./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-lopstr16/flag_loopdep_simple.i --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_06f81992-e001-47f1-ae90-e889ef92da35/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f81992-e001-47f1-ae90-e889ef92da35/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_06f81992-e001-47f1-ae90-e889ef92da35/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f81992-e001-47f1-ae90-e889ef92da35/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-lopstr16/flag_loopdep_simple.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f81992-e001-47f1-ae90-e889ef92da35/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_06f81992-e001-47f1-ae90-e889ef92da35/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 2e1c46549da470f14361a9b2a5fb79d079bbffb4006138f4fef05b9b152f9be7 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:48:59,293 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:48:59,296 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:48:59,340 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:48:59,341 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:48:59,343 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:48:59,345 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:48:59,348 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:48:59,351 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:48:59,352 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:48:59,354 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:48:59,356 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:48:59,357 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:48:59,359 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:48:59,361 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:48:59,364 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:48:59,366 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:48:59,367 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:48:59,371 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:48:59,375 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:48:59,378 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:48:59,380 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:48:59,382 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:48:59,384 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:48:59,389 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:48:59,390 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:48:59,391 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:48:59,392 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:48:59,393 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:48:59,395 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:48:59,396 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:48:59,397 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:48:59,399 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:48:59,400 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:48:59,402 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:48:59,403 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:48:59,404 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:48:59,405 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:48:59,405 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:48:59,407 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:48:59,408 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:48:59,409 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f81992-e001-47f1-ae90-e889ef92da35/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 06:48:59,444 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:48:59,444 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:48:59,445 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:48:59,446 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:48:59,447 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:48:59,447 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:48:59,448 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:48:59,449 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:48:59,449 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:48:59,450 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:48:59,450 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 06:48:59,451 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 06:48:59,451 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 06:48:59,451 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:48:59,452 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 06:48:59,452 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:48:59,452 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 06:48:59,453 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 06:48:59,453 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 06:48:59,453 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:48:59,454 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 06:48:59,454 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:48:59,455 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:48:59,455 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:48:59,455 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:48:59,456 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:48:59,456 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:48:59,456 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 06:48:59,457 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 06:48:59,457 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 06:48:59,458 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 06:48:59,458 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 06:48:59,458 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 06:48:59,459 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:48:59,459 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_06f81992-e001-47f1-ae90-e889ef92da35/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f81992-e001-47f1-ae90-e889ef92da35/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e1c46549da470f14361a9b2a5fb79d079bbffb4006138f4fef05b9b152f9be7 [2021-11-20 06:48:59,771 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:48:59,797 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:48:59,800 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:48:59,802 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:48:59,809 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:48:59,811 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f81992-e001-47f1-ae90-e889ef92da35/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/array-lopstr16/flag_loopdep_simple.i [2021-11-20 06:48:59,926 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f81992-e001-47f1-ae90-e889ef92da35/bin/uautomizer-DQz5hQGWxF/data/3c6b4ecb3/cfd1a41cc7784e2586a8675375cd69c9/FLAG627ee623f [2021-11-20 06:49:00,514 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:49:00,514 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f81992-e001-47f1-ae90-e889ef92da35/sv-benchmarks/c/array-lopstr16/flag_loopdep_simple.i [2021-11-20 06:49:00,522 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f81992-e001-47f1-ae90-e889ef92da35/bin/uautomizer-DQz5hQGWxF/data/3c6b4ecb3/cfd1a41cc7784e2586a8675375cd69c9/FLAG627ee623f [2021-11-20 06:49:00,853 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f81992-e001-47f1-ae90-e889ef92da35/bin/uautomizer-DQz5hQGWxF/data/3c6b4ecb3/cfd1a41cc7784e2586a8675375cd69c9 [2021-11-20 06:49:00,857 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:49:00,860 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:49:00,865 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:49:00,866 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:49:00,870 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:49:00,871 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:49:00" (1/1) ... [2021-11-20 06:49:00,874 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9f56565 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:49:00, skipping insertion in model container [2021-11-20 06:49:00,874 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:49:00" (1/1) ... [2021-11-20 06:49:00,883 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:49:00,905 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:49:01,148 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_06f81992-e001-47f1-ae90-e889ef92da35/sv-benchmarks/c/array-lopstr16/flag_loopdep_simple.i[812,825] [2021-11-20 06:49:01,181 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:49:01,197 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:49:01,218 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_06f81992-e001-47f1-ae90-e889ef92da35/sv-benchmarks/c/array-lopstr16/flag_loopdep_simple.i[812,825] [2021-11-20 06:49:01,239 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:49:01,257 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:49:01,258 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:49:01 WrapperNode [2021-11-20 06:49:01,259 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:49:01,260 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:49:01,261 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:49:01,261 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:49:01,270 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:49:01" (1/1) ... [2021-11-20 06:49:01,282 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:49:01" (1/1) ... [2021-11-20 06:49:01,315 INFO L137 Inliner]: procedures = 17, calls = 14, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 64 [2021-11-20 06:49:01,316 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:49:01,317 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:49:01,318 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:49:01,318 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:49:01,328 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:49:01" (1/1) ... [2021-11-20 06:49:01,328 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:49:01" (1/1) ... [2021-11-20 06:49:01,346 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:49:01" (1/1) ... [2021-11-20 06:49:01,347 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:49:01" (1/1) ... [2021-11-20 06:49:01,352 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:49:01" (1/1) ... [2021-11-20 06:49:01,362 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:49:01" (1/1) ... [2021-11-20 06:49:01,371 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:49:01" (1/1) ... [2021-11-20 06:49:01,374 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:49:01,375 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:49:01,375 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:49:01,375 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:49:01,387 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:49:01" (1/1) ... [2021-11-20 06:49:01,396 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:49:01,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f81992-e001-47f1-ae90-e889ef92da35/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:49:01,423 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f81992-e001-47f1-ae90-e889ef92da35/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:49:01,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f81992-e001-47f1-ae90-e889ef92da35/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:49:01,469 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 06:49:01,470 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 06:49:01,470 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 06:49:01,470 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 06:49:01,470 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:49:01,471 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:49:01,471 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 06:49:01,471 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 06:49:01,562 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:49:01,563 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:49:01,696 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:49:01,703 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:49:01,703 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-20 06:49:01,706 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:49:01 BoogieIcfgContainer [2021-11-20 06:49:01,706 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:49:01,708 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:49:01,709 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:49:01,714 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:49:01,714 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:49:00" (1/3) ... [2021-11-20 06:49:01,715 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c51073f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:49:01, skipping insertion in model container [2021-11-20 06:49:01,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:49:01" (2/3) ... [2021-11-20 06:49:01,716 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c51073f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:49:01, skipping insertion in model container [2021-11-20 06:49:01,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:49:01" (3/3) ... [2021-11-20 06:49:01,718 INFO L111 eAbstractionObserver]: Analyzing ICFG flag_loopdep_simple.i [2021-11-20 06:49:01,724 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:49:01,725 