./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem01_label08.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4fada5-c125-4853-92bb-c9cc3bc13b67/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4fada5-c125-4853-92bb-c9cc3bc13b67/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4fada5-c125-4853-92bb-c9cc3bc13b67/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4fada5-c125-4853-92bb-c9cc3bc13b67/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem01_label08.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4fada5-c125-4853-92bb-c9cc3bc13b67/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4fada5-c125-4853-92bb-c9cc3bc13b67/bin/utaipan-q2qaUkNPG8 --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1fca60a421a39fa5f3f8d3bde13bd29dacb18de8 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 08:11:44,161 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 08:11:44,164 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 08:11:44,204 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 08:11:44,205 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 08:11:44,206 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 08:11:44,208 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 08:11:44,211 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 08:11:44,213 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 08:11:44,215 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 08:11:44,216 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 08:11:44,218 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 08:11:44,218 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 08:11:44,220 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 08:11:44,222 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 08:11:44,224 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 08:11:44,225 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 08:11:44,226 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 08:11:44,229 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 08:11:44,232 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 08:11:44,234 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 08:11:44,236 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 08:11:44,237 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 08:11:44,239 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 08:11:44,243 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 08:11:44,244 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 08:11:44,245 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 08:11:44,252 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 08:11:44,253 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 08:11:44,254 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 08:11:44,254 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 08:11:44,255 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 08:11:44,256 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 08:11:44,257 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 08:11:44,258 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 08:11:44,259 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 08:11:44,260 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 08:11:44,260 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 08:11:44,260 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 08:11:44,262 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 08:11:44,263 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 08:11:44,268 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4fada5-c125-4853-92bb-c9cc3bc13b67/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-13 08:11:44,315 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 08:11:44,316 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 08:11:44,317 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 08:11:44,317 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 08:11:44,317 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 08:11:44,318 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 08:11:44,318 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 08:11:44,318 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 08:11:44,324 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 08:11:44,325 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 08:11:44,326 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 08:11:44,326 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 08:11:44,327 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 08:11:44,327 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 08:11:44,327 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 08:11:44,328 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 08:11:44,329 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 08:11:44,329 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 08:11:44,329 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 08:11:44,329 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 08:11:44,330 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 08:11:44,330 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 08:11:44,330 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 08:11:44,330 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 08:11:44,331 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 08:11:44,331 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 08:11:44,331 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 08:11:44,331 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 08:11:44,332 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 08:11:44,333 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 08:11:44,333 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 08:11:44,334 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 08:11:44,334 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 08:11:44,334 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 08:11:44,335 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 08:11:44,335 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 08:11:44,335 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 08:11:44,335 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 08:11:44,335 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 08:11:44,336 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_8e4fada5-c125-4853-92bb-c9cc3bc13b67/bin/utaipan-q2qaUkNPG8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4fada5-c125-4853-92bb-c9cc3bc13b67/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1fca60a421a39fa5f3f8d3bde13bd29dacb18de8 [2021-10-13 08:11:44,597 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 08:11:44,629 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 08:11:44,632 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 08:11:44,634 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 08:11:44,635 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 08:11:44,636 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4fada5-c125-4853-92bb-c9cc3bc13b67/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/eca-rers2012/Problem01_label08.c [2021-10-13 08:11:44,713 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4fada5-c125-4853-92bb-c9cc3bc13b67/bin/utaipan-q2qaUkNPG8/data/c8575cb0a/4be1373a98e84b66ba766ddf8a35f7bc/FLAG327a4cd42 [2021-10-13 08:11:45,379 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 08:11:45,380 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4fada5-c125-4853-92bb-c9cc3bc13b67/sv-benchmarks/c/eca-rers2012/Problem01_label08.c [2021-10-13 08:11:45,394 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4fada5-c125-4853-92bb-c9cc3bc13b67/bin/utaipan-q2qaUkNPG8/data/c8575cb0a/4be1373a98e84b66ba766ddf8a35f7bc/FLAG327a4cd42 [2021-10-13 08:11:45,645 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4fada5-c125-4853-92bb-c9cc3bc13b67/bin/utaipan-q2qaUkNPG8/data/c8575cb0a/4be1373a98e84b66ba766ddf8a35f7bc [2021-10-13 08:11:45,651 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 08:11:45,654 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 08:11:45,658 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 08:11:45,658 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 08:11:45,662 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 08:11:45,663 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:11:45" (1/1) ... [2021-10-13 08:11:45,666 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48bd14a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:45, skipping insertion in model container [2021-10-13 08:11:45,666 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:11:45" (1/1) ... [2021-10-13 08:11:45,673 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 08:11:45,737 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 08:11:46,108 WARN L228 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_8e4fada5-c125-4853-92bb-c9cc3bc13b67/sv-benchmarks/c/eca-rers2012/Problem01_label08.c[19599,19612] [2021-10-13 08:11:46,160 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 08:11:46,172 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 08:11:46,288 WARN L228 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_8e4fada5-c125-4853-92bb-c9cc3bc13b67/sv-benchmarks/c/eca-rers2012/Problem01_label08.c[19599,19612] [2021-10-13 08:11:46,297 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 08:11:46,316 INFO L208 MainTranslator]: Completed translation [2021-10-13 08:11:46,316 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:46 WrapperNode [2021-10-13 08:11:46,317 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 08:11:46,318 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 08:11:46,318 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 08:11:46,318 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 08:11:46,326 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:46" (1/1) ... [2021-10-13 08:11:46,351 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:46" (1/1) ... [2021-10-13 08:11:46,408 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 08:11:46,409 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 08:11:46,410 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 08:11:46,410 