./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem13_label50.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_cf623a25-d353-40d5-8461-4a19f7687560/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf623a25-d353-40d5-8461-4a19f7687560/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_cf623a25-d353-40d5-8461-4a19f7687560/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf623a25-d353-40d5-8461-4a19f7687560/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem13_label50.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf623a25-d353-40d5-8461-4a19f7687560/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_cf623a25-d353-40d5-8461-4a19f7687560/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 c0a29c0650858169a7f06788e2d55d3441e7b25ce879ddd70ee1db162c004af4 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:15:27,088 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:15:27,092 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:15:27,160 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:15:27,161 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:15:27,165 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:15:27,167 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:15:27,172 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:15:27,175 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:15:27,181 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:15:27,183 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:15:27,185 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:15:27,186 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:15:27,189 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:15:27,192 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:15:27,198 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:15:27,204 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:15:27,206 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:15:27,209 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:15:27,219 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:15:27,222 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:15:27,224 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:15:27,228 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:15:27,230 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:15:27,242 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:15:27,243 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:15:27,244 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:15:27,246 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:15:27,247 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:15:27,249 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:15:27,250 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:15:27,252 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:15:27,255 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:15:27,257 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:15:27,259 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:15:27,260 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:15:27,261 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:15:27,261 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:15:27,262 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:15:27,264 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:15:27,265 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:15:27,266 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf623a25-d353-40d5-8461-4a19f7687560/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 06:15:27,327 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:15:27,328 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:15:27,329 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:15:27,329 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:15:27,331 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:15:27,332 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:15:27,333 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:15:27,333 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:15:27,333 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:15:27,334 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:15:27,335 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 06:15:27,336 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 06:15:27,336 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 06:15:27,336 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:15:27,337 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 06:15:27,337 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:15:27,337 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 06:15:27,337 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 06:15:27,338 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 06:15:27,338 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:15:27,338 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 06:15:27,339 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:15:27,339 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:15:27,339 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:15:27,340 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:15:27,340 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:15:27,340 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:15:27,341 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 06:15:27,341 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 06:15:27,341 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 06:15:27,342 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 06:15:27,342 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 06:15:27,342 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 06:15:27,343 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:15:27,343 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_cf623a25-d353-40d5-8461-4a19f7687560/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf623a25-d353-40d5-8461-4a19f7687560/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c0a29c0650858169a7f06788e2d55d3441e7b25ce879ddd70ee1db162c004af4 [2021-11-20 06:15:27,682 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:15:27,730 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:15:27,734 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:15:27,735 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:15:27,737 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:15:27,739 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf623a25-d353-40d5-8461-4a19f7687560/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/eca-rers2012/Problem13_label50.c [2021-11-20 06:15:27,839 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf623a25-d353-40d5-8461-4a19f7687560/bin/uautomizer-DQz5hQGWxF/data/870e2d33e/c7de7ea48d364b34a52dde8579e32256/FLAG8df385327 [2021-11-20 06:15:28,819 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:15:28,820 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf623a25-d353-40d5-8461-4a19f7687560/sv-benchmarks/c/eca-rers2012/Problem13_label50.c [2021-11-20 06:15:28,866 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf623a25-d353-40d5-8461-4a19f7687560/bin/uautomizer-DQz5hQGWxF/data/870e2d33e/c7de7ea48d364b34a52dde8579e32256/FLAG8df385327 [2021-11-20 06:15:29,219 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf623a25-d353-40d5-8461-4a19f7687560/bin/uautomizer-DQz5hQGWxF/data/870e2d33e/c7de7ea48d364b34a52dde8579e32256 [2021-11-20 06:15:29,221 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:15:29,223 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:15:29,229 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:15:29,229 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:15:29,233 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:15:29,234 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:15:29" (1/1) ... [2021-11-20 06:15:29,235 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@432f0634 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:15:29, skipping insertion in model container [2021-11-20 06:15:29,235 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:15:29" (1/1) ... [2021-11-20 06:15:29,245 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:15:29,478 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:15:29,992 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_cf623a25-d353-40d5-8461-4a19f7687560/sv-benchmarks/c/eca-rers2012/Problem13_label50.c[8814,8827] [2021-11-20 06:15:31,317 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:15:31,337 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:15:31,394 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_cf623a25-d353-40d5-8461-4a19f7687560/sv-benchmarks/c/eca-rers2012/Problem13_label50.c[8814,8827] [2021-11-20 06:15:32,230 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:15:32,266 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:15:32,267 