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 06:49:01,785 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:49:01,794 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 06:49:01,795 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 06:49:01,813 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:49:01,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-20 06:49:01,820 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:49:01,820 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:49:01,821 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:49:01,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:49:01,828 INFO L85 PathProgramCache]: Analyzing trace with hash -2060710478, now seen corresponding path program 1 times [2021-11-20 06:49:01,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:49:01,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755406213] [2021-11-20 06:49:01,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:49:01,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:49:01,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:49:02,063 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 06:49:02,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:49:02,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755406213] [2021-11-20 06:49:02,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755406213] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:49:02,066 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:49:02,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:49:02,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283854857] [2021-11-20 06:49:02,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:49:02,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 06:49:02,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:49:02,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 06:49:02,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 06:49:02,127 INFO L87 Difference]: Start difference. First operand has 20 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:49:02,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:49:02,144 INFO L93 Difference]: Finished difference Result 36 states and 50 transitions. [2021-11-20 06:49:02,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 06:49:02,147 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-20 06:49:02,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:49:02,156 INFO L225 Difference]: With dead ends: 36 [2021-11-20 06:49:02,157 INFO L226 Difference]: Without dead ends: 16 [2021-11-20 06:49:02,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 06:49:02,165 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:49:02,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:49:02,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-20 06:49:02,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-11-20 06:49:02,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:49:02,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2021-11-20 06:49:02,207 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 10 [2021-11-20 06:49:02,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:49:02,207 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2021-11-20 06:49:02,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:49:02,208 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2021-11-20 06:49:02,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-20 06:49:02,208 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:49:02,209 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:49:02,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 06:49:02,209 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:49:02,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:49:02,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1919336157, now seen corresponding path program 1 times [2021-11-20 06:49:02,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:49:02,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121523249] [2021-11-20 06:49:02,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:49:02,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:49:02,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:49:02,289 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 06:49:02,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:49:02,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121523249] [2021-11-20 06:49:02,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121523249] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:49:02,291 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:49:02,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:49:02,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607618546] [2021-11-20 06:49:02,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:49:02,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:49:02,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:49:02,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:49:02,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:49:02,295 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:49:02,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:49:02,341 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2021-11-20 06:49:02,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:49:02,342 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-20 06:49:02,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:49:02,343 INFO L225 Difference]: With dead ends: 34 [2021-11-20 06:49:02,343 INFO L226 Difference]: Without dead ends: 26 [2021-11-20 06:49:02,344 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 06:49:02,346 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 10 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:49:02,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 26 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:49:02,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-20 06:49:02,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 17. [2021-11-20 06:49:02,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:49:02,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2021-11-20 06:49:02,355 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 10 [2021-11-20 06:49:02,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:49:02,355 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2021-11-20 06:49:02,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:49:02,356 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2021-11-20 06:49:02,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-20 06:49:02,357 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:49:02,357 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:49:02,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 06:49:02,358 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:49:02,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:49:02,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1200955363, now seen corresponding path program 1 times [2021-11-20 06:49:02,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:49:02,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653387577] [2021-11-20 06:49:02,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:49:02,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:49:02,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:49:02,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:49:02,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:49:02,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653387577] [2021-11-20 06:49:02,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653387577] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:49:02,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144155983] [2021-11-20 06:49:02,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:49:02,462 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:49:02,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f81992-e001-47f1-ae90-e889ef92da35/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:49:02,464 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f81992-e001-47f1-ae90-e889ef92da35/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:49:02,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f81992-e001-47f1-ae90-e889ef92da35/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 06:49:02,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:49:02,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 06:49:02,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:49:02,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:49:02,750 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:49:02,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144155983] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:49:02,750 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:49:02,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-20 06:49:02,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928299750] [2021-11-20 06:49:02,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:49:02,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:49:02,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:49:02,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:49:02,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:49:02,753 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:49:02,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:49:02,779 INFO L93 Difference]: Finished difference Result 31 states and 39 transitions. [2021-11-20 06:49:02,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:49:02,780 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-20 06:49:02,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:49:02,781 INFO L225 Difference]: With dead ends: 31 [2021-11-20 06:49:02,782 INFO L226 Difference]: Without dead ends: 17 [2021-11-20 06:49:02,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:49:02,790 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 4 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:49:02,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 38 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:49:02,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-20 06:49:02,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-20 06:49:02,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:49:02,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2021-11-20 06:49:02,802 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 13 [2021-11-20 06:49:02,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:49:02,803 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2021-11-20 06:49:02,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:49:02,804 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2021-11-20 06:49:02,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-20 06:49:02,804 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:49:02,805 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:49:02,852 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f81992-e001-47f1-ae90-e889ef92da35/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 06:49:03,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f81992-e001-47f1-ae90-e889ef92da35/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:49:03,027 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:49:03,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:49:03,028 INFO L85 PathProgramCache]: Analyzing trace with hash 391608737, now seen corresponding path program 1 times [2021-11-20 06:49:03,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:49:03,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498603061] [2021-11-20 06:49:03,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:49:03,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:49:03,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:49:03,124 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:49:03,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:49:03,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498603061] [2021-11-20 06:49:03,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498603061] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:49:03,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971791139] [2021-11-20 06:49:03,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:49:03,129 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:49:03,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f81992-e001-47f1-ae90-e889ef92da35/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:49:03,139 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f81992-e001-47f1-ae90-e889ef92da35/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:49:03,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f81992-e001-47f1-ae90-e889ef92da35/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 06:49:03,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:49:03,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:49:03,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:49:03,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:49:03,307 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:49:03,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971791139] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:49:03,307 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:49:03,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-20 