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 08:11:46,419 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:46" (1/1) ... [2021-10-13 08:11:46,419 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:46" (1/1) ... [2021-10-13 08:11:46,425 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:46" (1/1) ... [2021-10-13 08:11:46,425 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:46" (1/1) ... [2021-10-13 08:11:46,469 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:46" (1/1) ... [2021-10-13 08:11:46,479 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:46" (1/1) ... [2021-10-13 08:11:46,496 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:46" (1/1) ... [2021-10-13 08:11:46,519 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 08:11:46,521 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 08:11:46,523 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 08:11:46,523 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 08:11:46,524 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:46" (1/1) ... [2021-10-13 08:11:46,532 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 08:11:46,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4fada5-c125-4853-92bb-c9cc3bc13b67/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:11:46,557 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4fada5-c125-4853-92bb-c9cc3bc13b67/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 08:11:46,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4fada5-c125-4853-92bb-c9cc3bc13b67/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 08:11:46,636 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 08:11:46,637 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 08:11:46,637 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 08:11:46,637 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 08:11:48,592 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 08:11:48,593 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-13 08:11:48,596 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:11:48 BoogieIcfgContainer [2021-10-13 08:11:48,597 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 08:11:48,599 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 08:11:48,599 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 08:11:48,603 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 08:11:48,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:11:45" (1/3) ... [2021-10-13 08:11:48,605 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d4a321e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:11:48, skipping insertion in model container [2021-10-13 08:11:48,605 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:46" (2/3) ... [2021-10-13 08:11:48,606 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d4a321e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:11:48, skipping insertion in model container [2021-10-13 08:11:48,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:11:48" (3/3) ... [2021-10-13 08:11:48,608 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem01_label08.c [2021-10-13 08:11:48,614 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 08:11:48,615 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 08:11:48,687 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 08:11:48,697 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, mConcurrency=FINITE_AUTOMATA, 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 [2021-10-13 08:11:48,697 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 08:11:48,714 INFO L276 IsEmpty]: Start isEmpty. Operand has 76 states, 74 states have (on average 1.945945945945946) internal successors, (144), 75 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:11:48,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-10-13 08:11:48,724 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:11:48,725 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:11:48,726 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:11:48,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:11:48,732 INFO L82 PathProgramCache]: Analyzing trace with hash 379025287, now seen corresponding path program 1 times [2021-10-13 08:11:48,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:11:48,748 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082857726] [2021-10-13 08:11:48,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:11:48,756 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:11:48,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:11:49,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:11:49,224 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:11:49,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082857726] [2021-10-13 08:11:49,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082857726] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:11:49,226 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:11:49,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 08:11:49,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303949268] [2021-10-13 08:11:49,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 08:11:49,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:11:49,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 08:11:49,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:11:49,262 INFO L87 Difference]: Start difference. First operand has 76 states, 74 states have (on average 1.945945945945946) internal successors, (144), 75 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:11:49,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:11:49,745 INFO L93 Difference]: Finished difference Result 224 states and 428 transitions. [2021-10-13 08:11:49,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 08:11:49,747 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-10-13 08:11:49,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:11:49,765 INFO L225 Difference]: With dead ends: 224 [2021-10-13 08:11:49,765 INFO L226 Difference]: Without dead ends: 145 [2021-10-13 08:11:49,770 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:11:49,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-10-13 08:11:49,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-10-13 08:11:49,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.7986111111111112) internal successors, (259), 144 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:11:49,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 259 transitions. [2021-10-13 08:11:49,842 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 259 transitions. Word has length 71 [2021-10-13 08:11:49,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:11:49,843 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 259 transitions. [2021-10-13 08:11:49,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:11:49,844 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 259 transitions. [2021-10-13 08:11:49,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-10-13 08:11:49,850 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:11:49,850 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:11:49,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 08:11:49,851 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:11:49,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:11:49,854 INFO L82 PathProgramCache]: Analyzing trace with hash -615336422, now seen corresponding path program 1 times [2021-10-13 08:11:49,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:11:49,855 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594127481] [2021-10-13 08:11:49,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:11:49,855 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:11:49,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:11:49,944 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:11:49,945 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:11:49,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594127481] [2021-10-13 08:11:49,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594127481] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:11:49,947 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:11:49,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 08:11:49,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709107301] [2021-10-13 08:11:49,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 08:11:49,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:11:49,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 08:11:49,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:11:49,951 INFO L87 Difference]: Start difference. First operand 145 states and 259 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:11:50,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:11:50,324 INFO L93 Difference]: Finished difference Result 431 states and 774 transitions. [2021-10-13 08:11:50,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 08:11:50,325 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-10-13 08:11:50,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:11:50,328 INFO L225 Difference]: With dead ends: 431 [2021-10-13 08:11:50,328 INFO L226 Difference]: Without dead ends: 287 [2021-10-13 08:11:50,330 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:11:50,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-10-13 08:11:50,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2021-10-13 08:11:50,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 1.632867132867133) internal successors, (467), 286 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:11:50,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 467 transitions. [2021-10-13 08:11:50,348 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 467 transitions. Word has length 77 [2021-10-13 08:11:50,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:11:50,348 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 467 transitions. [2021-10-13 08:11:50,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:11:50,349 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 467 transitions. [2021-10-13 08:11:50,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-10-13 08:11:50,352 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:11:50,353 