./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-multidimensional/min-3-n-u.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/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_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-multidimensional/min-3-n-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/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_378792ad-a37e-4aef-81f0-182056933cb1/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 9bd7b1a8bed68c803bda82a4dd989302b30da7d6d96131ca67565e0ea166dbcb --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:36:27,326 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:36:27,329 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:36:27,383 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:36:27,383 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:36:27,388 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:36:27,391 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:36:27,395 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:36:27,398 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:36:27,403 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:36:27,405 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:36:27,406 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:36:27,407 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:36:27,409 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:36:27,412 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:36:27,414 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:36:27,416 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:36:27,417 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:36:27,423 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:36:27,434 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:36:27,436 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:36:27,437 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:36:27,441 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:36:27,442 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:36:27,453 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:36:27,454 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:36:27,454 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:36:27,455 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:36:27,456 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:36:27,457 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:36:27,457 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:36:27,458 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:36:27,459 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:36:27,460 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:36:27,462 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:36:27,462 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:36:27,463 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:36:27,463 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:36:27,463 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:36:27,464 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:36:27,465 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:36:27,466 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 06:36:27,513 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:36:27,514 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:36:27,515 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:36:27,515 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:36:27,516 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:36:27,516 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:36:27,517 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:36:27,517 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:36:27,517 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:36:27,517 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:36:27,519 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 06:36:27,519 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 06:36:27,519 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 06:36:27,519 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:36:27,520 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 06:36:27,520 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:36:27,520 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 06:36:27,520 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 06:36:27,520 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 06:36:27,521 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:36:27,521 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 06:36:27,521 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:36:27,521 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:36:27,521 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:36:27,522 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:36:27,522 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:36:27,522 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:36:27,522 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 06:36:27,523 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 06:36:27,524 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 06:36:27,525 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 06:36:27,525 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 06:36:27,525 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 06:36:27,526 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:36:27,526 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_378792ad-a37e-4aef-81f0-182056933cb1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9bd7b1a8bed68c803bda82a4dd989302b30da7d6d96131ca67565e0ea166dbcb [2021-11-20 06:36:27,818 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:36:27,844 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:36:27,847 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:36:27,849 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:36:27,850 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:36:27,852 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/array-multidimensional/min-3-n-u.c [2021-11-20 06:36:27,952 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/data/aef21a38e/ffe08a84c5414442853b3821a32bf075/FLAG18eda23f6 [2021-11-20 06:36:28,520 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:36:28,528 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/sv-benchmarks/c/array-multidimensional/min-3-n-u.c [2021-11-20 06:36:28,541 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/data/aef21a38e/ffe08a84c5414442853b3821a32bf075/FLAG18eda23f6 [2021-11-20 06:36:28,844 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/data/aef21a38e/ffe08a84c5414442853b3821a32bf075 [2021-11-20 06:36:28,846 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:36:28,848 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:36:28,860 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:36:28,860 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:36:28,864 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:36:28,865 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:36:28" (1/1) ... [2021-11-20 06:36:28,866 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@294a010 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:36:28, skipping insertion in model container [2021-11-20 06:36:28,866 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:36:28" (1/1) ... [2021-11-20 06:36:28,878 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:36:28,901 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:36:29,089 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_378792ad-a37e-4aef-81f0-182056933cb1/sv-benchmarks/c/array-multidimensional/min-3-n-u.c[321,334] [2021-11-20 06:36:29,113 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:36:29,121 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:36:29,134 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_378792ad-a37e-4aef-81f0-182056933cb1/sv-benchmarks/c/array-multidimensional/min-3-n-u.c[321,334] [2021-11-20 06:36:29,151 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:36:29,168 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:36:29,168 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:36:29 WrapperNode [2021-11-20 06:36:29,168 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:36:29,169 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:36:29,170 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:36:29,170 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:36:29,177 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:36:29" (1/1) ... [2021-11-20 06:36:29,187 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:36:29" (1/1) ... [2021-11-20 06:36:29,214 INFO L137 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 109 [2021-11-20 06:36:29,215 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:36:29,216 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:36:29,216 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:36:29,216 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:36:29,227 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:36:29" (1/1) ... [2021-11-20 06:36:29,227 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:36:29" (1/1) ... [2021-11-20 06:36:29,230 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:36:29" (1/1) ... [2021-11-20 06:36:29,231 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:36:29" (1/1) ... [2021-11-20 06:36:29,238 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:36:29" (1/1) ... [2021-11-20 06:36:29,246 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:36:29" (1/1) ... [2021-11-20 06:36:29,248 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:36:29" (1/1) ... [2021-11-20 06:36:29,251 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:36:29,252 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:36:29,252 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:36:29,253 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:36:29,254 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:36:29" (1/1) ... [2021-11-20 06:36:29,264 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:36:29,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:36:29,294 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:36:29,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:36:29,343 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 06:36:29,343 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 06:36:29,344 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 06:36:29,344 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 06:36:29,344 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:36:29,344 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:36:29,344 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 06:36:29,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 06:36:29,409 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:36:29,410 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:36:29,606 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:36:29,614 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:36:29,614 INFO L301 CfgBuilder]: Removed 9 assume(true) statements. [2021-11-20 06:36:29,616 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:36:29 BoogieIcfgContainer [2021-11-20 06:36:29,617 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:36:29,619 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:36:29,619 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:36:29,629 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:36:29,629 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:36:28" (1/3) ... [2021-11-20 06:36:29,630 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d448cd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:36:29, skipping insertion in model container [2021-11-20 06:36:29,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:36:29" (2/3) ... [2021-11-20 06:36:29,646 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d448cd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:36:29, skipping insertion in model container [2021-11-20 06:36:29,647 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:36:29" (3/3) ... [2021-11-20 06:36:29,649 INFO L111 eAbstractionObserver]: Analyzing ICFG min-3-n-u.c [2021-11-20 06:36:29,656 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:36:29,656 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 06:36:29,735 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:36:29,744 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 06:36:29,744 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 06:36:29,762 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 28 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:36:29,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-20 06:36:29,769 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:36:29,770 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:36:29,771 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:36:29,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:36:29,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1361272673, now seen corresponding path program 1 times [2021-11-20 06:36:29,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:36:29,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677514153] [2021-11-20 06:36:29,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:36:29,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:36:29,978 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:36:29,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2024465669] [2021-11-20 06:36:29,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:36:29,980 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:36:29,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:36:29,982 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:36:29,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 06:36:30,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:36:30,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-20 06:36:30,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:36:30,186 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 06:36:30,186 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:36:30,187 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:36:30,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677514153] [2021-11-20 06:36:30,189 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:36:30,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024465669] [2021-11-20 06:36:30,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024465669] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:36:30,193 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:36:30,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:36:30,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446605209] [2021-11-20 06:36:30,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:36:30,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 06:36:30,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:36:30,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 06:36:30,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 06:36:30,281 INFO L87 Difference]: Start difference. First operand has 29 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 28 states have internal predecessors, (48), 0 states have call successors, (0), 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 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:36:30,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:36:30,314 INFO L93 Difference]: Finished difference Result 56 states and 94 transitions. [2021-11-20 06:36:30,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 06:36:30,316 