06:49:03,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488524890] [2021-11-20 06:49:03,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:49:03,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:49:03,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:49:03,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:49:03,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:49:03,310 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:49:03,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:49:03,321 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2021-11-20 06:49:03,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:49:03,322 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-20 06:49:03,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:49:03,323 INFO L225 Difference]: With dead ends: 32 [2021-11-20 06:49:03,323 INFO L226 Difference]: Without dead ends: 19 [2021-11-20 06:49:03,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:49:03,325 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 1 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:49:03,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 32 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:49:03,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-20 06:49:03,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2021-11-20 06:49:03,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:49:03,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-11-20 06:49:03,332 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 13 [2021-11-20 06:49:03,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:49:03,332 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-11-20 06:49:03,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:49:03,332 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-11-20 06:49:03,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-20 06:49:03,333 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:49:03,333 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:49:03,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f81992-e001-47f1-ae90-e889ef92da35/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 06:49:03,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f81992-e001-47f1-ae90-e889ef92da35/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:49:03,559 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:49:03,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:49:03,560 INFO L85 PathProgramCache]: Analyzing trace with hash 2027280351, now seen corresponding path program 1 times [2021-11-20 06:49:03,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:49:03,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702852613] [2021-11-20 06:49:03,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:49:03,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:49:03,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:49:03,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:49:03,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:49:03,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702852613] [2021-11-20 06:49:03,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702852613] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:49:03,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632443006] [2021-11-20 06:49:03,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:49:03,649 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:49:03,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f81992-e001-47f1-ae90-e889ef92da35/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:49:03,650 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f81992-e001-47f1-ae90-e889ef92da35/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:49:03,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f81992-e001-47f1-ae90-e889ef92da35/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 06:49:03,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:49:03,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 06:49:03,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:49:03,840 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:49:03,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:49:03,948 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:49:03,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632443006] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:49:03,949 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:49:03,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-11-20 06:49:03,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470496228] [2021-11-20 06:49:03,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:49:03,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:49:03,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:49:03,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:49:03,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:49:03,954 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:49:04,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:49:04,055 INFO L93 Difference]: Finished difference Result 56 states and 67 transitions. [2021-11-20 06:49:04,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 06:49:04,056 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-20 06:49:04,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:49:04,058 INFO L225 Difference]: With dead ends: 56 [2021-11-20 06:49:04,058 INFO L226 Difference]: Without dead ends: 43 [2021-11-20 06:49:04,059 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:49:04,060 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 24 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:49:04,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 48 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:49:04,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-20 06:49:04,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 27. [2021-11-20 06:49:04,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:49:04,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2021-11-20 06:49:04,068 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 15 [2021-11-20 06:49:04,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:49:04,069 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2021-11-20 06:49:04,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:49:04,069 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2021-11-20 06:49:04,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-20 06:49:04,071 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:49:04,071 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:49:04,113 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f81992-e001-47f1-ae90-e889ef92da35/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 06:49:04,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f81992-e001-47f1-ae90-e889ef92da35/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:49:04,287 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:49:04,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:49:04,288 INFO L85 PathProgramCache]: Analyzing trace with hash 2044266853, now seen corresponding path program 2 times [2021-11-20 06:49:04,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:49:04,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187031699] [2021-11-20 06:49:04,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:49:04,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:49:04,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:49:04,382 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-20 06:49:04,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:49:04,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187031699] [2021-11-20 06:49:04,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187031699] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:49:04,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146082530] [2021-11-20 06:49:04,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:49:04,384 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:49:04,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f81992-e001-47f1-ae90-e889ef92da35/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:49:04,385 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f81992-e001-47f1-ae90-e889ef92da35/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:49:04,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f81992-e001-47f1-ae90-e889ef92da35/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 06:49:04,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:49:04,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:49:04,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 06:49:04,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:49:04,757 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 06:49:04,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:49:04,915 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 06:49:04,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146082530] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:49:04,916 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:49:04,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2021-11-20 06:49:04,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692269533] [2021-11-20 06:49:04,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:49:04,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-20 06:49:04,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:49:04,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-20 06:49:04,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-11-20 06:49:04,919 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:49:05,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:49:05,048 INFO L93 Difference]: Finished difference Result 81 states and 96 transitions. [2021-11-20 06:49:05,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 06:49:05,049 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-20 06:49:05,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:49:05,053 INFO L225 Difference]: With dead ends: 81 [2021-11-20 06:49:05,053 INFO L226 Difference]: Without dead ends: 65 [2021-11-20 06:49:05,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-11-20 06:49:05,058 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 44 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:49:05,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 54 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:49:05,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-11-20 06:49:05,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 42. [2021-11-20 06:49:05,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 41 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:49:05,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2021-11-20 06:49:05,080 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 24 [2021-11-20 06:49:05,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:49:05,080 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2021-11-20 06:49:05,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:49:05,081 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2021-11-20 06:49:05,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-20 06:49:05,082 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:49:05,083 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:49:05,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f81992-e001-47f1-ae90-e889ef92da35/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 06:49:05,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f81992-e001-47f1-ae90-e889ef92da35/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-20 06:49:05,309 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:49:05,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:49:05,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1130748941, now seen corresponding path program 3 times [2021-11-20 06:49:05,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:49:05,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491987534] [2021-11-20 06:49:05,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:49:05,310 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:49:05,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:49:05,458 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-20 06:49:05,459 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:49:05,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491987534] [2021-11-20 06:49:05,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491987534] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:49:05,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492116640] [2021-11-20 06:49:05,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:49:05,460 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:49:05,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f81992-e001-47f1-ae90-e889ef92da35/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:49:05,461 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f81992-e001-47f1-ae90-e889ef92da35/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:49:05,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f81992-e001-47f1-ae90-e889ef92da35/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 06:49:05,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-20 06:49:05,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:49:05,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-20 06:49:05,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:49:05,831 