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:11:50,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 08:11:50,353 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:11:50,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:11:50,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1933825803, now seen corresponding path program 1 times [2021-10-13 08:11:50,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:11:50,355 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957695894] [2021-10-13 08:11:50,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:11:50,355 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:11:50,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:11:50,434 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-13 08:11:50,435 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:11:50,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957695894] [2021-10-13 08:11:50,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957695894] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:11:50,436 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:11:50,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 08:11:50,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008444112] [2021-10-13 08:11:50,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 08:11:50,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:11:50,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 08:11:50,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:11:50,439 INFO L87 Difference]: Start difference. First operand 287 states and 467 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:11:50,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:11:50,765 INFO L93 Difference]: Finished difference Result 715 states and 1184 transitions. [2021-10-13 08:11:50,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 08:11:50,765 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-10-13 08:11:50,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:11:50,768 INFO L225 Difference]: With dead ends: 715 [2021-10-13 08:11:50,769 INFO L226 Difference]: Without dead ends: 429 [2021-10-13 08:11:50,770 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:11:50,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-10-13 08:11:50,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 358. [2021-10-13 08:11:50,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 1.6442577030812324) internal successors, (587), 357 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:11:50,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 587 transitions. [2021-10-13 08:11:50,790 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 587 transitions. Word has length 105 [2021-10-13 08:11:50,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:11:50,791 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 587 transitions. [2021-10-13 08:11:50,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:11:50,791 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 587 transitions. [2021-10-13 08:11:50,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-10-13 08:11:50,795 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:11:50,795 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:11:50,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-13 08:11:50,795 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:11:50,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:11:50,796 INFO L82 PathProgramCache]: Analyzing trace with hash 218745791, now seen corresponding path program 1 times [2021-10-13 08:11:50,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:11:50,797 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403235977] [2021-10-13 08:11:50,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:11:50,797 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:11:50,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:11:50,884 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-10-13 08:11:50,884 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:11:50,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403235977] [2021-10-13 08:11:50,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403235977] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:11:50,885 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:11:50,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 08:11:50,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37919533] [2021-10-13 08:11:50,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 08:11:50,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:11:50,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 08:11:50,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:11:50,887 INFO L87 Difference]: Start difference. First operand 358 states and 587 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:11:51,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:11:51,198 INFO L93 Difference]: Finished difference Result 715 states and 1173 transitions. [2021-10-13 08:11:51,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 08:11:51,199 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2021-10-13 08:11:51,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:11:51,201 INFO L225 Difference]: With dead ends: 715 [2021-10-13 08:11:51,202 INFO L226 Difference]: Without dead ends: 358 [2021-10-13 08:11:51,203 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:11:51,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-10-13 08:11:51,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 358. [2021-10-13 08:11:51,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 1.6274509803921569) internal successors, (581), 357 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:11:51,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 581 transitions. [2021-10-13 08:11:51,217 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 581 transitions. Word has length 109 [2021-10-13 08:11:51,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:11:51,217 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 581 transitions. [2021-10-13 08:11:51,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:11:51,217 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 581 transitions. [2021-10-13 08:11:51,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-10-13 08:11:51,221 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:11:51,221 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:11:51,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-13 08:11:51,222 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:11:51,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:11:51,222 INFO L82 PathProgramCache]: Analyzing trace with hash 674879479, now seen corresponding path program 1 times [2021-10-13 08:11:51,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:11:51,223 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103291342] [2021-10-13 08:11:51,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:11:51,223 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:11:51,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:11:51,299 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-10-13 08:11:51,299 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:11:51,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103291342] [2021-10-13 08:11:51,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103291342] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:11:51,301 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:11:51,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 08:11:51,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070265764] [2021-10-13 08:11:51,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 08:11:51,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:11:51,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 08:11:51,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:11:51,304 INFO L87 Difference]: Start difference. First operand 358 states and 581 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:11:51,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:11:51,613 INFO L93 Difference]: Finished difference Result 857 states and 1369 transitions. [2021-10-13 08:11:51,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 08:11:51,613 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2021-10-13 08:11:51,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:11:51,617 INFO L225 Difference]: With dead ends: 857 [2021-10-13 08:11:51,617 INFO L226 Difference]: Without dead ends: 500 [2021-10-13 08:11:51,618 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:11:51,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-10-13 08:11:51,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 500. [2021-10-13 08:11:51,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 499 states have (on average 1.5210420841683367) internal successors, (759), 499 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:11:51,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 759 transitions. [2021-10-13 08:11:51,636 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 759 transitions. Word has length 113 [2021-10-13 08:11:51,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:11:51,636 INFO L470 AbstractCegarLoop]: Abstraction has 500 states and 759 transitions. [2021-10-13 08:11:51,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:11:51,637 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 759 transitions. [2021-10-13 08:11:51,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-10-13 08:11:51,639 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:11:51,639 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:11:51,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-13 08:11:51,640 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:11:51,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:11:51,641 INFO L82 PathProgramCache]: Analyzing trace with hash -692381771, now seen corresponding path program 1 times [2021-10-13 08:11:51,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:11:51,641 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946699610] [2021-10-13 08:11:51,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:11:51,642 