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-20 06:52:27,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816154933] [2021-11-20 06:52:27,447 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:52:27,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:52:27,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:52:27,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:52:27,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:52:27,448 INFO L87 Difference]: Start difference. First operand 275 states and 410 transitions. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 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 06:52:29,473 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:52:31,481 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:52:45,860 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:52:47,463 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:52:49,245 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:52:55,238 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:52:56,864 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:52:58,301 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:53:07,864 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:53:11,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:53:11,434 INFO L93 Difference]: Finished difference Result 716 states and 1082 transitions. [2021-11-20 06:53:11,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:53:11,437 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 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 06:53:11,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:53:11,440 INFO L225 Difference]: With dead ends: 716 [2021-11-20 06:53:11,440 INFO L226 Difference]: Without dead ends: 462 [2021-11-20 06:53:11,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 162 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:53:11,441 INFO L933 BasicCegarLoop]: 172 mSDtfsCounter, 226 mSDsluCounter, 683 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 75 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 42.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 855 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 43.9s IncrementalHoareTripleChecker+Time [2021-11-20 06:53:11,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 855 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 630 Invalid, 3 Unknown, 0 Unchecked, 43.9s Time] [2021-11-20 06:53:11,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-11-20 06:53:11,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 297. [2021-11-20 06:53:11,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 1.5304054054054055) internal successors, (453), 296 states have internal predecessors, (453), 0 states have call successors, (0), 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 06:53:11,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 453 transitions. [2021-11-20 06:53:11,458 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 453 transitions. Word has length 85 [2021-11-20 06:53:11,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:53:11,458 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 453 transitions. [2021-11-20 06:53:11,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 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 06:53:11,459 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 453 transitions. [2021-11-20 06:53:11,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-20 06:53:11,461 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:53:11,461 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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] [2021-11-20 06:53:11,480 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-20 06:53:11,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:53:11,676 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:53:11,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:53:11,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1821991616, now seen corresponding path program 1 times [2021-11-20 06:53:11,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:53:11,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1683596469] [2021-11-20 06:53:11,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:53:11,677 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:53:11,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:53:11,678 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:53:11,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-20 06:53:12,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:12,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:53:12,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:53:12,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:53:12,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:53:12,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:53:12,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:53:12,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:53:12,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:53:12,368 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-20 06:53:12,368 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 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-20 06:53:12,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:53:12,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:53:12,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:53:12,833 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-20 06:53:12,833 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 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-20 06:53:14,653 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-20 06:53:14,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-20 06:53:14,804 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 06:53:14,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:53:15,387 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 06:53:15,387 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:53:15,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1683596469] [2021-11-20 06:53:15,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1683596469] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:53:15,387 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:53:15,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-20 06:53:15,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586804918] [2021-11-20 06:53:15,388 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:53:15,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:53:15,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:53:15,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:53:15,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:53:15,389 INFO L87 Difference]: Start difference. First operand 297 states and 453 transitions. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 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 06:53:17,417 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:53:19,869 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:53:27,699 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:53:32,173 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:53:36,310 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:53:38,371 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:53:40,092 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:53:42,105 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:53:43,390 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:53:44,596 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:53:44,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:53:44,763 INFO L93 Difference]: Finished difference Result 775 states and 1194 transitions. [2021-11-20 06:53:44,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:53:44,764 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 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 113 [2021-11-20 06:53:44,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:53:44,767 INFO L225 Difference]: With dead ends: 775 [2021-11-20 06:53:44,768 INFO L226 Difference]: Without dead ends: 499 [2021-11-20 06:53:44,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 218 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:53:44,769 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 282 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 54 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 709 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:53:44,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 709 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 466 Invalid, 4 Unknown, 0 Unchecked, 29.2s Time] [2021-11-20 