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-11-20 06:49:05,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:49:06,000 INFO L354 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2021-11-20 06:49:06,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 13 [2021-11-20 06:49:06,050 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-11-20 06:49:06,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492116640] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:49:06,050 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:49:06,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 7] total 15 [2021-11-20 06:49:06,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536982562] [2021-11-20 06:49:06,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:49:06,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-20 06:49:06,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:49:06,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-20 06:49:06,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-11-20 06:49:06,059 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:49:06,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:49:06,332 INFO L93 Difference]: Finished difference Result 94 states and 108 transitions. [2021-11-20 06:49:06,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 06:49:06,333 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-20 06:49:06,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:49:06,339 INFO L225 Difference]: With dead ends: 94 [2021-11-20 06:49:06,340 INFO L226 Difference]: Without dead ends: 86 [2021-11-20 06:49:06,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=391, Unknown=0, NotChecked=0, Total=552 [2021-11-20 06:49:06,345 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 101 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:49:06,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 106 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:49:06,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-11-20 06:49:06,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 48. [2021-11-20 06:49:06,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.1063829787234043) internal successors, (52), 47 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:49:06,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2021-11-20 06:49:06,362 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 39 [2021-11-20 06:49:06,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:49:06,362 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2021-11-20 06:49:06,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:49:06,363 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2021-11-20 06:49:06,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-20 06:49:06,364 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:49:06,365 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:49:06,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f81992-e001-47f1-ae90-e889ef92da35/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 06:49:06,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f81992-e001-47f1-ae90-e889ef92da35/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:49:06,582 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:49:06,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:49:06,582 INFO L85 PathProgramCache]: Analyzing trace with hash 927320518, now seen corresponding path program 1 times [2021-11-20 06:49:06,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:49:06,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115135754] [2021-11-20 06:49:06,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:49:06,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:49:06,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:49:06,713 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2021-11-20 06:49:06,713 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:49:06,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115135754] [2021-11-20 06:49:06,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115135754] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:49:06,714 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:49:06,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:49:06,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103985147] [2021-11-20 06:49:06,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:49:06,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:49:06,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:49:06,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:49:06,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:49:06,717 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:49:06,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:49:06,725 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2021-11-20 06:49:06,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:49:06,727 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-20 06:49:06,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:49:06,728 INFO L225 Difference]: With dead ends: 55 [2021-11-20 06:49:06,729 INFO L226 Difference]: Without dead ends: 48 [2021-11-20 06:49:06,729 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 06:49:06,730 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 6 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:49:06,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 18 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:49:06,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-11-20 06:49:06,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-11-20 06:49:06,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 47 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:49:06,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2021-11-20 06:49:06,745 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 45 [2021-11-20 06:49:06,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:49:06,748 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2021-11-20 06:49:06,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:49:06,748 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2021-11-20 06:49:06,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-20 06:49:06,753 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:49:06,753 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:49:06,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-20 06:49:06,754 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:49:06,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:49:06,756 INFO L85 PathProgramCache]: Analyzing trace with hash 2012771472, now seen corresponding path program 1 times [2021-11-20 06:49:06,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:49:06,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936414940] [2021-11-20 06:49:06,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:49:06,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:49:06,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:49:06,879 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-11-20 06:49:06,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:49:06,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936414940] [2021-11-20 06:49:06,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936414940] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:49:06,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657936872] [2021-11-20 06:49:06,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:49:06,881 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:49:06,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f81992-e001-47f1-ae90-e889ef92da35/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:49:06,882 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f81992-e001-47f1-ae90-e889ef92da35/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:49:06,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f81992-e001-47f1-ae90-e889ef92da35/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 06:49:06,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:49:06,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-20 06:49:06,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:49:07,403 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-20 06:49:07,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:49:07,848 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-20 06:49:07,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657936872] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:49:07,849 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:49:07,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 13, 13] total 29 [2021-11-20 06:49:07,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116852831] [2021-11-20 06:49:07,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:49:07,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-20 06:49:07,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:49:07,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-20 06:49:07,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=296, Invalid=516, Unknown=0, NotChecked=0, Total=812 [2021-11-20 06:49:07,852 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand has 29 states, 29 states have (on average 2.6206896551724137) internal successors, (76), 29 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:49:08,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:49:08,028 INFO L93 Difference]: Finished difference Result 132 states and 148 transitions. [2021-11-20 06:49:08,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-20 06:49:08,029 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.6206896551724137) internal successors, (76), 29 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-20 06:49:08,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:49:08,031 INFO L225 Difference]: With dead ends: 132 [2021-11-20 06:49:08,031 INFO L226 Difference]: Without dead ends: 107 [2021-11-20 06:49:08,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=296, Invalid=516, Unknown=0, NotChecked=0, Total=812 [2021-11-20 06:49:08,033 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 91 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:49:08,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 76 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:49:08,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-11-20 06:49:08,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 75. [2021-11-20 06:49:08,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 74 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:49:08,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2021-11-20 06:49:08,045 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 47 [2021-11-20 06:49:08,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:49:08,046 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2021-11-20 06:49:08,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.6206896551724137) internal successors, (76), 29 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:49:08,047 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2021-11-20 06:49:08,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-20 06:49:08,048 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:49:08,048 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:49:08,094 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f81992-e001-47f1-ae90-e889ef92da35/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 06:49:08,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f81992-e001-47f1-ae90-e889ef92da35/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:49:08,275 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:49:08,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:49:08,275 INFO L85 PathProgramCache]: Analyzing trace with hash 426637324, now seen corresponding path program 2 times [2021-11-20 06:49:08,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:49:08,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698612547] [2021-11-20 06:49:08,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:49:08,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:49:08,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:49:08,459 INFO L134 CoverageAnalysis]: Checked inductivity of 522 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 487 trivial. 