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:11:51,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:11:51,687 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-10-13 08:11:51,687 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:11:51,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946699610] [2021-10-13 08:11:51,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946699610] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:11:51,688 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:11:51,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 08:11:51,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468471451] [2021-10-13 08:11:51,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 08:11:51,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:11:51,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 08:11:51,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:11:51,691 INFO L87 Difference]: Start difference. First operand 500 states and 759 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:11:52,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:11:52,049 INFO L93 Difference]: Finished difference Result 1354 states and 2016 transitions. [2021-10-13 08:11:52,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 08:11:52,050 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 122 [2021-10-13 08:11:52,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:11:52,055 INFO L225 Difference]: With dead ends: 1354 [2021-10-13 08:11:52,055 INFO L226 Difference]: Without dead ends: 855 [2021-10-13 08:11:52,056 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:11:52,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2021-10-13 08:11:52,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 642. [2021-10-13 08:11:52,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 642 states, 641 states have (on average 1.4804992199687987) internal successors, (949), 641 states have internal predecessors, (949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:11:52,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 949 transitions. [2021-10-13 08:11:52,101 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 949 transitions. Word has length 122 [2021-10-13 08:11:52,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:11:52,101 INFO L470 AbstractCegarLoop]: Abstraction has 642 states and 949 transitions. [2021-10-13 08:11:52,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:11:52,102 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 949 transitions. [2021-10-13 08:11:52,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-10-13 08:11:52,108 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:11:52,108 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:11:52,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-13 08:11:52,109 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:11:52,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:11:52,109 INFO L82 PathProgramCache]: Analyzing trace with hash 240374715, now seen corresponding path program 1 times [2021-10-13 08:11:52,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:11:52,114 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206887810] [2021-10-13 08:11:52,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:11:52,115 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:11:52,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:11:52,205 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-10-13 08:11:52,205 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:11:52,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206887810] [2021-10-13 08:11:52,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206887810] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:11:52,206 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:11:52,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 08:11:52,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42220703] [2021-10-13 08:11:52,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 08:11:52,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:11:52,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 08:11:52,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:11:52,208 INFO L87 Difference]: Start difference. First operand 642 states and 949 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:11:52,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:11:52,501 INFO L93 Difference]: Finished difference Result 1354 states and 2010 transitions. [2021-10-13 08:11:52,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 08:11:52,502 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 138 [2021-10-13 08:11:52,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:11:52,509 INFO L225 Difference]: With dead ends: 1354 [2021-10-13 08:11:52,509 INFO L226 Difference]: Without dead ends: 713 [2021-10-13 08:11:52,510 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:11:52,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2021-10-13 08:11:52,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 713. [2021-10-13 08:11:52,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 712 states have (on average 1.4578651685393258) internal successors, (1038), 712 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:11:52,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 1038 transitions. [2021-10-13 08:11:52,536 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 1038 transitions. Word has length 138 [2021-10-13 08:11:52,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:11:52,537 INFO L470 AbstractCegarLoop]: Abstraction has 713 states and 1038 transitions. [2021-10-13 08:11:52,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:11:52,538 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 1038 transitions. [2021-10-13 08:11:52,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-10-13 08:11:52,541 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:11:52,542 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:11:52,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-13 08:11:52,543 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:11:52,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:11:52,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1229085797, now seen corresponding path program 1 times [2021-10-13 08:11:52,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:11:52,544 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604963330] [2021-10-13 08:11:52,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:11:52,545 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:11:52,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:11:52,654 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-10-13 08:11:52,655 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:11:52,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604963330] [2021-10-13 08:11:52,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604963330] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:11:52,656 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:11:52,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 08:11:52,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975542934] [2021-10-13 08:11:52,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 08:11:52,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:11:52,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 08:11:52,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 08:11:52,658 INFO L87 Difference]: Start difference. First operand 713 states and 1038 transitions. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:11:53,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:11:53,189 INFO L93 Difference]: Finished difference Result 1780 states and 2557 transitions. [2021-10-13 08:11:53,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 08:11:53,190 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 154 [2021-10-13 08:11:53,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:11:53,198 INFO L225 Difference]: With dead ends: 1780 [2021-10-13 08:11:53,198 INFO L226 Difference]: Without dead ends: 997 [2021-10-13 08:11:53,199 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 08:11:53,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2021-10-13 08:11:53,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 997. [2021-10-13 08:11:53,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 997 states, 996 states have (on average 1.2359437751004017) internal successors, (1231), 996 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:11:53,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 1231 transitions. [2021-10-13 08:11:53,234 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 1231 transitions. Word has length 154 [2021-10-13 08:11:53,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:11:53,234 INFO L470 AbstractCegarLoop]: Abstraction has 997 states and 1231 transitions. [2021-10-13 08:11:53,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:11:53,235 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 1231 transitions. [2021-10-13 08:11:53,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-10-13 08:11:53,239 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:11:53,239 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:11:53,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-13 08:11:53,239 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:11:53,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:11:53,241 INFO L82 PathProgramCache]: Analyzing trace with hash -2145598008, now seen corresponding path program 1 times [2021-10-13 08:11:53,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:11:53,241 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868078377] [2021-10-13 08:11:53,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:11:53,242 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:11:53,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:11:53,364 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-10-13 08:11:53,365 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:11:53,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868078377] [2021-10-13 