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:15:32 WrapperNode [2021-11-20 06:15:32,267 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:15:32,268 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:15:32,268 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:15:32,269 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:15:32,278 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:15:32" (1/1) ... [2021-11-20 06:15:32,416 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:15:32" (1/1) ... [2021-11-20 06:15:33,548 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5583 [2021-11-20 06:15:33,562 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:15:33,563 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:15:33,563 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:15:33,563 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:15:33,575 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:15:32" (1/1) ... [2021-11-20 06:15:33,575 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:15:32" (1/1) ... [2021-11-20 06:15:33,778 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:15:32" (1/1) ... [2021-11-20 06:15:33,778 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:15:32" (1/1) ... [2021-11-20 06:15:34,161 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:15:32" (1/1) ... [2021-11-20 06:15:34,199 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:15:32" (1/1) ... [2021-11-20 06:15:34,301 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:15:32" (1/1) ... [2021-11-20 06:15:34,398 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:15:34,399 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:15:34,400 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:15:34,400 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:15:34,401 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:15:32" (1/1) ... [2021-11-20 06:15:34,410 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:15:34,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf623a25-d353-40d5-8461-4a19f7687560/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:15:34,445 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf623a25-d353-40d5-8461-4a19f7687560/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:15:34,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf623a25-d353-40d5-8461-4a19f7687560/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:15:34,511 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 06:15:34,511 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 06:15:34,512 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:15:34,512 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:15:34,617 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:15:34,619 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:15:42,186 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:15:42,225 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:15:42,225 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-20 06:15:42,231 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:15:42 BoogieIcfgContainer [2021-11-20 06:15:42,231 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:15:42,234 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:15:42,235 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:15:42,239 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:15:42,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:15:29" (1/3) ... [2021-11-20 06:15:42,241 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61742cef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:15:42, skipping insertion in model container [2021-11-20 06:15:42,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:15:32" (2/3) ... [2021-11-20 06:15:42,242 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61742cef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:15:42, skipping insertion in model container [2021-11-20 06:15:42,242 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:15:42" (3/3) ... [2021-11-20 06:15:42,244 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label50.c [2021-11-20 06:15:42,252 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:15:42,252 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 06:15:42,344 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:15:42,356 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 06:15:42,356 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 06:15:42,424 INFO L276 IsEmpty]: Start isEmpty. Operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:15:42,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-20 06:15:42,435 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:15:42,436 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:15:42,436 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:15:42,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:15:42,443 INFO L85 PathProgramCache]: Analyzing trace with hash 531730986, now seen corresponding path program 1 times [2021-11-20 06:15:42,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:15:42,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204509296] [2021-11-20 06:15:42,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:15:42,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:15:42,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:15:43,005 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 06:15:43,005 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:15:43,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204509296] [2021-11-20 06:15:43,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204509296] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:15:43,007 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:15:43,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:15:43,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55788901] [2021-11-20 06:15:43,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:15:43,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:15:43,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:15:43,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:15:43,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:15:43,069 INFO L87 Difference]: Start difference. First operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 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 15.5) internal successors, (62), 3 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 06:15:53,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:15:53,315 INFO L93 Difference]: Finished difference Result 3829 states and 7206 transitions. [2021-11-20 06:15:53,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:15:53,318 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 3 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 06:15:53,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:15:53,358 INFO L225 Difference]: With dead ends: 3829 [2021-11-20 06:15:53,358 INFO L226 Difference]: Without dead ends: 2664 [2021-11-20 06:15:53,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:15:53,372 INFO L933 BasicCegarLoop]: 761 mSDtfsCounter, 2666 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 4246 mSolverCounterSat, 1610 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2666 SdHoareTripleChecker+Valid, 1067 SdHoareTripleChecker+Invalid, 5856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1610 IncrementalHoareTripleChecker+Valid, 4246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:15:53,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2666 Valid, 1067 Invalid, 5856 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1610 Valid, 4246 Invalid, 0 Unknown, 0 Unchecked, 9.7s Time] [2021-11-20 06:15:53,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2664 states. [2021-11-20 06:15:53,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2664 to 2663. [2021-11-20 06:15:53,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2663 states, 2662 states have (on average 1.460931630353118) internal successors, (3889), 2662 states have internal predecessors, (3889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:15:53,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2663 states to 2663 states and 3889 transitions. [2021-11-20 06:15:53,630 INFO L78 Accepts]: Start accepts. Automaton has 2663 states and 3889 transitions. Word has length 62 [2021-11-20 06:15:53,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:15:53,632 INFO L470 AbstractCegarLoop]: Abstraction has 2663 states and 3889 transitions. [2021-11-20 06:15:53,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 3 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 06:15:53,633 INFO L276 IsEmpty]: Start isEmpty. Operand 2663 states and 3889 transitions. [2021-11-20 06:15:53,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-11-20 06:15:53,656 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:15:53,657 