0 not checked. [2021-11-20 06:49:08,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:49:08,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698612547] [2021-11-20 06:49:08,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698612547] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:49:08,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66107556] [2021-11-20 06:49:08,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:49:08,461 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:49:08,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f81992-e001-47f1-ae90-e889ef92da35/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:49:08,466 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f81992-e001-47f1-ae90-e889ef92da35/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:49:08,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f81992-e001-47f1-ae90-e889ef92da35/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 06:49:08,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:49:08,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:49:08,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-20 06:49:08,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:49:09,524 INFO L134 CoverageAnalysis]: Checked inductivity of 522 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-20 06:49:09,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:49:10,812 INFO L134 CoverageAnalysis]: Checked inductivity of 522 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-20 06:49:10,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66107556] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:49:10,813 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:49:10,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 25, 25] total 54 [2021-11-20 06:49:10,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243966757] [2021-11-20 06:49:10,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:49:10,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-11-20 06:49:10,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:49:10,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-11-20 06:49:10,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1155, Invalid=1707, Unknown=0, NotChecked=0, Total=2862 [2021-11-20 06:49:10,818 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand has 54 states, 54 states have (on average 2.3518518518518516) internal successors, (127), 54 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:49:11,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:49:11,172 INFO L93 Difference]: Finished difference Result 193 states and 221 transitions. [2021-11-20 06:49:11,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-11-20 06:49:11,173 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.3518518518518516) internal successors, (127), 54 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-20 06:49:11,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:49:11,175 INFO L225 Difference]: With dead ends: 193 [2021-11-20 06:49:11,175 INFO L226 Difference]: Without dead ends: 165 [2021-11-20 06:49:11,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1155, Invalid=1707, Unknown=0, NotChecked=0, Total=2862 [2021-11-20 06:49:11,179 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 102 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:49:11,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 112 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:49:11,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-11-20 06:49:11,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 126. [2021-11-20 06:49:11,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.024) internal successors, (128), 125 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:49:11,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 128 transitions. [2021-11-20 06:49:11,228 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 128 transitions. Word has length 74 [2021-11-20 06:49:11,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:49:11,231 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 128 transitions. [2021-11-20 06:49:11,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.3518518518518516) internal successors, (127), 54 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:49:11,232 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 128 transitions. [2021-11-20 06:49:11,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-20 06:49:11,241 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:49:11,241 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:49:11,271 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f81992-e001-47f1-ae90-e889ef92da35/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-20 06:49:11,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f81992-e001-47f1-ae90-e889ef92da35/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-20 06:49:11,443 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:49:11,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:49:11,443 INFO L85 PathProgramCache]: Analyzing trace with hash -374145592, now seen corresponding path program 3 times [2021-11-20 06:49:11,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:49:11,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124647813] [2021-11-20 06:49:11,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:49:11,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:49:11,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:49:11,602 INFO L134 CoverageAnalysis]: Checked inductivity of 2170 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 2119 trivial. 0 not checked. [2021-11-20 06:49:11,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:49:11,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124647813] [2021-11-20 06:49:11,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124647813] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:49:11,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195209340] [2021-11-20 06:49:11,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:49:11,604 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:49:11,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f81992-e001-47f1-ae90-e889ef92da35/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:49:11,605 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f81992-e001-47f1-ae90-e889ef92da35/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:49:11,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f81992-e001-47f1-ae90-e889ef92da35/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 06:49:11,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-20 06:49:11,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:49:11,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-20 06:49:11,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:49:12,150 INFO L134 CoverageAnalysis]: Checked inductivity of 2170 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 2051 trivial. 0 not checked. [2021-11-20 06:49:12,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:49:12,333 INFO L354 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2021-11-20 06:49:12,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 13 [2021-11-20 06:49:12,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2170 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 2142 trivial. 0 not checked. [2021-11-20 06:49:12,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195209340] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:49:12,554 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:49:12,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 19 [2021-11-20 06:49:12,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883702137] [2021-11-20 06:49:12,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:49:12,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-20 06:49:12,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:49:12,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-20 06:49:12,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2021-11-20 06:49:12,557 INFO L87 Difference]: Start difference. First operand 126 states and 128 transitions. Second operand has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 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 06:49:12,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:49:12,821 INFO L93 Difference]: Finished difference Result 184 states and 188 transitions. [2021-11-20 06:49:12,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 06:49:12,822 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 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 125 [2021-11-20 06:49:12,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:49:12,824 INFO L225 Difference]: With dead ends: 184 [2021-11-20 06:49:12,824 INFO L226 Difference]: Without dead ends: 173 [2021-11-20 06:49:12,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 238 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=185, Invalid=517, Unknown=0, NotChecked=0, Total=702 [2021-11-20 06:49:12,826 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 190 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:49:12,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 96 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:49:12,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-11-20 06:49:12,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 134. [2021-11-20 06:49:12,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.0225563909774436) internal successors, (136), 133 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:49:12,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 136 transitions. [2021-11-20 06:49:12,841 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 136 transitions. Word has length 125 [2021-11-20 06:49:12,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:49:12,841 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 136 transitions. [2021-11-20 06:49:12,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 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 06:49:12,842 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 136 transitions. [2021-11-20 06:49:12,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-20 06:49:12,844 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:49:12,844 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 7, 7, 7, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:49:12,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f81992-e001-47f1-ae90-e889ef92da35/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-20 06:49:13,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f81992-e001-47f1-ae90-e889ef92da35/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-20 06:49:13,071 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:49:13,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:49:13,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1426478299, now seen corresponding path program 4 times [2021-11-20 06:49:13,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:49:13,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627179846] [2021-11-20 06:49:13,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:49:13,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:49:13,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:49:13,226 INFO L134 CoverageAnalysis]: Checked inductivity of 2197 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 2127 trivial. 0 not checked. [2021-11-20 06:49:13,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:49:13,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627179846] [2021-11-20 06:49:13,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627179846] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:49:13,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631015604] [2021-11-20 06:49:13,227 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 06:49:13,227 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:49:13,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f81992-e001-47f1-ae90-e889ef92da35/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:49:13,229 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f81992-e001-47f1-ae90-e889ef92da35/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:49:13,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f81992-e001-47f1-ae90-e889ef92da35/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 06:49:13,351 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 06:49:13,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:49:13,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 06:49:13,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:49:13,658 INFO L134 CoverageAnalysis]: Checked inductivity of 2197 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 2127 trivial. 0 not checked. [2021-11-20 06:49:13,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:49:14,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2197 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 2127 trivial. 