08:11:53,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868078377] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:11:53,366 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:11:53,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 08:11:53,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107808980] [2021-10-13 08:11:53,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 08:11:53,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:11:53,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 08:11:53,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 08:11:53,374 INFO L87 Difference]: Start difference. First operand 997 states and 1231 transitions. Second operand has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:11:53,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:11:53,839 INFO L93 Difference]: Finished difference Result 2206 states and 2715 transitions. [2021-10-13 08:11:53,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 08:11:53,840 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 171 [2021-10-13 08:11:53,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:11:53,850 INFO L225 Difference]: With dead ends: 2206 [2021-10-13 08:11:53,850 INFO L226 Difference]: Without dead ends: 1210 [2021-10-13 08:11:53,851 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 08:11:53,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2021-10-13 08:11:53,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 997. [2021-10-13 08:11:53,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 997 states, 996 states have (on average 1.1927710843373494) internal successors, (1188), 996 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:11:53,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 1188 transitions. [2021-10-13 08:11:53,882 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 1188 transitions. Word has length 171 [2021-10-13 08:11:53,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:11:53,882 INFO L470 AbstractCegarLoop]: Abstraction has 997 states and 1188 transitions. [2021-10-13 08:11:53,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:11:53,883 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 1188 transitions. [2021-10-13 08:11:53,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-10-13 08:11:53,887 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:11:53,887 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:11:53,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-13 08:11:53,888 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:11:53,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:11:53,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1532628297, now seen corresponding path program 1 times [2021-10-13 08:11:53,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:11:53,889 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986954268] [2021-10-13 08:11:53,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:11:53,889 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:11:53,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:11:54,167 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 63 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:11:54,167 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:11:54,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986954268] [2021-10-13 08:11:54,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986954268] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 08:11:54,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069702857] [2021-10-13 08:11:54,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:11:54,169 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:11:54,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4fada5-c125-4853-92bb-c9cc3bc13b67/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:11:54,180 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4fada5-c125-4853-92bb-c9cc3bc13b67/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:11:54,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4fada5-c125-4853-92bb-c9cc3bc13b67/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 08:11:54,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:11:54,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 08:11:54,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:11:54,954 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-10-13 08:11:54,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:11:55,487 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-10-13 08:11:55,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069702857] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:11:55,487 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-13 08:11:55,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5] total 6 [2021-10-13 08:11:55,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985544552] [2021-10-13 08:11:55,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 08:11:55,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:11:55,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 08:11:55,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-13 08:11:55,490 INFO L87 Difference]: Start difference. First operand 997 states and 1188 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:11:55,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:11:55,762 INFO L93 Difference]: Finished difference Result 1709 states and 2015 transitions. [2021-10-13 08:11:55,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 08:11:55,762 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-10-13 08:11:55,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:11:55,773 INFO L225 Difference]: With dead ends: 1709 [2021-10-13 08:11:55,773 INFO L226 Difference]: Without dead ends: 1707 [2021-10-13 08:11:55,774 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 347 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 43.4ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-13 08:11:55,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1707 states. [2021-10-13 08:11:55,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1707 to 1565. [2021-10-13 08:11:55,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1565 states, 1564 states have (on average 1.1796675191815857) internal successors, (1845), 1564 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:11:55,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1565 states to 1565 states and 1845 transitions. [2021-10-13 08:11:55,819 INFO L78 Accepts]: Start accepts. Automaton has 1565 states and 1845 transitions. Word has length 175 [2021-10-13 08:11:55,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:11:55,820 INFO L470 AbstractCegarLoop]: Abstraction has 1565 states and 1845 transitions. [2021-10-13 08:11:55,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:11:55,821 INFO L276 IsEmpty]: Start isEmpty. Operand 1565 states and 1845 transitions. [2021-10-13 08:11:55,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-10-13 08:11:55,826 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:11:55,826 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:11:55,861 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4fada5-c125-4853-92bb-c9cc3bc13b67/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 08:11:56,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4fada5-c125-4853-92bb-c9cc3bc13b67/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-13 08:11:56,040 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:11:56,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:11:56,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1287881272, now seen corresponding path program 1 times [2021-10-13 08:11:56,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:11:56,041 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219627127] [2021-10-13 08:11:56,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:11:56,041 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:11:56,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:11:56,101 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2021-10-13 08:11:56,102 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:11:56,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219627127] [2021-10-13 08:11:56,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219627127] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:11:56,102 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:11:56,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 08:11:56,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122284225] [2021-10-13 08:11:56,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 08:11:56,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:11:56,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 08:11:56,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 08:11:56,105 INFO L87 Difference]: Start difference. First operand 1565 states and 1845 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:11:56,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:11:56,519 INFO L93 Difference]: Finished difference Result 3200 states and 3779 transitions. [2021-10-13 08:11:56,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 08:11:56,520 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 202 [2021-10-13 08:11:56,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:11:56,530 INFO L225 Difference]: With dead ends: 3200 [2021-10-13 08:11:56,530 INFO L226 Difference]: Without dead ends: 1636 [2021-10-13 08:11:56,535 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 08:11:56,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1636 states. [2021-10-13 08:11:56,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1636 to 1636. [2021-10-13 08:11:56,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1636 states, 1635 states have (on average 1.164525993883792) internal successors, (1904), 1635 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:11:56,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1636 states to 1636 states and 1904 transitions. [2021-10-13 08:11:56,583 INFO L78 Accepts]: Start accepts. Automaton has 1636 states and 1904 transitions. Word has length 202 [2021-10-13 08:11:56,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:11:56,584 INFO L470 AbstractCegarLoop]: Abstraction has 1636 states and 1904 transitions. [2021-10-13 08:11:56,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:11:56,584 INFO L276 IsEmpty]: Start isEmpty. Operand 1636 states and 1904 transitions. [2021-10-13 08:11:56,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2021-10-13 08:11:56,590 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:11:56,591 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:11:56,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-13 08:11:56,591 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:11:56,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:11:56,592 INFO L82 PathProgramCache]: Analyzing trace with hash 1529632152, now seen corresponding path program 1 times [2021-10-13 08:11:56,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:11:56,594 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715723848] [2021-10-13 08:11:56,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:11:56,595 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:11:56,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:11:56,715 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 219 proven. 