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:15:53,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 06:15:53,658 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:15:53,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:15:53,662 INFO L85 PathProgramCache]: Analyzing trace with hash 354009653, now seen corresponding path program 1 times [2021-11-20 06:15:53,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:15:53,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594033001] [2021-11-20 06:15:53,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:15:53,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:15:53,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:15:54,023 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:15:54,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:15:54,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594033001] [2021-11-20 06:15:54,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594033001] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:15:54,024 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:15:54,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:15:54,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816277471] [2021-11-20 06:15:54,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:15:54,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:15:54,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:15:54,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:15:54,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:15:54,029 INFO L87 Difference]: Start difference. First operand 2663 states and 3889 transitions. Second operand has 4 states, 4 states have (on average 46.75) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:16:04,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:16:04,245 INFO L93 Difference]: Finished difference Result 7864 states and 12669 transitions. [2021-11-20 06:16:04,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:16:04,252 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 46.75) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 187 [2021-11-20 06:16:04,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:16:04,299 INFO L225 Difference]: With dead ends: 7864 [2021-11-20 06:16:04,299 INFO L226 Difference]: Without dead ends: 5990 [2021-11-20 06:16:04,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:16:04,306 INFO L933 BasicCegarLoop]: 894 mSDtfsCounter, 1617 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 6333 mSolverCounterSat, 831 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1617 SdHoareTripleChecker+Valid, 1191 SdHoareTripleChecker+Invalid, 7164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 831 IncrementalHoareTripleChecker+Valid, 6333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.9s IncrementalHoareTripleChecker+Time [2021-11-20 06:16:04,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1617 Valid, 1191 Invalid, 7164 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [831 Valid, 6333 Invalid, 0 Unknown, 0 Unchecked, 9.9s Time] [2021-11-20 06:16:04,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5990 states. [2021-11-20 06:16:04,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5990 to 5859. [2021-11-20 06:16:04,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5859 states, 5858 states have (on average 1.4452031410037556) internal successors, (8466), 5858 states have internal predecessors, (8466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:16:04,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5859 states to 5859 states and 8466 transitions. [2021-11-20 06:16:04,488 INFO L78 Accepts]: Start accepts. Automaton has 5859 states and 8466 transitions. Word has length 187 [2021-11-20 06:16:04,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:16:04,493 INFO L470 AbstractCegarLoop]: Abstraction has 5859 states and 8466 transitions. [2021-11-20 06:16:04,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.75) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:16:04,494 INFO L276 IsEmpty]: Start isEmpty. Operand 5859 states and 8466 transitions. [2021-11-20 06:16:04,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2021-11-20 06:16:04,503 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:16:04,505 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-20 06:16:04,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 06:16:04,509 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:16:04,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:16:04,510 INFO L85 PathProgramCache]: Analyzing trace with hash 747152322, now seen corresponding path program 1 times [2021-11-20 06:16:04,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:16:04,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793654104] [2021-11-20 06:16:04,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:16:04,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:16:04,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:16:04,814 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-20 06:16:04,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:16:04,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793654104] [2021-11-20 06:16:04,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793654104] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:16:04,816 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:16:04,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:16:04,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488315601] [2021-11-20 06:16:04,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:16:04,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:16:04,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:16:04,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:16:04,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:16:04,822 INFO L87 Difference]: Start difference. First operand 5859 states and 8466 transitions. Second operand has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 2 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:16:09,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:16:09,653 INFO L93 Difference]: Finished difference Result 15687 states and 23390 transitions. [2021-11-20 06:16:09,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:16:09,653 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 2 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 229 [2021-11-20 06:16:09,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:16:09,722 INFO L225 Difference]: With dead ends: 15687 [2021-11-20 06:16:09,723 INFO L226 Difference]: Without dead ends: 10617 [2021-11-20 06:16:09,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:16:09,733 INFO L933 BasicCegarLoop]: 785 mSDtfsCounter, 919 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 2554 mSolverCounterSat, 756 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 919 SdHoareTripleChecker+Valid, 918 SdHoareTripleChecker+Invalid, 3310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 756 IncrementalHoareTripleChecker+Valid, 2554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:16:09,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [919 Valid, 918 Invalid, 3310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [756 Valid, 2554 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2021-11-20 06:16:09,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10617 states. [2021-11-20 06:16:09,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10617 to 10608. [2021-11-20 06:16:10,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10608 states, 10607 states have (on average 1.3551428302064674) internal successors, (14374), 10607 states have internal predecessors, (14374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:16:10,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10608 states to 10608 states and 14374 transitions. [2021-11-20 06:16:10,047 INFO L78 Accepts]: Start accepts. Automaton has 10608 states and 14374 transitions. Word has length 229 [2021-11-20 06:16:10,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:16:10,050 INFO L470 AbstractCegarLoop]: Abstraction has 10608 states and 14374 transitions. [2021-11-20 06:16:10,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 2 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:16:10,052 INFO L276 IsEmpty]: Start isEmpty. Operand 10608 states and 14374 transitions. [2021-11-20 06:16:10,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2021-11-20 06:16:10,060 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:16:10,061 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:16:10,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 06:16:10,063 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:16:10,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:16:10,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1134775617, now seen corresponding path program 1 times [2021-11-20 