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-20 06:36:30,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:36:30,324 INFO L225 Difference]: With dead ends: 56 [2021-11-20 06:36:30,324 INFO L226 Difference]: Without dead ends: 25 [2021-11-20 06:36:30,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 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 06:36:30,333 INFO L933 BasicCegarLoop]: 38 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, 38 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 06:36:30,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:36:30,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-20 06:36:30,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-11-20 06:36:30,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:36:30,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2021-11-20 06:36:30,375 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 11 [2021-11-20 06:36:30,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:36:30,376 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2021-11-20 06:36:30,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:36:30,376 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2021-11-20 06:36:30,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-20 06:36:30,377 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:36:30,377 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:36:30,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 06:36:30,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-11-20 06:36:30,593 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:36:30,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:36:30,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1322753665, now seen corresponding path program 1 times [2021-11-20 06:36:30,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:36:30,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005833629] [2021-11-20 06:36:30,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:36:30,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:36:30,620 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:36:30,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [428772250] [2021-11-20 06:36:30,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:36:30,621 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:36:30,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:36:30,625 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:36:30,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 06:36:30,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:36:30,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:36:30,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:36:30,776 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 06:36:30,776 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:36:30,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:36:30,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005833629] [2021-11-20 06:36:30,777 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:36:30,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428772250] [2021-11-20 06:36:30,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428772250] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:36:30,778 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:36:30,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:36:30,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369817193] [2021-11-20 06:36:30,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:36:30,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:36:30,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:36:30,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:36:30,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:36:30,782 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:36:30,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:36:30,825 INFO L93 Difference]: Finished difference Result 48 states and 66 transitions. [2021-11-20 06:36:30,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:36:30,826 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-20 06:36:30,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:36:30,827 INFO L225 Difference]: With dead ends: 48 [2021-11-20 06:36:30,827 INFO L226 Difference]: Without dead ends: 30 [2021-11-20 06:36:30,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 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 06:36:30,830 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 6 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:36:30,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 50 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:36:30,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-20 06:36:30,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2021-11-20 06:36:30,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:36:30,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 35 transitions. [2021-11-20 06:36:30,839 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 35 transitions. Word has length 11 [2021-11-20 06:36:30,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:36:30,840 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 35 transitions. [2021-11-20 06:36:30,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:36:30,840 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 35 transitions. [2021-11-20 06:36:30,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-20 06:36:30,841 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:36:30,842 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:36:30,885 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 06:36:31,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-11-20 06:36:31,070 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:36:31,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:36:31,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1329032119, now seen corresponding path program 1 times [2021-11-20 06:36:31,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:36:31,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373254497] [2021-11-20 06:36:31,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:36:31,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:36:31,081 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:36:31,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1138079723] [2021-11-20 06:36:31,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:36:31,082 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:36:31,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:36:31,084 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:36:31,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 06:36:31,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:36:31,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:36:31,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:36:31,253 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 06:36:31,253 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:36:31,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:36:31,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373254497] [2021-11-20 06:36:31,254 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:36:31,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138079723] [2021-11-20 06:36:31,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138079723] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:36:31,255 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:36:31,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:36:31,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034345439] [2021-11-20 06:36:31,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:36:31,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:36:31,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:36:31,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:36:31,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:36:31,257 INFO L87 Difference]: Start difference. First operand 26 states and 35 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:36:31,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:36:31,353 INFO L93 Difference]: Finished difference Result 67 states and 93 transitions. [2021-11-20 06:36:31,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:36:31,354 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-20 06:36:31,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:36:31,355 INFO L225 Difference]: With dead ends: 67 [2021-11-20 06:36:31,355 INFO L226 Difference]: Without dead ends: 44 [2021-11-20 06:36:31,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:36:31,358 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 70 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:36:31,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 36 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:36:31,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-20 06:36:31,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 29. [2021-11-20 06:36:31,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 28 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:36:31,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2021-11-20 06:36:31,368 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 14 [2021-11-20 06:36:31,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:36:31,369 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2021-11-20 06:36:31,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:36:31,369 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2021-11-20 06:36:31,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-20 06:36:31,370 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:36:31,370 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:36:31,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 06:36:31,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:36:31,588 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:36:31,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:36:31,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1416884703, now seen corresponding path program 1 times [2021-11-20 06:36:31,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:36:31,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414484597] [2021-11-20 06:36:31,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:36:31,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:36:31,598 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:36:31,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1616451821] [2021-11-20 06:36:31,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:36:31,599 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:36:31,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:36:31,600 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:36:31,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 06:36:31,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:36:31,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:36:31,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:36:31,778 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:36:31,779 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:36:31,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:36:31,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414484597] [2021-11-20 06:36:31,780 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:36:31,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616451821] [2021-11-20 06:36:31,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616451821] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:36:31,781 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:36:31,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:36:31,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797411346] [2021-11-20 06:36:31,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:36:31,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:36:31,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:36:31,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:36:31,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:36:31,786 INFO L87 Difference]: Start difference. First operand 29 states and 38 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:36:31,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:36:31,887 INFO L93 Difference]: Finished difference Result 67 states and 90 transitions. [2021-11-20 06:36:31,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:36:31,888 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-20 06:36:31,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:36:31,890 INFO L225 Difference]: With dead ends: 67 [2021-11-20 06:36:31,890 INFO L226 Difference]: Without dead ends: 41 [2021-11-20 06:36:31,891 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:36:31,892 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 34 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:36:31,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 42 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:36:31,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-11-20 06:36:31,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2021-11-20 06:36:31,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 31 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:36:31,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2021-11-20 06:36:31,903 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 17 [2021-11-20 06:36:31,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:36:31,904 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2021-11-20 06:36:31,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:36:31,905 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2021-11-20 06:36:31,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-20 06:36:31,906 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:36:31,906 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:36:31,973 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-20 06:36:32,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:36:32,148 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:36:32,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:36:32,149 INFO L85 PathProgramCache]: Analyzing trace with hash 109301050, now seen corresponding path program 1 times [2021-11-20 06:36:32,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:36:32,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428747548] [2021-11-20 06:36:32,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:36:32,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:36:32,155 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:36:32,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [305564326] [2021-11-20 06:36:32,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:36:32,156 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:36:32,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:36:32,157 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:36:32,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 06:36:32,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:36:32,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:36:32,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:36:32,315 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:36:32,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:36:32,386 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:36:32,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:36:32,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428747548] [2021-11-20 06:36:32,388 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:36:32,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305564326] [2021-11-20 