0 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-10-13 08:11:56,716 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:11:56,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715723848] [2021-10-13 08:11:56,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715723848] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:11:56,716 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:11:56,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 08:11:56,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951957132] [2021-10-13 08:11:56,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 08:11:56,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:11:56,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 08:11:56,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:11:56,718 INFO L87 Difference]: Start difference. First operand 1636 states and 1904 transitions. Second operand has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:11:57,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:11:57,006 INFO L93 Difference]: Finished difference Result 3555 states and 4140 transitions. [2021-10-13 08:11:57,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 08:11:57,007 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 233 [2021-10-13 08:11:57,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:11:57,017 INFO L225 Difference]: With dead ends: 3555 [2021-10-13 08:11:57,017 INFO L226 Difference]: Without dead ends: 1920 [2021-10-13 08:11:57,019 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:11:57,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1920 states. [2021-10-13 08:11:57,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1920 to 1849. [2021-10-13 08:11:57,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1849 states, 1848 states have (on average 1.146103896103896) internal successors, (2118), 1848 states have internal predecessors, (2118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:11:57,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1849 states to 1849 states and 2118 transitions. [2021-10-13 08:11:57,068 INFO L78 Accepts]: Start accepts. Automaton has 1849 states and 2118 transitions. Word has length 233 [2021-10-13 08:11:57,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:11:57,069 INFO L470 AbstractCegarLoop]: Abstraction has 1849 states and 2118 transitions. [2021-10-13 08:11:57,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:11:57,069 INFO L276 IsEmpty]: Start isEmpty. Operand 1849 states and 2118 transitions. [2021-10-13 08:11:57,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2021-10-13 08:11:57,076 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:11:57,076 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:11:57,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-13 08:11:57,077 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:11:57,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:11:57,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1886815535, now seen corresponding path program 1 times [2021-10-13 08:11:57,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:11:57,078 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134106590] [2021-10-13 08:11:57,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:11:57,079 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:11:57,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:11:57,331 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 182 proven. 103 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-10-13 08:11:57,331 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:11:57,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134106590] [2021-10-13 08:11:57,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134106590] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 08:11:57,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308536128] [2021-10-13 08:11:57,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:11:57,352 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:11:57,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4fada5-c125-4853-92bb-c9cc3bc13b67/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:11:57,353 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4fada5-c125-4853-92bb-c9cc3bc13b67/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:11:57,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4fada5-c125-4853-92bb-c9cc3bc13b67/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-13 08:11:57,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:11:57,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 08:11:57,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:11:58,268 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 183 proven. 0 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2021-10-13 08:11:58,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:11:58,857 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 183 proven. 0 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2021-10-13 08:11:58,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308536128] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:11:58,858 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-13 08:11:58,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2021-10-13 08:11:58,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075515263] [2021-10-13 08:11:58,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 08:11:58,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:11:58,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 08:11:58,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-13 08:11:58,862 INFO L87 Difference]: Start difference. First operand 1849 states and 2118 transitions. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:11:59,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:11:59,148 INFO L93 Difference]: Finished difference Result 2135 states and 2428 transitions. [2021-10-13 08:11:59,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 08:11:59,149 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 255 [2021-10-13 08:11:59,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:11:59,160 INFO L225 Difference]: With dead ends: 2135 [2021-10-13 08:11:59,160 INFO L226 Difference]: Without dead ends: 2133 [2021-10-13 08:11:59,161 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 508 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 34.5ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-13 08:11:59,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2133 states. [2021-10-13 08:11:59,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2133 to 1778. [2021-10-13 08:11:59,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1778 states, 1777 states have (on average 1.1418120427687113) internal successors, (2029), 1777 states have internal predecessors, (2029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:11:59,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1778 states to 1778 states and 2029 transitions. [2021-10-13 08:11:59,221 INFO L78 Accepts]: Start accepts. Automaton has 1778 states and 2029 transitions. Word has length 255 [2021-10-13 08:11:59,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:11:59,222 INFO L470 AbstractCegarLoop]: Abstraction has 1778 states and 2029 transitions. [2021-10-13 08:11:59,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:11:59,222 INFO L276 IsEmpty]: Start isEmpty. Operand 1778 states and 2029 transitions. [2021-10-13 08:11:59,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2021-10-13 08:11:59,230 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:11:59,230 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:11:59,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4fada5-c125-4853-92bb-c9cc3bc13b67/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-13 08:11:59,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4fada5-c125-4853-92bb-c9cc3bc13b67/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-13 08:11:59,444 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:11:59,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:11:59,445 INFO L82 PathProgramCache]: Analyzing trace with hash -791200203, now seen corresponding path program 1 times [2021-10-13 08:11:59,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:11:59,445 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082511292] [2021-10-13 08:11:59,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:11:59,445 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:11:59,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:11:59,582 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 366 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-10-13 08:11:59,583 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:11:59,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082511292] [2021-10-13 08:11:59,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082511292] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:11:59,583 