06:16:10,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:16:10,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197340020] [2021-11-20 06:16:10,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:16:10,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:16:10,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:16:10,316 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-20 06:16:10,317 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:16:10,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197340020] [2021-11-20 06:16:10,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197340020] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:16:10,318 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:16:10,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:16:10,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064665542] [2021-11-20 06:16:10,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:16:10,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:16:10,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:16:10,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:16:10,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:16:10,321 INFO L87 Difference]: Start difference. First operand 10608 states and 14374 transitions. Second operand has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 2 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:16:15,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:16:15,171 INFO L93 Difference]: Finished difference Result 28351 states and 39240 transitions. [2021-11-20 06:16:15,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:16:15,172 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 2 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 243 [2021-11-20 06:16:15,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:16:15,251 INFO L225 Difference]: With dead ends: 28351 [2021-11-20 06:16:15,251 INFO L226 Difference]: Without dead ends: 18532 [2021-11-20 06:16:15,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:16:15,269 INFO L933 BasicCegarLoop]: 448 mSDtfsCounter, 909 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 2872 mSolverCounterSat, 544 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 909 SdHoareTripleChecker+Valid, 613 SdHoareTripleChecker+Invalid, 3416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 544 IncrementalHoareTripleChecker+Valid, 2872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:16:15,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [909 Valid, 613 Invalid, 3416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [544 Valid, 2872 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2021-11-20 06:16:15,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18532 states. [2021-11-20 06:16:15,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18532 to 18523. [2021-11-20 06:16:15,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18523 states, 18522 states have (on average 1.3251268761472843) internal successors, (24544), 18522 states have internal predecessors, (24544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:16:15,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18523 states to 18523 states and 24544 transitions. [2021-11-20 06:16:15,747 INFO L78 Accepts]: Start accepts. Automaton has 18523 states and 24544 transitions. Word has length 243 [2021-11-20 06:16:15,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:16:15,748 INFO L470 AbstractCegarLoop]: Abstraction has 18523 states and 24544 transitions. [2021-11-20 06:16:15,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 2 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:16:15,750 INFO L276 IsEmpty]: Start isEmpty. Operand 18523 states and 24544 transitions. [2021-11-20 06:16:15,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2021-11-20 06:16:15,756 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:16:15,757 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:16:15,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 06:16:15,758 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:16:15,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:16:15,759 INFO L85 PathProgramCache]: Analyzing trace with hash -251504526, now seen corresponding path program 1 times [2021-11-20 06:16:15,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:16:15,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999375332] [2021-11-20 06:16:15,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:16:15,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:16:15,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:16:16,040 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 214 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:16:16,040 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:16:16,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999375332] [2021-11-20 06:16:16,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999375332] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:16:16,042 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:16:16,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:16:16,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778581248] [2021-11-20 06:16:16,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:16:16,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:16:16,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:16:16,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:16:16,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:16:16,048 INFO L87 Difference]: Start difference. First operand 18523 states and 24544 transitions. Second operand has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 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 06:16:21,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:16:21,028 INFO L93 Difference]: Finished difference Result 52015 states and 69799 transitions. [2021-11-20 06:16:21,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:16:21,038 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 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) Word has length 261 [2021-11-20 06:16:21,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:16:21,138 INFO L225 Difference]: With dead ends: 52015 [2021-11-20 06:16:21,139 INFO L226 Difference]: Without dead ends: 34281 [2021-11-20 06:16:21,165 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 06:16:21,166 INFO L933 BasicCegarLoop]: 833 mSDtfsCounter, 851 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 2393 mSolverCounterSat, 915 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 851 SdHoareTripleChecker+Valid, 952 SdHoareTripleChecker+Invalid, 3308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 915 IncrementalHoareTripleChecker+Valid, 2393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:16:21,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [851 Valid, 952 Invalid, 3308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [915 Valid, 2393 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2021-11-20 06:16:21,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34281 states. [2021-11-20 06:16:21,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34281 to 34271. [2021-11-20 06:16:21,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34271 states, 34270 states have (on average 1.2549168368835717) internal successors, (43006), 34270 states have internal predecessors, (43006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:16:21,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34271 states to 34271 states and 43006 transitions. [2021-11-20 06:16:21,832 INFO L78 Accepts]: Start accepts. Automaton has 34271 states and 43006 transitions. Word has length 261 [2021-11-20 06:16:21,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:16:21,834 INFO L470 AbstractCegarLoop]: Abstraction has 34271 states and 43006 transitions. [2021-11-20 06:16:21,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 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 06:16:21,841 INFO L276 IsEmpty]: Start isEmpty. Operand 34271 states and 43006 transitions. [2021-11-20 06:16:21,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2021-11-20 06:16:21,849 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:16:21,850 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:16:21,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 06:16:21,850 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:16:21,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:16:21,852 INFO L85 PathProgramCache]: Analyzing trace with hash -341439997, now seen corresponding path program 1 times [2021-11-20 06:16:21,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:16:21,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442961727] [2021-11-20 06:16:21,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:16:21,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:16:21,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:16:22,104 