06:36:32,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305564326] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:36:32,389 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:36:32,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-11-20 06:36:32,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649521405] [2021-11-20 06:36:32,390 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:36:32,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:36:32,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:36:32,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:36:32,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:36:32,394 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:36:32,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:36:32,558 INFO L93 Difference]: Finished difference Result 91 states and 122 transitions. [2021-11-20 06:36:32,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:36:32,559 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-20 06:36:32,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:36:32,560 INFO L225 Difference]: With dead ends: 91 [2021-11-20 06:36:32,560 INFO L226 Difference]: Without dead ends: 62 [2021-11-20 06:36:32,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:36:32,562 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 110 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:36:32,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 51 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:36:32,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-20 06:36:32,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 53. [2021-11-20 06:36:32,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.3076923076923077) internal successors, (68), 52 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:36:32,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 68 transitions. [2021-11-20 06:36:32,574 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 68 transitions. Word has length 18 [2021-11-20 06:36:32,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:36:32,575 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 68 transitions. [2021-11-20 06:36:32,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:36:32,575 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 68 transitions. [2021-11-20 06:36:32,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-20 06:36:32,581 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:36:32,581 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:36:32,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 06:36:32,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:36:32,804 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:36:32,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:36:32,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1195208863, now seen corresponding path program 2 times [2021-11-20 06:36:32,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:36:32,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463568698] [2021-11-20 06:36:32,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:36:32,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:36:32,826 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:36:32,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [651627864] [2021-11-20 06:36:32,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:36:32,827 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:36:32,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:36:32,830 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:36:32,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 06:36:32,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-20 06:36:32,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:36:32,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:36:32,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:36:32,957 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 06:36:32,958 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:36:32,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:36:32,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463568698] [2021-11-20 06:36:32,958 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:36:32,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651627864] [2021-11-20 06:36:32,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651627864] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:36:32,960 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:36:32,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:36:32,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49352973] [2021-11-20 06:36:32,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:36:32,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:36:32,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:36:32,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:36:32,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:36:32,964 INFO L87 Difference]: Start difference. First operand 53 states and 68 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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 06:36:33,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:36:33,026 INFO L93 Difference]: Finished difference Result 121 states and 155 transitions. [2021-11-20 06:36:33,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:36:33,027 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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 21 [2021-11-20 06:36:33,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:36:33,037 INFO L225 Difference]: With dead ends: 121 [2021-11-20 06:36:33,037 INFO L226 Difference]: Without dead ends: 100 [2021-11-20 06:36:33,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:36:33,043 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 68 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:36:33,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 41 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:36:33,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-11-20 06:36:33,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 54. [2021-11-20 06:36:33,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.3018867924528301) internal successors, (69), 53 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:36:33,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2021-11-20 06:36:33,069 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 21 [2021-11-20 06:36:33,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:36:33,070 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2021-11-20 06:36:33,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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 06:36:33,070 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2021-11-20 06:36:33,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-20 06:36:33,072 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:36:33,072 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:36:33,102 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 06:36:33,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:36:33,292 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:36:33,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:36:33,293 INFO L85 PathProgramCache]: Analyzing trace with hash 238928719, now seen corresponding path program 1 times [2021-11-20 06:36:33,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:36:33,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959465061] [2021-11-20 06:36:33,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:36:33,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:36:33,301 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:36:33,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1563015774] [2021-11-20 06:36:33,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:36:33,302 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:36:33,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:36:33,303 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:36:33,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 06:36:33,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:36:33,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 06:36:33,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:36:33,541 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-20 06:36:33,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:36:33,689 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-20 06:36:33,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:36:33,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959465061] [2021-11-20 06:36:33,690 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:36:33,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563015774] [2021-11-20 06:36:33,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563015774] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:36:33,690 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:36:33,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-11-20 06:36:33,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568797050] [2021-11-20 06:36:33,691 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:36:33,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 06:36:33,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:36:33,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 06:36:33,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2021-11-20 06:36:33,695 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:36:34,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:36:34,035 INFO L93 Difference]: Finished difference Result 166 states and 217 transitions. [2021-11-20 06:36:34,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 06:36:34,036 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have 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 06:36:34,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:36:34,038 INFO L225 Difference]: With dead ends: 166 [2021-11-20 06:36:34,038 INFO L226 Difference]: Without dead ends: 115 [2021-11-20 06:36:34,039 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=151, Invalid=191, Unknown=0, NotChecked=0, Total=342 [2021-11-20 06:36:34,043 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 305 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:36:34,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 86 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:36:34,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-11-20 06:36:34,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 96. [2021-11-20 06:36:34,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.2947368421052632) internal successors, (123), 95 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:36:34,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 123 transitions. [2021-11-20 06:36:34,086 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 123 transitions. Word has length 39 [2021-11-20 06:36:34,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:36:34,086 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 123 transitions. [2021-11-20 06:36:34,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:36:34,087 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 123 transitions. [2021-11-20 06:36:34,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-20 06:36:34,096 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:36:34,097 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:36:34,134 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 06:36:34,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:36:34,321 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:36:34,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:36:34,321 INFO L85 PathProgramCache]: Analyzing trace with hash 66224111, now seen corresponding path program 2 times [2021-11-20 06:36:34,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:36:34,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583102945] [2021-11-20 06:36:34,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:36:34,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:36:34,332 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:36:34,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2107474515] [2021-11-20 06:36:34,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:36:34,333 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:36:34,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:36:34,334 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:36:34,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 06:36:34,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:36:34,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:36:34,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-20 06:36:34,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:36:34,819 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 2 proven. 55 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-11-20 06:36:34,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:36:35,152 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 2 proven. 55 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-11-20 06:36:35,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:36:35,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583102945] [2021-11-20 06:36:35,152 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:36:35,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107474515] [2021-11-20 06:36:35,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107474515] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:36:35,153 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:36:35,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-11-20 06:36:35,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357230766] [2021-11-20 06:36:35,153 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:36:35,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-20 06:36:35,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:36:35,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-20 06:36:35,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2021-11-20 06:36:35,155 INFO L87 Difference]: Start difference. First operand 96 states and 123 transitions. Second operand has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 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 06:36:35,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:36:35,893 INFO L93 Difference]: Finished difference Result 316 states and 409 transitions. [2021-11-20 06:36:35,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-20 06:36:35,894 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 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) Word has length 63 [2021-11-20 06:36:35,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:36:35,896 INFO L225 Difference]: With dead ends: 316 [2021-11-20 06:36:35,896 INFO L226 Difference]: Without dead ends: 223 [2021-11-20 06:36:35,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=589, Invalid=743, Unknown=0, NotChecked=0, Total=1332 [2021-11-20 06:36:35,898 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 711 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 323 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 711 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 323 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:36:35,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [711 Valid, 158 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [323 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 06:36:35,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-11-20 06:36:35,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 180. [2021-11-20 06:36:35,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 1.2905027932960893) internal successors, (231), 179 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:36:35,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 231 transitions. [2021-11-20 06:36:35,924 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 231 transitions. Word has length 63 [2021-11-20 06:36:35,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:36:35,925 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 231 transitions. [2021-11-20 06:36:35,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 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 06:36:35,925 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 231 transitions. [2021-11-20 06:36:35,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-20 06:36:35,926 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:36:35,927 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:36:35,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-20 06:36:36,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:36:36,148 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:36:36,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:36:36,149 INFO L85 PathProgramCache]: Analyzing trace with hash 811802927, now seen corresponding path program 3 times [2021-11-20 06:36:36,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:36:36,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334669834] [2021-11-20 06:36:36,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:36:36,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:36:36,160 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:36:36,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [57916657] [2021-11-20 06:36:36,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:36:36,161 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:36:36,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:36:36,162 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:36:36,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 06:36:36,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-20 06:36:36,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:36:36,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:36:36,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:36:36,764 INFO L134 CoverageAnalysis]: Checked inductivity of 972 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 971 trivial. 