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:11:59,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 08:11:59,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274802078] [2021-10-13 08:11:59,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 08:11:59,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:11:59,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 08:11:59,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:11:59,587 INFO L87 Difference]: Start difference. First operand 1778 states and 2029 transitions. Second operand has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:11:59,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:11:59,851 INFO L93 Difference]: Finished difference Result 3056 states and 3513 transitions. [2021-10-13 08:11:59,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 08:11:59,852 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 267 [2021-10-13 08:11:59,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:11:59,853 INFO L225 Difference]: With dead ends: 3056 [2021-10-13 08:11:59,853 INFO L226 Difference]: Without dead ends: 0 [2021-10-13 08:11:59,856 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:11:59,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-13 08:11:59,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-13 08:11:59,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:11:59,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-13 08:11:59,857 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 267 [2021-10-13 08:11:59,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:11:59,857 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-13 08:11:59,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:11:59,858 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-13 08:11:59,858 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-13 08:11:59,860 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 08:11:59,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-13 08:11:59,863 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-13 08:11:59,868 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 08:11:59,898 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 08:11:59,899 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 08:12:00,283 INFO L857 garLoopResultBuilder]: For program point L102(lines 102 400) no Hoare annotation was computed. [2021-10-13 08:12:00,283 INFO L857 garLoopResultBuilder]: For program point L598(line 598) no Hoare annotation was computed. [2021-10-13 08:12:00,283 INFO L857 garLoopResultBuilder]: For program point L334(lines 334 400) no Hoare annotation was computed. [2021-10-13 08:12:00,284 INFO L857 garLoopResultBuilder]: For program point L302(lines 302 400) no Hoare annotation was computed. [2021-10-13 08:12:00,284 INFO L857 garLoopResultBuilder]: For program point L170(lines 170 400) no Hoare annotation was computed. [2021-10-13 08:12:00,284 INFO L857 garLoopResultBuilder]: For program point L204(lines 204 400) no Hoare annotation was computed. [2021-10-13 08:12:00,284 INFO L857 garLoopResultBuilder]: For program point L72(lines 72 400) no Hoare annotation was computed. [2021-10-13 08:12:00,284 INFO L857 garLoopResultBuilder]: For program point L271(lines 271 400) no Hoare annotation was computed. [2021-10-13 08:12:00,284 INFO L857 garLoopResultBuilder]: For program point L139(lines 139 400) no Hoare annotation was computed. [2021-10-13 08:12:00,284 INFO L857 garLoopResultBuilder]: For program point L371(lines 371 400) no Hoare annotation was computed. [2021-10-13 08:12:00,284 INFO L857 garLoopResultBuilder]: For program point L107(lines 107 400) no Hoare annotation was computed. [2021-10-13 08:12:00,284 INFO L857 garLoopResultBuilder]: For program point L41(lines 41 400) no Hoare annotation was computed. [2021-10-13 08:12:00,284 INFO L857 garLoopResultBuilder]: For program point L339(lines 339 400) no Hoare annotation was computed. [2021-10-13 08:12:00,285 INFO L857 garLoopResultBuilder]: For program point L207(lines 207 400) no Hoare annotation was computed. [2021-10-13 08:12:00,285 INFO L857 garLoopResultBuilder]: For program point L75(lines 75 400) no Hoare annotation was computed. [2021-10-13 08:12:00,285 INFO L857 garLoopResultBuilder]: For program point L373(lines 373 400) no Hoare annotation was computed. [2021-10-13 08:12:00,285 INFO L857 garLoopResultBuilder]: For program point L241(lines 241 400) no Hoare annotation was computed. [2021-10-13 08:12:00,285 INFO L857 garLoopResultBuilder]: For program point L175(lines 175 400) no Hoare annotation was computed. [2021-10-13 08:12:00,285 INFO L857 garLoopResultBuilder]: For program point L275(lines 275 400) no Hoare annotation was computed. [2021-10-13 08:12:00,285 INFO L857 garLoopResultBuilder]: For program point L375(lines 375 400) no Hoare annotation was computed. [2021-10-13 08:12:00,285 INFO L857 garLoopResultBuilder]: For program point L309(lines 309 400) no Hoare annotation was computed. [2021-10-13 08:12:00,285 INFO L857 garLoopResultBuilder]: For program point L45(lines 45 400) no Hoare annotation was computed. [2021-10-13 08:12:00,285 INFO L857 garLoopResultBuilder]: For program point L343(lines 343 400) no Hoare annotation was computed. [2021-10-13 08:12:00,286 INFO L857 garLoopResultBuilder]: For program point L112(lines 112 400) no Hoare annotation was computed. [2021-10-13 08:12:00,286 INFO L857 garLoopResultBuilder]: For program point L278(lines 278 400) no Hoare annotation was computed. [2021-10-13 08:12:00,286 INFO L857 garLoopResultBuilder]: For program point L146(lines 146 400) no Hoare annotation was computed. [2021-10-13 08:12:00,286 INFO L857 garLoopResultBuilder]: For program point L213(lines 213 400) no Hoare annotation was computed. [2021-10-13 08:12:00,286 INFO L857 garLoopResultBuilder]: For program point L82(lines 82 400) no Hoare annotation was computed. [2021-10-13 08:12:00,286 INFO L857 garLoopResultBuilder]: For program point L347(lines 347 400) no Hoare annotation was computed. [2021-10-13 08:12:00,286 INFO L857 garLoopResultBuilder]: For program point L248(lines 248 400) no Hoare annotation was computed. [2021-10-13 08:12:00,286 INFO L857 garLoopResultBuilder]: For program point L183(lines 183 400) no Hoare annotation was computed. [2021-10-13 08:12:00,286 INFO L857 garLoopResultBuilder]: For program point L150(lines 150 400) no Hoare annotation was computed. [2021-10-13 08:12:00,286 INFO L857 garLoopResultBuilder]: For program point L382(lines 382 400) no Hoare annotation was computed. [2021-10-13 08:12:00,287 INFO L857 garLoopResultBuilder]: For program point L316(lines 316 400) no Hoare annotation was computed. [2021-10-13 08:12:00,287 INFO L857 garLoopResultBuilder]: For program point L283(lines 283 400) no Hoare annotation was computed. [2021-10-13 08:12:00,287 INFO L857 garLoopResultBuilder]: For program point L118(lines 118 400) no Hoare annotation was computed. [2021-10-13 08:12:00,287 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-13 08:12:00,287 INFO L857 garLoopResultBuilder]: For program point L218(lines 218 400) no Hoare annotation was computed. [2021-10-13 08:12:00,287 INFO L857 garLoopResultBuilder]: For program point L53(lines 53 400) no Hoare annotation was computed. [2021-10-13 08:12:00,287 INFO L857 garLoopResultBuilder]: For program point L154(lines 154 400) no Hoare annotation was computed. [2021-10-13 08:12:00,287 INFO L853 garLoopResultBuilder]: At program point L584(lines 40 585) the Hoare annotation is: (let ((.cse3 (= ~a7~0 1)) (.cse4 (<= ~a16~0 5)) (.cse7 (<= ~a16~0 4)) (.cse6 (= ~a17~0 1)) (.cse0 (<= ~a7~0 0)) (.cse2 (<= 14 ~a8~0)) (.cse1 (= ~a21~0 1)) (.cse5 (= ~a20~0 1))) (or (and .cse0 .cse1 (<= 15 ~a8~0)) (and .cse2 .cse1 .cse3 .cse4) (and .cse3 .cse5) (and .cse0 .cse2 .cse1 .cse4) (and .cse6 .cse3 .cse4) (and .cse0 .cse1 .cse7) (and .cse1 .cse6 .cse7 .cse5) (and .cse0 .cse1 .cse6 .cse5) (and .cse0 .cse2 .cse1 .cse5))) [2021-10-13 08:12:00,288 INFO L857 garLoopResultBuilder]: For program point L188(lines 188 400) no Hoare annotation was computed. [2021-10-13 08:12:00,288 INFO L857 garLoopResultBuilder]: For program point L387(lines 387 400) no Hoare annotation was computed. [2021-10-13 08:12:00,288 INFO L857 garLoopResultBuilder]: For program point L288(lines 288 400) no Hoare annotation was computed. [2021-10-13 08:12:00,288 INFO L857 garLoopResultBuilder]: For program point L255(lines 255 400) no Hoare annotation was computed. [2021-10-13 08:12:00,288 INFO L857 garLoopResultBuilder]: For program point L90(lines 90 400) no Hoare annotation was computed. [2021-10-13 08:12:00,288 INFO L857 garLoopResultBuilder]: For program point L355(lines 355 400) no Hoare annotation was computed. [2021-10-13 08:12:00,288 INFO L857 garLoopResultBuilder]: For program point L322(lines 322 400) no Hoare annotation was computed. [2021-10-13 08:12:00,288 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-13 08:12:00,288 INFO L857 garLoopResultBuilder]: For program point L124(lines 124 400) no Hoare annotation was computed. [2021-10-13 08:12:00,288 INFO L860 garLoopResultBuilder]: At program point L587(lines 587 604) the Hoare annotation is: true [2021-10-13 08:12:00,289 INFO L857 garLoopResultBuilder]: For program point L521-1(lines 40 585) no Hoare annotation was computed. [2021-10-13 08:12:00,289 INFO L857 garLoopResultBuilder]: For program point L224(lines 224 400) no Hoare annotation was computed. [2021-10-13 08:12:00,289 INFO L857 garLoopResultBuilder]: For program point L158(lines 158 400) no Hoare annotation was computed. [2021-10-13 08:12:00,289 INFO L857 garLoopResultBuilder]: For program point L59(lines 59 400) no Hoare annotation was computed. [2021-10-13 08:12:00,289 INFO L857 garLoopResultBuilder]: For program point L94(lines 94 400) no Hoare annotation was computed. [2021-10-13 08:12:00,289 INFO L857 garLoopResultBuilder]: For program point L524-1(lines 40 585) no Hoare annotation was computed. [2021-10-13 08:12:00,289 INFO L857 garLoopResultBuilder]: For program point L392(lines 392 400) no Hoare annotation was computed. [2021-10-13 08:12:00,289 INFO L857 garLoopResultBuilder]: For program point L326(lines 326 400) no Hoare annotation was computed. [2021-10-13 