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-11-20 06:16:22,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:16:22,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442961727] [2021-11-20 06:16:22,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442961727] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:16:22,105 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:16:22,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:16:22,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555685168] [2021-11-20 06:16:22,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:16:22,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:16:22,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:16:22,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:16:22,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:16:22,108 INFO L87 Difference]: Start difference. First operand 34271 states and 43006 transitions. Second operand has 3 states, 3 states have (on average 63.0) internal successors, (189), 2 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:16:27,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:16:27,549 INFO L93 Difference]: Finished difference Result 92929 states and 117608 transitions. [2021-11-20 06:16:27,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:16:27,550 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 2 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 292 [2021-11-20 06:16:27,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:16:27,683 INFO L225 Difference]: With dead ends: 92929 [2021-11-20 06:16:27,683 INFO L226 Difference]: Without dead ends: 59447 [2021-11-20 06:16:27,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:16:27,718 INFO L933 BasicCegarLoop]: 839 mSDtfsCounter, 857 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 2308 mSolverCounterSat, 869 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 857 SdHoareTripleChecker+Valid, 986 SdHoareTripleChecker+Invalid, 3177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 869 IncrementalHoareTripleChecker+Valid, 2308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:16:27,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [857 Valid, 986 Invalid, 3177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [869 Valid, 2308 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2021-11-20 06:16:27,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59447 states. [2021-11-20 06:16:28,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59447 to 56294. [2021-11-20 06:16:29,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56294 states, 56293 states have (on average 1.2005045032242019) internal successors, (67580), 56293 states have internal predecessors, (67580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:16:29,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56294 states to 56294 states and 67580 transitions. [2021-11-20 06:16:29,195 INFO L78 Accepts]: Start accepts. Automaton has 56294 states and 67580 transitions. Word has length 292 [2021-11-20 06:16:29,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:16:29,196 INFO L470 AbstractCegarLoop]: Abstraction has 56294 states and 67580 transitions. [2021-11-20 06:16:29,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 2 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:16:29,196 INFO L276 IsEmpty]: Start isEmpty. Operand 56294 states and 67580 transitions. [2021-11-20 06:16:29,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2021-11-20 06:16:29,208 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:16:29,209 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-20 06:16:29,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 06:16:29,209 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:16:29,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:16:29,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1187004232, now seen corresponding path program 1 times [2021-11-20 06:16:29,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:16:29,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996975112] [2021-11-20 06:16:29,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:16:29,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:16:29,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:16:29,582 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 179 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-11-20 06:16:29,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:16:29,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996975112] [2021-11-20 06:16:29,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996975112] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:16:29,583 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:16:29,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:16:29,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264332119] [2021-11-20 06:16:29,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:16:29,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:16:29,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:16:29,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:16:29,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:16:29,587 INFO L87 Difference]: Start difference. First operand 56294 states and 67580 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:16:35,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:16:35,163 INFO L93 Difference]: Finished difference Result 133057 states and 162012 transitions. [2021-11-20 06:16:35,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:16:35,164 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 350 [2021-11-20 06:16:35,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:16:35,298 INFO L225 Difference]: With dead ends: 133057 [2021-11-20 06:16:35,298 INFO L226 Difference]: Without dead ends: 77552 [2021-11-20 06:16:35,331 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 06:16:35,336 INFO L933 BasicCegarLoop]: 1796 mSDtfsCounter, 808 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 2542 mSolverCounterSat, 723 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 808 SdHoareTripleChecker+Valid, 1947 SdHoareTripleChecker+Invalid, 3265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 723 IncrementalHoareTripleChecker+Valid, 2542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:16:35,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [808 Valid, 1947 Invalid, 3265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [723 Valid, 2542 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2021-11-20 06:16:35,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77552 states. [2021-11-20 06:16:36,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77552 to 76759. [2021-11-20 06:16:36,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76759 states, 76758 states have (on average 1.1668099742046432) internal successors, (89562), 76758 states have internal predecessors, (89562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:16:37,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76759 states to 76759 states and 89562 transitions. [2021-11-20 06:16:37,331 INFO L78 Accepts]: Start accepts. Automaton has 76759 states and 89562 transitions. Word has length 350 [2021-11-20 06:16:37,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:16:37,332 INFO L470 AbstractCegarLoop]: Abstraction has 76759 states and 89562 transitions. [2021-11-20 06:16:37,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:16:37,332 INFO L276 IsEmpty]: Start isEmpty. Operand 76759 states and 89562 transitions. [2021-11-20 06:16:37,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2021-11-20 06:16:37,359 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:16:37,360 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-20 06:16:37,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-20 06:16:37,361 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:16:37,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:16:37,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1602599278, now seen corresponding path program 1 times [2021-11-20 06:16:37,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:16:37,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049740899] [2021-11-20 06:16:37,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:16:37,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:16:37,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:16:37,536 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 409 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-20 06:16:37,536 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:16:37,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049740899] [2021-11-20 06:16:37,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049740899] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:16:37,537 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:16:37,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:16:37,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487786764] [2021-11-20 06:16:37,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:16:37,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:16:37,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:16:37,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:16:37,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:16:37,538 INFO L87 Difference]: Start difference. First operand 76759 states and 89562 transitions. Second operand has 4 states, 4 states have (on average 75.