0 not checked. [2021-11-20 06:49:14,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631015604] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:49:14,081 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:49:14,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2021-11-20 06:49:14,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483870611] [2021-11-20 06:49:14,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:49:14,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-20 06:49:14,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:49:14,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-20 06:49:14,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-11-20 06:49:14,091 INFO L87 Difference]: Start difference. First operand 134 states and 136 transitions. Second operand has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:49:14,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:49:14,279 INFO L93 Difference]: Finished difference Result 271 states and 282 transitions. [2021-11-20 06:49:14,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-20 06:49:14,280 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 133 [2021-11-20 06:49:14,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:49:14,283 INFO L225 Difference]: With dead ends: 271 [2021-11-20 06:49:14,283 INFO L226 Difference]: Without dead ends: 255 [2021-11-20 06:49:14,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-11-20 06:49:14,285 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 318 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:49:14,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [318 Valid, 98 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:49:14,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-11-20 06:49:14,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 161. [2021-11-20 06:49:14,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.01875) internal successors, (163), 160 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:49:14,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 163 transitions. [2021-11-20 06:49:14,302 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 163 transitions. Word has length 133 [2021-11-20 06:49:14,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:49:14,303 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 163 transitions. [2021-11-20 06:49:14,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:49:14,303 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 163 transitions. [2021-11-20 06:49:14,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-20 06:49:14,305 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:49:14,305 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 16, 16, 16, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:49:14,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f81992-e001-47f1-ae90-e889ef92da35/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-20 06:49:14,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f81992-e001-47f1-ae90-e889ef92da35/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-20 06:49:14,511 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:49:14,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:49:14,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1100159513, now seen corresponding path program 5 times [2021-11-20 06:49:14,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:49:14,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988825861] [2021-11-20 06:49:14,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:49:14,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:49:14,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:49:14,818 INFO L134 CoverageAnalysis]: Checked inductivity of 2503 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 2127 trivial. 0 not checked. [2021-11-20 06:49:14,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:49:14,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988825861] [2021-11-20 06:49:14,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988825861] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:49:14,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302925276] [2021-11-20 06:49:14,819 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 06:49:14,819 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:49:14,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f81992-e001-47f1-ae90-e889ef92da35/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:49:14,820 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f81992-e001-47f1-ae90-e889ef92da35/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:49:14,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f81992-e001-47f1-ae90-e889ef92da35/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 06:50:39,260 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2021-11-20 06:50:39,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:50:39,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-20 06:50:39,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:50:39,695 INFO L134 CoverageAnalysis]: Checked inductivity of 2503 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 2127 trivial. 0 not checked. [2021-11-20 06:50:39,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:50:40,398 INFO L134 CoverageAnalysis]: Checked inductivity of 2503 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 2127 trivial. 0 not checked. [2021-11-20 06:50:40,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302925276] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:50:40,398 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:50:40,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 37 [2021-11-20 06:50:40,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281686178] [2021-11-20 06:50:40,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:50:40,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-20 06:50:40,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:50:40,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-20 06:50:40,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-11-20 06:50:40,402 INFO L87 Difference]: Start difference. First operand 161 states and 163 transitions. Second operand has 37 states, 37 states have (on average 3.1621621621621623) internal successors, (117), 37 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:50:40,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:50:40,860 INFO L93 Difference]: Finished difference Result 451 states and 471 transitions. [2021-11-20 06:50:40,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-20 06:50:40,860 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.1621621621621623) internal successors, (117), 37 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-11-20 06:50:40,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:50:40,866 INFO L225 Difference]: With dead ends: 451 [2021-11-20 06:50:40,866 INFO L226 Difference]: Without dead ends: 435 [2021-11-20 06:50:40,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-11-20 06:50:40,869 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 916 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 916 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:50:40,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [916 Valid, 184 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 06:50:40,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-11-20 06:50:40,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 215. [2021-11-20 06:50:40,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 1.014018691588785) internal successors, (217), 214 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 06:50:40,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 217 transitions. [2021-11-20 06:50:40,887 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 217 transitions. Word has length 160 [2021-11-20 06:50:40,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:50:40,888 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 217 transitions. [2021-11-20 06:50:40,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.1621621621621623) internal successors, (117), 37 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:50:40,888 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 217 transitions. [2021-11-20 06:50:40,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2021-11-20 06:50:40,892 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:50:40,892 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 34, 34, 34, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:50:40,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f81992-e001-47f1-ae90-e889ef92da35/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-20 06:50:41,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f81992-e001-47f1-ae90-e889ef92da35/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-20 06:50:41,107 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:50:41,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:50:41,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1453073049, now seen corresponding path program 6 times [2021-11-20 06:50:41,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:50:41,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124479737] [2021-11-20 06:50:41,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:50:41,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:50:41,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:41,988 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 1717 refuted. 0 times theorem prover too weak. 2127 trivial. 0 not checked. [2021-11-20 06:50:41,988 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:50:41,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124479737] [2021-11-20 06:50:41,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124479737] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:50:41,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235031310] [2021-11-20 06:50:41,989 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 06:50:41,989 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:50:41,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f81992-e001-47f1-ae90-e889ef92da35/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:50:41,994 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f81992-e001-47f1-ae90-e889ef92da35/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:50:42,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f81992-e001-47f1-ae90-e889ef92da35/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-20 06:50:42,464 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-11-20 06:50:42,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:50:42,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-20 06:50:42,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:50:43,228 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 451 refuted. 0 times theorem prover too weak. 3393 trivial. 0 not checked. [2021-11-20 06:50:43,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:50:43,700 INFO L354 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2021-11-20 06:50:43,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 13 [2021-11-20 06:50:43,901 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 31 proven. 240 refuted. 0 times theorem prover too weak. 3573 trivial. 0 not checked. [2021-11-20 06:50:43,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235031310] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:50:43,901 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:50:43,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 13, 11] total 51 [2021-11-20 06:50:43,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402861198] [2021-11-20 06:50:43,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:50:43,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-20 06:50:43,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:50:43,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-20 06:50:43,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=876, Invalid=1674, Unknown=0, NotChecked=0, Total=2550 [2021-11-20 06:50:43,907 INFO L87 Difference]: Start difference. First operand 215 states and 217 transitions. Second operand has 51 states, 51 states have (on average 3.156862745098039) internal successors, (161), 51 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:50:45,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:50:45,667 INFO L93 Difference]: Finished difference Result 467 states and 471 transitions. [2021-11-20 06:50:45,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-20 06:50:45,670 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 3.156862745098039) internal successors, (161), 51 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 214 [2021-11-20 06:50:45,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:50:45,675 INFO L225 Difference]: With dead ends: 467 [2021-11-20 06:50:45,675 INFO L226 Difference]: Without dead ends: 451 [2021-11-20 06:50:45,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 412 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1523 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2305, Invalid=5005, Unknown=0, NotChecked=0, Total=7310 [2021-11-20 06:50:45,680 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 1553 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 296 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1553 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 296 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:50:45,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1553 Valid, 298 Invalid, 754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [296 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 06:50:45,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-11-20 06:50:45,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 223. [2021-11-20 06:50:45,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 1.0135135135135136) internal successors, (225), 222 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:50:45,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 225 transitions. [2021-11-20 06:50:45,699 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 225 transitions. Word has length 214 [2021-11-20 06:50:45,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:50:45,700 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 225 transitions. [2021-11-20 06:50:45,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 3.156862745098039) internal successors, (161), 51 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:50:45,700 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 225 transitions. [2021-11-20 06:50:45,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2021-11-20 06:50:45,704 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:50:45,704 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 35, 35, 35, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:50:45,747 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f81992-e001-47f1-ae90-e889ef92da35/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-20 06:50:45,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f81992-e001-47f1-ae90-e889ef92da35/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-20 06:50:45,919 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:50:45,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:50:45,919 INFO L85 PathProgramCache]: Analyzing trace with hash 555566940, now seen corresponding path program 7 times [2021-11-20 06:50:45,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:50:45,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225019240] [2021-11-20 06:50:45,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:50:45,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:50:46,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:46,859 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 0 proven. 