06:53:44,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2021-11-20 06:53:44,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 347. [2021-11-20 06:53:44,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 1.5433526011560694) internal successors, (534), 346 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:53:44,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 534 transitions. [2021-11-20 06:53:44,785 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 534 transitions. Word has length 113 [2021-11-20 06:53:44,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:53:44,786 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 534 transitions. [2021-11-20 06:53:44,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 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 06:53:44,786 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 534 transitions. [2021-11-20 06:53:44,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-20 06:53:44,788 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:53:44,788 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2021-11-20 06:53:44,807 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-11-20 06:53:45,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:53:45,007 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:53:45,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:53:45,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1964206957, now seen corresponding path program 1 times [2021-11-20 06:53:45,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:53:45,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1482097666] [2021-11-20 06:53:45,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:53:45,008 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:53:45,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:53:45,009 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:53:45,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-20 06:53:45,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:45,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:53:45,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:53:45,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:53:45,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:53:45,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:53:45,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:53:45,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:53:45,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:53:45,762 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-20 06:53:45,763 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 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-20 06:53:45,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:53:45,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:53:45,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:53:46,160 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-20 06:53:46,160 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 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-20 06:53:48,126 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-20 06:53:48,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-20 06:53:48,235 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 06:53:48,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:53:48,642 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 06:53:48,642 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:53:48,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1482097666] [2021-11-20 06:53:48,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1482097666] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:53:48,643 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:53:48,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-20 06:53:48,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329646893] [2021-11-20 06:53:48,643 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:53:48,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:53:48,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:53:48,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:53:48,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:53:48,644 INFO L87 Difference]: Start difference. First operand 347 states and 534 transitions. Second operand has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 7 states have internal predecessors, (142), 0 states have call successors, (0), 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 06:53:50,661 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:53:56,351 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:54:03,347 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:54:08,110 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:54:09,938 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:54:19,327 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:54:20,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:54:20,470 INFO L93 Difference]: Finished difference Result 875 states and 1344 transitions. [2021-11-20 06:54:20,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:54:20,471 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 7 states have internal predecessors, (142), 0 states have call successors, (0), 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 118 [2021-11-20 06:54:20,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:54:20,474 INFO L225 Difference]: With dead ends: 875 [2021-11-20 06:54:20,474 INFO L226 Difference]: Without dead ends: 549 [2021-11-20 06:54:20,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 228 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:54:20,476 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 352 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 80 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:54:20,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [352 Valid, 494 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 400 Invalid, 2 Unknown, 0 Unchecked, 31.7s Time] [2021-11-20 06:54:20,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-11-20 06:54:20,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 384. [2021-11-20 06:54:20,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 1.5456919060052219) internal successors, (592), 383 states have internal predecessors, (592), 0 states have call successors, (0), 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 06:54:20,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 592 transitions. [2021-11-20 06:54:20,497 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 592 transitions. Word has length 118 [2021-11-20 06:54:20,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:54:20,498 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 592 transitions. [2021-11-20 06:54:20,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 7 states have internal predecessors, (142), 0 states have call successors, (0), 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 06:54:20,498 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 592 transitions. [2021-11-20 06:54:20,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-20 06:54:20,501 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:54:20,501 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2021-11-20 06:54:20,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-20 06:54:20,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:54:20,716 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:54:20,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:54:20,717 INFO L85 PathProgramCache]: Analyzing trace with hash -99507122, now seen corresponding path program 1 times [2021-11-20 06:54:20,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:54:20,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2019351597] [2021-11-20 06:54:20,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:54:20,718 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:54:20,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:54:20,720 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:54:20,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-20 06:54:21,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:21,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:54:21,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:54:21,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:54:21,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:54:21,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:54:21,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:54:21,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:54:21,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:54:21,593 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-20 06:54:21,593 