0 not checked. [2021-11-20 06:36:36,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:36:37,126 INFO L134 CoverageAnalysis]: Checked inductivity of 972 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 971 trivial. 0 not checked. [2021-11-20 06:36:37,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:36:37,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334669834] [2021-11-20 06:36:37,127 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:36:37,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57916657] [2021-11-20 06:36:37,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57916657] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:36:37,127 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:36:37,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-11-20 06:36:37,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829043408] [2021-11-20 06:36:37,131 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:36:37,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:36:37,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:36:37,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:36:37,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:36:37,135 INFO L87 Difference]: Start difference. First operand 180 states and 231 transitions. Second operand has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:36:37,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:36:37,305 INFO L93 Difference]: Finished difference Result 852 states and 1104 transitions. [2021-11-20 06:36:37,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:36:37,306 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-11-20 06:36:37,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:36:37,313 INFO L225 Difference]: With dead ends: 852 [2021-11-20 06:36:37,313 INFO L226 Difference]: Without dead ends: 703 [2021-11-20 06:36:37,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:36:37,319 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 267 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:36:37,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 78 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:36:37,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2021-11-20 06:36:37,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 480. [2021-11-20 06:36:37,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 479 states have (on average 1.2713987473903967) internal successors, (609), 479 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:36:37,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 609 transitions. [2021-11-20 06:36:37,386 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 609 transitions. Word has length 111 [2021-11-20 06:36:37,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:36:37,387 INFO L470 AbstractCegarLoop]: Abstraction has 480 states and 609 transitions. [2021-11-20 06:36:37,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:36:37,387 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 609 transitions. [2021-11-20 06:36:37,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2021-11-20 06:36:37,402 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:36:37,402 INFO L514 BasicCegarLoop]: trace histogram [88, 88, 88, 88, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:36:37,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-20 06:36:37,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:36:37,624 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:36:37,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:36:37,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1613933369, now seen corresponding path program 4 times [2021-11-20 06:36:37,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:36:37,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808046768] [2021-11-20 06:36:37,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:36:37,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:36:37,652 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:36:37,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1539525949] [2021-11-20 06:36:37,652 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 06:36:37,652 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:36:37,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:36:37,654 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:36:37,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 06:36:37,940 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 06:36:37,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:36:37,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 852 conjuncts, 275 conjunts are in the unsatisfiable core [2021-11-20 06:36:37,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:39:39,901 WARN L228 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2021-11-20 06:39:39,902 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:39:39,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808046768] [2021-11-20 06:39:39,902 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:39:39,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539525949] [2021-11-20 06:39:39,902 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") [2021-11-20 06:39:39,902 INFO L186 FreeRefinementEngine]: Found 0 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:39:39,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-11-20 06:39:39,902 ERROR L172 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2021-11-20 06:39:39,903 INFO L628 BasicCegarLoop]: Counterexample might be feasible [2021-11-20 06:39:39,917 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-20 06:39:39,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2021-11-20 06:39:39,953 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-20 06:39:40,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-20 06:39:40,123 INFO L732 BasicCegarLoop]: Path program histogram: [4, 2, 1, 1, 1, 1] [2021-11-20 06:39:40,128 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-20 06:39:40,256 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 06:39:40 BoogieIcfgContainer [2021-11-20 06:39:40,256 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-20 06:39:40,257 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-20 06:39:40,257 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-20 06:39:40,257 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-20 06:39:40,258 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:36:29" (3/4) ... [2021-11-20 06:39:40,261 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-20 06:39:40,262 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-20 06:39:40,262 INFO L158 Benchmark]: Toolchain (without parser) took 191414.22ms. Allocated memory was 88.1MB in the beginning and 159.4MB in the end (delta: 71.3MB). Free memory was 56.3MB in the beginning and 120.4MB in the end (delta: -64.1MB). Peak memory consumption was 6.2MB. Max. memory is 16.1GB. [2021-11-20 06:39:40,263 INFO L158 Benchmark]: CDTParser took 0.41ms. Allocated memory is still 88.1MB. Free memory is still 42.6MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 06:39:40,263 INFO L158 Benchmark]: CACSL2BoogieTranslator took 309.14ms. Allocated memory was 88.1MB in the beginning and 109.1MB in the end (delta: 21.0MB). Free memory was 56.2MB in the beginning and 84.9MB in the end (delta: -28.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-20 06:39:40,264 INFO L158 Benchmark]: Boogie Procedure Inliner took 45.57ms. Allocated memory is still 109.1MB. Free memory was 84.9MB in the beginning and 83.2MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 06:39:40,264 INFO L158 Benchmark]: Boogie Preprocessor took 35.50ms. Allocated memory is still 109.1MB. Free memory was 83.2MB in the beginning and 82.0MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 06:39:40,264 INFO L158 Benchmark]: RCFGBuilder took 364.86ms. Allocated memory is still 109.1MB. Free memory was 82.0MB in the beginning and 71.1MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-20 06:39:40,265 INFO L158 Benchmark]: TraceAbstraction took 190637.44ms. Allocated memory was 109.1MB in the beginning and 159.4MB in the end (delta: 50.3MB). Free memory was 70.6MB in the beginning and 121.5MB in the end (delta: -50.9MB). Peak memory consumption was 880.0kB. Max. memory is 16.1GB. [2021-11-20 06:39:40,265 INFO L158 Benchmark]: Witness Printer took 4.70ms. Allocated memory is still 159.4MB. Free memory was 121.5MB in the beginning and 120.4MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 06:39:40,267 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.41ms. Allocated memory is still 88.1MB. Free memory is still 42.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 309.14ms. Allocated memory was 88.1MB in the beginning and 109.1MB in the end (delta: 21.0MB). Free memory was 56.2MB in the beginning and 84.9MB in the end (delta: -28.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 45.57ms. Allocated memory is still 109.1MB. Free memory was 84.9MB in the beginning and 83.2MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 35.50ms. Allocated memory is still 109.1MB. Free memory was 83.2MB in the beginning and 82.0MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 364.86ms. Allocated memory is still 109.1MB. Free memory was 82.0MB in the beginning and 71.1MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 190637.44ms. Allocated memory was 109.1MB in the beginning and 159.4MB in the end (delta: 50.3MB). Free memory was 70.6MB in the beginning and 121.5MB in the end (delta: -50.9MB). Peak memory consumption was 880.0kB. Max. memory is 16.1GB. * Witness Printer took 4.70ms. Allocated memory is still 159.4MB. Free memory was 121.5MB in the beginning and 120.4MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 7]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L16] int i,j,k; [L17] int m=1000,n=1500,p=1800; [L18] int A [m][n][p]; [L19] int min; [L22] i=0 [L23] j=0 [L24] k=0 [L25] COND TRUE i < m [L26] j=0 [L27] k=0 [L28] COND TRUE j < n [L29] k=0 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND FALSE !(k < p) [L34] j=j+1 [L28] COND FALSE !(j < n) [L36] i=i+1 [L25] COND TRUE i < m [L26] j=0 [L27] k=0 [L28] COND TRUE j < n [L29] k=0 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND FALSE !(k < p) [L34] j=j+1 [L28] COND FALSE !(j < n) [L36] i=i+1 [L25] COND TRUE i < m [L26] j=0 [L27] k=0 [L28] COND TRUE j < n [L29] k=0 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND FALSE !(k < p) [L34] j=j+1 [L28] COND FALSE !(j < n) [L36] i=i+1 [L25] COND TRUE i < m [L26] j=0 [L27] k=0 [L28] COND TRUE j < n [L29] k=0 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND FALSE !(k < p) [L34] j=j+1 [L28] COND FALSE !(j < n) [L36] i=i+1 [L25] COND FALSE !(i < m) [L40] i=0 [L41] j=0 [L42] k=0 [L43] EXPR A [0][0][0] [L43] min=A [0][0][0] [L44] COND TRUE i < m [L45] j=0 [L46] k=0 [L47] COND TRUE j < n [L48] k=0 [L49] COND TRUE k < p [L50] EXPR A[i][j][k] [L50] COND TRUE A[i][j][k]=min) [L6] COND TRUE !(cond) [L7] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 190.4s, OverallIterations: 10, TraceHistogramMax: 88, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 1.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1571 SdHoareTripleChecker+Valid, 1.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1571 mSDsluCounter, 580 SdHoareTripleChecker+Invalid, 0.