1820 refuted. 0 times theorem prover too weak. 2140 trivial. 0 not checked. [2021-11-20 06:50:46,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:50:46,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225019240] [2021-11-20 06:50:46,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225019240] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:50:46,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858781846] [2021-11-20 06:50:46,860 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 06:50:46,860 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:50:46,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f81992-e001-47f1-ae90-e889ef92da35/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:50:46,863 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f81992-e001-47f1-ae90-e889ef92da35/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:50:46,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f81992-e001-47f1-ae90-e889ef92da35/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-20 06:50:47,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:47,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-20 06:50:47,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:50:49,802 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 1844 trivial. 0 not checked. [2021-11-20 06:50:49,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:50:54,168 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 1844 trivial. 0 not checked. [2021-11-20 06:50:54,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858781846] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:50:54,168 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:50:54,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 49, 49] total 132 [2021-11-20 06:50:54,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000883646] [2021-11-20 06:50:54,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:50:54,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2021-11-20 06:50:54,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:50:54,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2021-11-20 06:50:54,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5262, Invalid=12030, Unknown=0, NotChecked=0, Total=17292 [2021-11-20 06:50:54,180 INFO L87 Difference]: Start difference. First operand 223 states and 225 transitions. Second operand has 132 states, 132 states have (on average 2.371212121212121) internal successors, (313), 132 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:50:55,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:50:55,079 INFO L93 Difference]: Finished difference Result 685 states and 737 transitions. [2021-11-20 06:50:55,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2021-11-20 06:50:55,080 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 132 states have (on average 2.371212121212121) internal successors, (313), 132 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2021-11-20 06:50:55,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:50:55,083 INFO L225 Difference]: With dead ends: 685 [2021-11-20 06:50:55,083 INFO L226 Difference]: Without dead ends: 557 [2021-11-20 06:50:55,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 350 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3290 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=5262, Invalid=12030, Unknown=0, NotChecked=0, Total=17292 [2021-11-20 06:50:55,092 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 768 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 768 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:50:55,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [768 Valid, 251 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 06:50:55,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2021-11-20 06:50:55,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 322. [2021-11-20 06:50:55,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 1.0093457943925233) internal successors, (324), 321 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:50:55,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 324 transitions. [2021-11-20 06:50:55,114 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 324 transitions. Word has length 222 [2021-11-20 06:50:55,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:50:55,115 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 324 transitions. [2021-11-20 06:50:55,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 132 states, 132 states have (on average 2.371212121212121) internal successors, (313), 132 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:50:55,116 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 324 transitions. [2021-11-20 06:50:55,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2021-11-20 06:50:55,122 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:50:55,123 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 36, 36, 36, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:50:55,170 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f81992-e001-47f1-ae90-e889ef92da35/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-11-20 06:50:55,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f81992-e001-47f1-ae90-e889ef92da35/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:50:55,351 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:50:55,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:50:55,351 INFO L85 PathProgramCache]: Analyzing trace with hash 194024584, now seen corresponding path program 8 times [2021-11-20 06:50:55,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:50:55,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64000160] [2021-11-20 06:50:55,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:50:55,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:50:55,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:56,332 INFO L134 CoverageAnalysis]: Checked inductivity of 10786 backedges. 0 proven. 1926 refuted. 0 times theorem prover too weak. 8860 trivial. 0 not checked. [2021-11-20 06:50:56,332 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:50:56,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64000160] [2021-11-20 06:50:56,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64000160] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:50:56,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951422523] [2021-11-20 06:50:56,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:50:56,333 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:50:56,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f81992-e001-47f1-ae90-e889ef92da35/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:50:56,336 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f81992-e001-47f1-ae90-e889ef92da35/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:50:56,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f81992-e001-47f1-ae90-e889ef92da35/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-20 06:50:56,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:50:56,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:50:56,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 918 conjuncts, 98 conjunts are in the unsatisfiable core [2021-11-20 06:50:56,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:51:03,360 INFO L134 CoverageAnalysis]: Checked inductivity of 10786 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 1950 trivial. 0 not checked. [2021-11-20 06:51:03,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:51:17,210 INFO L134 CoverageAnalysis]: Checked inductivity of 10786 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 1950 trivial. 0 not checked. [2021-11-20 06:51:17,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951422523] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:51:17,210 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:51:17,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 97, 97] total 229 [2021-11-20 06:51:17,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500185306] [2021-11-20 06:51:17,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:51:17,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 229 states [2021-11-20 06:51:17,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:51:17,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 229 interpolants. [2021-11-20 06:51:17,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19076, Invalid=33136, Unknown=0, NotChecked=0, Total=52212 [2021-11-20 06:51:17,235 INFO L87 Difference]: Start difference. First operand 322 states and 324 transitions. Second operand has 229 states, 229 states have (on average 2.2183406113537116) internal successors, (508), 229 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:51:19,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:51:19,180 INFO L93 Difference]: Finished difference Result 890 states and 990 transitions. [2021-11-20 06:51:19,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 229 states. [2021-11-20 06:51:19,181 INFO L78 Accepts]: Start accepts. Automaton has has 229 states, 229 states have (on average 2.2183406113537116) internal successors, (508), 229 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 321 [2021-11-20 06:51:19,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:51:19,187 INFO L225 Difference]: With dead ends: 890 [2021-11-20 06:51:19,187 INFO L226 Difference]: Without dead ends: 759 [2021-11-20 06:51:19,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 679 GetRequests, 452 SyntacticMatches, 0 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6840 ImplicationChecksByTransitivity, 19.3s TimeCoverageRelationStatistics Valid=19076, Invalid=33136, Unknown=0, NotChecked=0, Total=52212 [2021-11-20 06:51:19,194 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 906 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 906 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 06:51:19,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [906 Valid, 242 Invalid, 832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 615 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-20 06:51:19,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2021-11-20 06:51:19,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 517. [2021-11-20 06:51:19,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 516 states have (on average 1.005813953488372) internal successors, (519), 516 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:51:19,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 519 transitions. [2021-11-20 06:51:19,223 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 519 transitions. Word has length 321 [2021-11-20 06:51:19,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:51:19,224 INFO L470 AbstractCegarLoop]: Abstraction has 517 states and 519 transitions. [2021-11-20 06:51:19,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 229 states, 229 states have (on average 2.2183406113537116) internal successors, (508), 229 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:51:19,225 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 519 transitions. [2021-11-20 06:51:19,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 517 [2021-11-20 06:51:19,240 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:51:19,241 INFO L514 BasicCegarLoop]: trace histogram [190, 190, 37, 37, 37, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:51:19,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f81992-e001-47f1-ae90-e889ef92da35/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-20 06:51:19,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f81992-e001-47f1-ae90-e889ef92da35/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:51:19,457 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:51:19,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:51:19,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1185820924, now seen corresponding path program 9 times [2021-11-20 06:51:19,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:51:19,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031118441] [2021-11-20 06:51:19,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:51:19,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:51:19,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:20,592 INFO L134 CoverageAnalysis]: Checked inductivity of 38159 backedges. 0 proven. 2035 refuted. 0 times theorem prover too weak. 36124 trivial. 