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 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-20 06:54:21,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:54:21,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:54:21,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:54:22,007 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-20 06:54:22,009 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 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-20 06:54:24,233 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-20 06:54:24,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-20 06:54:24,370 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 06:54:24,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:54:24,869 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 06:54:24,870 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:54:24,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2019351597] [2021-11-20 06:54:24,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2019351597] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:54:24,870 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:54:24,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-20 06:54:24,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146561263] [2021-11-20 06:54:24,873 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:54:24,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:54:24,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:54:24,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:54:24,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:54:24,874 INFO L87 Difference]: Start difference. First operand 384 states and 592 transitions. Second operand has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 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 06:54:26,896 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:54:28,905 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:54:35,375 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:54:39,782 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:54:45,521 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:54:46,857 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:54:49,114 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:54:57,527 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:54:59,018 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:55:00,901 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:55:02,064 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:55:03,929 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:55:04,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:55:04,391 INFO L93 Difference]: Finished difference Result 907 states and 1393 transitions. [2021-11-20 06:55:04,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:55:04,393 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 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 119 [2021-11-20 06:55:04,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:55:04,395 INFO L225 Difference]: With dead ends: 907 [2021-11-20 06:55:04,396 INFO L226 Difference]: Without dead ends: 544 [2021-11-20 06:55:04,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 230 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:55:04,397 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 222 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 77 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 38.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 610 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 39.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:55:04,397 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 610 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 500 Invalid, 3 Unknown, 0 Unchecked, 39.4s Time] [2021-11-20 06:55:04,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-11-20 06:55:04,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 384. [2021-11-20 06:55:04,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 1.5404699738903394) internal successors, (590), 383 states have internal predecessors, (590), 0 states have call successors, (0), 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 06:55:04,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 590 transitions. [2021-11-20 06:55:04,416 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 590 transitions. Word has length 119 [2021-11-20 06:55:04,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:55:04,416 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 590 transitions. [2021-11-20 06:55:04,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 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 06:55:04,417 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 590 transitions. [2021-11-20 06:55:04,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-20 06:55:04,418 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:55:04,418 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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] [2021-11-20 06:55:04,442 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-20 06:55:04,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:55:04,632 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:55:04,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:55:04,633 INFO L85 PathProgramCache]: Analyzing trace with hash 28083966, now seen corresponding path program 1 times [2021-11-20 06:55:04,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:55:04,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [753574823] [2021-11-20 06:55:04,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:55:04,634 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:55:04,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:55:04,634 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:55:04,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-20 06:55:04,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:55:04,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 06:55:04,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:55:05,189 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 06:55:05,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:55:05,517 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 06:55:05,517 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:55:05,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [753574823] [2021-11-20 06:55:05,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [753574823] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:55:05,517 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:55:05,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-20 06:55:05,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717965529] [2021-11-20 06:55:05,518 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:55:05,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:55:05,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:55:05,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:55:05,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:55:05,519 INFO L87 Difference]: Start difference. First operand 384 states and 590 transitions. Second operand has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 0 states have call successors, (0), 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 06:55:06,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:55:06,377 INFO L93 Difference]: Finished difference Result 1409 states and 2185 transitions. [2021-11-20 06:55:06,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:55:06,377 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 0 states have call successors, (0), 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 127 [2021-11-20 06:55:06,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:55:06,382 INFO L225 Difference]: With dead ends: 1409 [2021-11-20 06:55:06,382 INFO L226 Difference]: Without dead ends: 1046 [2021-11-20 06:55:06,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:55:06,384 INFO L933 BasicCegarLoop]: 248 mSDtfsCounter, 293 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 609 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 06:55:06,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [293 Valid, 609 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-20 06:55:06,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1046 states. [2021-11-20 06:55:06,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1046 to 1038. [2021-11-20 06:55:06,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1038 states, 1037 states have (on average 1.5419479267116682) internal successors, (1599), 1037 states have internal predecessors, (1599), 0 states have