08:12:00,289 INFO L857 garLoopResultBuilder]: For program point L260(lines 260 400) no Hoare annotation was computed. [2021-10-13 08:12:00,289 INFO L857 garLoopResultBuilder]: For program point L525(line 525) no Hoare annotation was computed. [2021-10-13 08:12:00,290 INFO L857 garLoopResultBuilder]: For program point L228(lines 228 400) no Hoare annotation was computed. [2021-10-13 08:12:00,290 INFO L857 garLoopResultBuilder]: For program point L162(lines 162 400) no Hoare annotation was computed. [2021-10-13 08:12:00,290 INFO L857 garLoopResultBuilder]: For program point L129(lines 129 400) no Hoare annotation was computed. [2021-10-13 08:12:00,290 INFO L857 garLoopResultBuilder]: For program point L328(lines 328 400) no Hoare annotation was computed. [2021-10-13 08:12:00,290 INFO L857 garLoopResultBuilder]: For program point L196(lines 196 400) no Hoare annotation was computed. [2021-10-13 08:12:00,290 INFO L857 garLoopResultBuilder]: For program point L64(lines 64 400) no Hoare annotation was computed. [2021-10-13 08:12:00,290 INFO L853 garLoopResultBuilder]: At program point L593-2(lines 593 603) the Hoare annotation is: (let ((.cse3 (= ~a7~0 1)) (.cse4 (<= ~a16~0 5)) (.cse7 (<= ~a16~0 4)) (.cse6 (= ~a17~0 1)) (.cse0 (<= ~a7~0 0)) (.cse2 (<= 14 ~a8~0)) (.cse1 (= ~a21~0 1)) (.cse5 (= ~a20~0 1))) (or (and .cse0 .cse1 (<= 15 ~a8~0)) (and .cse2 .cse1 .cse3 .cse4) (and .cse3 .cse5) (and .cse0 .cse2 .cse1 .cse4) (and .cse6 .cse3 .cse4) (and .cse0 .cse1 .cse7) (and .cse1 .cse6 .cse7 .cse5) (and .cse0 .cse1 .cse6 .cse5) (and .cse0 .cse2 .cse1 .cse5))) [2021-10-13 08:12:00,290 INFO L857 garLoopResultBuilder]: For program point L296(lines 296 400) no Hoare annotation was computed. [2021-10-13 08:12:00,290 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 525) no Hoare annotation was computed. [2021-10-13 08:12:00,291 INFO L857 garLoopResultBuilder]: For program point L363(lines 363 400) no Hoare annotation was computed. [2021-10-13 08:12:00,291 INFO L857 garLoopResultBuilder]: For program point L199(lines 199 400) no Hoare annotation was computed. [2021-10-13 08:12:00,291 INFO L857 garLoopResultBuilder]: For program point L365(lines 365 400) no Hoare annotation was computed. [2021-10-13 08:12:00,291 INFO L857 garLoopResultBuilder]: For program point L266(lines 266 400) no Hoare annotation was computed. [2021-10-13 08:12:00,291 INFO L857 garLoopResultBuilder]: For program point L233(lines 233 400) no Hoare annotation was computed. [2021-10-13 08:12:00,291 INFO L857 garLoopResultBuilder]: For program point L134(lines 134 400) no Hoare annotation was computed. [2021-10-13 08:12:00,301 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 08:12:00,335 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 08:12:00 BoogieIcfgContainer [2021-10-13 08:12:00,337 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 08:12:00,337 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 08:12:00,337 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 08:12:00,338 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 08:12:00,338 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:11:48" (3/4) ... [2021-10-13 08:12:00,341 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-13 08:12:00,370 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 108 nodes and edges [2021-10-13 08:12:00,371 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 20 nodes and edges [2021-10-13 08:12:00,373 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2021-10-13 08:12:00,375 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-13 08:12:00,518 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4fada5-c125-4853-92bb-c9cc3bc13b67/bin/utaipan-q2qaUkNPG8/witness.graphml [2021-10-13 08:12:00,518 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 08:12:00,520 INFO L168 Benchmark]: Toolchain (without parser) took 14864.95 ms. Allocated memory was 102.8 MB in the beginning and 249.6 MB in the end (delta: 146.8 MB). Free memory was 66.6 MB in the beginning and 74.1 MB in the end (delta: -7.4 MB). Peak memory consumption was 138.0 MB. Max. memory is 16.1 GB. [2021-10-13 08:12:00,520 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 102.8 MB. Free memory is still 55.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 08:12:00,521 INFO L168 Benchmark]: CACSL2BoogieTranslator took 659.26 ms. Allocated memory is still 102.8 MB. Free memory was 66.5 MB in the beginning and 60.7 MB in the end (delta: 5.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 08:12:00,521 INFO L168 Benchmark]: Boogie Procedure Inliner took 90.74 ms. Allocated memory is still 102.8 MB. Free memory was 60.7 MB in the beginning and 54.9 MB in the end (delta: 5.8 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-13 08:12:00,522 INFO L168 Benchmark]: Boogie Preprocessor took 110.10 ms. Allocated memory was 102.8 MB in the beginning and 123.7 MB in the end (delta: 21.0 MB). Free memory was 54.9 MB in the beginning and 96.0 MB in the end (delta: -41.1 MB). Peak memory consumption was 11.4 MB. Max. memory is 16.1 GB. [2021-10-13 08:12:00,522 INFO L168 Benchmark]: RCFGBuilder took 2076.21 ms. Allocated memory is still 123.7 MB. Free memory was 96.0 MB in the beginning and 53.4 MB in the end (delta: 42.6 MB). Peak memory consumption was 58.7 MB. Max. memory is 16.1 GB. [2021-10-13 08:12:00,523 INFO L168 Benchmark]: TraceAbstraction took 11737.99 ms. Allocated memory was 123.7 MB in the beginning and 249.6 MB in the end (delta: 125.8 MB). Free memory was 52.4 MB in the beginning and 88.7 MB in the end (delta: -36.3 MB). Peak memory consumption was 91.4 MB. Max. memory is 16.1 GB. [2021-10-13 08:12:00,523 INFO L168 Benchmark]: Witness Printer took 180.81 ms. Allocated memory is still 249.6 MB. Free memory was 88.7 MB in the beginning and 74.1 MB in the end (delta: 14.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-13 08:12:00,525 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 102.8 MB. Free memory is still 55.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 659.26 ms. Allocated memory is still 102.8 MB. Free memory was 66.5 MB in the beginning and 60.7 MB in the end (delta: 5.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 90.74 ms. Allocated memory is still 102.8 MB. Free memory was 60.7 MB in the beginning and 54.9 MB in the end (delta: 5.8 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 110.10 ms. Allocated memory was 102.8 MB in the beginning and 123.7 MB in the end (delta: 21.0 MB). Free memory was 54.9 MB in the beginning and 96.0 MB in the end (delta: -41.1 MB). Peak memory consumption was 11.4 MB. Max. memory is 16.1 GB. * RCFGBuilder took 2076.21 ms. Allocated memory is still 123.7 MB. Free memory was 96.0 MB in the beginning and 53.4 MB in the end (delta: 42.6 MB). Peak memory consumption was 58.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 11737.99 ms. Allocated memory was 123.7 MB in the beginning and 249.6 MB in the end (delta: 125.8 MB). Free memory was 52.4 MB in the beginning and 88.7 MB in the end (delta: -36.3 MB). Peak memory consumption was 91.4 MB. Max. memory is 16.1 GB. * Witness Printer took 180.81 ms. Allocated memory is still 249.6 MB. Free memory was 88.7 MB in the beginning and 74.1 MB in the end (delta: 14.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 525]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 76 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 11615.2ms, OverallIterations: 14, TraceHistogramMax: 7, EmptinessCheckTime: 75.5ms, AutomataDifference: 5156.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 421.4ms, InitialAbstractionConstructionTime: 12.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 586 SDtfs, 991 SDslu, 62 SDs, 0 SdLazy, 3200 SolverSat, 803 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3521.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 897 GetRequests, 871 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 125.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1849occurred in iteration=12, InterpolantAutomatonStates: 45, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 462.6ms AutomataMinimizationTime, 14 MinimizatonAttempts, 1065 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 43 NumberOfFragments, 207 HoareAnnotationTreeSize, 3 FomulaSimplifications, 2878 FormulaSimplificationTreeSizeReduction, 58.3ms HoareSimplificationTime, 3 FomulaSimplificationsInter, 182 FormulaSimplificationTreeSizeReductionInter, 355.3ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 203.5ms SsaConstructionTime, 636.8ms SatisfiabilityAnalysisTime, 3654.1ms InterpolantComputationTime, 2622 NumberOfCodeBlocks, 2622 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 3034 ConstructedInterpolants, 0 QuantifiedInterpolants, 10441 SizeOfPredicates, 0 NumberOfNonLiveVariables, 887 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 18 InterpolantComputations, 16 PerfectInterpolantSequences, 3081/3276 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 593]: Loop Invariant Derived loop invariant: (((((((((a7 <= 0 && a21 == 1) && 15 <= a8) || (((14 <= a8 && a21 == 1) && a7 == 1) && a16 <= 5)) || (a7 == 1 && a20 == 1)) || (((a7 <= 0 && 14 <= a8) && a21 == 1) && a16 <= 5)) || ((a17 == 1 && a7 == 1) && a16 <= 5)) || ((a7 <= 0 && a21 == 1) && a16 <= 4)) || (((a21 == 1 && a17 == 1) && a16 <= 4) && a20 == 1)) || (((a7 <= 0 && a21 == 1) && a17 == 1) && a20 == 1)) || (((a7 <= 0 && 14 <= a8) && a21 == 1) && a20 == 1) - InvariantResult [Line: 587]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 40]: Loop Invariant Derived loop invariant: (((((((((a7 <= 0 && a21 == 1) && 15 <= a8) || (((14 <= a8 && a21 == 1) && a7 == 1) && a16 <= 5)) || (a7 == 1 && a20 == 1)) || (((a7 <= 0 && 14 <= a8) && a21 == 1) && a16 <= 5)) || ((a17 == 1 && a7 == 1) && a16 <= 5)) || ((a7 <= 0 && a21 == 1) && a16 <= 4)) || (((a21 == 1 && a17 == 1) && a16 <= 4) && a20 == 1)) || (((a7 <= 0 && a21 == 1) && a17 == 1) && a20 == 1)) || (((a7 <= 0 && 14 <= a8) && a21 == 1) && a20 == 1) RESULT: Ultimate proved your program to be correct! [2021-10-13 08:12:00,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e4fada5-c125-4853-92bb-c9cc3bc13b67/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...