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 346 mSDsCounter, 608 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 391 IncrementalHoareTripleChecker+Invalid, 999 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 608 mSolverCounterUnsat, 234 mSDtfsCounter, 391 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 543 GetRequests, 468 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=480occurred in iteration=9, InterpolantAutomatonStates: 69, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 9 MinimizatonAttempts, 368 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 184.5s InterpolantComputationTime, 716 NumberOfCodeBlocks, 522 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 523 ConstructedInterpolants, 0 QuantifiedInterpolants, 1623 SizeOfPredicates, 16 NumberOfNonLiveVariables, 1873 ConjunctsInSsa, 316 ConjunctsInUnsatCore, 13 InterpolantComputations, 5 PerfectInterpolantSequences, 2311/2445 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/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_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-multidimensional/min-3-n-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/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 9bd7b1a8bed68c803bda82a4dd989302b30da7d6d96131ca67565e0ea166dbcb --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:39:42,727 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:39:42,731 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:39:42,800 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:39:42,801 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:39:42,806 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:39:42,809 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:39:42,818 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:39:42,822 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:39:42,830 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:39:42,831 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:39:42,833 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:39:42,833 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:39:42,834 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:39:42,836 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:39:42,837 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:39:42,839 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:39:42,840 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:39:42,842 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:39:42,845 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:39:42,847 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:39:42,848 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:39:42,850 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:39:42,851 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:39:42,855 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:39:42,856 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:39:42,856 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:39:42,857 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:39:42,858 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:39:42,859 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:39:42,860 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:39:42,861 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:39:42,863 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:39:42,864 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:39:42,866 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:39:42,866 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:39:42,867 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:39:42,868 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:39:42,869 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:39:42,870 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:39:42,871 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:39:42,872 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-11-20 06:39:42,921 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:39:42,922 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:39:42,922 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:39:42,923 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:39:42,924 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:39:42,924 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:39:42,925 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:39:42,925 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:39:42,925 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:39:42,926 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:39:42,926 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 06:39:42,926 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 06:39:42,927 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:39:42,927 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 06:39:42,927 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:39:42,928 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 06:39:42,928 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-20 06:39:42,928 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-20 06:39:42,928 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-20 06:39:42,929 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 06:39:42,929 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 06:39:42,929 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:39:42,929 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 06:39:42,930 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:39:42,930 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:39:42,930 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:39:42,930 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:39:42,931 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:39:42,931 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:39:42,931 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 06:39:42,932 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-20 06:39:42,932 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-20 06:39:42,932 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 06:39:42,932 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 06:39:42,933 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 06:39:42,933 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:39:42,933 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 06:39:42,933 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9bd7b1a8bed68c803bda82a4dd989302b30da7d6d96131ca67565e0ea166dbcb [2021-11-20 06:39:43,297 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:39:43,319 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:39:43,322 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:39:43,323 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:39:43,324 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:39:43,326 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/array-multidimensional/min-3-n-u.c [2021-11-20 06:39:43,396 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/data/e19e2850e/13b815eca19d4f9faa9194ae5f97795d/FLAG8e2385855 [2021-11-20 06:39:43,965 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:39:43,970 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/sv-benchmarks/c/array-multidimensional/min-3-n-u.c [2021-11-20 06:39:43,980 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/data/e19e2850e/13b815eca19d4f9faa9194ae5f97795d/FLAG8e2385855 [2021-11-20 06:39:44,308 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/data/e19e2850e/13b815eca19d4f9faa9194ae5f97795d [2021-11-20 06:39:44,311 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:39:44,319 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:39:44,321 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:39:44,321 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:39:44,325 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:39:44,326 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:39:44" (1/1) ... [2021-11-20 06:39:44,327 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b7222e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:39:44, skipping insertion in model container [2021-11-20 06:39:44,329 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:39:44" (1/1) ... [2021-11-20 06:39:44,337 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:39:44,359 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:39:44,528 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_378792ad-a37e-4aef-81f0-182056933cb1/sv-benchmarks/c/array-multidimensional/min-3-n-u.c[321,334] [2021-11-20 06:39:44,562 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:39:44,578 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:39:44,600 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_378792ad-a37e-4aef-81f0-182056933cb1/sv-benchmarks/c/array-multidimensional/min-3-n-u.c[321,334] [2021-11-20 06:39:44,632 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:39:44,650 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:39:44,651 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:39:44 WrapperNode [2021-11-20 06:39:44,651 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:39:44,653 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:39:44,653 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:39:44,653 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:39:44,662 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:39:44" (1/1) ... [2021-11-20 06:39:44,680 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:39:44" (1/1) ... [2021-11-20 06:39:44,749 INFO L137 Inliner]: procedures = 16, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 108 [2021-11-20 06:39:44,750 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:39:44,751 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:39:44,751 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:39:44,752 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:39:44,763 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:39:44" (1/1) ... [2021-11-20 06:39:44,763 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:39:44" (1/1) ... [2021-11-20 06:39:44,782 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:39:44" (1/1) ... [2021-11-20 06:39:44,784 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:39:44" (1/1) ... [2021-11-20 06:39:44,792 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:39:44" (1/1) ... [2021-11-20 06:39:44,798 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:39:44" (1/1) ... [2021-11-20 06:39:44,800 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:39:44" (1/1) ... [2021-11-20 06:39:44,803 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:39:44,804 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:39:44,805 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:39:44,805 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:39:44,806 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:39:44" (1/1) ... [2021-11-20 06:39:44,814 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:39:44,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:39:44,838 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:39:44,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:39:44,914 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 06:39:44,914 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-20 06:39:44,914 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 06:39:44,915 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-20 06:39:44,915 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:39:44,915 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:39:44,915 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 06:39:44,915 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-20 06:39:45,011 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:39:45,013 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:39:45,511 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:39:45,520 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:39:45,520 INFO L301 CfgBuilder]: Removed 9 assume(true) statements. [2021-11-20 06:39:45,522 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:39:45 BoogieIcfgContainer [2021-11-20 06:39:45,522 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:39:45,525 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:39:45,525 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:39:45,529 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:39:45,529 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:39:44" (1/3) ... [2021-11-20 06:39:45,531 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27ae3f4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:39:45, skipping insertion in model container [2021-11-20 06:39:45,531 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:39:44" (2/3) ... [2021-11-20 06:39:45,531 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27ae3f4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:39:45, skipping insertion in model container [2021-11-20 06:39:45,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:39:45" (3/3) ... [2021-11-20 06:39:45,534 INFO L111 eAbstractionObserver]: Analyzing ICFG min-3-n-u.c [2021-11-20 06:39:45,540 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:39:45,541 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 06:39:45,602 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:39:45,610 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 06:39:45,610 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 06:39:45,628 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 28 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:39:45,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-20 06:39:45,635 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:39:45,636 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:39:45,636 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:39:45,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:39:45,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1361272673, now seen corresponding path program 1 times [2021-11-20 06:39:45,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:39:45,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2082830323] [2021-11-20 06:39:45,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:39:45,661 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:39:45,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:39:45,667 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:39:45,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-20 06:39:45,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:45,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-20 06:39:45,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:39:45,929 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 06:39:45,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:39:45,999 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 06:39:46,000 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:39:46,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2082830323] [2021-11-20 06:39:46,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2082830323] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:39:46,003 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:39:46,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-20 06:39:46,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564105239] [2021-11-20 06:39:46,008 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:39:46,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 06:39:46,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:39:46,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 06:39:46,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 06:39:46,091 INFO L87 Difference]: Start difference. First operand has 29 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 28 states have internal predecessors, (48), 0 states have call successors, (0), 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 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:39:46,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:39:46,122 INFO L93 Difference]: Finished difference Result 56 states and 94 transitions. [2021-11-20 06:39:46,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 06:39:46,125 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-20 06:39:46,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:39:46,133 INFO L225 Difference]: With dead ends: 56 [2021-11-20 06:39:46,133 INFO L226 Difference]: Without dead ends: 25 [2021-11-20 06:39:46,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 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 06:39:46,142 INFO L933 BasicCegarLoop]: 38 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, 38 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 06:39:46,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:39:46,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-20 06:39:46,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-11-20 06:39:46,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:39:46,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2021-11-20 06:39:46,192 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 11 [2021-11-20 06:39:46,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:39:46,193 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2021-11-20 06:39:46,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:39:46,194 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2021-11-20 06:39:46,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-20 06:39:46,196 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:39:46,196 