call successors, (0), 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 06:55:06,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1038 states to 1038 states and 1599 transitions. [2021-11-20 06:55:06,431 INFO L78 Accepts]: Start accepts. Automaton has 1038 states and 1599 transitions. Word has length 127 [2021-11-20 06:55:06,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:55:06,432 INFO L470 AbstractCegarLoop]: Abstraction has 1038 states and 1599 transitions. [2021-11-20 06:55:06,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 0 states have call successors, (0), 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 06:55:06,432 INFO L276 IsEmpty]: Start isEmpty. Operand 1038 states and 1599 transitions. [2021-11-20 06:55:06,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-20 06:55:06,435 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:55:06,436 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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] [2021-11-20 06:55:06,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-20 06:55:06,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:55:06,655 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:55:06,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:55:06,655 INFO L85 PathProgramCache]: Analyzing trace with hash 841592010, now seen corresponding path program 1 times [2021-11-20 06:55:06,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:55:06,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1813892445] [2021-11-20 06:55:06,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:55:06,656 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:55:06,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:55:06,657 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:55:06,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-20 06:55:06,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:55:06,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 06:55:06,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:55:07,290 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-20 06:55:07,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:55:07,655 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-20 06:55:07,656 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:55:07,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1813892445] [2021-11-20 06:55:07,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1813892445] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:55:07,656 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:55:07,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-20 06:55:07,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386694569] [2021-11-20 06:55:07,656 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:55:07,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:55:07,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:55:07,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:55:07,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:55:07,658 INFO L87 Difference]: Start difference. First operand 1038 states and 1599 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 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 06:55:08,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:55:08,248 INFO L93 Difference]: Finished difference Result 2082 states and 3211 transitions. [2021-11-20 06:55:08,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:55:08,249 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 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 128 [2021-11-20 06:55:08,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:55:08,257 INFO L225 Difference]: With dead ends: 2082 [2021-11-20 06:55:08,257 INFO L226 Difference]: Without dead ends: 1065 [2021-11-20 06:55:08,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 253 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 06:55:08,260 INFO L933 BasicCegarLoop]: 226 mSDtfsCounter, 15 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:55:08,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 414 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-20 06:55:08,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1065 states. [2021-11-20 06:55:08,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1065 to 1065. [2021-11-20 06:55:08,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1065 states, 1064 states have (on average 1.5357142857142858) internal successors, (1634), 1064 states have internal predecessors, (1634), 0 states have call successors, (0), 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 06:55:08,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1065 states to 1065 states and 1634 transitions. [2021-11-20 06:55:08,316 INFO L78 Accepts]: Start accepts. Automaton has 1065 states and 1634 transitions. Word has length 128 [2021-11-20 06:55:08,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:55:08,317 INFO L470 AbstractCegarLoop]: Abstraction has 1065 states and 1634 transitions. [2021-11-20 06:55:08,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 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 06:55:08,317 INFO L276 IsEmpty]: Start isEmpty. Operand 1065 states and 1634 transitions. [2021-11-20 06:55:08,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-20 06:55:08,320 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:55:08,320 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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] [2021-11-20 06:55:08,344 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-20 06:55:08,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:55:08,537 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:55:08,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:55:08,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1300268468, now seen corresponding path program 1 times [2021-11-20 06:55:08,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:55:08,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [466222991] [2021-11-20 06:55:08,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:55:08,539 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:55:08,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:55:08,541 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:55:08,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-20 06:55:08,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:55:08,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 06:55:08,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:55:09,287 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-20 06:55:09,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:55:09,668 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-20 06:55:09,669 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:55:09,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [466222991] [2021-11-20 06:55:09,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [466222991] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:55:09,669 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:55:09,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-20 06:55:09,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470356115] [2021-11-20 06:55:09,669 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:55:09,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:55:09,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:55:09,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:55:09,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:55:09,671 INFO L87 Difference]: Start difference. First operand 1065 states and 1634 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 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 06:55:09,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:55:09,766 INFO L93 Difference]: Finished difference Result 2111 states and 3247 transitions. [2021-11-20 06:55:09,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:55:09,767 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 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 128 [2021-11-20 06:55:09,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:55:09,774 INFO L225 Difference]: With dead ends: 2111 [2021-11-20 06:55:09,774 INFO L226 Difference]: Without dead ends: 1067 [2021-11-20 06:55:09,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 253 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 06:55:09,777 INFO L933 BasicCegarLoop]: 214 mSDtfsCounter, 4 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:55:09,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 393 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:55:09,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1067 