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:16:47,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:16:47,837 INFO L93 Difference]: Finished difference Result 205688 states and 241921 transitions. [2021-11-20 06:16:47,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:16:47,838 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 75.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 359 [2021-11-20 06:16:47,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:16:48,045 INFO L225 Difference]: With dead ends: 205688 [2021-11-20 06:16:48,046 INFO L226 Difference]: Without dead ends: 129718 [2021-11-20 06:16:48,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:16:48,100 INFO L933 BasicCegarLoop]: 465 mSDtfsCounter, 1736 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 6653 mSolverCounterSat, 1133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1736 SdHoareTripleChecker+Valid, 707 SdHoareTripleChecker+Invalid, 7786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1133 IncrementalHoareTripleChecker+Valid, 6653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:16:48,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1736 Valid, 707 Invalid, 7786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1133 Valid, 6653 Invalid, 0 Unknown, 0 Unchecked, 9.4s Time] [2021-11-20 06:16:48,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129718 states. [2021-11-20 06:16:49,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129718 to 128793. [2021-11-20 06:16:50,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128793 states, 128792 states have (on average 1.162339275731412) internal successors, (149700), 128792 states have internal predecessors, (149700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:16:50,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128793 states to 128793 states and 149700 transitions. [2021-11-20 06:16:50,745 INFO L78 Accepts]: Start accepts. Automaton has 128793 states and 149700 transitions. Word has length 359 [2021-11-20 06:16:50,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:16:50,746 INFO L470 AbstractCegarLoop]: Abstraction has 128793 states and 149700 transitions. [2021-11-20 06:16:50,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 75.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:16:50,747 INFO L276 IsEmpty]: Start isEmpty. Operand 128793 states and 149700 transitions. [2021-11-20 06:16:50,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2021-11-20 06:16:50,771 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:16:50,772 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-20 06:16:50,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-20 06:16:50,772 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:16:50,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:16:50,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1513951045, now seen corresponding path program 1 times [2021-11-20 06:16:50,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:16:50,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880834948] [2021-11-20 06:16:50,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:16:50,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:16:50,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:16:51,021 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 288 proven. 0 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-11-20 06:16:51,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:16:51,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880834948] [2021-11-20 06:16:51,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880834948] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:16:51,022 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:16:51,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:16:51,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619858872] [2021-11-20 06:16:51,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:16:51,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:16:51,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:16:51,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:16:51,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:16:51,026 INFO L87 Difference]: Start difference. First operand 128793 states and 149700 transitions. Second operand has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:16:56,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:16:56,320 INFO L93 Difference]: Finished difference Result 240271 states and 281024 transitions. [2021-11-20 06:16:56,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:16:56,321 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 359 [2021-11-20 06:16:56,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:16:56,845 INFO L225 Difference]: With dead ends: 240271 [2021-11-20 06:16:56,845 INFO L226 Difference]: Without dead ends: 128806 [2021-11-20 06:16:56,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:16:56,937 INFO L933 BasicCegarLoop]: 1019 mSDtfsCounter, 730 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 2705 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 730 SdHoareTripleChecker+Valid, 1199 SdHoareTripleChecker+Invalid, 2709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 2705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:16:56,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [730 Valid, 1199 Invalid, 2709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 2705 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2021-11-20 06:16:57,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128806 states. [2021-11-20 06:16:58,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128806 to 128006. [2021-11-20 06:16:58,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128006 states, 128005 states have (on average 1.1624389672278426) internal successors, (148798), 128005 states have internal predecessors, (148798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:16:59,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128006 states to 128006 states and 148798 transitions. [2021-11-20 06:16:59,125 INFO L78 Accepts]: Start accepts. Automaton has 128006 states and 148798 transitions. Word has length 359 [2021-11-20 06:16:59,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:16:59,126 INFO L470 AbstractCegarLoop]: Abstraction has 128006 states and 148798 transitions. [2021-11-20 06:16:59,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:16:59,127 INFO L276 IsEmpty]: Start isEmpty. Operand 128006 states and 148798 transitions. [2021-11-20 06:16:59,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 389 [2021-11-20 06:16:59,140 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:16:59,141 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:16:59,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-20 06:16:59,141 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:16:59,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:16:59,142 INFO L85 PathProgramCache]: Analyzing trace with hash 558961745, now seen corresponding path program 1 times [2021-11-20 06:16:59,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:16:59,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225647082] [2021-11-20 06:16:59,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:16:59,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:16:59,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:16:59,729 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 288 proven. 113 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-20 06:16:59,729 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:16:59,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225647082] [2021-11-20 06:16:59,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225647082] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:16:59,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863623132] [2021-11-20 06:16:59,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:16:59,731 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:16:59,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf623a25-d353-40d5-8461-4a19f7687560/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:16:59,734 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf623a25-d353-40d5-8461-4a19f7687560/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:16:59,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf623a25-d353-40d5-8461-4a19f7687560/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 06:16:59,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:16:59,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 06:16:59,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:17:01,138 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 288 proven. 0 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2021-11-20 06:17:01,139 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:17:01,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863623132] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:17:01,140 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:17:01,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2021-11-20 06:17:01,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177199161] [2021-11-20 06:17:01,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:17:01,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:17:01,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:17:01,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:17:01,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:17:01,146 INFO L87 Difference]: Start difference. First operand 128006 states and 148798 transitions. Second operand has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:17:06,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:17:06,719 INFO L93 Difference]: Finished difference Result 254434 states and 295649 transitions. [2021-11-20 06:17:06,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:17:06,720 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 388 [2021-11-20 06:17:06,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:17:06,886 INFO L225 Difference]: With dead ends: 254434 [2021-11-20 06:17:06,886 INFO L226 Difference]: Without dead ends: 127217 [2021-11-20 06:17:06,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 387 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:17:06,947 INFO L933 BasicCegarLoop]: 1363 mSDtfsCounter, 1122 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 2466 mSolverCounterSat, 450 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1122 SdHoareTripleChecker+Valid, 1444 SdHoareTripleChecker+Invalid, 2916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 450 IncrementalHoareTripleChecker+Valid, 2466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:17:06,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1122 Valid, 1444 Invalid, 2916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [450 Valid, 2466 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2021-11-20 06:17:07,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127217 states. [2021-11-20 06:17:09,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127217 to 127216. [2021-11-20 06:17:09,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127216 states, 127215 states have (on average 1.1196792831034077) internal successors, (142440), 127215 states have internal predecessors, (142440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:17:09,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127216 states to 127216 states and 142440 transitions. [2021-11-20 06:17:09,317 INFO L78 Accepts]: Start accepts. Automaton has 127216 states and 142440 transitions. Word has length 388 [2021-11-20 06:17:09,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:17:09,318 INFO L470 AbstractCegarLoop]: Abstraction has 127216 states and 142440 transitions. [2021-11-20 06:17:09,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:17:09,319 INFO L276 IsEmpty]: Start isEmpty. Operand 127216 states and 142440 transitions. [2021-11-20 06:17:09,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 457 [2021-11-20 06:17:09,343 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:17:09,344 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:17:09,388 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf623a25-d353-40d5-8461-4a19f7687560/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-20 06:17:09,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf623a25-d353-40d5-8461-4a19f7687560/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-20 06:17:09,558 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:17:09,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:17:09,559 INFO L85 PathProgramCache]: Analyzing trace with hash -684842412, now seen corresponding path program 1 times [2021-11-20 06:17:09,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:17:09,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471977781] [2021-11-20 06:17:09,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:17:09,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:17:09,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:17:09,840 INFO L134 CoverageAnalysis]: Checked inductivity of 738 backedges. 466 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-11-20 06:17:09,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:17:09,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471977781] [2021-11-20 06:17:09,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471977781] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:17:09,841 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:17:09,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:17:09,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566934511] [2021-11-20 06:17:09,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:17:09,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:17:09,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:17:09,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:17:09,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:17:09,845 INFO L87 Difference]: Start difference. First operand 127216 states and 142440 transitions. Second operand has 3 states, 3 states have (on average 91.33333333333333) internal successors, (274), 3 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:17:15,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:17:15,857 INFO L93 Difference]: Finished difference Result 279629 states and 316499 transitions. [2021-11-20 06:17:15,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:17:15,858 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 91.33333333333333) internal successors, (274), 3 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 456 [2021-11-20 06:17:15,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:17:16,060 INFO L225 Difference]: With dead ends: 279629 [2021-11-20 06:17:16,061 INFO L226 Difference]: Without dead ends: 153202 [2021-11-20 06:17:16,124 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 06:17:16,125 INFO L933 BasicCegarLoop]: 1759 mSDtfsCounter, 787 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 2534 mSolverCounterSat, 714 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 787 SdHoareTripleChecker+Valid, 1913 SdHoareTripleChecker+Invalid, 3248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 714 IncrementalHoareTripleChecker+Valid, 2534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:17:16,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [787 Valid, 1913 Invalid, 3248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [714 Valid, 2534 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2021-11-20 06:17:16,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153202 states. [2021-11-20 06:17:18,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153202 to 150820. [2021-11-20 06:17:18,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150820 states, 150819 states have (on average 1.1036474184287126) internal successors, (166451), 150819 states have internal predecessors, (166451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:17:19,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150820 states to 150820 states and 166451 transitions. [2021-11-20 06:17:19,083 INFO L78 Accepts]: Start accepts. Automaton has 150820 states and 166451 transitions. Word has length 456 [2021-11-20 06:17:19,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:17:19,105 INFO L470 AbstractCegarLoop]: Abstraction has 150820 states and 166451 transitions. [2021-11-20 06:17:19,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.33333333333333) internal successors, (274), 3 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:17:19,106 INFO L276 IsEmpty]: Start isEmpty. Operand 150820 states and 166451 transitions. [2021-11-20 06:17:19,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 467 [2021-11-20 06:17:19,173 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:17:19,174 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:17:19,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-20 06:17:19,186 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:17:19,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:17:19,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1115352886, now seen corresponding path program 1 times [2021-11-20 06:17:19,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:17:19,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523617658] [2021-11-20 06:17:19,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:17:19,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:17:19,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:17:19,702 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-11-20 06:17:19,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:17:19,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523617658] [2021-11-20 06:17:19,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523617658] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:17:19,703 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:17:19,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:17:19,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372545775] [2021-11-20 06:17:19,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:17:19,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:17:19,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:17:19,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:17:19,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:17:19,706 INFO L87 Difference]: Start difference. First operand 150820 states and 166451 transitions. Second operand has 3 states, 3 states have (on average 124.0) internal successors, (372), 3 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 06:17:26,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:17:26,800 INFO L93 Difference]: Finished difference Result 365544 states and 404234 transitions. [2021-11-20 06:17:26,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:17:26,801 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 124.0) internal successors, (372), 3 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) Word has length 466 [2021-11-20 06:17:26,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:17:27,084 INFO L225 Difference]: With dead ends: 365544 [2021-11-20 06:17:27,085 INFO L226 Difference]: Without dead ends: 215513 [2021-11-20 06:17:27,155 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 06:17:27,156 INFO L933 BasicCegarLoop]: 475 mSDtfsCounter, 962 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 3084 mSolverCounterSat, 674 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 962 SdHoareTripleChecker+Valid, 580 SdHoareTripleChecker+Invalid, 3758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 674 IncrementalHoareTripleChecker+Valid, 3084 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:17:27,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [962 Valid, 580 Invalid, 3758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [674 Valid, 3084 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2021-11-20 06:17:27,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215513 states. [2021-11-20 06:17:30,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215513 to 214616. [2021-11-20 06:17:30,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214616 states, 214615 states have (on average 1.1051184679542436) internal successors, (237175), 214615 states have internal predecessors, (237175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:17:31,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214616 states to 214616 states and 237175 transitions. [2021-11-20 06:17:31,347 INFO L78 Accepts]: Start accepts. Automaton has 214616 states and 237175 transitions. Word has length 466 [2021-11-20 06:17:31,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:17:31,348 INFO L470 AbstractCegarLoop]: Abstraction has 214616 states and 237175 transitions. [2021-11-20 06:17:31,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 124.0) internal successors, (372), 3 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 06:17:31,349 INFO L276 IsEmpty]: Start isEmpty. Operand 214616 states and 237175 transitions. [2021-11-20 06:17:31,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2021-11-20 06:17:31,370 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:17:31,371 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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 06:17:31,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-20 06:17:31,372 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:17:31,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:17:31,372 INFO L85 PathProgramCache]: Analyzing trace with hash -339615217, now seen corresponding path program 1 times [2021-11-20 06:17:31,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:17:31,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27105877] [2021-11-20 06:17:31,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:17:31,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:17:31,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:17:31,825 INFO L134 CoverageAnalysis]: Checked inductivity of 530 backedges. 360 proven. 110 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-20 06:17:31,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:17:31,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27105877] [2021-11-20 06:17:31,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27105877] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:17:31,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964716943] [2021-11-20 06:17:31,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:17:31,827 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:17:31,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf623a25-d353-40d5-8461-4a19f7687560/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:17:31,828 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf623a25-d353-40d5-8461-4a19f7687560/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:17:31,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf623a25-d353-40d5-8461-4a19f7687560/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 06:17:32,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:17:32,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 627 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:17:32,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:17:33,059 INFO L134 CoverageAnalysis]: Checked inductivity of 530 backedges. 357 proven. 0 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2021-11-20 06:17:33,060 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:17:33,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964716943] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:17:33,060 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:17:33,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-11-20 06:17:33,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59708544] [2021-11-20 06:17:33,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:17:33,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:17:33,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:17:33,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:17:33,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:17:33,064 INFO L87 Difference]: Start difference. First operand 214616 states and 237175 transitions. Second operand has 3 states, 3 states have (on average 102.33333333333333) internal successors, (307), 3 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:17:41,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:17:41,067 INFO L93 Difference]: Finished difference Result 463052 states and 513272 transitions. [2021-11-20 06:17:41,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:17:41,068 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 102.33333333333333) internal successors, (307), 3 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 478 [2021-11-20 06:17:41,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:17:41,524 INFO L225 Difference]: With dead ends: 463052 [2021-11-20 06:17:41,524 INFO L226 Difference]: Without dead ends: 267336 [2021-11-20 06:17:41,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 477 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:17:41,662 INFO L933 BasicCegarLoop]: 1646 mSDtfsCounter, 937 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 2662 mSolverCounterSat, 759 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 937 SdHoareTripleChecker+Valid, 1762 SdHoareTripleChecker+Invalid, 3421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 759 IncrementalHoareTripleChecker+Valid, 2662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:17:41,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [937 Valid, 1762 Invalid, 3421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [759 Valid, 2662 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2021-11-20 06:17:41,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267336 states.