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:39:46,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-20 06:39:46,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:39:46,421 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:39:46,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:39:46,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1322753665, now seen corresponding path program 1 times [2021-11-20 06:39:46,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:39:46,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [836353305] [2021-11-20 06:39:46,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:39:46,435 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:39:46,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:39:46,438 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:39:46,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-20 06:39:46,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:46,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:39:46,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:39:46,701 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 06:39:46,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:39:46,783 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 06:39:46,784 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:39:46,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [836353305] [2021-11-20 06:39:46,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [836353305] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:39:46,785 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:39:46,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-20 06:39:46,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726334583] [2021-11-20 06:39:46,786 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:39:46,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:39:46,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:39:46,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:39:46,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:39:46,789 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 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 06:39:47,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:39:47,112 INFO L93 Difference]: Finished difference Result 49 states and 68 transitions. [2021-11-20 06:39:47,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:39:47,119 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 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 11 [2021-11-20 06:39:47,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:39:47,120 INFO L225 Difference]: With dead ends: 49 [2021-11-20 06:39:47,120 INFO L226 Difference]: Without dead ends: 31 [2021-11-20 06:39:47,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:39:47,123 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 29 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:39:47,124 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 46 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 06:39:47,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-20 06:39:47,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-11-20 06:39:47,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.4) internal successors, (42), 30 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:39:47,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2021-11-20 06:39:47,135 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 11 [2021-11-20 06:39:47,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:39:47,136 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2021-11-20 06:39:47,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 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 06:39:47,137 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2021-11-20 06:39:47,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-20 06:39:47,138 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:39:47,138 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:39:47,156 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-20 06:39:47,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:39:47,353 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:39:47,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:39:47,354 INFO L85 PathProgramCache]: Analyzing trace with hash 949119361, now seen corresponding path program 1 times [2021-11-20 06:39:47,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:39:47,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2013496629] [2021-11-20 06:39:47,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:39:47,355 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:39:47,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:39:47,356 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:39:47,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-20 06:39:47,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:47,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:39:47,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:39:47,533 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:39:47,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:39:47,635 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:39:47,636 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:39:47,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2013496629] [2021-11-20 06:39:47,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2013496629] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:39:47,638 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:39:47,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-20 06:39:47,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417528410] [2021-11-20 06:39:47,645 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:39:47,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:39:47,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:39:47,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:39:47,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:39:47,652 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:39:48,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:39:48,236 INFO L93 Difference]: Finished difference Result 81 states and 115 transitions. [2021-11-20 06:39:48,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:39:48,237 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-20 06:39:48,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:39:48,238 INFO L225 Difference]: With dead ends: 81 [2021-11-20 06:39:48,239 INFO L226 Difference]: Without dead ends: 56 [2021-11-20 06:39:48,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:39:48,241 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 62 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:39:48,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 44 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 06:39:48,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-20 06:39:48,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 51. [2021-11-20 06:39:48,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.36) internal successors, (68), 50 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:39:48,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 68 transitions. [2021-11-20 06:39:48,260 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 68 transitions. Word has length 17 [2021-11-20 06:39:48,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:39:48,261 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 68 transitions. [2021-11-20 06:39:48,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:39:48,261 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 68 transitions. [2021-11-20 06:39:48,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-20 06:39:48,263 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:39:48,263 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:39:48,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-20 06:39:48,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:39:48,480 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:39:48,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:39:48,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1723209855, now seen corresponding path program 1 times [2021-11-20 06:39:48,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:39:48,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1837945564] [2021-11-20 06:39:48,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:39:48,482 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:39:48,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:39:48,484 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:39:48,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-20 06:39:48,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:48,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:39:48,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:39:48,716 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-20 06:39:48,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:39:48,850 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-20 06:39:48,851 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:39:48,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1837945564] [2021-11-20 06:39:48,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1837945564] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:39:48,856 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:39:48,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-20 06:39:48,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210474450] [2021-11-20 06:39:48,861 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:39:48,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:39:48,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:39:48,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:39:48,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:39:48,865 INFO L87 Difference]: Start difference. First operand 51 states and 68 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:39:49,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:39:49,430 INFO L93 Difference]: Finished difference Result 126 states and 179 transitions. [2021-11-20 06:39:49,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:39:49,431 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-20 06:39:49,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:39:49,432 INFO L225 Difference]: With dead ends: 126 [2021-11-20 06:39:49,433 INFO L226 Difference]: Without dead ends: 80 [2021-11-20 06:39:49,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:39:49,435 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 67 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:39:49,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 54 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 06:39:49,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-20 06:39:49,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 75. [2021-11-20 06:39:49,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.2972972972972974) internal successors, (96), 74 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:39:49,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 96 transitions. [2021-11-20 06:39:49,456 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 96 transitions. Word has length 29 [2021-11-20 06:39:49,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:39:49,457 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 96 transitions. [2021-11-20 06:39:49,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:39:49,457 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 96 transitions. [2021-11-20 06:39:49,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-20 06:39:49,459 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:39:49,459 INFO L514 BasicCegarLoop]: trace histogram [8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:39:49,474 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-20 06:39:49,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:39:49,679 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:39:49,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:39:49,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1070930817, now seen corresponding path program 1 times [2021-11-20 06:39:49,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:39:49,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1220152965] [2021-11-20 06:39:49,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:39:49,682 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:39:49,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:39:49,683 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:39:49,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-20 06:39:49,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:49,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 06:39:49,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:39:50,068 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-20 06:39:50,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:39:50,295 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-20 06:39:50,296 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:39:50,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1220152965] [2021-11-20 06:39:50,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1220152965] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:39:50,297 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:39:50,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-11-20 06:39:50,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563163790] [2021-11-20 06:39:50,297 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:39:50,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 06:39:50,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:39:50,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 06:39:50,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:39:50,300 INFO L87 Difference]: Start difference. First operand 75 states and 96 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:39:51,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:39:51,653 INFO L93 Difference]: Finished difference Result 220 states and 305 transitions. [2021-11-20 06:39:51,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 06:39:51,654 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-20 06:39:51,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:39:51,657 INFO L225 Difference]: With dead ends: 220 [2021-11-20 06:39:51,657 INFO L226 Difference]: Without dead ends: 152 [2021-11-20 06:39:51,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:39:51,659 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 151 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:39:51,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 127 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-20 06:39:51,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-11-20 06:39:51,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 139. [2021-11-20 06:39:51,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 1.2753623188405796) internal successors, (176), 138 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:39:51,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 176 transitions. [2021-11-20 06:39:51,692 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 176 transitions. Word has length 37 [2021-11-20 06:39:51,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:39:51,693 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 176 transitions. [2021-11-20 06:39:51,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:39:51,693 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 176 transitions. [2021-11-20 06:39:51,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-20 06:39:51,695 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:39:51,696 INFO L514 BasicCegarLoop]: trace histogram [24, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:39:51,716 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-20 06:39:51,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:39:51,912 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:39:51,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:39:51,913 INFO L85 PathProgramCache]: Analyzing trace with hash 580912001, now seen corresponding path program 2 times [2021-11-20 06:39:51,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:39:51,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [918589301] [2021-11-20 06:39:51,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:39:51,914 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:39:51,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:39:51,915 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:39:51,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-20 06:39:51,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-20 06:39:51,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:39:51,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:39:51,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:39:52,241 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 403 trivial. 