states. [2021-11-20 06:55:09,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1067 to 1067. [2021-11-20 06:55:09,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1067 states, 1066 states have (on average 1.5347091932457786) internal successors, (1636), 1066 states have internal predecessors, (1636), 0 states have call successors, (0), 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 06:55:09,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1067 states to 1067 states and 1636 transitions. [2021-11-20 06:55:09,824 INFO L78 Accepts]: Start accepts. Automaton has 1067 states and 1636 transitions. Word has length 128 [2021-11-20 06:55:09,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:55:09,825 INFO L470 AbstractCegarLoop]: Abstraction has 1067 states and 1636 transitions. [2021-11-20 06:55:09,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 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 06:55:09,825 INFO L276 IsEmpty]: Start isEmpty. Operand 1067 states and 1636 transitions. [2021-11-20 06:55:09,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-20 06:55:09,828 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:55:09,828 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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] [2021-11-20 06:55:09,845 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2021-11-20 06:55:10,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:55:10,046 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:55:10,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:55:10,046 INFO L85 PathProgramCache]: Analyzing trace with hash 821528815, now seen corresponding path program 1 times [2021-11-20 06:55:10,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:55:10,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [707793869] [2021-11-20 06:55:10,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:55:10,049 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:55:10,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:55:10,050 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:55:10,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-20 06:55:10,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:55:10,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:55:10,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:55:10,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:55:10,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:55:10,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:55:10,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:55:10,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:55:10,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:55:10,943 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-20 06:55:10,943 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 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-20 06:55:11,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:55:11,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:55:11,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:55:11,463 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-20 06:55:11,463 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 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-20 06:55:13,940 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-20 06:55:13,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-20 06:55:14,083 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 06:55:14,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:55:15,304 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 06:55:15,304 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:55:15,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [707793869] [2021-11-20 06:55:15,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [707793869] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:55:15,304 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:55:15,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 5 [2021-11-20 06:55:15,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892682755] [2021-11-20 06:55:15,305 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:55:15,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:55:15,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:55:15,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:55:15,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:55:15,306 INFO L87 Difference]: Start difference. First operand 1067 states and 1636 transitions. Second operand has 5 states, 5 states have (on average 31.2) internal successors, (156), 5 states have internal predecessors, (156), 0 states have call successors, (0), 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 06:55:17,333 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:55:26,879 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:55:32,243 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:55:37,712 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:55:38,941 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:55:39,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:55:39,092 INFO L93 Difference]: Finished difference Result 2332 states and 3567 transitions. [2021-11-20 06:55:39,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:55:39,095 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.2) internal successors, (156), 5 states have internal predecessors, (156), 0 states have call successors, (0), 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 130 [2021-11-20 06:55:39,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:55:39,110 INFO L225 Difference]: With dead ends: 2332 [2021-11-20 06:55:39,110 INFO L226 Difference]: Without dead ends: 1288 [2021-11-20 06:55:39,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 252 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:55:39,113 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 52 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 614 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:55:39,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 614 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 328 Invalid, 1 Unknown, 0 Unchecked, 23.7s Time] [2021-11-20 06:55:39,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1288 states. [2021-11-20 06:55:39,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1288 to 1194. [2021-11-20 06:55:39,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1194 states, 1193 states have (on average 1.5331098072087175) internal successors, (1829), 1193 states have internal predecessors, (1829), 0 states have call successors, (0), 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 06:55:39,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1194 states to 1194 states and 1829 transitions. [2021-11-20 06:55:39,162 INFO L78 Accepts]: Start accepts. Automaton has 1194 states and 1829 transitions. Word has length 130 [2021-11-20 06:55:39,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:55:39,162 INFO L470 AbstractCegarLoop]: Abstraction has 1194 states and 1829 transitions. [2021-11-20 06:55:39,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.2) internal successors, (156), 5 states have internal predecessors, (156), 0 states have call successors, (0), 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 06:55:39,163 INFO L276 IsEmpty]: Start isEmpty. Operand 1194 states and 1829 transitions. [2021-11-20 06:55:39,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-20 06:55:39,165 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:55:39,165 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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] [2021-11-20 06:55:39,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-20 06:55:39,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:55:39,380 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:55:39,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:55:39,380 INFO L85 PathProgramCache]: Analyzing trace with hash 235252593, now seen corresponding path program 1 times [2021-11-20 06:55:39,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:55:39,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [147056985] [2021-11-20 06:55:39,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:55:39,381 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:55:39,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:55:39,382 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:55:39,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-20 