0 not checked. [2021-11-20 06:51:20,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:51:20,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031118441] [2021-11-20 06:51:20,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031118441] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:51:20,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042952283] [2021-11-20 06:51:20,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:51:20,594 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:51:20,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f81992-e001-47f1-ae90-e889ef92da35/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:51:20,604 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f81992-e001-47f1-ae90-e889ef92da35/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:51:20,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f81992-e001-47f1-ae90-e889ef92da35/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-20 06:51:20,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-11-20 06:51:20,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:51:20,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-20 06:51:20,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:51:22,068 INFO L134 CoverageAnalysis]: Checked inductivity of 38159 backedges. 0 proven. 409 refuted. 0 times theorem prover too weak. 37750 trivial. 0 not checked. [2021-11-20 06:51:22,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:51:22,637 INFO L354 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2021-11-20 06:51:22,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 13 [2021-11-20 06:51:23,205 INFO L134 CoverageAnalysis]: Checked inductivity of 38159 backedges. 33 proven. 376 refuted. 0 times theorem prover too weak. 37750 trivial. 0 not checked. [2021-11-20 06:51:23,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042952283] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:51:23,206 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:51:23,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 13, 13] total 55 [2021-11-20 06:51:23,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048953414] [2021-11-20 06:51:23,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:51:23,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-11-20 06:51:23,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:51:23,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-11-20 06:51:23,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1889, Unknown=0, NotChecked=0, Total=2970 [2021-11-20 06:51:23,212 INFO L87 Difference]: Start difference. First operand 517 states and 519 transitions. Second operand has 55 states, 55 states have (on average 3.2363636363636363) internal successors, (178), 55 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:51:24,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:51:24,991 INFO L93 Difference]: Finished difference Result 788 states and 792 transitions. [2021-11-20 06:51:24,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-20 06:51:24,992 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 3.2363636363636363) internal successors, (178), 55 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 516 [2021-11-20 06:51:24,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:51:24,997 INFO L225 Difference]: With dead ends: 788 [2021-11-20 06:51:24,997 INFO L226 Difference]: Without dead ends: 767 [2021-11-20 06:51:24,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1107 GetRequests, 1015 SyntacticMatches, 2 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1880 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2700, Invalid=5672, Unknown=0, NotChecked=0, Total=8372 [2021-11-20 06:51:25,000 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1120 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1120 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:51:25,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1120 Valid, 333 Invalid, 682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 06:51:25,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2021-11-20 06:51:25,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 525. [2021-11-20 06:51:25,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 524 states have (on average 1.0057251908396947) internal successors, (527), 524 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:51:25,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 527 transitions. [2021-11-20 06:51:25,034 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 527 transitions. Word has length 516 [2021-11-20 06:51:25,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:51:25,035 INFO L470 AbstractCegarLoop]: Abstraction has 525 states and 527 transitions. [2021-11-20 06:51:25,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 3.2363636363636363) internal successors, (178), 55 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:51:25,036 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 527 transitions. [2021-11-20 06:51:25,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 525 [2021-11-20 06:51:25,040 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:51:25,041 INFO L514 BasicCegarLoop]: trace histogram [190, 190, 38, 38, 38, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:51:25,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f81992-e001-47f1-ae90-e889ef92da35/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-20 06:51:25,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f81992-e001-47f1-ae90-e889ef92da35/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-20 06:51:25,263 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:51:25,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:51:25,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1093515801, now seen corresponding path program 10 times [2021-11-20 06:51:25,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:51:25,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622390672] [2021-11-20 06:51:25,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:51:25,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:51:25,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:26,399 INFO L134 CoverageAnalysis]: Checked inductivity of 38289 backedges. 0 proven. 2147 refuted. 0 times theorem prover too weak. 36142 trivial. 0 not checked. [2021-11-20 06:51:26,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:51:26,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622390672] [2021-11-20 06:51:26,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622390672] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:51:26,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450321596] [2021-11-20 06:51:26,400 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 06:51:26,400 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:51:26,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f81992-e001-47f1-ae90-e889ef92da35/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:51:26,405 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f81992-e001-47f1-ae90-e889ef92da35/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:51:26,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f81992-e001-47f1-ae90-e889ef92da35/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-20 06:51:26,754 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 06:51:26,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:51:26,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 1521 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-20 06:51:26,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:51:27,682 INFO L134 CoverageAnalysis]: Checked inductivity of 38289 backedges. 0 proven. 2147 refuted. 0 times theorem prover too weak. 36142 trivial. 0 not checked. [2021-11-20 06:51:27,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:51:30,343 INFO L134 CoverageAnalysis]: Checked inductivity of 38289 backedges. 0 proven. 2147 refuted. 0 times theorem prover too weak. 36142 trivial. 0 not checked. [2021-11-20 06:51:30,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450321596] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:51:30,344 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:51:30,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 81 [2021-11-20 06:51:30,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922574376] [2021-11-20 06:51:30,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:51:30,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2021-11-20 06:51:30,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:51:30,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-11-20 06:51:30,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2021-11-20 06:51:30,351 INFO L87 Difference]: Start difference. First operand 525 states and 527 transitions. Second operand has 81 states, 81 states have (on average 3.074074074074074) internal successors, (249), 81 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:51:32,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:51:32,557 INFO L93 Difference]: Finished difference Result 1185 states and 1227 transitions. [2021-11-20 06:51:32,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-11-20 06:51:32,558 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 3.074074074074074) internal successors, (249), 81 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 524 [2021-11-20 06:51:32,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:51:32,568 INFO L225 Difference]: With dead ends: 1185 [2021-11-20 06:51:32,568 INFO L226 Difference]: Without dead ends: 1159 [2021-11-20 06:51:32,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1087 GetRequests, 1008 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2021-11-20 06:51:32,570 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1658 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 301 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1658 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 301 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:51:32,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1658 Valid, 419 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [301 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-20 06:51:32,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1159 states. [2021-11-20 06:51:32,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1159 to 645. [2021-11-20 06:51:32,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 644 states have (on average 1.0046583850931676) internal successors, (647), 644 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:51:32,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 647 transitions. [2021-11-20 06:51:32,618 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 647 transitions. Word has length 524 [2021-11-20 06:51:32,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:51:32,619 INFO L470 AbstractCegarLoop]: Abstraction has 645 states and 647 transitions. [2021-11-20 06:51:32,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 3.074074074074074) internal successors, (249), 81 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:51:32,620 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 647 transitions. [2021-11-20 06:51:32,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 645 [2021-11-20 06:51:32,626 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:51:32,627 INFO L514 BasicCegarLoop]: trace histogram [190, 190, 78, 78, 78, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:51:32,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f81992-e001-47f1-ae90-e889ef92da35/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-20 06:51:32,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f81992-e001-47f1-ae90-e889ef92da35/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-20 06:51:32,840 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:51:32,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:51:32,840 INFO L85 PathProgramCache]: Analyzing trace with hash -649956327, now seen corresponding path program 11 times [2021-11-20 06:51:32,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:51:32,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035539499] [2021-11-20 06:51:32,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:51:32,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:51:33,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:51:35,908 INFO L134 CoverageAnalysis]: Checked inductivity of 45229 backedges. 0 proven. 9087 refuted. 0 times theorem prover too weak. 36142 trivial. 0 not checked. [2021-11-20 06:51:35,909 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:51:35,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035539499] [2021-11-20 06:51:35,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035539499] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:51:35,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331143847] [2021-11-20 06:51:35,910 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 06:51:35,910 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:51:35,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f81992-e001-47f1-ae90-e889ef92da35/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:51:35,918 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f81992-e001-47f1-ae90-e889ef92da35/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:51:35,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f81992-e001-47f1-ae90-e889ef92da35/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process