0 not checked. [2021-11-20 06:39:52,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:39:52,477 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 403 trivial. 0 not checked. [2021-11-20 06:39:52,478 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:39:52,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [918589301] [2021-11-20 06:39:52,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [918589301] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:39:52,478 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:39:52,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-20 06:39:52,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764682267] [2021-11-20 06:39:52,479 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:39:52,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:39:52,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:39:52,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:39:52,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:39:52,481 INFO L87 Difference]: Start difference. First operand 139 states and 176 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:39:53,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:39:53,058 INFO L93 Difference]: Finished difference Result 281 states and 363 transitions. [2021-11-20 06:39:53,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:39:53,059 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-20 06:39:53,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:39:53,063 INFO L225 Difference]: With dead ends: 281 [2021-11-20 06:39:53,063 INFO L226 Difference]: Without dead ends: 233 [2021-11-20 06:39:53,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:39:53,065 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 118 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:39:53,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 43 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 06:39:53,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-11-20 06:39:53,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 185. [2021-11-20 06:39:53,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 1.2880434782608696) internal successors, (237), 184 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:39:53,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 237 transitions. [2021-11-20 06:39:53,106 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 237 transitions. Word has length 53 [2021-11-20 06:39:53,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:39:53,107 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 237 transitions. [2021-11-20 06:39:53,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:39:53,108 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 237 transitions. [2021-11-20 06:39:53,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-20 06:39:53,114 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:39:53,114 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:39:53,140 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-20 06:39:53,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:39:53,333 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:39:53,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:39:53,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1991188929, now seen corresponding path program 1 times [2021-11-20 06:39:53,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:39:53,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2140356465] [2021-11-20 06:39:53,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:39:53,335 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:39:53,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:39:53,336 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:39:53,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-20 06:39:53,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:53,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 06:39:53,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:39:54,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1358 backedges. 154 proven. 21 refuted. 0 times theorem prover too weak. 1183 trivial. 0 not checked. [2021-11-20 06:39:54,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:39:55,125 INFO L134 CoverageAnalysis]: Checked inductivity of 1358 backedges. 154 proven. 21 refuted. 0 times theorem prover too weak. 1183 trivial. 0 not checked. [2021-11-20 06:39:55,125 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:39:55,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2140356465] [2021-11-20 06:39:55,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2140356465] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:39:55,126 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:39:55,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-11-20 06:39:55,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948230308] [2021-11-20 06:39:55,127 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:39:55,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 06:39:55,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:39:55,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 06:39:55,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2021-11-20 06:39:55,133 INFO L87 Difference]: Start difference. First operand 185 states and 237 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:39:59,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:39:59,696 INFO L93 Difference]: Finished difference Result 562 states and 780 transitions. [2021-11-20 06:39:59,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-20 06:39:59,697 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2021-11-20 06:39:59,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:39:59,700 INFO L225 Difference]: With dead ends: 562 [2021-11-20 06:39:59,700 INFO L226 Difference]: Without dead ends: 388 [2021-11-20 06:39:59,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=223, Invalid=377, Unknown=0, NotChecked=0, Total=600 [2021-11-20 06:39:59,703 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 563 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 563 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-11-20 06:39:59,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [563 Valid, 326 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2021-11-20 06:39:59,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-11-20 06:39:59,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 361. [2021-11-20 06:39:59,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 360 states have (on average 1.2805555555555554) internal successors, (461), 360 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:39:59,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 461 transitions. [2021-11-20 06:39:59,760 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 461 transitions. Word has length 143 [2021-11-20 06:39:59,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:39:59,761 INFO L470 AbstractCegarLoop]: Abstraction has 361 states and 461 transitions. [2021-11-20 06:39:59,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:39:59,761 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 461 transitions. [2021-11-20 06:39:59,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2021-11-20 06:39:59,768 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:39:59,768 INFO L514 BasicCegarLoop]: trace histogram [56, 56, 56, 56, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:39:59,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-20 06:39:59,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:39:59,991 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:39:59,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:39:59,992 INFO L85 PathProgramCache]: Analyzing trace with hash 669470145, now seen corresponding path program 2 times [2021-11-20 06:39:59,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:39:59,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [177790175] [2021-11-20 06:39:59,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:39:59,995 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:39:59,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:39:59,997 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:40:00,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-20 06:40:00,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:40:00,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:40:00,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-20 06:40:00,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:40:01,835 INFO L134 CoverageAnalysis]: Checked inductivity of 6670 backedges. 682 proven. 105 refuted. 0 times theorem prover too weak. 5883 trivial. 0 not checked. [2021-11-20 06:40:01,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:40:03,729 INFO L134 CoverageAnalysis]: Checked inductivity of 6670 backedges. 682 proven. 105 refuted. 0 times theorem prover too weak. 5883 trivial. 0 not checked. [2021-11-20 06:40:03,730 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:40:03,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [177790175] [2021-11-20 06:40:03,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [177790175] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:40:03,730 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:40:03,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-11-20 06:40:03,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989191037] [2021-11-20 06:40:03,731 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:40:03,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-20 06:40:03,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:40:03,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-20 06:40:03,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=801, Unknown=0, NotChecked=0, Total=1122 [2021-11-20 06:40:03,733 INFO L87 Difference]: Start difference. First operand 361 states and 461 transitions. Second operand has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 34 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 06:40:16,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:40:16,275 INFO L93 Difference]: Finished difference Result 1114 states and 1540 transitions. [2021-11-20 06:40:16,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-20 06:40:16,276 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 34 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 271 [2021-11-20 06:40:16,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:40:16,282 INFO L225 Difference]: With dead ends: 1114 [2021-11-20 06:40:16,282 INFO L226 Difference]: Without dead ends: 772 [2021-11-20 06:40:16,285 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 555 GetRequests, 508 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=831, Invalid=1521, Unknown=0, NotChecked=0, Total=2352 [2021-11-20 06:40:16,289 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 1765 mSDsluCounter, 1090 mSDsCounter, 0 mSdLazyCounter, 1617 mSolverCounterSat, 768 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1765 SdHoareTripleChecker+Valid, 1171 SdHoareTripleChecker+Invalid, 2385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 768 IncrementalHoareTripleChecker+Valid, 1617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:40:16,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1765 Valid, 1171 Invalid, 2385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [768 Valid, 1617 Invalid, 0 Unknown, 0 Unchecked, 9.7s Time] [2021-11-20 06:40:16,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2021-11-20 06:40:16,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 713. [2021-11-20 06:40:16,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 712 states have (on average 1.276685393258427) internal successors, (909), 712 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:40:16,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 909 transitions. [2021-11-20 06:40:16,372 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 909 transitions. Word has length 271 [2021-11-20 06:40:16,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:40:16,372 INFO L470 AbstractCegarLoop]: Abstraction has 713 states and 909 transitions. [2021-11-20 06:40:16,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 34 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 06:40:16,373 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 909 transitions. [2021-11-20 06:40:16,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2021-11-20 06:40:16,394 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:40:16,394 INFO L514 BasicCegarLoop]: trace histogram [120, 120, 120, 120, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:40:16,430 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-20 06:40:16,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:40:16,608 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:40:16,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:40:16,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1185916353, now seen corresponding path program 3 times [2021-11-20 06:40:16,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:40:16,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [776641661] [2021-11-20 06:40:16,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:40:16,613 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:40:16,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:40:16,632 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:40:16,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-20 06:40:17,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-20 06:40:17,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:40:17,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 06:40:17,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:40:19,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-20 06:40:19,877 INFO L134 CoverageAnalysis]: Checked inductivity of 29582 backedges. 249 proven. 0 refuted. 0 times theorem prover too weak. 29333 trivial. 0 not checked. [2021-11-20 06:40:19,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:40:22,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 4 [2021-11-20 06:40:22,924 INFO L134 CoverageAnalysis]: Checked inductivity of 29582 backedges. 249 proven. 0 refuted. 0 times theorem prover too weak. 29333 trivial. 0 not checked. [2021-11-20 06:40:22,924 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:40:22,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [776641661] [2021-11-20 06:40:22,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [776641661] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:40:22,925 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:40:22,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 6] imperfect sequences [] total 11 [2021-11-20 06:40:22,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707419419] [2021-11-20 06:40:22,926 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:40:22,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 06:40:22,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:40:22,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 06:40:22,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:40:22,929 INFO L87 Difference]: Start difference. First operand 713 states and 909 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 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 06:40:25,473 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:40:26,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:40:26,169 INFO L93 Difference]: Finished difference Result 1462 states and 1907 transitions. [2021-11-20 06:40:26,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:40:26,171 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 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 527 [2021-11-20 06:40:26,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:40:26,178 INFO L225 Difference]: With dead ends: 1462 [2021-11-20 06:40:26,178 INFO L226 Difference]: Without dead ends: 895 [2021-11-20 06:40:26,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1053 GetRequests, 1043 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-11-20 06:40:26,181 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 46 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 20 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:40:26,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 60 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 169 Invalid, 1 Unknown, 0 Unchecked, 3.1s Time] [2021-11-20 06:40:26,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2021-11-20 06:40:26,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 713. [2021-11-20 06:40:26,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 712 states have (on average 1.2752808988764044) internal successors, (908), 712 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:40:26,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 908 transitions. [2021-11-20 06:40:26,253 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 908 transitions. Word has length 527 [2021-11-20 06:40:26,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:40:26,254 INFO L470 AbstractCegarLoop]: Abstraction has 713 states and 908 transitions. [2021-11-20 06:40:26,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 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 06:40:26,255 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 908 transitions. [2021-11-20 06:40:26,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2021-11-20 06:40:26,270 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:40:26,271 INFO L514 BasicCegarLoop]: trace histogram [120, 120, 120, 119, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:40:26,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-20 06:40:26,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:40:26,484 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:40:26,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:40:26,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1615866625, now seen corresponding path program 1 times [2021-11-20 06:40:26,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:40:26,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2032793175] [2021-11-20 06:40:26,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:40:26,487 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:40:26,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:40:26,488 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:40:26,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-20 06:40:27,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:27,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 1057 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-20 06:40:27,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:40:30,070 INFO L134 CoverageAnalysis]: Checked inductivity of 29582 backedges. 2890 proven. 465 refuted. 0 times theorem prover too weak. 26227 trivial. 0 not checked. [2021-11-20 06:40:30,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:40:35,750 INFO L134 CoverageAnalysis]: Checked inductivity of 29582 backedges. 2890 proven. 465 refuted. 0 times theorem prover too weak. 26227 trivial. 0 not checked. [2021-11-20 06:40:35,750 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:40:35,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2032793175] [2021-11-20 06:40:35,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2032793175] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:40:35,751 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:40:35,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 66 [2021-11-20 06:40:35,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807014729] [2021-11-20 06:40:35,752 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:40:35,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-11-20 06:40:35,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:40:35,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-11-20 06:40:35,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1153, Invalid=3137, Unknown=0, NotChecked=0, Total=4290 [2021-11-20 06:40:35,759 INFO L87 Difference]: Start difference. First operand 713 states and 908 transitions. Second operand has 66 states, 66 states have (on average 1.4393939393939394) internal successors, (95), 66 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:41:26,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:41:26,877 INFO L93 Difference]: Finished difference Result 2218 states and 3058 transitions. [2021-11-20 06:41:26,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-11-20 06:41:26,878 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.4393939393939394) internal successors, (95), 66 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 527 [2021-11-20 06:41:26,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:41:26,889 INFO L225 Difference]: With dead ends: 2218 [2021-11-20 06:41:26,889 INFO L226 Difference]: Without dead ends: 1540 [2021-11-20 06:41:26,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1083 GetRequests, 988 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1488 ImplicationChecksByTransitivity, 25.0s TimeCoverageRelationStatistics Valid=3199, Invalid=6113, Unknown=0, NotChecked=0, Total=9312 [2021-11-20 06:41:26,897 INFO L933 BasicCegarLoop]: 145 mSDtfsCounter, 7379 mSDsluCounter, 4225 mSDsCounter, 0 mSdLazyCounter, 6321 mSolverCounterSat, 2531 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7379 SdHoareTripleChecker+Valid, 4370 SdHoareTripleChecker+Invalid, 8852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2531 IncrementalHoareTripleChecker+Valid, 6321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:41:26,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7379 Valid, 4370 Invalid, 8852 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2531 Valid, 6321 Invalid, 0 Unknown, 0 Unchecked, 31.2s Time] [2021-11-20 06:41:26,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1540 states. [2021-11-20 06:41:27,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1540 to 1417. [2021-11-20 06:41:27,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1417 states, 1416 states have (on average 1.2740112994350283) internal successors, (1804), 1416 states have internal predecessors, (1804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:41:27,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1417 states to 1417 states and 1804 transitions. [2021-11-20 06:41:27,051 INFO L78 Accepts]: Start accepts. Automaton has 1417 states and 1804 transitions. Word has length 527 [2021-11-20 06:41:27,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:41:27,053 INFO L470 AbstractCegarLoop]: Abstraction has 1417 states and 1804 transitions. [2021-11-20 06:41:27,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.4393939393939394) internal successors, (95), 66 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:41:27,054 INFO L276 IsEmpty]: Start isEmpty. Operand 1417 states and 1804 transitions. [2021-11-20 06:41:27,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1040 [2021-11-20 06:41:27,068 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:41:27,069 INFO L514 BasicCegarLoop]: trace histogram [248, 248, 248, 247, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:41:27,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-20 06:41:27,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:41:27,284 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:41:27,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:41:27,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1551178497, now seen corresponding path program 2 times [2021-11-20 06:41:27,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:41:27,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [925007520] [2021-11-20 06:41:27,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:41:27,288 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:41:27,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:41:27,291 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:41:27,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-20 06:41:29,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:41:29,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:41:29,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 2081 conjuncts, 65 conjunts are in the unsatisfiable core [2021-11-20 06:41:29,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:41:35,445 INFO L134 CoverageAnalysis]: Checked inductivity of 124558 backedges. 11914 proven. 1953 refuted. 0 times theorem prover too weak. 110691 trivial. 0 not checked. [2021-11-20 06:41:35,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:41:53,437 INFO L134 CoverageAnalysis]: Checked inductivity of 124558 backedges. 11914 proven. 1953 refuted. 0 times theorem prover too weak. 110691 trivial. 0 not checked. [2021-11-20 06:41:53,438 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:41:53,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [925007520] [2021-11-20 06:41:53,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [925007520] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:41:53,438 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:41:53,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 130 [2021-11-20 06:41:53,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823548632] [2021-11-20 06:41:53,439 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:41:53,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2021-11-20 06:41:53,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:41:53,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2021-11-20 06:41:53,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4353, Invalid=12417, Unknown=0, NotChecked=0, Total=16770 [2021-11-20 06:41:53,448 INFO L87 Difference]: Start difference. First operand 1417 states and 1804 transitions. Second operand has 130 states, 130 states have (on average 1.2230769230769232) internal successors, (159), 130 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:46:06,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:46:06,653 INFO L93 Difference]: Finished difference Result 4426 states and 6098 transitions. [2021-11-20 06:46:06,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2021-11-20 06:46:06,654 INFO L78 Accepts]: Start accepts. Automaton has has 130 states, 130 states have (on average 1.2230769230769232) internal successors, (159), 130 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1039 [2021-11-20 06:46:06,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:46:06,671 INFO L225 Difference]: With dead ends: 4426 [2021-11-20 06:46:06,671 INFO L226 Difference]: Without dead ends: 3076 [2021-11-20 06:46:06,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2139 GetRequests, 1948 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6048 ImplicationChecksByTransitivity, 170.0s TimeCoverageRelationStatistics Valid=12543, Invalid=24513, Unknown=0, NotChecked=0, Total=37056 [2021-11-20 06:46:06,687 INFO L933 BasicCegarLoop]: 273 mSDtfsCounter, 29627 mSDsluCounter, 16642 mSDsCounter, 0 mSdLazyCounter, 24945 mSolverCounterSat, 9254 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 87.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29627 SdHoareTripleChecker+Valid, 16915 SdHoareTripleChecker+Invalid, 34199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 9254 IncrementalHoareTripleChecker+Valid, 24945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 99.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:46:06,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29627 Valid, 16915 Invalid, 34199 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [9254 Valid, 24945 Invalid, 0 Unknown, 0 Unchecked, 99.6s Time] [2021-11-20 06:46:06,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3076 states. [2021-11-20 06:46:06,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3076 to 2825. [2021-11-20 06:46:06,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2825 states, 2824 states have (on average 1.273371104815864) internal successors, (3596), 2824 states have internal predecessors, (3596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:46:06,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2825 states to 2825 states and 3596 transitions. [2021-11-20 06:46:06,955 INFO L78 Accepts]: Start accepts. Automaton has 2825 states and 3596 transitions. Word has length 1039 [2021-11-20 06:46:06,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:46:06,956 INFO L470 AbstractCegarLoop]: Abstraction has 2825 states and 3596 transitions. [2021-11-20 06:46:06,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 1.2230769230769232) internal successors, (159), 130 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:46:06,957 INFO L276 IsEmpty]: Start isEmpty. Operand 2825 states and 3596 transitions. [2021-11-20 06:46:07,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2064 [2021-11-20 06:46:07,008 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:46:07,009 INFO L514 BasicCegarLoop]: trace histogram [504, 504, 504, 503, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:46:07,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-20 06:46:07,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:46:07,224 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:46:07,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:46:07,225 INFO L85 PathProgramCache]: Analyzing trace with hash -624884481, now seen corresponding path program 3 times [2021-11-20 06:46:07,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:46:07,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [125264512] [2021-11-20 06:46:07,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:46:07,235 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:46:07,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:46:07,236 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:46:07,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_378792ad-a37e-4aef-81f0-182056933cb1/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process