06:55:39,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:55:39,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:55:39,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:55:39,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:55:39,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:55:39,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:55:39,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:55:39,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:55:39,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:55:40,067 INFO L354 Elim1Store]: treesize reduction 190, result has 12.8 percent of original size [2021-11-20 06:55:40,067 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 3 case distinctions, treesize of input 32 treesize of output 38 [2021-11-20 06:55:40,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:55:40,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:55:40,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:55:40,488 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-20 06:55:40,488 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 13 case distinctions, treesize of input 70 treesize of output 87 [2021-11-20 06:55:41,748 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-20 06:55:41,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 108 treesize of output 36 [2021-11-20 06:55:41,924 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-20 06:55:41,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:55:42,709 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-20 06:55:42,709 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:55:42,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [147056985] [2021-11-20 06:55:42,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [147056985] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:55:42,710 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:55:42,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 5 [2021-11-20 06:55:42,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626764116] [2021-11-20 06:55:42,710 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:55:42,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:55:42,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:55:42,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:55:42,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:55:42,711 INFO L87 Difference]: Start difference. First operand 1194 states and 1829 transitions. Second operand has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 0 states have call successors, (0), 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 06:55:44,742 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:55:49,549 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:55:51,274 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:55:53,049 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:55:53,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:55:53,535 INFO L93 Difference]: Finished difference Result 2474 states and 3784 transitions. [2021-11-20 06:55:53,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:55:53,537 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 0 states have call successors, (0), 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 130 [2021-11-20 06:55:53,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:55:53,543 INFO L225 Difference]: With dead ends: 2474 [2021-11-20 06:55:53,543 INFO L226 Difference]: Without dead ends: 1303 [2021-11-20 06:55:53,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 252 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:55:53,546 INFO L933 BasicCegarLoop]: 238 mSDtfsCounter, 50 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:55:53,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 587 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 161 Invalid, 1 Unknown, 0 Unchecked, 10.7s Time] [2021-11-20 06:55:53,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1303 states. [2021-11-20 06:55:53,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1303 to 1266. [2021-11-20 06:55:53,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1266 states, 1265 states have (on average 1.5264822134387352) internal successors, (1931), 1265 states have internal predecessors, (1931), 0 states have call successors, (0), 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 06:55:53,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1266 states to 1266 states and 1931 transitions. [2021-11-20 06:55:53,609 INFO L78 Accepts]: Start accepts. Automaton has 1266 states and 1931 transitions. Word has length 130 [2021-11-20 06:55:53,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:55:53,609 INFO L470 AbstractCegarLoop]: Abstraction has 1266 states and 1931 transitions. [2021-11-20 06:55:53,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 0 states have call successors, (0), 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 06:55:53,610 INFO L276 IsEmpty]: Start isEmpty. Operand 1266 states and 1931 transitions. [2021-11-20 06:55:53,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-20 06:55:53,612 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:55:53,613 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2021-11-20 06:55:53,636 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-20 06:55:53,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:55:53,832 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:55:53,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:55:53,832 INFO L85 PathProgramCache]: Analyzing trace with hash 468516041, now seen corresponding path program 1 times [2021-11-20 06:55:53,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:55:53,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [106122873] [2021-11-20 06:55:53,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:55:53,833 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:55:53,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:55:53,834 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:55:53,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edf24074-f0c2-439c-9e55-a66e01ca6288/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-20 06:55:54,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:55:54,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:55:54,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:55:54,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:55:54,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:55:54,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:55:54,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:55:54,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:55:54,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:55:54,707 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-20 06:55:54,708 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 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-20 06:55:54,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:55:54,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:55:54,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:55:55,093 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-20 06:55:55,094 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 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-20 06:55:56,734 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-20 06:55:56,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-20 06:55:56,933 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-20 06:55:56,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:55:57,419 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-20 06:55:57,419 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:55:57,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [106122873] [2021-11-20 06:55:57,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [106122873] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:55:57,420 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:55:57,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-20 06:55:57,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461057689] [2021-11-20 06:55:57,420 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:55:57,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:55:57,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:55:57,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:55:57,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:55:57,421 INFO L87 Difference]: Start difference. First operand 1266 states and 1931 transitions. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 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 06:55:59,445 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:56:01,454 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:56:03,461 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:56:04,683 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers []